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/loop-acceleration/functions_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 19:34:14,365 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 19:34:14,367 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 19:34:14,378 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 19:34:14,388 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 19:34:14,389 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 19:34:14,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 19:34:14,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 19:34:14,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 19:34:14,399 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 19:34:14,404 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 19:34:14,409 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 19:34:14,411 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 19:34:14,412 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 19:34:14,414 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 19:34:14,415 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 19:34:14,419 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 19:34:14,431 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 19:34:14,432 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 19:34:14,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 19:34:14,435 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 [2019-09-03 19:34:14,461 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 19:34:14,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 19:34:14,463 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 19:34:14,463 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 19:34:14,463 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 19:34:14,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 19:34:14,463 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 19:34:14,464 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 19:34:14,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 19:34:14,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 19:34:14,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 19:34:14,465 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 19:34:14,465 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 19:34:14,465 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 19:34:14,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 19:34:14,465 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 19:34:14,466 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 19:34:14,466 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 19:34:14,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 19:34:14,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 19:34:14,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 19:34:14,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 19:34:14,467 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 19:34:14,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 19:34:14,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 19:34:14,468 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 19:34:14,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 19:34:14,468 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 19:34:14,468 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 19:34:14,508 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 19:34:14,526 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 19:34:14,530 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 19:34:14,532 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 19:34:14,532 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 19:34:14,533 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2019-09-03 19:34:14,593 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239427c09/cada2091468c40118f7d29180c006627/FLAG7531308ab [2019-09-03 19:34:15,015 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 19:34:15,019 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/functions_1-1.c [2019-09-03 19:34:15,026 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239427c09/cada2091468c40118f7d29180c006627/FLAG7531308ab [2019-09-03 19:34:15,389 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/239427c09/cada2091468c40118f7d29180c006627 [2019-09-03 19:34:15,402 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 19:34:15,404 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 19:34:15,405 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 19:34:15,405 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 19:34:15,408 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 19:34:15,409 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,412 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26f9c9f9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15, skipping insertion in model container [2019-09-03 19:34:15,413 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,420 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 19:34:15,434 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 19:34:15,597 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:34:15,603 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 19:34:15,619 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 19:34:15,635 INFO L192 MainTranslator]: Completed translation [2019-09-03 19:34:15,635 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15 WrapperNode [2019-09-03 19:34:15,635 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 19:34:15,636 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 19:34:15,636 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 19:34:15,637 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 19:34:15,751 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,751 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,757 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,765 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,772 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,773 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (1/1) ... [2019-09-03 19:34:15,775 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 19:34:15,775 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 19:34:15,775 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 19:34:15,775 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 19:34:15,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (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 [2019-09-03 19:34:15,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 19:34:15,832 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 19:34:15,832 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 19:34:15,832 INFO L138 BoogieDeclarations]: Found implementation of procedure f [2019-09-03 19:34:15,833 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure f [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 19:34:15,833 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 19:34:15,989 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 19:34:15,989 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 19:34:15,990 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:34:15 BoogieIcfgContainer [2019-09-03 19:34:15,991 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 19:34:15,991 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 19:34:15,992 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 19:34:15,994 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 19:34:15,995 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 07:34:15" (1/3) ... [2019-09-03 19:34:15,995 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bb88b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:34:15, skipping insertion in model container [2019-09-03 19:34:15,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 07:34:15" (2/3) ... [2019-09-03 19:34:15,996 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@45bb88b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 07:34:15, skipping insertion in model container [2019-09-03 19:34:15,996 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 07:34:15" (3/3) ... [2019-09-03 19:34:15,998 INFO L109 eAbstractionObserver]: Analyzing ICFG functions_1-1.c [2019-09-03 19:34:16,008 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 19:34:16,016 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 19:34:16,033 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 19:34:16,061 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 19:34:16,062 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 19:34:16,062 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 19:34:16,062 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 19:34:16,063 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 19:34:16,063 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 19:34:16,063 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 19:34:16,063 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 19:34:16,063 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 19:34:16,078 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-09-03 19:34:16,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:34:16,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:16,083 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:16,085 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:16,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:16,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1238725826, now seen corresponding path program 1 times [2019-09-03 19:34:16,091 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:16,092 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:16,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,130 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:16,130 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:16,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:34:16,185 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:34:16,186 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 19:34:16,190 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 19:34:16,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 19:34:16,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 19:34:16,207 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2019-09-03 19:34:16,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:16,226 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2019-09-03 19:34:16,227 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 19:34:16,228 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 19:34:16,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:16,234 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:34:16,234 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 19:34:16,238 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 [2019-09-03 19:34:16,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 19:34:16,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 19:34:16,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 19:34:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2019-09-03 19:34:16,277 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 10 [2019-09-03 19:34:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:16,277 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2019-09-03 19:34:16,277 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 19:34:16,277 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2019-09-03 19:34:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 19:34:16,278 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:16,278 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:16,279 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:16,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1244266952, now seen corresponding path program 1 times [2019-09-03 19:34:16,280 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:16,280 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:16,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,281 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:16,281 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:16,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:34:16,402 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 19:34:16,402 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 19:34:16,404 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 19:34:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 19:34:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:34:16,405 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2019-09-03 19:34:16,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:16,430 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2019-09-03 19:34:16,431 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 19:34:16,432 