java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-crafted/mapavg3.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-07 11:58:42,345 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-07 11:58:42,347 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-07 11:58:42,359 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-09-07 11:58:42,359 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-09-07 11:58:42,360 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-09-07 11:58:42,362 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-09-07 11:58:42,364 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-09-07 11:58:42,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-09-07 11:58:42,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-09-07 11:58:42,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-09-07 11:58:42,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-09-07 11:58:42,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-09-07 11:58:42,370 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-09-07 11:58:42,371 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-09-07 11:58:42,372 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-09-07 11:58:42,373 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-09-07 11:58:42,374 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-09-07 11:58:42,375 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-09-07 11:58:42,377 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-09-07 11:58:42,383 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-09-07 11:58:42,384 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-09-07 11:58:42,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-09-07 11:58:42,388 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-09-07 11:58:42,390 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-09-07 11:58:42,397 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-09-07 11:58:42,398 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-09-07 11:58:42,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-09-07 11:58:42,400 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-09-07 11:58:42,414 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-07 11:58:42,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-07 11:58:42,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-09-07 11:58:42,415 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-09-07 11:58:42,416 INFO L138 SettingsManager]: * Use SBE=true [2019-09-07 11:58:42,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-07 11:58:42,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-07 11:58:42,416 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-09-07 11:58:42,416 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-07 11:58:42,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-07 11:58:42,417 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-07 11:58:42,417 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-07 11:58:42,417 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-07 11:58:42,417 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-07 11:58:42,418 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-07 11:58:42,418 INFO L138 SettingsManager]: * Use constant arrays=true [2019-09-07 11:58:42,418 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-07 11:58:42,418 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-07 11:58:42,418 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-07 11:58:42,419 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-09-07 11:58:42,419 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-09-07 11:58:42,419 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:58:42,419 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-07 11:58:42,419 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-07 11:58:42,420 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-09-07 11:58:42,420 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-09-07 11:58:42,420 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-07 11:58:42,420 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-07 11:58:42,420 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-09-07 11:58:42,451 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-07 11:58:42,464 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-07 11:58:42,471 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-07 11:58:42,473 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-07 11:58:42,473 INFO L275 PluginConnector]: CDTParser initialized [2019-09-07 11:58:42,474 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/mapavg3.i [2019-09-07 11:58:42,553 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e53785f/68364ff8b5a54114bf7ca2d5ef1ff625/FLAGdfe8bdd22 [2019-09-07 11:58:43,042 INFO L306 CDTParser]: Found 1 translation units. [2019-09-07 11:58:43,045 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-crafted/mapavg3.i [2019-09-07 11:58:43,053 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e53785f/68364ff8b5a54114bf7ca2d5ef1ff625/FLAGdfe8bdd22 [2019-09-07 11:58:43,403 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b5e53785f/68364ff8b5a54114bf7ca2d5ef1ff625 [2019-09-07 11:58:43,414 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-07 11:58:43,415 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-07 11:58:43,417 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-07 11:58:43,417 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-07 11:58:43,421 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-07 11:58:43,422 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,425 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4a4d6cf1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43, skipping insertion in model container [2019-09-07 11:58:43,425 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,433 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-07 11:58:43,453 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-07 11:58:43,663 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:58:43,671 INFO L188 MainTranslator]: Completed pre-run [2019-09-07 11:58:43,695 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-07 11:58:43,811 INFO L192 MainTranslator]: Completed translation [2019-09-07 11:58:43,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43 WrapperNode [2019-09-07 11:58:43,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-07 11:58:43,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-07 11:58:43,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-07 11:58:43,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-07 11:58:43,825 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,825 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,832 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,833 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,841 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,847 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,848 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... [2019-09-07 11:58:43,851 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-07 11:58:43,851 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-07 11:58:43,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-07 11:58:43,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-07 11:58:43,852 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-07 11:58:43,908 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-07 11:58:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-07 11:58:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure mapavg [2019-09-07 11:58:43,909 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-07 11:58:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-07 11:58:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-07 11:58:43,909 INFO L130 BoogieDeclarations]: Found specification of procedure mapavg [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-07 11:58:43,910 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-07 11:58:44,222 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-07 11:58:44,222 INFO L283 CfgBuilder]: Removed 3 assume(true) statements. [2019-09-07 11:58:44,223 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:58:44 BoogieIcfgContainer [2019-09-07 11:58:44,224 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-07 11:58:44,225 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-07 11:58:44,225 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-07 11:58:44,228 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-07 11:58:44,228 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.09 11:58:43" (1/3) ... [2019-09-07 11:58:44,229 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc8fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:58:44, skipping insertion in model container [2019-09-07 11:58:44,229 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.09 11:58:43" (2/3) ... [2019-09-07 11:58:44,230 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@30dc8fb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.09 11:58:44, skipping insertion in model container [2019-09-07 11:58:44,230 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.09 11:58:44" (3/3) ... [2019-09-07 11:58:44,231 INFO L109 eAbstractionObserver]: Analyzing ICFG mapavg3.i [2019-09-07 11:58:44,241 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-07 11:58:44,250 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-07 11:58:44,266 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-07 11:58:44,292 INFO L128 ementStrategyFactory]: Using default assertion order modulation [2019-09-07 11:58:44,293 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-07 11:58:44,293 INFO L378 AbstractCegarLoop]: Hoare is true [2019-09-07 11:58:44,293 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-07 11:58:44,293 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-07 11:58:44,293 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-07 11:58:44,294 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-07 11:58:44,294 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-07 11:58:44,294 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-07 11:58:44,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states. [2019-09-07 11:58:44,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:58:44,318 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:44,319 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:44,323 INFO L418 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:44,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:44,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1234592251, now seen corresponding path program 1 times [2019-09-07 11:58:44,330 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:44,331 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:44,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,373 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:44,373 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:44,491 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:58:44,494 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:58:44,494 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-09-07 11:58:44,498 INFO L454 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-09-07 11:58:44,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-09-07 11:58:44,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:58:44,515 INFO L87 Difference]: Start difference. First operand 31 states. Second operand 2 states. [2019-09-07 11:58:44,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:44,537 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2019-09-07 11:58:44,537 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-09-07 11:58:44,538 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 32 [2019-09-07 11:58:44,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:44,547 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:58:44,547 INFO L226 Difference]: Without dead ends: 26 [2019-09-07 11:58:44,551 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-09-07 11:58:44,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2019-09-07 11:58:44,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2019-09-07 11:58:44,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2019-09-07 11:58:44,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2019-09-07 11:58:44,596 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 32 [2019-09-07 11:58:44,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:44,597 INFO L475 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2019-09-07 11:58:44,597 INFO L476 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-09-07 11:58:44,598 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2019-09-07 11:58:44,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2019-09-07 11:58:44,600 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:44,600 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:44,601 INFO L418 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:44,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:44,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1054720325, now seen corresponding path program 1 times [2019-09-07 11:58:44,601 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:44,602 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:44,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,603 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:44,603 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:44,707 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-09-07 11:58:44,707 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:58:44,708 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:58:44,710 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:58:44,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:58:44,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:58:44,713 INFO L87 Difference]: Start difference. First operand 26 states and 30 transitions. Second operand 3 states. [2019-09-07 11:58:44,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:44,742 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2019-09-07 11:58:44,743 