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/loops-crafted-1/Mono5_1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-c6af20d [2019-09-03 20:05:25,330 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-03 20:05:25,332 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-03 20:05:25,344 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-03 20:05:25,353 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-03 20:05:25,354 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-03 20:05:25,355 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-03 20:05:25,356 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-03 20:05:25,357 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-03 20:05:25,358 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-03 20:05:25,360 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-03 20:05:25,362 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-03 20:05:25,364 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-03 20:05:25,365 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-03 20:05:25,367 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-03 20:05:25,367 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-03 20:05:25,370 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-03 20:05:25,379 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-03 20:05:25,380 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-03 20:05:25,381 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-03 20:05:25,382 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 20:05:25,411 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-03 20:05:25,412 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-03 20:05:25,414 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-03 20:05:25,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-03 20:05:25,415 INFO L138 SettingsManager]: * Use SBE=true [2019-09-03 20:05:25,415 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-03 20:05:25,415 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-03 20:05:25,415 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-03 20:05:25,416 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-03 20:05:25,417 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-03 20:05:25,417 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-03 20:05:25,417 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-03 20:05:25,417 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-03 20:05:25,417 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-03 20:05:25,418 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-03 20:05:25,418 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-03 20:05:25,418 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-03 20:05:25,420 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-03 20:05:25,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-03 20:05:25,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-03 20:05:25,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-03 20:05:25,421 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-03 20:05:25,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-03 20:05:25,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-03 20:05:25,467 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-03 20:05:25,478 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-03 20:05:25,481 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-03 20:05:25,482 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-03 20:05:25,483 INFO L275 PluginConnector]: CDTParser initialized [2019-09-03 20:05:25,483 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2019-09-03 20:05:25,541 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95afe3ec4/01a3b772709040c888a27404c4236f44/FLAG86d9c056f [2019-09-03 20:05:25,927 INFO L306 CDTParser]: Found 1 translation units. [2019-09-03 20:05:25,928 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono5_1.c [2019-09-03 20:05:25,933 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95afe3ec4/01a3b772709040c888a27404c4236f44/FLAG86d9c056f [2019-09-03 20:05:26,321 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/95afe3ec4/01a3b772709040c888a27404c4236f44 [2019-09-03 20:05:26,332 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-03 20:05:26,334 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-03 20:05:26,335 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-03 20:05:26,335 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-03 20:05:26,339 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-03 20:05:26,340 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@25d452d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26, skipping insertion in model container [2019-09-03 20:05:26,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,351 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-03 20:05:26,368 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-03 20:05:26,575 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:05:26,580 INFO L188 MainTranslator]: Completed pre-run [2019-09-03 20:05:26,596 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-03 20:05:26,614 INFO L192 MainTranslator]: Completed translation [2019-09-03 20:05:26,615 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26 WrapperNode [2019-09-03 20:05:26,615 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-03 20:05:26,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-03 20:05:26,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-03 20:05:26,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-03 20:05:26,714 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,714 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,720 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,722 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,727 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,732 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,733 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (1/1) ... [2019-09-03 20:05:26,734 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-03 20:05:26,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-03 20:05:26,735 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-03 20:05:26,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-03 20:05:26,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (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 20:05:26,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-03 20:05:26,803 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-03 20:05:26,803 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2019-09-03 20:05:26,803 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-03 20:05:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-03 20:05:26,803 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2019-09-03 20:05:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-03 20:05:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-03 20:05:26,804 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-03 20:05:27,015 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-03 20:05:27,015 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-03 20:05:27,017 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:05:27 BoogieIcfgContainer [2019-09-03 20:05:27,017 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-03 20:05:27,019 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-03 20:05:27,019 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-03 20:05:27,022 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-03 20:05:27,022 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.09 08:05:26" (1/3) ... [2019-09-03 20:05:27,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fccb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:05:27, skipping insertion in model container [2019-09-03 20:05:27,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.09 08:05:26" (2/3) ... [2019-09-03 20:05:27,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39fccb1d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.09 08:05:27, skipping insertion in model container [2019-09-03 20:05:27,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.09 08:05:27" (3/3) ... [2019-09-03 20:05:27,026 INFO L109 eAbstractionObserver]: Analyzing ICFG Mono5_1.c [2019-09-03 20:05:27,036 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-03 20:05:27,042 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-03 20:05:27,058 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-03 20:05:27,090 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-03 20:05:27,091 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-03 20:05:27,091 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-03 20:05:27,091 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-03 20:05:27,092 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-03 20:05:27,092 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-03 20:05:27,092 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-03 20:05:27,092 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-03 20:05:27,093 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-03 20:05:27,117 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states. [2019-09-03 20:05:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:05:27,124 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,124 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,126 INFO L418 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1713253442, now seen corresponding path program 1 times [2019-09-03 20:05:27,134 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,135 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,177 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:27,177 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:27,233 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 20:05:27,235 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:05:27,236 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-03 20:05:27,240 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-03 20:05:27,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-03 20:05:27,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-03 20:05:27,254 INFO L87 Difference]: Start difference. First operand 19 states. Second operand 2 states. [2019-09-03 20:05:27,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:27,276 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-03 20:05:27,276 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-03 20:05:27,277 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 10 [2019-09-03 20:05:27,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:27,285 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:05:27,286 INFO L226 Difference]: Without dead ends: 13 [2019-09-03 20:05:27,289 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 20:05:27,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2019-09-03 20:05:27,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2019-09-03 20:05:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2019-09-03 