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 10 [2019-09-03 19:34:16,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:16,435 INFO L225 Difference]: With dead ends: 24 [2019-09-03 19:34:16,435 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 19:34:16,436 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 19:34:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 19:34:16,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 17. [2019-09-03 19:34:16,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-09-03 19:34:16,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2019-09-03 19:34:16,450 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 10 [2019-09-03 19:34:16,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:16,450 INFO L475 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2019-09-03 19:34:16,451 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 19:34:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2019-09-03 19:34:16,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 19:34:16,452 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:16,452 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:16,453 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:16,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1831198934, now seen corresponding path program 1 times [2019-09-03 19:34:16,454 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:16,454 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:16,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,455 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:16,455 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:34:16,643 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:16,643 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) [2019-09-03 19:34:16,665 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:16,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:16,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-03 19:34:16,694 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 19:34:16,780 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:16,781 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-03 19:34:16,781 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-03 19:34:16,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-03 19:34:16,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2019-09-03 19:34:16,784 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 7 states. [2019-09-03 19:34:16,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:16,875 INFO L93 Difference]: Finished difference Result 27 states and 29 transitions. [2019-09-03 19:34:16,877 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-03 19:34:16,877 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-09-03 19:34:16,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:16,878 INFO L225 Difference]: With dead ends: 27 [2019-09-03 19:34:16,878 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 19:34:16,879 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 19:34:16,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 19:34:16,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2019-09-03 19:34:16,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2019-09-03 19:34:16,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2019-09-03 19:34:16,891 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 16 [2019-09-03 19:34:16,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:16,892 INFO L475 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2019-09-03 19:34:16,892 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-03 19:34:16,892 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2019-09-03 19:34:16,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 19:34:16,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:16,896 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:16,896 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:16,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:16,897 INFO L82 PathProgramCache]: Analyzing trace with hash 329045236, now seen corresponding path program 2 times [2019-09-03 19:34:16,900 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:16,900 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:16,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,901 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:16,901 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:17,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 19:34:17,122 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:17,122 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 [2019-09-03 19:34:17,134 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:34:17,150 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:34:17,150 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:17,151 INFO L256 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-03 19:34:17,153 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:17,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-09-03 19:34:17,203 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:17,203 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2019-09-03 19:34:17,204 INFO L454 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-09-03 19:34:17,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-09-03 19:34:17,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2019-09-03 19:34:17,205 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand 9 states. [2019-09-03 19:34:17,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:17,333 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2019-09-03 19:34:17,334 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-03 19:34:17,334 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 22 [2019-09-03 19:34:17,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:17,335 INFO L225 Difference]: With dead ends: 30 [2019-09-03 19:34:17,335 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 19:34:17,336 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:34:17,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 19:34:17,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2019-09-03 19:34:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2019-09-03 19:34:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 25 transitions. [2019-09-03 19:34:17,343 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 25 transitions. Word has length 22 [2019-09-03 19:34:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:17,344 INFO L475 AbstractCegarLoop]: Abstraction has 23 states and 25 transitions. [2019-09-03 19:34:17,344 INFO L476 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-09-03 19:34:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 25 transitions. [2019-09-03 19:34:17,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 19:34:17,345 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:17,346 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:17,346 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:17,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:17,346 INFO L82 PathProgramCache]: Analyzing trace with hash 755481234, now seen corresponding path program 3 times [2019-09-03 19:34:17,347 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:17,347 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:17,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:17,348 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:17,348 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:17,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:17,605 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:34:17,605 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:17,605 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) [2019-09-03 19:34:17,629 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:17,649 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2019-09-03 19:34:17,650 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:17,651 WARN L254 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 19:34:17,653 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:17,731 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2019-09-03 19:34:17,735 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:17,735 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2019-09-03 19:34:17,736 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-03 19:34:17,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-03 19:34:17,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2019-09-03 19:34:17,737 INFO L87 Difference]: Start difference. First operand 23 states and 25 transitions. Second operand 11 states. [2019-09-03 19:34:17,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:17,888 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-03 19:34:17,888 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 19:34:17,888 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 28 [2019-09-03 19:34:17,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:17,889 INFO L225 Difference]: With dead ends: 33 [2019-09-03 19:34:17,890 INFO L226 Difference]: Without dead ends: 28 [2019-09-03 19:34:17,890 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2019-09-03 19:34:17,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-03 19:34:17,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 26. [2019-09-03 19:34:17,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-03 19:34:17,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2019-09-03 19:34:17,897 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 28 [2019-09-03 19:34:17,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:17,898 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2019-09-03 19:34:17,898 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-03 19:34:17,898 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2019-09-03 19:34:17,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-03 19:34:17,899 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:17,900 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:17,900 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:17,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:17,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1475645008, now seen corresponding path program 4 times [2019-09-03 19:34:17,901 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:17,901 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:17,902 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:17,902 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:17,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:18,158 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-03 19:34:18,159 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:18,159 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) [2019-09-03 19:34:18,174 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:18,201 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:34:18,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:18,203 WARN L254 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2019-09-03 19:34:18,211 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2019-09-03 19:34:18,287 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:18,287 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-03 19:34:18,287 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 19:34:18,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 19:34:18,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2019-09-03 19:34:18,289 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand 13 states. [2019-09-03 19:34:18,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:18,523 INFO L93 Difference]: Finished difference Result 36 states and 41 transitions. [2019-09-03 19:34:18,523 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 19:34:18,523 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2019-09-03 19:34:18,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:18,524 INFO L225 Difference]: With dead ends: 36 [2019-09-03 19:34:18,524 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 19:34:18,525 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 32 SyntacticMatches, 6 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:34:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 19:34:18,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2019-09-03 19:34:18,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-03 19:34:18,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-03 19:34:18,532 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 34 [2019-09-03 19:34:18,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:18,532 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-03 19:34:18,533 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 19:34:18,533 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-03 19:34:18,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-03 