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:58:44,743 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 32 [2019-09-07 11:58:44,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:44,744 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:58:44,745 INFO L226 Difference]: Without dead ends: 28 [2019-09-07 11:58:44,746 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:58:44,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2019-09-07 11:58:44,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2019-09-07 11:58:44,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2019-09-07 11:58:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2019-09-07 11:58:44,753 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 32 [2019-09-07 11:58:44,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:44,754 INFO L475 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2019-09-07 11:58:44,754 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:58:44,754 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2019-09-07 11:58:44,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2019-09-07 11:58:44,756 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:44,756 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:44,756 INFO L418 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:44,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:44,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1286970653, now seen corresponding path program 1 times [2019-09-07 11:58:44,757 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:44,757 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:44,758 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,759 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:44,759 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:44,841 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2019-09-07 11:58:44,841 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:44,842 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:44,863 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:44,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:44,933 INFO L256 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 2 conjunts are in the unsatisfiable core [2019-09-07 11:58:44,940 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:44,974 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2019-09-07 11:58:44,979 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-09-07 11:58:44,979 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2019-09-07 11:58:44,981 INFO L454 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-09-07 11:58:44,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-09-07 11:58:44,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:58:44,982 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand 4 states. [2019-09-07 11:58:45,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:45,021 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2019-09-07 11:58:45,023 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:58:45,023 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2019-09-07 11:58:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:45,025 INFO L225 Difference]: With dead ends: 46 [2019-09-07 11:58:45,025 INFO L226 Difference]: Without dead ends: 29 [2019-09-07 11:58:45,026 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-09-07 11:58:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2019-09-07 11:58:45,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2019-09-07 11:58:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2019-09-07 11:58:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2019-09-07 11:58:45,033 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 34 [2019-09-07 11:58:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:45,034 INFO L475 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2019-09-07 11:58:45,034 INFO L476 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-09-07 11:58:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2019-09-07 11:58:45,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2019-09-07 11:58:45,035 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:45,036 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:45,036 INFO L418 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:45,036 INFO L82 PathProgramCache]: Analyzing trace with hash -631694085, now seen corresponding path program 1 times [2019-09-07 11:58:45,036 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:45,036 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:45,037 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,037 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:45,038 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:58:45,111 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-07 11:58:45,111 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-07 11:58:45,112 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-07 11:58:45,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-07 11:58:45,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:58:45,113 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 3 states. [2019-09-07 11:58:45,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:45,139 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2019-09-07 11:58:45,140 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-07 11:58:45,141 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 40 [2019-09-07 11:58:45,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:45,142 INFO L225 Difference]: With dead ends: 43 [2019-09-07 11:58:45,142 INFO L226 Difference]: Without dead ends: 30 [2019-09-07 11:58:45,142 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-07 11:58:45,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-09-07 11:58:45,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2019-09-07 11:58:45,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2019-09-07 11:58:45,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2019-09-07 11:58:45,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 40 [2019-09-07 11:58:45,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:45,151 INFO L475 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2019-09-07 11:58:45,151 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-07 11:58:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2019-09-07 11:58:45,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2019-09-07 11:58:45,154 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:45,154 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:45,154 INFO L418 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:45,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:45,155 INFO L82 PathProgramCache]: Analyzing trace with hash -490156423, now seen corresponding path program 1 times [2019-09-07 11:58:45,155 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:45,155 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:45,156 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,156 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:45,157 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:58:45,289 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:45,290 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) [2019-09-07 11:58:45,316 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:45,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:45,368 INFO L256 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:58:45,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:45,396 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:58:45,406 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:45,406 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2019-09-07 11:58:45,407 INFO L454 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-09-07 11:58:45,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-09-07 11:58:45,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:58:45,408 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 5 states. [2019-09-07 11:58:45,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:45,457 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2019-09-07 11:58:45,457 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-09-07 11:58:45,458 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 42 [2019-09-07 11:58:45,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:45,459 INFO L225 Difference]: With dead ends: 52 [2019-09-07 11:58:45,459 INFO L226 Difference]: Without dead ends: 32 [2019-09-07 11:58:45,459 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2019-09-07 11:58:45,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2019-09-07 11:58:45,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2019-09-07 11:58:45,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2019-09-07 11:58:45,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2019-09-07 11:58:45,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 42 [2019-09-07 11:58:45,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:45,466 INFO L475 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2019-09-07 11:58:45,466 INFO L476 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-09-07 11:58:45,466 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2019-09-07 11:58:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2019-09-07 11:58:45,467 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:45,467 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:45,467 INFO L418 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1271601755, now seen corresponding path program 2 times [2019-09-07 11:58:45,468 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:45,468 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:45,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,469 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:45,469 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:45,548 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2019-09-07 11:58:45,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:45,549 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:45,568 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:58:45,612 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:58:45,613 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:45,614 INFO L256 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:58:45,617 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:45,634 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (4)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:58:45,642 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:45,642 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2019-09-07 11:58:45,643 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:58:45,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:58:45,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:58:45,644 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 6 states. [2019-09-07 11:58:45,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:45,678 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2019-09-07 11:58:45,679 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-09-07 11:58:45,679 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 44 [2019-09-07 11:58:45,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:45,680 INFO L225 Difference]: With dead ends: 54 [2019-09-07 11:58:45,680 INFO L226 Difference]: Without dead ends: 34 [2019-09-07 11:58:45,681 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:58:45,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2019-09-07 11:58:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2019-09-07 11:58:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2019-09-07 11:58:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2019-09-07 11:58:45,686 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 44 [2019-09-07 11:58:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:45,687 INFO L475 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2019-09-07 11:58:45,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:58:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2019-09-07 11:58:45,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2019-09-07 11:58:45,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:45,688 INFO L399 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:45,688 INFO L418 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:45,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:45,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2104096189, now seen corresponding path program 3 times [2019-09-07 11:58:45,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:45,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:45,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,690 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:45,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:45,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2019-09-07 11:58:45,784 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:45,784 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) [2019-09-07 11:58:45,799 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:45,832 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2019-09-07 11:58:45,832 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:45,833 INFO L256 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 3 conjunts are in the unsatisfiable core [2019-09-07 11:58:45,837 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:45,866 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 16 proven. 