20:05:27,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2019-09-03 20:05:27,324 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 10 [2019-09-03 20:05:27,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:27,324 INFO L475 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2019-09-03 20:05:27,325 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-03 20:05:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2019-09-03 20:05:27,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-09-03 20:05:27,325 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,326 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,326 INFO L418 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1703094711, now seen corresponding path program 1 times [2019-09-03 20:05:27,327 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,327 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,328 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:27,328 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:27,504 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 20:05:27,505 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:05:27,505 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-09-03 20:05:27,507 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:05:27,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:05:27,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:05:27,508 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand 5 states. [2019-09-03 20:05:27,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:27,581 INFO L93 Difference]: Finished difference Result 21 states and 23 transitions. [2019-09-03 20:05:27,581 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:05:27,582 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 10 [2019-09-03 20:05:27,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:27,582 INFO L225 Difference]: With dead ends: 21 [2019-09-03 20:05:27,583 INFO L226 Difference]: Without dead ends: 16 [2019-09-03 20:05:27,584 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:05:27,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2019-09-03 20:05:27,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2019-09-03 20:05:27,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2019-09-03 20:05:27,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2019-09-03 20:05:27,588 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 10 [2019-09-03 20:05:27,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:27,589 INFO L475 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2019-09-03 20:05:27,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:05:27,589 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2019-09-03 20:05:27,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2019-09-03 20:05:27,590 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,590 INFO L399 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,590 INFO L418 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1264308876, now seen corresponding path program 1 times [2019-09-03 20:05:27,591 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,591 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,592 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:27,592 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:27,669 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-03 20:05:27,670 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-03 20:05:27,670 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-03 20:05:27,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-03 20:05:27,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-03 20:05:27,671 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand 3 states. [2019-09-03 20:05:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:27,692 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2019-09-03 20:05:27,692 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-03 20:05:27,693 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 13 [2019-09-03 20:05:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:27,694 INFO L225 Difference]: With dead ends: 27 [2019-09-03 20:05:27,694 INFO L226 Difference]: Without dead ends: 19 [2019-09-03 20:05:27,694 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 2 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 20:05:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2019-09-03 20:05:27,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2019-09-03 20:05:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-09-03 20:05:27,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2019-09-03 20:05:27,700 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 13 [2019-09-03 20:05:27,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:27,700 INFO L475 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2019-09-03 20:05:27,700 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-03 20:05:27,700 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2019-09-03 20:05:27,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-09-03 20:05:27,701 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,702 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,702 INFO L418 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -265742635, now seen corresponding path program 1 times [2019-09-03 20:05:27,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,703 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,704 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:27,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:27,798 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:27,799 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 20:05:27,815 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 20:05:27,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:27,834 INFO L256 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-03 20:05:27,839 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:27,885 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:27,885 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-03 20:05:27,885 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-03 20:05:27,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-03 20:05:27,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:05:27,886 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand 5 states. [2019-09-03 20:05:27,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:27,931 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2019-09-03 20:05:27,931 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-03 20:05:27,931 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2019-09-03 20:05:27,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:27,932 INFO L225 Difference]: With dead ends: 30 [2019-09-03 20:05:27,932 INFO L226 Difference]: Without dead ends: 22 [2019-09-03 20:05:27,933 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-09-03 20:05:27,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-09-03 20:05:27,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2019-09-03 20:05:27,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2019-09-03 20:05:27,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2019-09-03 20:05:27,938 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 16 [2019-09-03 20:05:27,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:27,939 INFO L475 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2019-09-03 20:05:27,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-03 20:05:27,939 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2019-09-03 20:05:27,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2019-09-03 20:05:27,940 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:27,940 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:27,940 INFO L418 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:27,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:27,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1077650900, now seen corresponding path program 2 times [2019-09-03 20:05:27,941 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:27,941 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:27,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:27,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:28,065 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:28,066 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:28,066 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) [2019-09-03 20:05:28,079 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:28,099 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:28,099 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:28,100 INFO L256 TraceCheckSpWp]: Trace formula consists of 40 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-03 20:05:28,102 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:28,132 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:28,136 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:28,136 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-03 20:05:28,136 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-03 20:05:28,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-03 20:05:28,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:05:28,137 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand 6 states. [2019-09-03 20:05:28,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:28,197 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2019-09-03 20:05:28,197 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-03 20:05:28,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 19 [2019-09-03 20:05:28,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:28,199 INFO L225 Difference]: With dead ends: 33 [2019-09-03 20:05:28,199 INFO L226 Difference]: Without dead ends: 25 [2019-09-03 20:05:28,200 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-03 20:05:28,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2019-09-03 20:05:28,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2019-09-03 20:05:28,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2019-09-03 20:05:28,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2019-09-03 20:05:28,205 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 19 [2019-09-03 20:05:28,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:28,207 INFO L475 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2019-09-03 20:05:28,208 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-03 20:05:28,208 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2019-09-03 20:05:28,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2019-09-03 20:05:28,209 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:28,209 INFO L399 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:28,210 INFO L418 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:28,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:28,211 INFO L82 PathProgramCache]: Analyzing trace with hash 1609187957, now seen corresponding path program 3 times [2019-09-03 20:05:28,211 