19:34:18,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:18,534 INFO L399 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:18,535 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:18,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:18,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1545919054, now seen corresponding path program 5 times [2019-09-03 19:34:18,535 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:18,535 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:18,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:18,536 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:18,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:18,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:18,793 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-03 19:34:18,794 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:18,794 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) [2019-09-03 19:34:18,808 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 [2019-09-03 19:34:18,849 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-03 19:34:18,849 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:18,851 WARN L254 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 53 conjunts are in the unsatisfiable core [2019-09-03 19:34:18,854 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:18,924 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2019-09-03 19:34:18,927 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:18,928 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-03 19:34:18,928 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 19:34:18,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 19:34:18,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2019-09-03 19:34:18,929 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 15 states. [2019-09-03 19:34:19,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:19,213 INFO L93 Difference]: Finished difference Result 39 states and 45 transitions. [2019-09-03 19:34:19,213 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 19:34:19,214 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 40 [2019-09-03 19:34:19,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:19,216 INFO L225 Difference]: With dead ends: 39 [2019-09-03 19:34:19,216 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 19:34:19,217 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 38 SyntacticMatches, 7 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2019-09-03 19:34:19,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 19:34:19,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2019-09-03 19:34:19,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2019-09-03 19:34:19,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 37 transitions. [2019-09-03 19:34:19,232 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 37 transitions. Word has length 40 [2019-09-03 19:34:19,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:19,232 INFO L475 AbstractCegarLoop]: Abstraction has 32 states and 37 transitions. [2019-09-03 19:34:19,232 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 19:34:19,232 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 37 transitions. [2019-09-03 19:34:19,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 19:34:19,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:19,234 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:19,234 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:19,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:19,239 INFO L82 PathProgramCache]: Analyzing trace with hash 128504940, now seen corresponding path program 6 times [2019-09-03 19:34:19,239 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:19,239 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:19,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:19,240 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:19,240 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:19,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:19,552 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 19:34:19,552 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:19,553 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) [2019-09-03 19:34:19,566 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 [2019-09-03 19:34:19,601 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 19:34:19,601 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:19,603 WARN L254 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 63 conjunts are in the unsatisfiable core [2019-09-03 19:34:19,607 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:19,685 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2019-09-03 19:34:19,690 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:19,691 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2019-09-03 19:34:19,691 INFO L454 AbstractCegarLoop]: Interpolant automaton has 17 states [2019-09-03 19:34:19,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2019-09-03 19:34:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2019-09-03 19:34:19,694 INFO L87 Difference]: Start difference. First operand 32 states and 37 transitions. Second operand 17 states. [2019-09-03 19:34:20,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:20,065 INFO L93 Difference]: Finished difference Result 42 states and 49 transitions. [2019-09-03 19:34:20,066 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-03 19:34:20,066 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2019-09-03 19:34:20,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:20,067 INFO L225 Difference]: With dead ends: 42 [2019-09-03 19:34:20,067 INFO L226 Difference]: Without dead ends: 37 [2019-09-03 19:34:20,068 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 44 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:34:20,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2019-09-03 19:34:20,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 35. [2019-09-03 19:34:20,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2019-09-03 19:34:20,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 41 transitions. [2019-09-03 19:34:20,075 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 41 transitions. Word has length 46 [2019-09-03 19:34:20,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:20,075 INFO L475 AbstractCegarLoop]: Abstraction has 35 states and 41 transitions. [2019-09-03 19:34:20,075 INFO L476 AbstractCegarLoop]: Interpolant automaton has 17 states. [2019-09-03 19:34:20,076 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 41 transitions. [2019-09-03 19:34:20,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-09-03 19:34:20,077 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:20,077 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:20,077 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:20,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:20,078 INFO L82 PathProgramCache]: Analyzing trace with hash -842776566, now seen corresponding path program 7 times [2019-09-03 19:34:20,078 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:20,078 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:20,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:20,079 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:20,079 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:20,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:20,353 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-03 19:34:20,354 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:20,354 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) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:20,374 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:20,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:20,392 WARN L254 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 73 conjunts are in the unsatisfiable core [2019-09-03 19:34:20,395 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:20,489 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2019-09-03 19:34:20,498 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:20,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-03 19:34:20,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 19:34:20,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 19:34:20,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2019-09-03 19:34:20,503 INFO L87 Difference]: Start difference. First operand 35 states and 41 transitions. Second operand 19 states. [2019-09-03 19:34:21,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:21,159 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2019-09-03 19:34:21,164 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 19:34:21,164 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2019-09-03 19:34:21,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:21,165 INFO L225 Difference]: With dead ends: 45 [2019-09-03 19:34:21,165 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 19:34:21,166 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 50 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2019-09-03 19:34:21,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 19:34:21,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2019-09-03 19:34:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2019-09-03 19:34:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2019-09-03 19:34:21,173 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 52 [2019-09-03 19:34:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:21,173 INFO L475 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2019-09-03 19:34:21,173 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 19:34:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2019-09-03 19:34:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 19:34:21,174 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:21,175 INFO L399 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:21,175 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:21,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:21,175 INFO L82 PathProgramCache]: Analyzing trace with hash 880540968, now seen corresponding path program 8 times [2019-09-03 19:34:21,175 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:21,175 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:21,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:21,176 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:34:21,176 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-03 19:34:21,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:21,502 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 [2019-09-03 19:34:21,518 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:34:21,543 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:34:21,543 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:21,545 WARN L254 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 83 conjunts are in the unsatisfiable core [2019-09-03 19:34:21,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:21,635 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2019-09-03 19:34:21,639 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:21,640 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-03 19:34:21,640 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 19:34:21,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 19:34:21,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2019-09-03 19:34:21,641 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand 21 states. [2019-09-03 19:34:22,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:22,167 INFO L93 Difference]: Finished difference Result 48 states and 57 transitions. [2019-09-03 19:34:22,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 19:34:22,167 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 58 [2019-09-03 19:34:22,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:22,170 INFO L225 Difference]: With dead ends: 48 [2019-09-03 19:34:22,170 INFO L226 Difference]: Without dead ends: 43 [2019-09-03 19:34:22,171 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=88, Invalid=724, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:34:22,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2019-09-03 19:34:22,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 41. [2019-09-03 19:34:22,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2019-09-03 19:34:22,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2019-09-03 19:34:22,178 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 58 [2019-09-03 19:34:22,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:22,179 INFO L475 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2019-09-03 19:34:22,179 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 19:34:22,179 