1 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2019-09-07 11:58:45,870 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:45,870 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2019-09-07 11:58:45,871 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-07 11:58:45,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-07 11:58:45,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:58:45,874 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 6 states. [2019-09-07 11:58:45,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:45,932 INFO L93 Difference]: Finished difference Result 58 states and 69 transitions. [2019-09-07 11:58:45,932 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:58:45,932 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 46 [2019-09-07 11:58:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:45,933 INFO L225 Difference]: With dead ends: 58 [2019-09-07 11:58:45,934 INFO L226 Difference]: Without dead ends: 39 [2019-09-07 11:58:45,934 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-09-07 11:58:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2019-09-07 11:58:45,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2019-09-07 11:58:45,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2019-09-07 11:58:45,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2019-09-07 11:58:45,940 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 46 [2019-09-07 11:58:45,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:45,941 INFO L475 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2019-09-07 11:58:45,941 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-07 11:58:45,941 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2019-09-07 11:58:45,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2019-09-07 11:58:45,943 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:45,943 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:45,944 INFO L418 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:45,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:45,944 INFO L82 PathProgramCache]: Analyzing trace with hash -631599591, now seen corresponding path program 4 times [2019-09-07 11:58:45,944 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:45,945 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:45,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:45,946 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:45,946 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:46,080 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 11:58:46,080 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:46,081 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:46,105 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:46,153 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:58:46,153 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:46,154 INFO L256 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:58:46,164 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 67 trivial. 0 not checked. [2019-09-07 11:58:46,195 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:46,195 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2019-09-07 11:58:46,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-09-07 11:58:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-09-07 11:58:46,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:58:46,200 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 7 states. [2019-09-07 11:58:46,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:46,242 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2019-09-07 11:58:46,243 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-09-07 11:58:46,243 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 54 [2019-09-07 11:58:46,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:46,244 INFO L225 Difference]: With dead ends: 64 [2019-09-07 11:58:46,244 INFO L226 Difference]: Without dead ends: 40 [2019-09-07 11:58:46,245 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2019-09-07 11:58:46,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2019-09-07 11:58:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2019-09-07 11:58:46,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2019-09-07 11:58:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2019-09-07 11:58:46,255 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 54 [2019-09-07 11:58:46,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:46,255 INFO L475 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2019-09-07 11:58:46,257 INFO L476 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-09-07 11:58:46,257 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2019-09-07 11:58:46,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2019-09-07 11:58:46,258 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:46,258 INFO L399 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:46,259 INFO L418 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:46,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:46,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1024452869, now seen corresponding path program 5 times [2019-09-07 11:58:46,259 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:46,259 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:46,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,262 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:46,262 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2019-09-07 11:58:46,368 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:46,368 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:46,396 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:46,449 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2019-09-07 11:58:46,450 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:46,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 4 conjunts are in the unsatisfiable core [2019-09-07 11:58:46,454 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:46,491 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 28 proven. 4 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2019-09-07 11:58:46,499 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:46,499 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2019-09-07 11:58:46,500 INFO L454 AbstractCegarLoop]: Interpolant automaton has 8 states [2019-09-07 11:58:46,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2019-09-07 11:58:46,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:58:46,500 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 8 states. [2019-09-07 11:58:46,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:46,564 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2019-09-07 11:58:46,565 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-09-07 11:58:46,565 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 56 [2019-09-07 11:58:46,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:46,566 INFO L225 Difference]: With dead ends: 68 [2019-09-07 11:58:46,567 INFO L226 Difference]: Without dead ends: 45 [2019-09-07 11:58:46,568 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-09-07 11:58:46,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2019-09-07 11:58:46,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 43. [2019-09-07 11:58:46,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2019-09-07 11:58:46,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2019-09-07 11:58:46,585 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 56 [2019-09-07 11:58:46,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:46,589 INFO L475 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2019-09-07 11:58:46,589 INFO L476 AbstractCegarLoop]: Interpolant automaton has 8 states. [2019-09-07 11:58:46,589 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2019-09-07 11:58:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2019-09-07 11:58:46,591 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:46,591 INFO L399 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:46,592 INFO L418 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:46,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:46,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1570482089, now seen corresponding path program 6 times [2019-09-07 11:58:46,597 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:46,597 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:46,598 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,599 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:46,600 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 123 trivial. 0 not checked. [2019-09-07 11:58:46,706 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:46,707 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:46,739 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:46,819 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2019-09-07 11:58:46,819 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:46,821 INFO L256 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 5 conjunts are in the unsatisfiable core [2019-09-07 11:58:46,824 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:46,877 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 56 proven. 9 refuted. 0 times theorem prover too weak. 74 trivial. 0 not checked. [2019-09-07 11:58:46,883 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:46,883 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2019-09-07 11:58:46,884 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-09-07 11:58:46,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-09-07 11:58:46,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:58:46,884 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 11 states. [2019-09-07 11:58:46,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:46,966 INFO L93 Difference]: Finished difference Result 77 states and 89 transitions. [2019-09-07 11:58:46,967 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-09-07 11:58:46,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2019-09-07 11:58:46,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:46,969 INFO L225 Difference]: With dead ends: 77 [2019-09-07 11:58:46,969 INFO L226 Difference]: Without dead ends: 49 [2019-09-07 11:58:46,970 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-09-07 11:58:46,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2019-09-07 11:58:46,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2019-09-07 11:58:46,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2019-09-07 11:58:46,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 51 transitions. [2019-09-07 11:58:46,985 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 51 transitions. Word has length 64 [2019-09-07 11:58:46,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:46,985 INFO L475 AbstractCegarLoop]: Abstraction has 47 states and 51 transitions. [2019-09-07 11:58:46,985 INFO L476 AbstractCegarLoop]: Interpolant automaton has 11 states. [2019-09-07 11:58:46,985 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 51 transitions. [2019-09-07 11:58:46,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2019-09-07 11:58:46,990 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:46,990 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:46,991 INFO L418 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:46,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:46,996 INFO L82 PathProgramCache]: Analyzing trace with hash 819062423, now seen corresponding path program 7 times [2019-09-07 11:58:46,997 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:46,997 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:46,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:46,998 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:46,998 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:47,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:47,100 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 208 trivial. 0 not checked. [2019-09-07 11:58:47,100 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:47,101 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) [2019-09-07 11:58:47,120 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:47,173 INFO L256 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:58:47,179 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:47,280 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (9)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:58:47,286 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:47,286 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 12 [2019-09-07 11:58:47,286 INFO L454 AbstractCegarLoop]: Interpolant automaton has 12 states [2019-09-07 11:58:47,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2019-09-07 11:58:47,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:58:47,288 INFO L87 Difference]: Start difference. First operand 47 states and 51 transitions. Second operand 12 states. [2019-09-07 11:58:47,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:47,366 INFO L93 Difference]: Finished difference Result 83 states and 92 transitions. [2019-09-07 11:58:47,366 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2019-09-07 11:58:47,366 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2019-09-07 11:58:47,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:47,367 INFO L225 Difference]: With dead ends: 83 [2019-09-07 11:58:47,367 INFO L226 Difference]: Without dead ends: 53 [2019-09-07 11:58:47,368 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2019-09-07 11:58:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2019-09-07 11:58:47,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 51. [2019-09-07 11:58:47,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2019-09-07 11:58:47,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2019-09-07 11:58:47,382 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 72 [2019-09-07 11:58:47,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:47,382 INFO L475 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2019-09-07 11:58:47,382 INFO L476 AbstractCegarLoop]: Interpolant automaton has 12 states. [2019-09-07 11:58:47,382 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2019-09-07 11:58:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2019-09-07 11:58:47,385 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:47,385 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:47,385 INFO L418 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:47,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:47,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1604641545, now seen corresponding path program 8 times [2019-09-07 11:58:47,386 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:47,386 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:47,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:47,387 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:47,387 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:47,468 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 219 trivial. 