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:28,211 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:28,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:28,213 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:28,213 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:28,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:28,401 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:28,401 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:28,402 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:28,427 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:05:28,443 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-03 20:05:28,444 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:28,445 INFO L256 TraceCheckSpWp]: Trace formula consists of 32 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-03 20:05:28,447 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:28,497 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:05:28,500 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:28,501 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2019-09-03 20:05:28,501 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:05:28,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:05:28,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:05:28,502 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand 10 states. [2019-09-03 20:05:28,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:28,704 INFO L93 Difference]: Finished difference Result 42 states and 48 transitions. [2019-09-03 20:05:28,706 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-09-03 20:05:28,707 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 22 [2019-09-03 20:05:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:28,708 INFO L225 Difference]: With dead ends: 42 [2019-09-03 20:05:28,708 INFO L226 Difference]: Without dead ends: 31 [2019-09-03 20:05:28,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:05:28,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2019-09-03 20:05:28,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2019-09-03 20:05:28,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2019-09-03 20:05:28,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2019-09-03 20:05:28,720 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 22 [2019-09-03 20:05:28,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:28,720 INFO L475 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2019-09-03 20:05:28,721 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:05:28,721 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2019-09-03 20:05:28,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2019-09-03 20:05:28,722 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:28,722 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:28,722 INFO L418 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:28,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:28,723 INFO L82 PathProgramCache]: Analyzing trace with hash 238113751, now seen corresponding path program 4 times [2019-09-03 20:05:28,723 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:28,723 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:28,731 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:28,732 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:28,732 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:28,909 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:05:28,910 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:28,910 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 20:05:28,932 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 20:05:28,949 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:05:28,950 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:28,951 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-03 20:05:28,953 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:28,982 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:05:28,986 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:28,986 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2019-09-03 20:05:28,987 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-03 20:05:28,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-03 20:05:28,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:05:28,988 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 8 states. [2019-09-03 20:05:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:29,087 INFO L93 Difference]: Finished difference Result 45 states and 51 transitions. [2019-09-03 20:05:29,088 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-03 20:05:29,088 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2019-09-03 20:05:29,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:29,089 INFO L225 Difference]: With dead ends: 45 [2019-09-03 20:05:29,089 INFO L226 Difference]: Without dead ends: 34 [2019-09-03 20:05:29,092 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2019-09-03 20:05:29,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-03 20:05:29,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-03 20:05:29,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-03 20:05:29,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2019-09-03 20:05:29,101 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 28 [2019-09-03 20:05:29,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:29,102 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2019-09-03 20:05:29,102 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-03 20:05:29,102 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2019-09-03 20:05:29,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2019-09-03 20:05:29,103 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:29,104 INFO L399 BasicCegarLoop]: trace histogram [7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:29,105 INFO L418 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:29,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:29,105 INFO L82 PathProgramCache]: Analyzing trace with hash 358767702, now seen corresponding path program 5 times [2019-09-03 20:05:29,105 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:29,105 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:29,107 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:29,107 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:29,283 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 28 proven. 40 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:05:29,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:29,284 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) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:29,299 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:05:31,565 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2019-09-03 20:05:31,566 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:31,603 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-03 20:05:31,605 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:31,645 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-03 20:05:31,650 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:31,651 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2019-09-03 20:05:31,651 INFO L454 AbstractCegarLoop]: Interpolant automaton has 10 states [2019-09-03 20:05:31,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2019-09-03 20:05:31,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:05:31,652 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 10 states. [2019-09-03 20:05:31,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:31,819 INFO L93 Difference]: Finished difference Result 51 states and 58 transitions. [2019-09-03 20:05:31,820 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2019-09-03 20:05:31,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2019-09-03 20:05:31,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:31,821 INFO L225 Difference]: With dead ends: 51 [2019-09-03 20:05:31,821 INFO L226 Difference]: Without dead ends: 40 [2019-09-03 20:05:31,822 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 3 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2019-09-03 20:05:31,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-03 20:05:31,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-03 20:05:31,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-03 20:05:31,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 42 transitions. [2019-09-03 20:05:31,827 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 42 transitions. Word has length 31 [2019-09-03 20:05:31,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:31,828 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 42 transitions. [2019-09-03 20:05:31,828 INFO L476 AbstractCegarLoop]: Interpolant automaton has 10 states. [2019-09-03 20:05:31,828 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 42 transitions. [2019-09-03 20:05:31,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-09-03 20:05:31,829 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:31,829 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:31,830 INFO L418 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:31,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:31,830 INFO L82 PathProgramCache]: Analyzing trace with hash -2031059786, now seen corresponding path program 6 times [2019-09-03 20:05:31,830 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:31,830 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:31,831 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:31,831 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:31,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 38 proven. 