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2019-09-03 19:34:22,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-03 19:34:22,181 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:22,181 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:22,181 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:22,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:22,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1565725754, now seen corresponding path program 9 times [2019-09-03 19:34:22,182 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:22,182 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:22,183 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:22,183 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:22,563 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-03 19:34:22,563 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:22,564 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) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:22,585 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:34:22,818 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2019-09-03 19:34:22,818 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:22,821 WARN L254 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 93 conjunts are in the unsatisfiable core [2019-09-03 19:34:22,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2019-09-03 19:34:22,937 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:22,937 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-03 19:34:22,938 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 19:34:22,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 19:34:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2019-09-03 19:34:22,939 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand 23 states. [2019-09-03 19:34:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:23,581 INFO L93 Difference]: Finished difference Result 51 states and 61 transitions. [2019-09-03 19:34:23,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-03 19:34:23,581 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 64 [2019-09-03 19:34:23,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:23,583 INFO L225 Difference]: With dead ends: 51 [2019-09-03 19:34:23,583 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 19:34:23,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2019-09-03 19:34:23,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 19:34:23,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2019-09-03 19:34:23,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2019-09-03 19:34:23,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2019-09-03 19:34:23,591 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 64 [2019-09-03 19:34:23,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:23,591 INFO L475 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2019-09-03 19:34:23,591 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 19:34:23,592 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2019-09-03 19:34:23,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 19:34:23,593 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:23,593 INFO L399 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:23,593 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:23,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:23,594 INFO L82 PathProgramCache]: Analyzing trace with hash 1577839588, now seen corresponding path program 10 times [2019-09-03 19:34:23,594 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:23,594 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:23,595 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:23,595 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:23,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:24,053 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [2019-09-03 19:34:24,054 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:24,054 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) [2019-09-03 19:34:24,069 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:24,097 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:34:24,098 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:34:24,100 WARN L254 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 103 conjunts are in the unsatisfiable core [2019-09-03 19:34:24,104 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:34:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 280 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 135 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (11)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:34:24,220 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:34:24,220 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2019-09-03 19:34:24,221 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 19:34:24,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 19:34:24,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2019-09-03 19:34:24,221 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand 25 states. [2019-09-03 19:34:24,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:34:24,915 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2019-09-03 19:34:24,915 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 19:34:24,915 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 70 [2019-09-03 19:34:24,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:34:24,917 INFO L225 Difference]: With dead ends: 54 [2019-09-03 19:34:24,917 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 19:34:24,918 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 68 SyntacticMatches, 12 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=108, Invalid=1082, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:34:24,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 19:34:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-03 19:34:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-03 19:34:24,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2019-09-03 19:34:24,924 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 70 [2019-09-03 19:34:24,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:34:24,925 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2019-09-03 19:34:24,925 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 19:34:24,925 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2019-09-03 19:34:24,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-03 19:34:24,927 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:34:24,927 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:34:24,927 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:34:24,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:34:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash 153476482, now seen corresponding path program 11 times [2019-09-03 19:34:24,928 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:34:24,928 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:34:24,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:24,929 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:34:24,929 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:34:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:34:25,452 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-03 19:34:25,452 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:34:25,452 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) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:34:25,463 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:35:33,743 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2019-09-03 19:35:33,744 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:35:34,105 WARN L254 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 113 conjunts are in the unsatisfiable core [2019-09-03 19:35:34,108 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:35:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 341 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2019-09-03 19:35:34,242 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:35:34,242 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-03 19:35:34,243 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 19:35:34,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 19:35:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2019-09-03 19:35:34,247 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 27 states. [2019-09-03 19:35:35,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:35:35,105 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2019-09-03 19:35:35,105 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 19:35:35,105 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 76 [2019-09-03 19:35:35,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:35:35,107 INFO L225 Difference]: With dead ends: 57 [2019-09-03 19:35:35,107 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 19:35:35,108 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 13 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=118, Invalid=1288, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 19:35:35,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 19:35:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2019-09-03 19:35:35,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2019-09-03 19:35:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 61 transitions. [2019-09-03 19:35:35,115 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 61 transitions. Word has length 76 [2019-09-03 19:35:35,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:35:35,116 INFO L475 AbstractCegarLoop]: Abstraction has 50 states and 61 transitions. [2019-09-03 19:35:35,116 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 19:35:35,116 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 61 transitions. [2019-09-03 19:35:35,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-03 19:35:35,118 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:35:35,118 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:35:35,118 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:35:35,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:35:35,118 INFO L82 PathProgramCache]: Analyzing trace with hash -1587568480, now seen corresponding path program 12 times [2019-09-03 19:35:35,119 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:35:35,119 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:35:35,119 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:35:35,119 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:35:35,120 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:35:35,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:35:35,640 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [2019-09-03 19:35:35,640 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:35:35,640 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) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:35:35,651 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:35:58,473 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 19:35:58,473 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:35:58,603 WARN L254 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 123 conjunts are in the unsatisfiable core [2019-09-03 19:35:58,606 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:35:58,733 INFO L134 CoverageAnalysis]: Checked inductivity of 408 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 198 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (13)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:35:58,749 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:35:58,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2019-09-03 19:35:58,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 29 states [2019-09-03 19:35:58,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2019-09-03 19:35:58,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2019-09-03 19:35:58,752 INFO L87 Difference]: Start difference. First operand 50 states and 61 transitions. Second operand 29 states. [2019-09-03 19:35:59,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:35:59,734 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2019-09-03 19:35:59,734 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-03 19:35:59,735 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 82 [2019-09-03 19:35:59,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:35:59,736 INFO L225 Difference]: With dead ends: 60 [2019-09-03 19:35:59,736 INFO L226 Difference]: Without dead ends: 55 [2019-09-03 19:35:59,738 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 80 SyntacticMatches, 14 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=128, Invalid=1512, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:35:59,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-09-03 19:35:59,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 