0 not checked. [2019-09-07 11:58:47,469 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:47,469 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 [2019-09-07 11:58:47,486 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 11:58:47,532 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:58:47,533 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:47,534 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:58:47,536 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:47,641 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 199 trivial. 0 not checked. [2019-09-07 11:58:47,645 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:47,646 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2019-09-07 11:58:47,647 INFO L454 AbstractCegarLoop]: Interpolant automaton has 14 states [2019-09-07 11:58:47,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2019-09-07 11:58:47,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:58:47,647 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 14 states. [2019-09-07 11:58:47,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:47,717 INFO L93 Difference]: Finished difference Result 89 states and 98 transitions. [2019-09-07 11:58:47,718 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:58:47,719 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 76 [2019-09-07 11:58:47,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:47,720 INFO L225 Difference]: With dead ends: 89 [2019-09-07 11:58:47,720 INFO L226 Difference]: Without dead ends: 57 [2019-09-07 11:58:47,724 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2019-09-07 11:58:47,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2019-09-07 11:58:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 55. [2019-09-07 11:58:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2019-09-07 11:58:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 59 transitions. [2019-09-07 11:58:47,733 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 59 transitions. Word has length 76 [2019-09-07 11:58:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:47,734 INFO L475 AbstractCegarLoop]: Abstraction has 55 states and 59 transitions. [2019-09-07 11:58:47,734 INFO L476 AbstractCegarLoop]: Interpolant automaton has 14 states. [2019-09-07 11:58:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 59 transitions. [2019-09-07 11:58:47,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-09-07 11:58:47,735 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:47,736 INFO L399 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:47,736 INFO L418 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:47,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:47,737 INFO L82 PathProgramCache]: Analyzing trace with hash 973568599, now seen corresponding path program 9 times [2019-09-07 11:58:47,737 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:47,737 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:47,738 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:47,739 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:47,739 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:47,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2019-09-07 11:58:47,829 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:47,830 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:47,858 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:47,916 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2019-09-07 11:58:47,917 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:47,918 INFO L256 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 6 conjunts are in the unsatisfiable core [2019-09-07 11:58:47,920 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:47,999 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 88 proven. 16 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2019-09-07 11:58:48,003 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:48,004 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2019-09-07 11:58:48,004 INFO L454 AbstractCegarLoop]: Interpolant automaton has 13 states [2019-09-07 11:58:48,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2019-09-07 11:58:48,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:58:48,005 INFO L87 Difference]: Start difference. First operand 55 states and 59 transitions. Second operand 13 states. [2019-09-07 11:58:48,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:48,079 INFO L93 Difference]: Finished difference Result 94 states and 105 transitions. [2019-09-07 11:58:48,079 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2019-09-07 11:58:48,079 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2019-09-07 11:58:48,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:48,080 INFO L225 Difference]: With dead ends: 94 [2019-09-07 11:58:48,080 INFO L226 Difference]: Without dead ends: 61 [2019-09-07 11:58:48,081 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-09-07 11:58:48,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2019-09-07 11:58:48,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2019-09-07 11:58:48,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2019-09-07 11:58:48,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2019-09-07 11:58:48,091 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 80 [2019-09-07 11:58:48,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:48,092 INFO L475 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2019-09-07 11:58:48,092 INFO L476 AbstractCegarLoop]: Interpolant automaton has 13 states. [2019-09-07 11:58:48,092 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2019-09-07 11:58:48,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-07 11:58:48,093 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:48,093 INFO L399 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:48,093 INFO L418 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:48,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1396192077, now seen corresponding path program 10 times [2019-09-07 11:58:48,094 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:48,094 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:48,094 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:48,095 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:48,095 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:48,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:48,193 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 306 trivial. 0 not checked. [2019-09-07 11:58:48,193 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:48,193 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 [2019-09-07 11:58:48,208 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:58:48,259 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:58:48,259 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:48,261 INFO L256 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 7 conjunts are in the unsatisfiable core [2019-09-07 11:58:48,263 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:48,331 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 128 proven. 25 refuted. 0 times theorem prover too weak. 202 trivial. 0 not checked. [2019-09-07 11:58:48,336 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:48,336 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 16 [2019-09-07 11:58:48,337 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:58:48,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:58:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:58:48,338 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand 16 states. [2019-09-07 11:58:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:48,415 INFO L93 Difference]: Finished difference Result 103 states and 115 transitions. [2019-09-07 11:58:48,415 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:58:48,416 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 88 [2019-09-07 11:58:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:48,417 INFO L225 Difference]: With dead ends: 103 [2019-09-07 11:58:48,417 INFO L226 Difference]: Without dead ends: 65 [2019-09-07 11:58:48,417 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:58:48,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2019-09-07 11:58:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 63. [2019-09-07 11:58:48,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2019-09-07 11:58:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 67 transitions. [2019-09-07 11:58:48,423 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 67 transitions. Word has length 88 [2019-09-07 11:58:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:48,423 INFO L475 AbstractCegarLoop]: Abstraction has 63 states and 67 transitions. [2019-09-07 11:58:48,424 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:58:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 67 transitions. [2019-09-07 11:58:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2019-09-07 11:58:48,425 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:48,425 INFO L399 BasicCegarLoop]: trace histogram [18, 18, 8, 8, 6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:48,425 INFO L418 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:48,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:48,426 INFO L82 PathProgramCache]: Analyzing trace with hash 282000627, now seen corresponding path program 11 times [2019-09-07 11:58:48,426 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:48,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:48,427 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:48,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:48,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:48,528 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 439 trivial. 0 not checked. [2019-09-07 11:58:48,528 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:48,528 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:48,550 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:49,026 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2019-09-07 11:58:49,027 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:49,030 INFO L256 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 8 conjunts are in the unsatisfiable core [2019-09-07 11:58:49,032 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:49,119 INFO L134 CoverageAnalysis]: Checked inductivity of 475 backedges. 172 proven. 36 refuted. 0 times theorem prover too weak. 267 trivial. 0 not checked. [2019-09-07 11:58:49,124 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:49,124 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2019-09-07 11:58:49,125 INFO L454 AbstractCegarLoop]: Interpolant automaton has 16 states [2019-09-07 11:58:49,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2019-09-07 11:58:49,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:58:49,126 INFO L87 Difference]: Start difference. First operand 63 states and 67 transitions. Second operand 16 states. [2019-09-07 11:58:49,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:49,206 INFO L93 Difference]: Finished difference Result 108 states and 119 transitions. [2019-09-07 11:58:49,207 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2019-09-07 11:58:49,207 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 96 [2019-09-07 11:58:49,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:49,208 INFO L225 Difference]: With dead ends: 108 [2019-09-07 11:58:49,208 INFO L226 Difference]: Without dead ends: 69 [2019-09-07 11:58:49,209 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2019-09-07 11:58:49,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2019-09-07 11:58:49,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2019-09-07 11:58:49,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2019-09-07 11:58:49,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2019-09-07 11:58:49,222 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 96 [2019-09-07 11:58:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:49,224 INFO L475 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2019-09-07 11:58:49,224 INFO L476 AbstractCegarLoop]: Interpolant automaton has 16 states. [2019-09-07 11:58:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2019-09-07 11:58:49,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2019-09-07 11:58:49,225 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:49,226 INFO L399 BasicCegarLoop]: trace histogram [21, 21, 8, 8, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:49,226 INFO L418 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:49,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:49,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1022205361, now seen corresponding path program 12 times [2019-09-07 11:58:49,226 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:49,226 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:49,227 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:49,227 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:49,228 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:49,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:49,361 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 547 trivial. 0 not checked. [2019-09-07 11:58:49,361 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:49,361 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:49,393 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:58:49,626 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2019-09-07 11:58:49,626 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:49,628 INFO L256 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 9 conjunts are in the unsatisfiable core [2019-09-07 11:58:49,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:49,780 INFO L134 CoverageAnalysis]: Checked inductivity of 611 backedges. 232 proven. 