77 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-09-03 20:05:32,010 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:32,010 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) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:32,034 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:05:32,081 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-03 20:05:32,081 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:32,082 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-03 20:05:32,084 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-03 20:05:32,161 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:32,161 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 7] total 15 [2019-09-03 20:05:32,162 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:05:32,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:05:32,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:05:32,163 INFO L87 Difference]: Start difference. First operand 39 states and 42 transitions. Second operand 15 states. [2019-09-03 20:05:32,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:32,538 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2019-09-03 20:05:32,538 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:05:32,538 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 37 [2019-09-03 20:05:32,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:32,539 INFO L225 Difference]: With dead ends: 60 [2019-09-03 20:05:32,539 INFO L226 Difference]: Without dead ends: 46 [2019-09-03 20:05:32,540 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2019-09-03 20:05:32,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2019-09-03 20:05:32,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2019-09-03 20:05:32,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2019-09-03 20:05:32,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2019-09-03 20:05:32,546 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 37 [2019-09-03 20:05:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:32,547 INFO L475 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2019-09-03 20:05:32,547 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:05:32,547 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2019-09-03 20:05:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2019-09-03 20:05:32,548 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:32,548 INFO L399 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:32,549 INFO L418 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash -692664300, now seen corresponding path program 7 times [2019-09-03 20:05:32,549 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:32,549 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:32,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:32,550 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:32,550 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:32,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:32,743 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:32,743 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:32,744 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 20:05:32,772 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:32,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:32,793 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-03 20:05:32,795 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:32,843 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 69 proven. 100 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:32,847 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:32,847 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2019-09-03 20:05:32,848 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-03 20:05:32,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-03 20:05:32,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:05:32,854 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 12 states. [2019-09-03 20:05:33,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:33,068 INFO L93 Difference]: Finished difference Result 63 states and 71 transitions. [2019-09-03 20:05:33,071 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-03 20:05:33,072 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2019-09-03 20:05:33,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:33,073 INFO L225 Difference]: With dead ends: 63 [2019-09-03 20:05:33,075 INFO L226 Difference]: Without dead ends: 49 [2019-09-03 20:05:33,076 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 42 SyntacticMatches, 3 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2019-09-03 20:05:33,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-03 20:05:33,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2019-09-03 20:05:33,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2019-09-03 20:05:33,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2019-09-03 20:05:33,089 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 43 [2019-09-03 20:05:33,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:33,089 INFO L475 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2019-09-03 20:05:33,089 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-03 20:05:33,090 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2019-09-03 20:05:33,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-03 20:05:33,091 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:33,091 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:33,092 INFO L418 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:33,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:33,092 INFO L82 PathProgramCache]: Analyzing trace with hash -575549003, now seen corresponding path program 8 times [2019-09-03 20:05:33,093 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:33,093 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:33,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:33,094 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:05:33,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:33,335 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:33,335 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:33,336 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:05:33,355 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:33,379 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:05:33,379 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:33,380 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-03 20:05:33,385 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:33,442 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 77 proven. 126 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:33,446 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:33,446 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2019-09-03 20:05:33,446 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-03 20:05:33,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-03 20:05:33,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:05:33,447 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 13 states. [2019-09-03 20:05:33,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:33,684 INFO L93 Difference]: Finished difference Result 66 states and 74 transitions. [2019-09-03 20:05:33,684 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-03 20:05:33,684 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 46 [2019-09-03 20:05:33,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:33,685 INFO L225 Difference]: With dead ends: 66 [2019-09-03 20:05:33,686 INFO L226 Difference]: Without dead ends: 52 [2019-09-03 20:05:33,688 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2019-09-03 20:05:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-09-03 20:05:33,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2019-09-03 20:05:33,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-03 20:05:33,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-03 20:05:33,698 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 46 [2019-09-03 20:05:33,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:33,698 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-03 20:05:33,698 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-03 20:05:33,698 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-03 20:05:33,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2019-09-03 20:05:33,699 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:33,699 INFO L399 BasicCegarLoop]: trace histogram [13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:33,700 INFO L418 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:33,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:33,700 INFO L82 PathProgramCache]: Analyzing trace with hash 892819572, now seen corresponding path program 9 times [2019-09-03 20:05:33,702 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:33,702 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:33,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:33,704 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:33,704 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:33,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:33,926 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 85 proven. 155 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:05:33,926 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:33,926 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 20:05:33,940 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:05:33,989 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-03 20:05:33,990 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:33,991 INFO L256 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-03 20:05:33,993 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2019-09-03 20:05:34,134 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:34,134 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8] total 19 [2019-09-03 20:05:34,134 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:05:34,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:05:34,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:05:34,135 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 19 states. [2019-09-03 20:05:34,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:34,797 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2019-09-03 20:05:34,798 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-03 20:05:34,798 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 49 [2019-09-03 20:05:34,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:34,799 INFO L225 Difference]: With dead ends: 75 [2019-09-03 20:05:34,799 INFO L226 Difference]: Without dead ends: 58 [2019-09-03 20:05:34,800 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2019-09-03 20:05:34,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2019-09-03 20:05:34,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2019-09-03 20:05:34,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2019-09-03 20:05:34,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2019-09-03 20:05:34,806 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 49 [2019-09-03 20:05:34,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:34,807 INFO L475 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2019-09-03 20:05:34,807 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:05:34,807 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2019-09-03 20:05:34,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2019-09-03 20:05:34,808 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:34,808 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 11, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:34,808 INFO L418 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:34,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:34,809 INFO L82 PathProgramCache]: Analyzing trace with hash 1212048662, now seen corresponding path program 10 times [2019-09-03 20:05:34,809 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:34,809 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:34,810 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:34,810 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:34,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:35,003 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:05:35,003 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:35,004 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:05:35,021 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:05:35,035 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:05:35,036 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:05:35,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-03 20:05:35,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:05:35,106 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 128 proven. 