53. [2019-09-03 19:35:59,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2019-09-03 19:35:59,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2019-09-03 19:35:59,748 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 82 [2019-09-03 19:35:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:35:59,755 INFO L475 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2019-09-03 19:35:59,755 INFO L476 AbstractCegarLoop]: Interpolant automaton has 29 states. [2019-09-03 19:35:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2019-09-03 19:35:59,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-03 19:35:59,757 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:35:59,757 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:35:59,757 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:35:59,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:35:59,757 INFO L82 PathProgramCache]: Analyzing trace with hash -50981570, now seen corresponding path program 13 times [2019-09-03 19:35:59,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:35:59,758 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:35:59,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:35:59,758 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:35:59,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:35:59,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:36:00,350 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-03 19:36:00,351 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:36:00,351 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 [2019-09-03 19:36:00,364 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:36:00,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:36:00,398 WARN L254 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 133 conjunts are in the unsatisfiable core [2019-09-03 19:36:00,400 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:36:00,498 INFO L134 CoverageAnalysis]: Checked inductivity of 481 backedges. 0 proven. 247 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2019-09-03 19:36:00,501 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:36:00,502 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2019-09-03 19:36:00,502 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-03 19:36:00,502 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-03 19:36:00,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2019-09-03 19:36:00,503 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand 31 states. [2019-09-03 19:36:01,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:36:01,592 INFO L93 Difference]: Finished difference Result 63 states and 77 transitions. [2019-09-03 19:36:01,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-03 19:36:01,593 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 88 [2019-09-03 19:36:01,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:36:01,594 INFO L225 Difference]: With dead ends: 63 [2019-09-03 19:36:01,595 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 19:36:01,596 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 86 SyntacticMatches, 15 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=1754, Unknown=0, NotChecked=0, Total=1892 [2019-09-03 19:36:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 19:36:01,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2019-09-03 19:36:01,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2019-09-03 19:36:01,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2019-09-03 19:36:01,602 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 88 [2019-09-03 19:36:01,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:36:01,603 INFO L475 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2019-09-03 19:36:01,603 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-03 19:36:01,603 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2019-09-03 19:36:01,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-03 19:36:01,604 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:36:01,604 INFO L399 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:36:01,605 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:36:01,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:36:01,605 INFO L82 PathProgramCache]: Analyzing trace with hash -922870948, now seen corresponding path program 14 times [2019-09-03 19:36:01,605 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:36:01,605 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:36:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:36:01,606 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:36:01,606 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:36:01,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:36:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [2019-09-03 19:36:02,316 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:36:02,317 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) [2019-09-03 19:36:02,342 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:36:02,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:36:02,380 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:36:02,383 WARN L254 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 143 conjunts are in the unsatisfiable core [2019-09-03 19:36:02,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:36:02,532 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 0 proven. 287 refuted. 0 times theorem prover too weak. 273 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (15)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 19:36:02,543 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:36:02,543 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2019-09-03 19:36:02,544 INFO L454 AbstractCegarLoop]: Interpolant automaton has 33 states [2019-09-03 19:36:02,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2019-09-03 19:36:02,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2019-09-03 19:36:02,545 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 33 states. [2019-09-03 19:36:03,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:36:03,794 INFO L93 Difference]: Finished difference Result 66 states and 81 transitions. [2019-09-03 19:36:03,795 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2019-09-03 19:36:03,795 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 94 [2019-09-03 19:36:03,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:36:03,796 INFO L225 Difference]: With dead ends: 66 [2019-09-03 19:36:03,797 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 19:36:03,798 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 92 SyntacticMatches, 16 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=148, Invalid=2014, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:36:03,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 19:36:03,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-03 19:36:03,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-03 19:36:03,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 73 transitions. [2019-09-03 19:36:03,804 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 73 transitions. Word has length 94 [2019-09-03 19:36:03,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:36:03,804 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 73 transitions. [2019-09-03 19:36:03,805 INFO L476 AbstractCegarLoop]: Interpolant automaton has 33 states. [2019-09-03 19:36:03,805 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 73 transitions. [2019-09-03 19:36:03,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 19:36:03,806 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:36:03,806 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:36:03,806 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:36:03,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:36:03,807 INFO L82 PathProgramCache]: Analyzing trace with hash 124031738, now seen corresponding path program 15 times [2019-09-03 19:36:03,807 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:36:03,807 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:36:03,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:36:03,808 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:36:03,808 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:36:03,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:36:04,567 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-03 19:36:04,567 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:36:04,567 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) [2019-09-03 19:36:04,587 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:11,517 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-03 19:37:11,517 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:11,579 WARN L254 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 154 conjunts are in the unsatisfiable core [2019-09-03 19:37:11,581 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:11,756 INFO L134 CoverageAnalysis]: Checked inductivity of 645 backedges. 0 proven. 330 refuted. 0 times theorem prover too weak. 315 trivial. 0 not checked. [2019-09-03 19:37:11,762 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:11,763 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2019-09-03 19:37:11,763 INFO L454 AbstractCegarLoop]: Interpolant automaton has 35 states [2019-09-03 19:37:11,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2019-09-03 19:37:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2019-09-03 19:37:11,764 INFO L87 Difference]: Start difference. First operand 59 states and 73 transitions. Second operand 35 states. [2019-09-03 19:37:13,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:13,304 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2019-09-03 19:37:13,305 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 19:37:13,305 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 100 [2019-09-03 19:37:13,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:13,306 INFO L225 Difference]: With dead ends: 69 [2019-09-03 19:37:13,306 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 19:37:13,307 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 97 SyntacticMatches, 18 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=158, Invalid=2292, Unknown=0, NotChecked=0, Total=2450 [2019-09-03 19:37:13,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 19:37:13,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2019-09-03 19:37:13,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2019-09-03 19:37:13,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2019-09-03 19:37:13,314 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 100 [2019-09-03 19:37:13,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:13,314 INFO L475 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2019-09-03 19:37:13,314 INFO L476 AbstractCegarLoop]: Interpolant automaton has 35 states. [2019-09-03 19:37:13,315 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2019-09-03 19:37:13,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 19:37:13,316 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:13,316 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:13,316 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:13,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:13,316 INFO L82 PathProgramCache]: Analyzing trace with hash 216947736, now seen corresponding path program 16 times [2019-09-03 19:37:13,317 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:13,317 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:13,317 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:13,318 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:13,318 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:14,043 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-03 19:37:14,045 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:14,045 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) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:14,056 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:37:14,091 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:37:14,091 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:37:14,094 WARN L254 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 163 conjunts are in the unsatisfiable core [2019-09-03 19:37:14,097 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:37:14,241 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 376 refuted. 0 times theorem prover too weak. 360 trivial. 