49 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2019-09-07 11:58:49,793 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:49,793 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2019-09-07 11:58:49,794 INFO L454 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-09-07 11:58:49,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-09-07 11:58:49,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:58:49,795 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand 19 states. [2019-09-07 11:58:49,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:49,894 INFO L93 Difference]: Finished difference Result 117 states and 129 transitions. [2019-09-07 11:58:49,895 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2019-09-07 11:58:49,895 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 104 [2019-09-07 11:58:49,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:49,896 INFO L225 Difference]: With dead ends: 117 [2019-09-07 11:58:49,896 INFO L226 Difference]: Without dead ends: 73 [2019-09-07 11:58:49,897 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2019-09-07 11:58:49,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2019-09-07 11:58:49,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2019-09-07 11:58:49,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2019-09-07 11:58:49,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 75 transitions. [2019-09-07 11:58:49,903 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 75 transitions. Word has length 104 [2019-09-07 11:58:49,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:49,903 INFO L475 AbstractCegarLoop]: Abstraction has 71 states and 75 transitions. [2019-09-07 11:58:49,903 INFO L476 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-09-07 11:58:49,903 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 75 transitions. [2019-09-07 11:58:49,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-07 11:58:49,905 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:49,905 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 9, 9, 7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:49,905 INFO L418 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:49,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:49,906 INFO L82 PathProgramCache]: Analyzing trace with hash -774797169, now seen corresponding path program 13 times [2019-09-07 11:58:49,906 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:49,906 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:49,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:49,907 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:49,907 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:49,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:50,030 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 720 trivial. 0 not checked. [2019-09-07 11:58:50,031 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:50,031 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:50,051 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:50,110 INFO L256 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:58:50,112 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:50,266 INFO L134 CoverageAnalysis]: Checked inductivity of 769 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 688 trivial. 0 not checked. [2019-09-07 11:58:50,271 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:50,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 12] total 20 [2019-09-07 11:58:50,273 INFO L454 AbstractCegarLoop]: Interpolant automaton has 20 states [2019-09-07 11:58:50,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2019-09-07 11:58:50,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:58:50,274 INFO L87 Difference]: Start difference. First operand 71 states and 75 transitions. Second operand 20 states. [2019-09-07 11:58:50,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:50,371 INFO L93 Difference]: Finished difference Result 123 states and 132 transitions. [2019-09-07 11:58:50,371 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2019-09-07 11:58:50,371 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 112 [2019-09-07 11:58:50,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:50,372 INFO L225 Difference]: With dead ends: 123 [2019-09-07 11:58:50,373 INFO L226 Difference]: Without dead ends: 77 [2019-09-07 11:58:50,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2019-09-07 11:58:50,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2019-09-07 11:58:50,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 75. [2019-09-07 11:58:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2019-09-07 11:58:50,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 79 transitions. [2019-09-07 11:58:50,383 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 79 transitions. Word has length 112 [2019-09-07 11:58:50,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:50,385 INFO L475 AbstractCegarLoop]: Abstraction has 75 states and 79 transitions. [2019-09-07 11:58:50,385 INFO L476 AbstractCegarLoop]: Interpolant automaton has 20 states. [2019-09-07 11:58:50,385 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 79 transitions. [2019-09-07 11:58:50,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-09-07 11:58:50,389 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:50,389 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 10, 10, 8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:50,389 INFO L418 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:50,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:50,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2054076143, now seen corresponding path program 14 times [2019-09-07 11:58:50,390 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:50,390 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:50,391 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:50,391 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:50,548 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 739 trivial. 0 not checked. [2019-09-07 11:58:50,549 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:50,549 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:50,578 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:50,640 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:58:50,640 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:50,642 INFO L256 TraceCheckSpWp]: Trace formula consists of 333 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 11:58:50,644 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:50,824 INFO L134 CoverageAnalysis]: Checked inductivity of 803 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2019-09-07 11:58:50,835 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:50,835 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2019-09-07 11:58:50,836 INFO L454 AbstractCegarLoop]: Interpolant automaton has 22 states [2019-09-07 11:58:50,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2019-09-07 11:58:50,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 11:58:50,837 INFO L87 Difference]: Start difference. First operand 75 states and 79 transitions. Second operand 22 states. [2019-09-07 11:58:50,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:50,927 INFO L93 Difference]: Finished difference Result 129 states and 138 transitions. [2019-09-07 11:58:50,928 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:58:50,928 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 116 [2019-09-07 11:58:50,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:50,929 INFO L225 Difference]: With dead ends: 129 [2019-09-07 11:58:50,929 INFO L226 Difference]: Without dead ends: 81 [2019-09-07 11:58:50,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2019-09-07 11:58:50,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2019-09-07 11:58:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2019-09-07 11:58:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2019-09-07 11:58:50,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2019-09-07 11:58:50,936 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 116 [2019-09-07 11:58:50,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:50,937 INFO L475 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2019-09-07 11:58:50,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 22 states. [2019-09-07 11:58:50,937 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2019-09-07 11:58:50,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2019-09-07 11:58:50,939 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:50,939 INFO L399 BasicCegarLoop]: trace histogram [24, 24, 11, 11, 9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:50,940 INFO L418 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:50,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:50,940 INFO L82 PathProgramCache]: Analyzing trace with hash 530975823, now seen corresponding path program 15 times [2019-09-07 11:58:50,940 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:50,940 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:50,941 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:50,941 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:50,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:50,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:51,092 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2019-09-07 11:58:51,092 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:51,093 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:51,107 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:51,221 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2019-09-07 11:58:51,221 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:51,223 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 10 conjunts are in the unsatisfiable core [2019-09-07 11:58:51,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:51,327 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 296 proven. 64 refuted. 0 times theorem prover too weak. 481 trivial. 0 not checked. [2019-09-07 11:58:51,331 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:51,331 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2019-09-07 11:58:51,331 INFO L454 AbstractCegarLoop]: Interpolant automaton has 21 states [2019-09-07 11:58:51,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2019-09-07 11:58:51,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:58:51,332 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand 21 states. [2019-09-07 11:58:51,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:51,416 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2019-09-07 11:58:51,416 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2019-09-07 11:58:51,416 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 120 [2019-09-07 11:58:51,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:51,417 INFO L225 Difference]: With dead ends: 134 [2019-09-07 11:58:51,417 INFO L226 Difference]: Without dead ends: 85 [2019-09-07 11:58:51,418 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2019-09-07 11:58:51,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2019-09-07 11:58:51,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2019-09-07 11:58:51,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2019-09-07 11:58:51,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 87 transitions. [2019-09-07 11:58:51,423 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 87 transitions. Word has length 120 [2019-09-07 11:58:51,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:51,423 INFO L475 AbstractCegarLoop]: Abstraction has 83 states and 87 transitions. [2019-09-07 11:58:51,423 INFO L476 AbstractCegarLoop]: Interpolant automaton has 21 states. [2019-09-07 11:58:51,423 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 87 transitions. [2019-09-07 11:58:51,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2019-09-07 11:58:51,424 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:51,425 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 11, 11, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:51,425 INFO L418 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:51,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:51,425 INFO L82 PathProgramCache]: Analyzing trace with hash -539458901, now seen corresponding path program 16 times [2019-09-07 11:58:51,425 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:51,426 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:51,426 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:51,426 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:51,427 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:51,578 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 11:58:51,578 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:51,578 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 [2019-09-07 11:58:51,598 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 11:58:51,664 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:58:51,665 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:51,666 INFO L256 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 11:58:51,671 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:51,709 INFO L134 CoverageAnalysis]: Checked inductivity of 1019 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 898 trivial. 