187 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:05:35,110 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:05:35,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-03 20:05:35,111 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-03 20:05:35,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-03 20:05:35,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:05:35,112 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand 15 states. [2019-09-03 20:05:35,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:05:35,469 INFO L93 Difference]: Finished difference Result 78 states and 88 transitions. [2019-09-03 20:05:35,469 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-03 20:05:35,469 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2019-09-03 20:05:35,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:05:35,470 INFO L225 Difference]: With dead ends: 78 [2019-09-03 20:05:35,471 INFO L226 Difference]: Without dead ends: 61 [2019-09-03 20:05:35,471 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 54 SyntacticMatches, 3 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2019-09-03 20:05:35,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-03 20:05:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2019-09-03 20:05:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2019-09-03 20:05:35,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2019-09-03 20:05:35,477 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 55 [2019-09-03 20:05:35,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:05:35,478 INFO L475 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2019-09-03 20:05:35,478 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-03 20:05:35,478 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2019-09-03 20:05:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-09-03 20:05:35,479 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:05:35,479 INFO L399 BasicCegarLoop]: trace histogram [16, 16, 12, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:05:35,479 INFO L418 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:05:35,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:05:35,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1247479095, now seen corresponding path program 11 times [2019-09-03 20:05:35,480 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:05:35,480 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:05:35,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:35,481 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:05:35,481 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:05:35,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:05:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 139 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:05:35,687 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:05:35,687 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 20:05:35,697 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:07:59,708 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2019-09-03 20:07:59,709 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:07:59,822 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-03 20:07:59,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:07:59,876 INFO L134 CoverageAnalysis]: Checked inductivity of 376 backedges. 139 proven. 222 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:07:59,882 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:07:59,882 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2019-09-03 20:07:59,882 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-03 20:07:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-03 20:07:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:07:59,884 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 16 states. [2019-09-03 20:08:00,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:00,295 INFO L93 Difference]: Finished difference Result 81 states and 91 transitions. [2019-09-03 20:08:00,297 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-09-03 20:08:00,297 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2019-09-03 20:08:00,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:00,298 INFO L225 Difference]: With dead ends: 81 [2019-09-03 20:08:00,298 INFO L226 Difference]: Without dead ends: 64 [2019-09-03 20:08:00,299 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2019-09-03 20:08:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2019-09-03 20:08:00,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2019-09-03 20:08:00,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-03 20:08:00,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 68 transitions. [2019-09-03 20:08:00,305 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 68 transitions. Word has length 58 [2019-09-03 20:08:00,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:00,305 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 68 transitions. [2019-09-03 20:08:00,305 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-03 20:08:00,305 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 68 transitions. [2019-09-03 20:08:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2019-09-03 20:08:00,306 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:00,306 INFO L399 BasicCegarLoop]: trace histogram [17, 17, 13, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:00,307 INFO L418 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:00,307 INFO L82 PathProgramCache]: Analyzing trace with hash 193553782, now seen corresponding path program 12 times [2019-09-03 20:08:00,307 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:00,307 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:00,308 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:00,308 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:00,538 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 150 proven. 260 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-03 20:08:00,539 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:00,539 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:08:00,555 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:08:16,202 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2019-09-03 20:08:16,202 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:16,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-03 20:08:16,664 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:16,800 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2019-09-03 20:08:16,805 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:08:16,805 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 23 [2019-09-03 20:08:16,805 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-03 20:08:16,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-03 20:08:16,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2019-09-03 20:08:16,806 INFO L87 Difference]: Start difference. First operand 63 states and 68 transitions. Second operand 23 states. [2019-09-03 20:08:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:17,726 INFO L93 Difference]: Finished difference Result 90 states and 102 transitions. [2019-09-03 20:08:17,726 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-03 20:08:17,726 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2019-09-03 20:08:17,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:17,727 INFO L225 Difference]: With dead ends: 90 [2019-09-03 20:08:17,727 INFO L226 Difference]: Without dead ends: 70 [2019-09-03 20:08:17,728 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:08:17,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2019-09-03 20:08:17,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2019-09-03 20:08:17,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2019-09-03 20:08:17,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 75 transitions. [2019-09-03 20:08:17,734 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 75 transitions. Word has length 61 [2019-09-03 20:08:17,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:17,735 INFO L475 AbstractCegarLoop]: Abstraction has 69 states and 75 transitions. [2019-09-03 20:08:17,735 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-03 20:08:17,735 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 75 transitions. [2019-09-03 20:08:17,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2019-09-03 20:08:17,736 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:17,736 INFO L399 BasicCegarLoop]: trace histogram [19, 19, 14, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:17,737 INFO L418 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:17,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:17,737 INFO L82 PathProgramCache]: Analyzing trace with hash 630577748, now seen corresponding path program 13 times [2019-09-03 20:08:17,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:17,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:17,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:17,738 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:17,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:17,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:18,007 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:08:18,008 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:18,008 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 20:08:18,030 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:18,050 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-03 20:08:18,052 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:18,092 INFO L134 CoverageAnalysis]: Checked inductivity of 532 backedges. 205 proven. 