0 not checked. [2019-09-03 19:37:14,250 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:37:14,251 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2019-09-03 19:37:14,252 INFO L454 AbstractCegarLoop]: Interpolant automaton has 37 states [2019-09-03 19:37:14,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2019-09-03 19:37:14,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1244, Unknown=0, NotChecked=0, Total=1332 [2019-09-03 19:37:14,253 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand 37 states. [2019-09-03 19:37:16,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:37:16,170 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2019-09-03 19:37:16,170 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-03 19:37:16,170 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 106 [2019-09-03 19:37:16,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:37:16,171 INFO L225 Difference]: With dead ends: 72 [2019-09-03 19:37:16,171 INFO L226 Difference]: Without dead ends: 67 [2019-09-03 19:37:16,173 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 104 SyntacticMatches, 18 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=168, Invalid=2588, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 19:37:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2019-09-03 19:37:16,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2019-09-03 19:37:16,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2019-09-03 19:37:16,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 81 transitions. [2019-09-03 19:37:16,184 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 81 transitions. Word has length 106 [2019-09-03 19:37:16,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:37:16,185 INFO L475 AbstractCegarLoop]: Abstraction has 65 states and 81 transitions. [2019-09-03 19:37:16,185 INFO L476 AbstractCegarLoop]: Interpolant automaton has 37 states. [2019-09-03 19:37:16,185 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 81 transitions. [2019-09-03 19:37:16,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-03 19:37:16,187 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:37:16,187 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:37:16,187 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:37:16,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:37:16,187 INFO L82 PathProgramCache]: Analyzing trace with hash -13085002, now seen corresponding path program 17 times [2019-09-03 19:37:16,188 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:37:16,188 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:37:16,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:16,189 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:37:16,189 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:37:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:37:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-03 19:37:17,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:37:17,111 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) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:37:17,122 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:39:16,758 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2019-09-03 19:39:16,758 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:39:17,051 WARN L254 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 173 conjunts are in the unsatisfiable core [2019-09-03 19:39:17,054 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:39:17,170 INFO L134 CoverageAnalysis]: Checked inductivity of 833 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 408 trivial. 0 not checked. [2019-09-03 19:39:17,177 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:39:17,178 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-03 19:39:17,178 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-03 19:39:17,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-03 19:39:17,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1389, Unknown=0, NotChecked=0, Total=1482 [2019-09-03 19:39:17,179 INFO L87 Difference]: Start difference. First operand 65 states and 81 transitions. Second operand 39 states. [2019-09-03 19:39:18,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:39:18,905 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2019-09-03 19:39:18,905 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 19:39:18,906 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 112 [2019-09-03 19:39:18,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:39:18,907 INFO L225 Difference]: With dead ends: 75 [2019-09-03 19:39:18,908 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 19:39:18,909 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 110 SyntacticMatches, 19 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=178, Invalid=2902, Unknown=0, NotChecked=0, Total=3080 [2019-09-03 19:39:18,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 19:39:18,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2019-09-03 19:39:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2019-09-03 19:39:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2019-09-03 19:39:18,915 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 112 [2019-09-03 19:39:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:39:18,915 INFO L475 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2019-09-03 19:39:18,915 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-03 19:39:18,916 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2019-09-03 19:39:18,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2019-09-03 19:39:18,917 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:39:18,917 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:39:18,917 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:39:18,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:39:18,917 INFO L82 PathProgramCache]: Analyzing trace with hash -759733548, now seen corresponding path program 18 times [2019-09-03 19:39:18,917 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:39:18,918 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:39:18,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:18,918 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:39:18,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:39:19,903 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-03 19:39:19,903 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:39:19,903 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) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:39:19,913 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:39:26,552 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 19:39:26,553 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:39:26,581 WARN L254 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 183 conjunts are in the unsatisfiable core [2019-09-03 19:39:26,583 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:39:26,711 INFO L134 CoverageAnalysis]: Checked inductivity of 936 backedges. 0 proven. 477 refuted. 0 times theorem prover too weak. 459 trivial. 0 not checked. [2019-09-03 19:39:26,716 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:39:26,716 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2019-09-03 19:39:26,717 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-03 19:39:26,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-03 19:39:26,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2019-09-03 19:39:26,718 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 41 states. [2019-09-03 19:39:28,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:39:28,663 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2019-09-03 19:39:28,667 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2019-09-03 19:39:28,667 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 118 [2019-09-03 19:39:28,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:39:28,669 INFO L225 Difference]: With dead ends: 78 [2019-09-03 19:39:28,669 INFO L226 Difference]: Without dead ends: 73 [2019-09-03 19:39:28,670 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 116 SyntacticMatches, 20 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=188, Invalid=3234, Unknown=0, NotChecked=0, Total=3422 [2019-09-03 19:39:28,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-03 19:39:28,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-03 19:39:28,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-03 19:39:28,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 89 transitions. [2019-09-03 19:39:28,675 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 89 transitions. Word has length 118 [2019-09-03 19:39:28,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:39:28,675 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 89 transitions. [2019-09-03 19:39:28,676 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-03 19:39:28,676 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 89 transitions. [2019-09-03 19:39:28,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2019-09-03 19:39:28,677 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:39:28,677 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:39:28,677 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:39:28,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:39:28,677 INFO L82 PathProgramCache]: Analyzing trace with hash -927440782, now seen corresponding path program 19 times [2019-09-03 19:39:28,677 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:39:28,678 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:39:28,678 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:28,678 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:39:28,679 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:28,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:39:29,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-03 19:39:29,631 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:39:29,631 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) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:39:29,641 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:39:29,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:39:29,685 WARN L254 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 193 conjunts are in the unsatisfiable core [2019-09-03 19:39:29,688 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:39:29,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1045 backedges. 0 proven. 532 refuted. 0 times theorem prover too weak. 513 trivial. 0 not checked. [2019-09-03 19:39:29,817 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:39:29,817 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2019-09-03 19:39:29,817 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-03 19:39:29,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-03 19:39:29,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1703, Unknown=0, NotChecked=0, Total=1806 [2019-09-03 19:39:29,819 INFO L87 Difference]: Start difference. First operand 71 states and 89 transitions. Second operand 43 states. [2019-09-03 19:39:31,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:39:31,980 INFO L93 Difference]: Finished difference Result 81 states and 101 transitions. [2019-09-03 19:39:31,980 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2019-09-03 19:39:31,980 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 124 [2019-09-03 19:39:31,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:39:31,982 INFO L225 Difference]: With dead ends: 81 [2019-09-03 19:39:31,982 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 19:39:31,984 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 122 SyntacticMatches, 21 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=3584, Unknown=0, NotChecked=0, Total=3782 [2019-09-03 19:39:31,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 19:39:31,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 74. [2019-09-03 19:39:31,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2019-09-03 19:39:31,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 93 transitions. [2019-09-03 19:39:31,989 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 93 transitions. Word has length 124 [2019-09-03 19:39:31,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:39:31,990 INFO L475 AbstractCegarLoop]: Abstraction has 74 states and 93 transitions. [2019-09-03 19:39:31,990 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-03 19:39:31,990 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 93 transitions. [2019-09-03 19:39:31,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-03 19:39:31,991 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:39:31,991 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:39:31,991 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:39:31,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:39:31,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1835020176, now seen corresponding path program 20 times [2019-09-03 19:39:31,992 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:39:31,992 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:39:31,992 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:31,992 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:39:31,993 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:39:33,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-03 19:39:33,023 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:39:33,023 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 [2019-09-03 19:39:33,035 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:39:33,086 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:39:33,086 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:39:33,090 WARN L254 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 203 conjunts are in the unsatisfiable core [2019-09-03 19:39:33,092 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:39:33,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1160 backedges. 