0 not checked. [2019-09-07 11:58:51,713 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:51,713 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2019-09-07 11:58:51,714 INFO L454 AbstractCegarLoop]: Interpolant automaton has 15 states [2019-09-07 11:58:51,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2019-09-07 11:58:51,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:58:51,715 INFO L87 Difference]: Start difference. First operand 83 states and 87 transitions. Second operand 15 states. [2019-09-07 11:58:51,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:51,765 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2019-09-07 11:58:51,769 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-09-07 11:58:51,770 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 128 [2019-09-07 11:58:51,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:51,770 INFO L225 Difference]: With dead ends: 140 [2019-09-07 11:58:51,771 INFO L226 Difference]: Without dead ends: 86 [2019-09-07 11:58:51,771 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2019-09-07 11:58:51,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2019-09-07 11:58:51,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2019-09-07 11:58:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2019-09-07 11:58:51,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2019-09-07 11:58:51,776 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 128 [2019-09-07 11:58:51,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:51,776 INFO L475 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2019-09-07 11:58:51,776 INFO L476 AbstractCegarLoop]: Interpolant automaton has 15 states. [2019-09-07 11:58:51,776 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2019-09-07 11:58:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-09-07 11:58:51,777 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:51,778 INFO L399 BasicCegarLoop]: trace histogram [27, 27, 12, 12, 10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:51,778 INFO L418 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:51,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:51,778 INFO L82 PathProgramCache]: Analyzing trace with hash -794441459, now seen corresponding path program 17 times [2019-09-07 11:58:51,778 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:51,779 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:51,779 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:51,779 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:51,780 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:51,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 942 trivial. 0 not checked. [2019-09-07 11:58:51,914 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:51,914 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 [2019-09-07 11:58:51,925 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 11:58:54,297 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2019-09-07 11:58:54,297 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:54,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 11 conjunts are in the unsatisfiable core [2019-09-07 11:58:54,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 1042 backedges. 364 proven. 81 refuted. 0 times theorem prover too weak. 597 trivial. 0 not checked. [2019-09-07 11:58:54,453 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:54,453 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2019-09-07 11:58:54,454 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 11:58:54,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 11:58:54,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:58:54,455 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand 23 states. [2019-09-07 11:58:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:54,538 INFO L93 Difference]: Finished difference Result 144 states and 155 transitions. [2019-09-07 11:58:54,542 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2019-09-07 11:58:54,542 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 130 [2019-09-07 11:58:54,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:54,543 INFO L225 Difference]: With dead ends: 144 [2019-09-07 11:58:54,543 INFO L226 Difference]: Without dead ends: 91 [2019-09-07 11:58:54,544 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:58:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2019-09-07 11:58:54,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 89. [2019-09-07 11:58:54,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2019-09-07 11:58:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 93 transitions. [2019-09-07 11:58:54,550 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 93 transitions. Word has length 130 [2019-09-07 11:58:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:54,551 INFO L475 AbstractCegarLoop]: Abstraction has 89 states and 93 transitions. [2019-09-07 11:58:54,551 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 11:58:54,551 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 93 transitions. [2019-09-07 11:58:54,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2019-09-07 11:58:54,553 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:54,553 INFO L399 BasicCegarLoop]: trace histogram [30, 30, 12, 12, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:54,554 INFO L418 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:54,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:54,554 INFO L82 PathProgramCache]: Analyzing trace with hash 493676649, now seen corresponding path program 18 times [2019-09-07 11:58:54,554 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:54,554 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:54,555 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:54,556 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:54,556 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:54,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1096 trivial. 0 not checked. [2019-09-07 11:58:54,767 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:54,767 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 [2019-09-07 11:58:54,796 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 11:58:55,362 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2019-09-07 11:58:55,363 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:55,366 INFO L256 TraceCheckSpWp]: Trace formula consists of 357 conjuncts, 12 conjunts are in the unsatisfiable core [2019-09-07 11:58:55,368 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:55,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1240 backedges. 448 proven. 100 refuted. 0 times theorem prover too weak. 692 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (20)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:58:55,562 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:55,562 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 13] total 26 [2019-09-07 11:58:55,564 INFO L454 AbstractCegarLoop]: Interpolant automaton has 26 states [2019-09-07 11:58:55,564 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2019-09-07 11:58:55,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:58:55,565 INFO L87 Difference]: Start difference. First operand 89 states and 93 transitions. Second operand 26 states. [2019-09-07 11:58:55,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:55,670 INFO L93 Difference]: Finished difference Result 153 states and 165 transitions. [2019-09-07 11:58:55,672 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 11:58:55,673 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 138 [2019-09-07 11:58:55,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:55,674 INFO L225 Difference]: With dead ends: 153 [2019-09-07 11:58:55,674 INFO L226 Difference]: Without dead ends: 95 [2019-09-07 11:58:55,676 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2019-09-07 11:58:55,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2019-09-07 11:58:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 93. [2019-09-07 11:58:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2019-09-07 11:58:55,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 97 transitions. [2019-09-07 11:58:55,687 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 97 transitions. Word has length 138 [2019-09-07 11:58:55,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:55,687 INFO L475 AbstractCegarLoop]: Abstraction has 93 states and 97 transitions. [2019-09-07 11:58:55,687 INFO L476 AbstractCegarLoop]: Interpolant automaton has 26 states. [2019-09-07 11:58:55,687 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 97 transitions. [2019-09-07 11:58:55,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2019-09-07 11:58:55,688 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:55,688 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 13, 13, 11, 11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:55,689 INFO L418 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:55,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:55,689 INFO L82 PathProgramCache]: Analyzing trace with hash -1179904343, now seen corresponding path program 19 times [2019-09-07 11:58:55,689 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:55,689 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:55,690 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:55,691 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:55,691 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:55,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:55,904 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1339 trivial. 0 not checked. [2019-09-07 11:58:55,904 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:55,905 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:55,915 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:55,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 408 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 11:58:55,988 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:56,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1460 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1291 trivial. 0 not checked. [2019-09-07 11:58:56,196 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:56,196 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16] total 28 [2019-09-07 11:58:56,196 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:58:56,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:58:56,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:58:56,198 INFO L87 Difference]: Start difference. First operand 93 states and 97 transitions. Second operand 28 states. [2019-09-07 11:58:56,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:56,347 INFO L93 Difference]: Finished difference Result 159 states and 168 transitions. [2019-09-07 11:58:56,348 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:58:56,348 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 146 [2019-09-07 11:58:56,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:56,349 INFO L225 Difference]: With dead ends: 159 [2019-09-07 11:58:56,349 INFO L226 Difference]: Without dead ends: 99 [2019-09-07 11:58:56,350 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:58:56,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2019-09-07 11:58:56,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2019-09-07 11:58:56,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2019-09-07 11:58:56,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2019-09-07 11:58:56,359 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 146 [2019-09-07 11:58:56,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:56,359 INFO L475 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2019-09-07 11:58:56,360 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:58:56,360 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2019-09-07 11:58:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2019-09-07 11:58:56,361 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:56,361 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 14, 14, 12, 12, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:56,361 INFO L418 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:56,361 INFO L82 PathProgramCache]: Analyzing trace with hash -532519415, now seen corresponding path program 20 times [2019-09-07 11:58:56,362 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:56,362 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:56,362 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:56,363 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:58:56,363 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:56,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:56,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 1366 trivial. 0 not checked. [2019-09-07 11:58:56,558 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:56,559 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) [2019-09-07 11:58:56,577 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:56,654 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:58:56,655 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:56,657 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 11:58:56,660 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:57,042 INFO L134 CoverageAnalysis]: Checked inductivity of 1510 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1314 trivial. 0 not checked. [2019-09-07 11:58:57,047 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:57,048 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 30 [2019-09-07 11:58:57,049 INFO L454 AbstractCegarLoop]: Interpolant automaton has 30 states [2019-09-07 11:58:57,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2019-09-07 11:58:57,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:58:57,051 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand 30 states. [2019-09-07 11:58:57,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:57,219 INFO L93 Difference]: Finished difference Result 165 states and 174 transitions. [2019-09-07 11:58:57,221 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2019-09-07 11:58:57,221 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 150 [2019-09-07 11:58:57,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:57,223 INFO L225 Difference]: With dead ends: 165 [2019-09-07 11:58:57,223 INFO L226 Difference]: Without dead ends: 103 [2019-09-07 11:58:57,224 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2019-09-07 11:58:57,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2019-09-07 11:58:57,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2019-09-07 11:58:57,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2019-09-07 11:58:57,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 105 transitions. [2019-09-07 11:58:57,231 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 105 transitions. Word has length 150 [2019-09-07 11:58:57,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:57,231 INFO L475 AbstractCegarLoop]: Abstraction has 101 states and 105 transitions. [2019-09-07 11:58:57,231 INFO L476 AbstractCegarLoop]: Interpolant automaton has 30 states. [2019-09-07 11:58:57,231 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 105 transitions. [2019-09-07 11:58:57,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2019-09-07 11:58:57,233 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:57,234 INFO L399 BasicCegarLoop]: trace histogram [33, 33, 15, 15, 13, 13, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:57,234 INFO L418 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:57,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:57,235 INFO L82 PathProgramCache]: Analyzing trace with hash -169943959, now seen corresponding path program 21 times [2019-09-07 11:58:57,235 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:57,235 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:57,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:57,237 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:57,237 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:57,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:57,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1395 trivial. 