301 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:08:18,099 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:08:18,100 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2019-09-03 20:08:18,100 INFO L454 AbstractCegarLoop]: Interpolant automaton has 18 states [2019-09-03 20:08:18,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2019-09-03 20:08:18,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:08:18,101 INFO L87 Difference]: Start difference. First operand 69 states and 75 transitions. Second operand 18 states. [2019-09-03 20:08:18,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:18,517 INFO L93 Difference]: Finished difference Result 93 states and 105 transitions. [2019-09-03 20:08:18,520 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2019-09-03 20:08:18,520 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 67 [2019-09-03 20:08:18,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:18,521 INFO L225 Difference]: With dead ends: 93 [2019-09-03 20:08:18,522 INFO L226 Difference]: Without dead ends: 73 [2019-09-03 20:08:18,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2019-09-03 20:08:18,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-03 20:08:18,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2019-09-03 20:08:18,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2019-09-03 20:08:18,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2019-09-03 20:08:18,536 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 67 [2019-09-03 20:08:18,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:18,536 INFO L475 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2019-09-03 20:08:18,537 INFO L476 AbstractCegarLoop]: Interpolant automaton has 18 states. [2019-09-03 20:08:18,537 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2019-09-03 20:08:18,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2019-09-03 20:08:18,541 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:18,541 INFO L399 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:18,541 INFO L418 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:18,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:18,542 INFO L82 PathProgramCache]: Analyzing trace with hash -2136583947, now seen corresponding path program 14 times [2019-09-03 20:08:18,542 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:18,542 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:18,543 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:18,543 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:08:18,546 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:18,868 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 219 proven. 345 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:08:18,868 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:18,869 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 20:08:18,891 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 20:08:18,915 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:08:18,916 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:18,917 INFO L256 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 33 conjunts are in the unsatisfiable core [2019-09-03 20:08:18,919 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:18,966 INFO L134 CoverageAnalysis]: Checked inductivity of 590 backedges. 219 proven. 345 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:08:18,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:08:18,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2019-09-03 20:08:18,979 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-03 20:08:18,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-03 20:08:18,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:08:18,980 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 19 states. [2019-09-03 20:08:19,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:19,507 INFO L93 Difference]: Finished difference Result 96 states and 108 transitions. [2019-09-03 20:08:19,508 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2019-09-03 20:08:19,508 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 70 [2019-09-03 20:08:19,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:19,509 INFO L225 Difference]: With dead ends: 96 [2019-09-03 20:08:19,509 INFO L226 Difference]: Without dead ends: 76 [2019-09-03 20:08:19,510 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 69 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2019-09-03 20:08:19,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2019-09-03 20:08:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2019-09-03 20:08:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-03 20:08:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2019-09-03 20:08:19,515 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 70 [2019-09-03 20:08:19,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:19,515 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2019-09-03 20:08:19,515 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-03 20:08:19,515 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2019-09-03 20:08:19,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2019-09-03 20:08:19,517 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:19,517 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 16, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:19,518 INFO L418 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:19,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:19,518 INFO L82 PathProgramCache]: Analyzing trace with hash -1048360268, now seen corresponding path program 15 times [2019-09-03 20:08:19,518 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:19,518 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:19,519 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:19,519 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:19,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:19,802 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 233 proven. 392 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2019-09-03 20:08:19,802 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:19,802 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:08:19,814 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:08:24,633 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2019-09-03 20:08:24,633 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:24,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-03 20:08:24,636 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:24,803 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 259 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2019-09-03 20:08:24,808 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:08:24,809 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2019-09-03 20:08:24,809 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:08:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:08:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=635, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:08:24,810 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 27 states. [2019-09-03 20:08:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:26,220 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2019-09-03 20:08:26,220 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:08:26,220 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 73 [2019-09-03 20:08:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:26,221 INFO L225 Difference]: With dead ends: 105 [2019-09-03 20:08:26,221 INFO L226 Difference]: Without dead ends: 82 [2019-09-03 20:08:26,222 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=171, Invalid=1809, Unknown=0, NotChecked=0, Total=1980 [2019-09-03 20:08:26,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2019-09-03 20:08:26,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2019-09-03 20:08:26,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2019-09-03 20:08:26,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 88 transitions. [2019-09-03 20:08:26,239 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 88 transitions. Word has length 73 [2019-09-03 20:08:26,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:26,239 INFO L475 AbstractCegarLoop]: Abstraction has 81 states and 88 transitions. [2019-09-03 20:08:26,239 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:08:26,239 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 88 transitions. [2019-09-03 20:08:26,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2019-09-03 20:08:26,240 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:26,240 INFO L399 BasicCegarLoop]: trace histogram [23, 23, 17, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:26,240 INFO L418 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:26,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:26,241 INFO L82 PathProgramCache]: Analyzing trace with hash 2061991382, now seen corresponding path program 16 times [2019-09-03 20:08:26,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:26,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:26,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:26,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:26,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:26,608 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 300 proven. 442 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:08:26,608 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:26,609 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-03 20:08:26,634 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-03 20:08:26,667 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:08:26,668 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:08:26,669 INFO L256 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-03 20:08:26,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:08:26,736 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 300 proven. 442 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:08:26,748 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:08:26,749 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2019-09-03 20:08:26,750 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-03 20:08:26,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-03 20:08:26,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:08:26,751 INFO L87 Difference]: Start difference. First operand 81 states and 88 transitions. Second operand 21 states. [2019-09-03 20:08:27,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:08:27,445 INFO L93 Difference]: Finished difference Result 108 states and 122 transitions. [2019-09-03 20:08:27,445 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-03 20:08:27,445 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 79 [2019-09-03 20:08:27,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:08:27,446 INFO L225 Difference]: With dead ends: 108 [2019-09-03 20:08:27,447 INFO L226 Difference]: Without dead ends: 85 [2019-09-03 20:08:27,448 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2019-09-03 20:08:27,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-03 20:08:27,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2019-09-03 20:08:27,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2019-09-03 20:08:27,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 91 transitions. [2019-09-03 20:08:27,453 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 91 transitions. Word has length 79 [2019-09-03 20:08:27,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:08:27,453 INFO L475 AbstractCegarLoop]: Abstraction has 84 states and 91 transitions. [2019-09-03 20:08:27,453 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-03 20:08:27,454 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 91 transitions. [2019-09-03 20:08:27,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2019-09-03 20:08:27,454 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:08:27,455 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 18, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:08:27,455 INFO L418 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:08:27,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:08:27,455 INFO L82 PathProgramCache]: Analyzing trace with hash 593365751, now seen corresponding path program 17 times [2019-09-03 20:08:27,455 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:08:27,455 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:08:27,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:27,456 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:08:27,456 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:08:27,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:08:27,768 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 317 proven. 