0 proven. 590 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2019-09-03 19:39:33,300 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:39:33,301 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2019-09-03 19:39:33,301 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-03 19:39:33,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-03 19:39:33,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1872, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 19:39:33,303 INFO L87 Difference]: Start difference. First operand 74 states and 93 transitions. Second operand 45 states. [2019-09-03 19:39:35,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:39:35,589 INFO L93 Difference]: Finished difference Result 84 states and 105 transitions. [2019-09-03 19:39:35,592 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-03 19:39:35,593 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 130 [2019-09-03 19:39:35,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:39:35,594 INFO L225 Difference]: With dead ends: 84 [2019-09-03 19:39:35,594 INFO L226 Difference]: Without dead ends: 79 [2019-09-03 19:39:35,595 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 128 SyntacticMatches, 22 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=208, Invalid=3952, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 19:39:35,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2019-09-03 19:39:35,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2019-09-03 19:39:35,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2019-09-03 19:39:35,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2019-09-03 19:39:35,601 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 130 [2019-09-03 19:39:35,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:39:35,601 INFO L475 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2019-09-03 19:39:35,601 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-03 19:39:35,602 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2019-09-03 19:39:35,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-09-03 19:39:35,603 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:39:35,603 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:39:35,603 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:39:35,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:39:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 363573294, now seen corresponding path program 21 times [2019-09-03 19:39:35,604 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:39:35,604 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:39:35,604 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:35,604 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:39:35,605 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:39:35,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:39:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-03 19:39:36,719 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:39:36,719 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 [2019-09-03 19:39:36,730 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 19:40:45,025 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-03 19:40:45,025 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:40:46,489 WARN L254 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 214 conjunts are in the unsatisfiable core [2019-09-03 19:40:46,492 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:40:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1281 backedges. 0 proven. 651 refuted. 0 times theorem prover too weak. 630 trivial. 0 not checked. [2019-09-03 19:40:46,664 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:40:46,665 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2019-09-03 19:40:46,665 INFO L454 AbstractCegarLoop]: Interpolant automaton has 47 states [2019-09-03 19:40:46,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2019-09-03 19:40:46,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=2049, Unknown=0, NotChecked=0, Total=2162 [2019-09-03 19:40:46,666 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand 47 states. [2019-09-03 19:40:49,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:40:49,138 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2019-09-03 19:40:49,138 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-03 19:40:49,138 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 136 [2019-09-03 19:40:49,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:40:49,140 INFO L225 Difference]: With dead ends: 87 [2019-09-03 19:40:49,140 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 19:40:49,142 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 133 SyntacticMatches, 24 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=218, Invalid=4338, Unknown=0, NotChecked=0, Total=4556 [2019-09-03 19:40:49,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 19:40:49,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2019-09-03 19:40:49,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2019-09-03 19:40:49,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 101 transitions. [2019-09-03 19:40:49,147 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 101 transitions. Word has length 136 [2019-09-03 19:40:49,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:40:49,148 INFO L475 AbstractCegarLoop]: Abstraction has 80 states and 101 transitions. [2019-09-03 19:40:49,148 INFO L476 AbstractCegarLoop]: Interpolant automaton has 47 states. [2019-09-03 19:40:49,148 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 101 transitions. [2019-09-03 19:40:49,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2019-09-03 19:40:49,149 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:40:49,149 INFO L399 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:40:49,149 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:40:49,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:40:49,150 INFO L82 PathProgramCache]: Analyzing trace with hash -579878324, now seen corresponding path program 22 times [2019-09-03 19:40:49,150 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:40:49,150 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:40:49,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:49,151 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:40:49,151 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:40:50,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2019-09-03 19:40:50,468 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:40:50,468 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 [2019-09-03 19:40:50,479 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 19:40:50,525 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 19:40:50,525 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:40:50,528 WARN L254 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 223 conjunts are in the unsatisfiable core [2019-09-03 19:40:50,531 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:40:50,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1408 backedges. 0 proven. 715 refuted. 0 times theorem prover too weak. 693 trivial. 0 not checked. [2019-09-03 19:40:50,718 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:40:50,718 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2019-09-03 19:40:50,719 INFO L454 AbstractCegarLoop]: Interpolant automaton has 49 states [2019-09-03 19:40:50,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2019-09-03 19:40:50,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2019-09-03 19:40:50,721 INFO L87 Difference]: Start difference. First operand 80 states and 101 transitions. Second operand 49 states. [2019-09-03 19:40:53,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:40:53,385 INFO L93 Difference]: Finished difference Result 90 states and 113 transitions. [2019-09-03 19:40:53,386 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-03 19:40:53,386 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 142 [2019-09-03 19:40:53,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:40:53,387 INFO L225 Difference]: With dead ends: 90 [2019-09-03 19:40:53,388 INFO L226 Difference]: Without dead ends: 85 [2019-09-03 19:40:53,390 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 140 SyntacticMatches, 24 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=4742, Unknown=0, NotChecked=0, Total=4970 [2019-09-03 19:40:53,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-03 19:40:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-03 19:40:53,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-03 19:40:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 105 transitions. [2019-09-03 19:40:53,395 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 105 transitions. Word has length 142 [2019-09-03 19:40:53,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:40:53,395 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 105 transitions. [2019-09-03 19:40:53,395 INFO L476 AbstractCegarLoop]: Interpolant automaton has 49 states. [2019-09-03 19:40:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 105 transitions. [2019-09-03 19:40:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2019-09-03 19:40:53,396 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:40:53,396 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:40:53,397 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:40:53,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:40:53,397 INFO L82 PathProgramCache]: Analyzing trace with hash 626607594, now seen corresponding path program 23 times [2019-09-03 19:40:53,397 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:40:53,397 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:40:53,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:53,398 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:40:53,398 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:40:53,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:40:54,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-09-03 19:40:54,761 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:40:54,761 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) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:40:54,772 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 19:44:58,935 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2019-09-03 19:44:58,935 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:44:59,242 WARN L254 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 233 conjunts are in the unsatisfiable core [2019-09-03 19:44:59,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:44:59,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1541 backedges. 0 proven. 782 refuted. 0 times theorem prover too weak. 759 trivial. 