0 not checked. [2019-09-07 11:58:57,462 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:57,462 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) [2019-09-07 11:58:57,476 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:57,796 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2019-09-07 11:58:57,796 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:57,800 INFO L256 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 13 conjunts are in the unsatisfiable core [2019-09-07 11:58:57,802 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:57,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 536 proven. 121 refuted. 0 times theorem prover too weak. 907 trivial. 0 not checked. [2019-09-07 11:58:57,978 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:57,978 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 28 [2019-09-07 11:58:57,980 INFO L454 AbstractCegarLoop]: Interpolant automaton has 28 states [2019-09-07 11:58:57,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2019-09-07 11:58:57,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:58:57,980 INFO L87 Difference]: Start difference. First operand 101 states and 105 transitions. Second operand 28 states. [2019-09-07 11:58:58,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:58,072 INFO L93 Difference]: Finished difference Result 170 states and 181 transitions. [2019-09-07 11:58:58,072 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2019-09-07 11:58:58,073 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 154 [2019-09-07 11:58:58,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:58,074 INFO L225 Difference]: With dead ends: 170 [2019-09-07 11:58:58,074 INFO L226 Difference]: Without dead ends: 107 [2019-09-07 11:58:58,075 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=546, Unknown=0, NotChecked=0, Total=756 [2019-09-07 11:58:58,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2019-09-07 11:58:58,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2019-09-07 11:58:58,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2019-09-07 11:58:58,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2019-09-07 11:58:58,080 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 154 [2019-09-07 11:58:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:58,080 INFO L475 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2019-09-07 11:58:58,081 INFO L476 AbstractCegarLoop]: Interpolant automaton has 28 states. [2019-09-07 11:58:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2019-09-07 11:58:58,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2019-09-07 11:58:58,082 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:58,082 INFO L399 BasicCegarLoop]: trace histogram [36, 36, 15, 15, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:58,082 INFO L418 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:58,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:58,082 INFO L82 PathProgramCache]: Analyzing trace with hash -177664827, now seen corresponding path program 22 times [2019-09-07 11:58:58,082 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:58,083 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:58,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:58,083 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:58,083 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1579 trivial. 0 not checked. [2019-09-07 11:58:58,302 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:58,302 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:58,316 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:58:58,392 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:58:58,393 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:58:58,394 INFO L256 TraceCheckSpWp]: Trace formula consists of 447 conjuncts, 14 conjunts are in the unsatisfiable core [2019-09-07 11:58:58,396 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:58:58,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1804 backedges. 632 proven. 144 refuted. 0 times theorem prover too weak. 1028 trivial. 0 not checked. [2019-09-07 11:58:58,631 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:58:58,631 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2019-09-07 11:58:58,632 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:58:58,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:58:58,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:58:58,633 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand 31 states. [2019-09-07 11:58:58,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:58:58,754 INFO L93 Difference]: Finished difference Result 179 states and 191 transitions. [2019-09-07 11:58:58,754 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:58:58,755 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 162 [2019-09-07 11:58:58,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:58:58,756 INFO L225 Difference]: With dead ends: 179 [2019-09-07 11:58:58,756 INFO L226 Difference]: Without dead ends: 111 [2019-09-07 11:58:58,757 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:58:58,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2019-09-07 11:58:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 109. [2019-09-07 11:58:58,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2019-09-07 11:58:58,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 113 transitions. [2019-09-07 11:58:58,763 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 113 transitions. Word has length 162 [2019-09-07 11:58:58,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:58:58,764 INFO L475 AbstractCegarLoop]: Abstraction has 109 states and 113 transitions. [2019-09-07 11:58:58,764 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:58:58,764 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 113 transitions. [2019-09-07 11:58:58,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2019-09-07 11:58:58,767 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:58:58,767 INFO L399 BasicCegarLoop]: trace histogram [39, 39, 16, 16, 14, 14, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:58:58,768 INFO L418 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:58:58,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:58:58,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1043356933, now seen corresponding path program 23 times [2019-09-07 11:58:58,768 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:58:58,768 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:58:58,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:58,770 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:58:58,770 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:58:58,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:58:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1870 trivial. 0 not checked. [2019-09-07 11:58:59,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:58:59,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:58:59,040 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:08,506 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2019-09-07 11:59:08,507 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:08,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 406 conjuncts, 15 conjunts are in the unsatisfiable core [2019-09-07 11:59:08,521 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:08,777 INFO L134 CoverageAnalysis]: Checked inductivity of 2066 backedges. 732 proven. 169 refuted. 0 times theorem prover too weak. 1165 trivial. 0 not checked. [2019-09-07 11:59:08,787 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:08,787 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 31 [2019-09-07 11:59:08,788 INFO L454 AbstractCegarLoop]: Interpolant automaton has 31 states [2019-09-07 11:59:08,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2019-09-07 11:59:08,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:59:08,789 INFO L87 Difference]: Start difference. First operand 109 states and 113 transitions. Second operand 31 states. [2019-09-07 11:59:08,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:08,901 INFO L93 Difference]: Finished difference Result 184 states and 195 transitions. [2019-09-07 11:59:08,901 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2019-09-07 11:59:08,901 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 170 [2019-09-07 11:59:08,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:08,902 INFO L225 Difference]: With dead ends: 184 [2019-09-07 11:59:08,902 INFO L226 Difference]: Without dead ends: 115 [2019-09-07 11:59:08,903 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2019-09-07 11:59:08,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2019-09-07 11:59:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2019-09-07 11:59:08,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2019-09-07 11:59:08,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 117 transitions. [2019-09-07 11:59:08,907 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 117 transitions. Word has length 170 [2019-09-07 11:59:08,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:08,907 INFO L475 AbstractCegarLoop]: Abstraction has 113 states and 117 transitions. [2019-09-07 11:59:08,907 INFO L476 AbstractCegarLoop]: Interpolant automaton has 31 states. [2019-09-07 11:59:08,907 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 117 transitions. [2019-09-07 11:59:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2019-09-07 11:59:08,909 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:08,909 INFO L399 BasicCegarLoop]: trace histogram [42, 42, 16, 16, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:08,909 INFO L418 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:08,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:08,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1183490145, now seen corresponding path program 24 times [2019-09-07 11:59:08,910 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:08,910 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:08,910 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:08,911 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:08,911 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:09,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2088 trivial. 0 not checked. [2019-09-07 11:59:09,142 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:09,142 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:09,171 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:10,358 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2019-09-07 11:59:10,359 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:10,364 INFO L256 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 16 conjunts are in the unsatisfiable core [2019-09-07 11:59:10,366 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:10,703 INFO L134 CoverageAnalysis]: Checked inductivity of 2344 backedges. 848 proven. 196 refuted. 0 times theorem prover too weak. 1300 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (26)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 11:59:10,711 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:10,711 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 17] total 34 [2019-09-07 11:59:10,712 INFO L454 AbstractCegarLoop]: Interpolant automaton has 34 states [2019-09-07 11:59:10,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2019-09-07 11:59:10,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:59:10,713 INFO L87 Difference]: Start difference. First operand 113 states and 117 transitions. Second operand 34 states. [2019-09-07 11:59:10,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:10,843 INFO L93 Difference]: Finished difference Result 193 states and 205 transitions. [2019-09-07 11:59:10,844 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2019-09-07 11:59:10,844 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 178 [2019-09-07 11:59:10,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:10,845 INFO L225 Difference]: With dead ends: 193 [2019-09-07 11:59:10,845 INFO L226 Difference]: Without dead ends: 119 [2019-09-07 11:59:10,848 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=306, Invalid=816, Unknown=0, NotChecked=0, Total=1122 [2019-09-07 11:59:10,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2019-09-07 11:59:10,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2019-09-07 11:59:10,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2019-09-07 11:59:10,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 121 transitions. [2019-09-07 11:59:10,857 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 121 transitions. Word has length 178 [2019-09-07 11:59:10,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:10,858 INFO L475 AbstractCegarLoop]: Abstraction has 117 states and 121 transitions. [2019-09-07 11:59:10,858 INFO L476 AbstractCegarLoop]: Interpolant automaton has 34 states. [2019-09-07 11:59:10,858 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 121 transitions. [2019-09-07 11:59:10,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2019-09-07 11:59:10,861 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:10,862 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 17, 17, 15, 15, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:10,862 INFO L418 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:10,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:10,862 INFO L82 PathProgramCache]: Analyzing trace with hash 2090821281, now seen corresponding path program 25 times [2019-09-07 11:59:10,862 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:10,863 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:10,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:10,863 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:10,863 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:10,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2419 trivial. 