495 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:08:27,769 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:08:27,769 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 20:08:27,780 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-03 20:12:41,930 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2019-09-03 20:12:41,930 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:12:44,231 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 45 conjunts are in the unsatisfiable core [2019-09-03 20:12:44,233 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:12:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 852 backedges. 173 proven. 672 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2019-09-03 20:12:44,395 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:12:44,395 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24] total 25 [2019-09-03 20:12:44,396 INFO L454 AbstractCegarLoop]: Interpolant automaton has 25 states [2019-09-03 20:12:44,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2019-09-03 20:12:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:12:44,397 INFO L87 Difference]: Start difference. First operand 84 states and 91 transitions. Second operand 25 states. [2019-09-03 20:12:45,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:12:45,358 INFO L93 Difference]: Finished difference Result 120 states and 137 transitions. [2019-09-03 20:12:45,358 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2019-09-03 20:12:45,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 82 [2019-09-03 20:12:45,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:12:45,359 INFO L225 Difference]: With dead ends: 120 [2019-09-03 20:12:45,359 INFO L226 Difference]: Without dead ends: 97 [2019-09-03 20:12:45,360 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2019-09-03 20:12:45,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2019-09-03 20:12:45,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2019-09-03 20:12:45,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2019-09-03 20:12:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2019-09-03 20:12:45,366 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 82 [2019-09-03 20:12:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:12:45,366 INFO L475 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2019-09-03 20:12:45,367 INFO L476 AbstractCegarLoop]: Interpolant automaton has 25 states. [2019-09-03 20:12:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2019-09-03 20:12:45,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2019-09-03 20:12:45,368 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:12:45,368 INFO L399 BasicCegarLoop]: trace histogram [28, 28, 22, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:12:45,368 INFO L418 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:12:45,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:12:45,368 INFO L82 PathProgramCache]: Analyzing trace with hash -174826953, now seen corresponding path program 18 times [2019-09-03 20:12:45,369 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:12:45,369 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:12:45,369 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:45,369 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:12:45,370 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:12:45,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:12:45,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 385 proven. 737 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2019-09-03 20:12:45,819 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:12:45,819 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 20:12:45,829 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-03 20:15:01,033 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2019-09-03 20:15:01,033 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:01,092 INFO L256 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-03 20:15:01,093 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2019-09-03 20:15:01,325 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:01,325 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 11] total 34 [2019-09-03 20:15:01,325 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-03 20:15:01,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-03 20:15:01,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1035, Unknown=0, NotChecked=0, Total=1122 [2019-09-03 20:15:01,326 INFO L87 Difference]: Start difference. First operand 96 states and 103 transitions. Second operand 34 states. [2019-09-03 20:15:03,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:03,434 INFO L93 Difference]: Finished difference Result 129 states and 145 transitions. [2019-09-03 20:15:03,434 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-03 20:15:03,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 94 [2019-09-03 20:15:03,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:03,436 INFO L225 Difference]: With dead ends: 129 [2019-09-03 20:15:03,436 INFO L226 Difference]: Without dead ends: 103 [2019-09-03 20:15:03,438 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=227, Invalid=3079, Unknown=0, NotChecked=0, Total=3306 [2019-09-03 20:15:03,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-03 20:15:03,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2019-09-03 20:15:03,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2019-09-03 20:15:03,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2019-09-03 20:15:03,444 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 94 [2019-09-03 20:15:03,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:03,444 INFO L475 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2019-09-03 20:15:03,444 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-03 20:15:03,444 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2019-09-03 20:15:03,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2019-09-03 20:15:03,445 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:03,445 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 23, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:03,445 INFO L418 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:03,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:03,446 INFO L82 PathProgramCache]: Analyzing trace with hash 113447893, now seen corresponding path program 19 times [2019-09-03 20:15:03,446 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:03,446 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:03,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:03,447 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:03,447 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:03,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 473 proven. 805 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-03 20:15:03,902 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:15:03,902 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 20:15:03,912 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:15:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:03,938 INFO L256 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 49 conjunts are in the unsatisfiable core [2019-09-03 20:15:03,939 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:03,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1335 backedges. 473 proven. 805 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-03 20:15:03,989 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:03,989 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-03 20:15:03,990 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-03 20:15:03,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-03 20:15:03,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:15:03,990 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 27 states. [2019-09-03 20:15:05,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:05,166 INFO L93 Difference]: Finished difference Result 132 states and 148 transitions. [2019-09-03 20:15:05,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-03 20:15:05,168 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 100 [2019-09-03 20:15:05,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:05,169 INFO L225 Difference]: With dead ends: 132 [2019-09-03 20:15:05,169 INFO L226 Difference]: Without dead ends: 106 [2019-09-03 20:15:05,172 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 99 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2019-09-03 20:15:05,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2019-09-03 20:15:05,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2019-09-03 20:15:05,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-03 20:15:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 113 transitions. [2019-09-03 20:15:05,178 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 113 transitions. Word has length 100 [2019-09-03 20:15:05,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:05,178 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 113 transitions. [2019-09-03 20:15:05,178 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-03 20:15:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 113 transitions. [2019-09-03 20:15:05,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-03 20:15:05,179 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:05,179 INFO L399 BasicCegarLoop]: trace histogram [31, 31, 24, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:05,180 INFO L418 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:05,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:05,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1662235988, now seen corresponding path program 20 times [2019-09-03 20:15:05,180 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:05,180 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:05,181 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:05,182 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-03 20:15:05,182 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:05,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 493 proven. 