0 not checked. [2019-09-03 19:44:59,400 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:44:59,400 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2019-09-03 19:44:59,401 INFO L454 AbstractCegarLoop]: Interpolant automaton has 51 states [2019-09-03 19:44:59,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2019-09-03 19:44:59,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2427, Unknown=0, NotChecked=0, Total=2550 [2019-09-03 19:44:59,402 INFO L87 Difference]: Start difference. First operand 83 states and 105 transitions. Second operand 51 states. [2019-09-03 19:45:02,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:45:02,385 INFO L93 Difference]: Finished difference Result 93 states and 117 transitions. [2019-09-03 19:45:02,385 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-03 19:45:02,385 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 148 [2019-09-03 19:45:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:45:02,387 INFO L225 Difference]: With dead ends: 93 [2019-09-03 19:45:02,387 INFO L226 Difference]: Without dead ends: 88 [2019-09-03 19:45:02,388 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 146 SyntacticMatches, 25 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 278 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=238, Invalid=5164, Unknown=0, NotChecked=0, Total=5402 [2019-09-03 19:45:02,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2019-09-03 19:45:02,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 86. [2019-09-03 19:45:02,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2019-09-03 19:45:02,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 109 transitions. [2019-09-03 19:45:02,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 109 transitions. Word has length 148 [2019-09-03 19:45:02,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:45:02,394 INFO L475 AbstractCegarLoop]: Abstraction has 86 states and 109 transitions. [2019-09-03 19:45:02,394 INFO L476 AbstractCegarLoop]: Interpolant automaton has 51 states. [2019-09-03 19:45:02,394 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 109 transitions. [2019-09-03 19:45:02,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-03 19:45:02,395 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:45:02,395 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:45:02,395 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:45:02,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:45:02,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1863509240, now seen corresponding path program 24 times [2019-09-03 19:45:02,396 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:45:02,396 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:45:02,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:45:02,397 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:45:02,397 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:45:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:45:03,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2019-09-03 19:45:03,935 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:45:03,935 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) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:45:03,946 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 19:47:36,346 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2019-09-03 19:47:36,347 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:47:36,980 WARN L254 TraceCheckSpWp]: Trace formula consists of 358 conjuncts, 243 conjunts are in the unsatisfiable core [2019-09-03 19:47:36,983 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:47:37,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1680 backedges. 0 proven. 852 refuted. 0 times theorem prover too weak. 828 trivial. 0 not checked. [2019-09-03 19:47:37,145 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:47:37,145 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2019-09-03 19:47:37,145 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-03 19:47:37,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-03 19:47:37,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=2628, Unknown=0, NotChecked=0, Total=2756 [2019-09-03 19:47:37,146 INFO L87 Difference]: Start difference. First operand 86 states and 109 transitions. Second operand 53 states. [2019-09-03 19:47:40,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:40,343 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2019-09-03 19:47:40,343 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-03 19:47:40,344 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 154 [2019-09-03 19:47:40,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:40,345 INFO L225 Difference]: With dead ends: 96 [2019-09-03 19:47:40,345 INFO L226 Difference]: Without dead ends: 91 [2019-09-03 19:47:40,346 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 152 SyntacticMatches, 26 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=248, Invalid=5604, Unknown=0, NotChecked=0, Total=5852 [2019-09-03 19:47:40,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-03 19:47:40,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-03 19:47:40,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-03 19:47:40,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 113 transitions. [2019-09-03 19:47:40,351 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 113 transitions. Word has length 154 [2019-09-03 19:47:40,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:40,352 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 113 transitions. [2019-09-03 19:47:40,352 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-03 19:47:40,352 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 113 transitions. [2019-09-03 19:47:40,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2019-09-03 19:47:40,353 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:40,353 INFO L399 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:40,354 INFO L418 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:40,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:40,354 INFO L82 PathProgramCache]: Analyzing trace with hash -2071453274, now seen corresponding path program 25 times [2019-09-03 19:47:40,354 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:40,354 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:40,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:40,355 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:47:40,355 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:40,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:41,855 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-03 19:47:41,856 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:41,856 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:41,865 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:47:41,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:41,924 WARN L254 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 253 conjunts are in the unsatisfiable core [2019-09-03 19:47:41,927 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:47:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1825 backedges. 0 proven. 925 refuted. 0 times theorem prover too weak. 900 trivial. 0 not checked. [2019-09-03 19:47:42,105 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:47:42,106 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2019-09-03 19:47:42,106 INFO L454 AbstractCegarLoop]: Interpolant automaton has 55 states [2019-09-03 19:47:42,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2019-09-03 19:47:42,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2837, Unknown=0, NotChecked=0, Total=2970 [2019-09-03 19:47:42,107 INFO L87 Difference]: Start difference. First operand 89 states and 113 transitions. Second operand 55 states. [2019-09-03 19:47:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:45,496 INFO L93 Difference]: Finished difference Result 99 states and 125 transitions. [2019-09-03 19:47:45,497 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-03 19:47:45,497 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 160 [2019-09-03 19:47:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:45,499 INFO L225 Difference]: With dead ends: 99 [2019-09-03 19:47:45,499 INFO L226 Difference]: Without dead ends: 94 [2019-09-03 19:47:45,500 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 158 SyntacticMatches, 27 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=258, Invalid=6062, Unknown=0, NotChecked=0, Total=6320 [2019-09-03 19:47:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2019-09-03 19:47:45,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2019-09-03 19:47:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2019-09-03 19:47:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 117 transitions. [2019-09-03 19:47:45,505 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 117 transitions. Word has length 160 [2019-09-03 19:47:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:45,506 INFO L475 AbstractCegarLoop]: Abstraction has 92 states and 117 transitions. [2019-09-03 19:47:45,506 INFO L476 AbstractCegarLoop]: Interpolant automaton has 55 states. [2019-09-03 19:47:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 117 transitions. [2019-09-03 19:47:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2019-09-03 19:47:45,507 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:45,507 INFO L399 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:45,507 INFO L418 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash 593443268, now seen corresponding path program 26 times [2019-09-03 19:47:45,508 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:45,508 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:45,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:45,509 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 19:47:45,509 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:45,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:47,203 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2019-09-03 19:47:47,203 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:47,203 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:47,215 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 19:47:47,276 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 19:47:47,276 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 19:47:47,280 WARN L254 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 263 conjunts are in the unsatisfiable core [2019-09-03 19:47:47,283 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 19:47:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 1976 backedges. 0 proven. 1001 refuted. 0 times theorem prover too weak. 975 trivial. 0 not checked. [2019-09-03 19:47:47,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 19:47:47,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2019-09-03 19:47:47,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 57 states [2019-09-03 19:47:47,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2019-09-03 19:47:47,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=3054, Unknown=0, NotChecked=0, Total=3192 [2019-09-03 19:47:47,500 INFO L87 Difference]: Start difference. First operand 92 states and 117 transitions. Second operand 57 states. [2019-09-03 19:47:51,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 19:47:51,187 INFO L93 Difference]: Finished difference Result 102 states and 129 transitions. [2019-09-03 19:47:51,187 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-03 19:47:51,187 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 166 [2019-09-03 19:47:51,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 19:47:51,189 INFO L225 Difference]: With dead ends: 102 [2019-09-03 19:47:51,189 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 19:47:51,190 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 164 SyntacticMatches, 28 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=268, Invalid=6538, Unknown=0, NotChecked=0, Total=6806 [2019-09-03 19:47:51,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 19:47:51,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2019-09-03 19:47:51,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2019-09-03 19:47:51,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 121 transitions. [2019-09-03 19:47:51,196 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 121 transitions. Word has length 166 [2019-09-03 19:47:51,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 19:47:51,196 INFO L475 AbstractCegarLoop]: Abstraction has 95 states and 121 transitions. [2019-09-03 19:47:51,196 INFO L476 AbstractCegarLoop]: Interpolant automaton has 57 states. [2019-09-03 19:47:51,197 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 121 transitions. [2019-09-03 19:47:51,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2019-09-03 19:47:51,198 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 19:47:51,198 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 19:47:51,198 INFO L418 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 19:47:51,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 19:47:51,198 INFO L82 PathProgramCache]: Analyzing trace with hash -847297694, now seen corresponding path program 27 times [2019-09-03 19:47:51,199 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 19:47:51,199 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 19:47:51,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:51,199 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 19:47:51,199 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 19:47:51,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 19:47:52,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2133 backedges. 0 proven. 1080 refuted. 0 times theorem prover too weak. 1053 trivial. 0 not checked. [2019-09-03 19:47:52,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 19:47:52,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 19:47:52,913 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2