876 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-03 20:15:05,658 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:15:05,658 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 20:15:05,668 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-03 20:15:05,696 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-03 20:15:05,697 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:05,698 INFO L256 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 51 conjunts are in the unsatisfiable core [2019-09-03 20:15:05,699 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:05,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1426 backedges. 493 proven. 876 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (21)] Exception during sending of exit command (exit): Broken pipe [2019-09-03 20:15:05,758 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:05,758 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2019-09-03 20:15:05,758 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-03 20:15:05,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-03 20:15:05,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:15:05,759 INFO L87 Difference]: Start difference. First operand 105 states and 113 transitions. Second operand 28 states. [2019-09-03 20:15:07,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:07,053 INFO L93 Difference]: Finished difference Result 135 states and 151 transitions. [2019-09-03 20:15:07,053 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2019-09-03 20:15:07,054 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 103 [2019-09-03 20:15:07,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:07,055 INFO L225 Difference]: With dead ends: 135 [2019-09-03 20:15:07,055 INFO L226 Difference]: Without dead ends: 109 [2019-09-03 20:15:07,056 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 102 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2019-09-03 20:15:07,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2019-09-03 20:15:07,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2019-09-03 20:15:07,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2019-09-03 20:15:07,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2019-09-03 20:15:07,072 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 103 [2019-09-03 20:15:07,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:07,072 INFO L475 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2019-09-03 20:15:07,073 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-03 20:15:07,073 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2019-09-03 20:15:07,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2019-09-03 20:15:07,074 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:07,075 INFO L399 BasicCegarLoop]: trace histogram [32, 32, 25, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:07,075 INFO L418 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:07,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:07,075 INFO L82 PathProgramCache]: Analyzing trace with hash 774713205, now seen corresponding path program 21 times [2019-09-03 20:15:07,075 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:07,075 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:07,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:07,076 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:07,076 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:07,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:07,611 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 513 proven. 950 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-09-03 20:15:07,611 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:15:07,611 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 20:15:07,621 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-03 20:15:54,308 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2019-09-03 20:15:54,309 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:54,583 INFO L256 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 22 conjunts are in the unsatisfiable core [2019-09-03 20:15:54,584 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:54,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1520 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2019-09-03 20:15:54,857 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:54,857 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 12] total 38 [2019-09-03 20:15:54,858 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-03 20:15:54,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-03 20:15:54,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2019-09-03 20:15:54,859 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 38 states. [2019-09-03 20:15:57,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:57,554 INFO L93 Difference]: Finished difference Result 144 states and 162 transitions. [2019-09-03 20:15:57,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-03 20:15:57,559 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 106 [2019-09-03 20:15:57,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:57,560 INFO L225 Difference]: With dead ends: 144 [2019-09-03 20:15:57,560 INFO L226 Difference]: Without dead ends: 115 [2019-09-03 20:15:57,561 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=256, Invalid=3904, Unknown=0, NotChecked=0, Total=4160 [2019-09-03 20:15:57,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-03 20:15:57,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2019-09-03 20:15:57,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2019-09-03 20:15:57,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 123 transitions. [2019-09-03 20:15:57,566 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 123 transitions. Word has length 106 [2019-09-03 20:15:57,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:57,567 INFO L475 AbstractCegarLoop]: Abstraction has 114 states and 123 transitions. [2019-09-03 20:15:57,567 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-03 20:15:57,567 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 123 transitions. [2019-09-03 20:15:57,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-03 20:15:57,567 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:57,568 INFO L399 BasicCegarLoop]: trace histogram [34, 34, 26, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:57,568 INFO L418 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:57,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:57,568 INFO L82 PathProgramCache]: Analyzing trace with hash 345637975, now seen corresponding path program 22 times [2019-09-03 20:15:57,568 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:57,569 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:57,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:57,569 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:57,569 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:57,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:15:58,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 613 proven. 1027 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-03 20:15:58,284 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:15:58,284 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 20:15:58,319 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-03 20:15:58,353 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-03 20:15:58,353 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-03 20:15:58,355 INFO L256 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 55 conjunts are in the unsatisfiable core [2019-09-03 20:15:58,357 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-03 20:15:58,442 INFO L134 CoverageAnalysis]: Checked inductivity of 1717 backedges. 613 proven. 1027 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-03 20:15:58,447 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-03 20:15:58,448 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2019-09-03 20:15:58,448 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-03 20:15:58,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-03 20:15:58,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:15:58,449 INFO L87 Difference]: Start difference. First operand 114 states and 123 transitions. Second operand 30 states. [2019-09-03 20:15:59,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-03 20:15:59,833 INFO L93 Difference]: Finished difference Result 147 states and 165 transitions. [2019-09-03 20:15:59,834 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2019-09-03 20:15:59,834 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 112 [2019-09-03 20:15:59,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-03 20:15:59,835 INFO L225 Difference]: With dead ends: 147 [2019-09-03 20:15:59,836 INFO L226 Difference]: Without dead ends: 118 [2019-09-03 20:15:59,837 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 3 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2019-09-03 20:15:59,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2019-09-03 20:15:59,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2019-09-03 20:15:59,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-03 20:15:59,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 126 transitions. [2019-09-03 20:15:59,842 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 126 transitions. Word has length 112 [2019-09-03 20:15:59,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-03 20:15:59,842 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 126 transitions. [2019-09-03 20:15:59,842 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-03 20:15:59,843 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 126 transitions. [2019-09-03 20:15:59,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2019-09-03 20:15:59,843 INFO L391 BasicCegarLoop]: Found error trace [2019-09-03 20:15:59,843 INFO L399 BasicCegarLoop]: trace histogram [35, 35, 27, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-03 20:15:59,844 INFO L418 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-03 20:15:59,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-03 20:15:59,844 INFO L82 PathProgramCache]: Analyzing trace with hash 855727958, now seen corresponding path program 23 times [2019-09-03 20:15:59,844 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-03 20:15:59,844 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-03 20:15:59,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:59,845 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-03 20:15:59,845 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-03 20:15:59,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-03 20:16:00,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1820 backedges. 636 proven. 1107 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-09-03 20:16:00,488 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-03 20:16:00,489 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 20:16:00,500 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1