0 not checked. [2019-09-07 11:59:11,111 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:11,111 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:11,131 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:11,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:11,222 INFO L256 TraceCheckSpWp]: Trace formula consists of 508 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 11:59:11,225 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:11,585 INFO L134 CoverageAnalysis]: Checked inductivity of 2644 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2355 trivial. 0 not checked. [2019-09-07 11:59:11,588 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:11,588 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 20] total 36 [2019-09-07 11:59:11,589 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 11:59:11,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 11:59:11,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:59:11,590 INFO L87 Difference]: Start difference. First operand 117 states and 121 transitions. Second operand 36 states. [2019-09-07 11:59:11,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:11,721 INFO L93 Difference]: Finished difference Result 199 states and 208 transitions. [2019-09-07 11:59:11,721 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 11:59:11,722 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 186 [2019-09-07 11:59:11,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:11,723 INFO L225 Difference]: With dead ends: 199 [2019-09-07 11:59:11,723 INFO L226 Difference]: Without dead ends: 123 [2019-09-07 11:59:11,725 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:59:11,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2019-09-07 11:59:11,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 121. [2019-09-07 11:59:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2019-09-07 11:59:11,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 125 transitions. [2019-09-07 11:59:11,730 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 125 transitions. Word has length 186 [2019-09-07 11:59:11,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:11,730 INFO L475 AbstractCegarLoop]: Abstraction has 121 states and 125 transitions. [2019-09-07 11:59:11,730 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 11:59:11,730 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 125 transitions. [2019-09-07 11:59:11,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2019-09-07 11:59:11,731 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:11,732 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 18, 18, 16, 16, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:11,732 INFO L418 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:11,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:11,732 INFO L82 PathProgramCache]: Analyzing trace with hash -1152209407, now seen corresponding path program 26 times [2019-09-07 11:59:11,732 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:11,733 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:11,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:11,733 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 11:59:11,733 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:11,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:12,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2454 trivial. 0 not checked. [2019-09-07 11:59:12,026 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:12,026 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:12,040 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:12,156 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 11:59:12,156 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:12,159 INFO L256 TraceCheckSpWp]: Trace formula consists of 518 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 11:59:12,162 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:12,503 INFO L134 CoverageAnalysis]: Checked inductivity of 2710 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2386 trivial. 0 not checked. [2019-09-07 11:59:12,507 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:12,507 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21] total 38 [2019-09-07 11:59:12,508 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 11:59:12,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 11:59:12,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:59:12,510 INFO L87 Difference]: Start difference. First operand 121 states and 125 transitions. Second operand 38 states. [2019-09-07 11:59:12,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:12,701 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2019-09-07 11:59:12,701 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 11:59:12,701 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 190 [2019-09-07 11:59:12,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:12,702 INFO L225 Difference]: With dead ends: 205 [2019-09-07 11:59:12,702 INFO L226 Difference]: Without dead ends: 127 [2019-09-07 11:59:12,706 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 11:59:12,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2019-09-07 11:59:12,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 125. [2019-09-07 11:59:12,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2019-09-07 11:59:12,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 129 transitions. [2019-09-07 11:59:12,719 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 129 transitions. Word has length 190 [2019-09-07 11:59:12,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:12,719 INFO L475 AbstractCegarLoop]: Abstraction has 125 states and 129 transitions. [2019-09-07 11:59:12,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 11:59:12,720 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 129 transitions. [2019-09-07 11:59:12,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2019-09-07 11:59:12,723 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:12,724 INFO L399 BasicCegarLoop]: trace histogram [45, 45, 19, 19, 17, 17, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:12,724 INFO L418 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:12,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:12,724 INFO L82 PathProgramCache]: Analyzing trace with hash 1057168481, now seen corresponding path program 27 times [2019-09-07 11:59:12,724 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:12,725 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:12,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:12,725 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:12,725 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:12,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2491 trivial. 0 not checked. [2019-09-07 11:59:12,990 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:12,990 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:13,009 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:14,465 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2019-09-07 11:59:14,465 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:14,468 INFO L256 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 17 conjunts are in the unsatisfiable core [2019-09-07 11:59:14,471 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:14,746 INFO L134 CoverageAnalysis]: Checked inductivity of 2780 backedges. 968 proven. 225 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2019-09-07 11:59:14,751 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:14,752 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18] total 36 [2019-09-07 11:59:14,752 INFO L454 AbstractCegarLoop]: Interpolant automaton has 36 states [2019-09-07 11:59:14,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2019-09-07 11:59:14,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:59:14,753 INFO L87 Difference]: Start difference. First operand 125 states and 129 transitions. Second operand 36 states. [2019-09-07 11:59:14,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:14,885 INFO L93 Difference]: Finished difference Result 210 states and 221 transitions. [2019-09-07 11:59:14,886 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2019-09-07 11:59:14,886 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 194 [2019-09-07 11:59:14,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:14,887 INFO L225 Difference]: With dead ends: 210 [2019-09-07 11:59:14,887 INFO L226 Difference]: Without dead ends: 131 [2019-09-07 11:59:14,888 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 179 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=342, Invalid=918, Unknown=0, NotChecked=0, Total=1260 [2019-09-07 11:59:14,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2019-09-07 11:59:14,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 129. [2019-09-07 11:59:14,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2019-09-07 11:59:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 133 transitions. [2019-09-07 11:59:14,894 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 133 transitions. Word has length 194 [2019-09-07 11:59:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:14,894 INFO L475 AbstractCegarLoop]: Abstraction has 129 states and 133 transitions. [2019-09-07 11:59:14,894 INFO L476 AbstractCegarLoop]: Interpolant automaton has 36 states. [2019-09-07 11:59:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 133 transitions. [2019-09-07 11:59:14,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2019-09-07 11:59:14,896 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:14,896 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 19, 19, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:14,896 INFO L418 AbstractCegarLoop]: === Iteration 32 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -951881539, now seen corresponding path program 28 times [2019-09-07 11:59:14,897 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:14,897 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:14,897 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:14,897 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:14,898 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 11:59:15,304 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:15,304 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 11:59:15,324 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:15,427 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 11:59:15,427 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 11:59:15,429 INFO L256 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 11:59:15,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 11:59:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3100 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2739 trivial. 0 not checked. [2019-09-07 11:59:15,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 11:59:15,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2019-09-07 11:59:15,474 INFO L454 AbstractCegarLoop]: Interpolant automaton has 23 states [2019-09-07 11:59:15,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2019-09-07 11:59:15,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:59:15,475 INFO L87 Difference]: Start difference. First operand 129 states and 133 transitions. Second operand 23 states. [2019-09-07 11:59:15,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 11:59:15,559 INFO L93 Difference]: Finished difference Result 216 states and 224 transitions. [2019-09-07 11:59:15,559 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2019-09-07 11:59:15,559 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 202 [2019-09-07 11:59:15,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 11:59:15,560 INFO L225 Difference]: With dead ends: 216 [2019-09-07 11:59:15,561 INFO L226 Difference]: Without dead ends: 132 [2019-09-07 11:59:15,561 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2019-09-07 11:59:15,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2019-09-07 11:59:15,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2019-09-07 11:59:15,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2019-09-07 11:59:15,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 135 transitions. [2019-09-07 11:59:15,567 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 135 transitions. Word has length 202 [2019-09-07 11:59:15,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 11:59:15,568 INFO L475 AbstractCegarLoop]: Abstraction has 131 states and 135 transitions. [2019-09-07 11:59:15,568 INFO L476 AbstractCegarLoop]: Interpolant automaton has 23 states. [2019-09-07 11:59:15,568 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 135 transitions. [2019-09-07 11:59:15,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2019-09-07 11:59:15,569 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 11:59:15,569 INFO L399 BasicCegarLoop]: trace histogram [48, 48, 20, 20, 18, 18, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 11:59:15,569 INFO L418 AbstractCegarLoop]: === Iteration 33 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 11:59:15,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 11:59:15,570 INFO L82 PathProgramCache]: Analyzing trace with hash 1546491039, now seen corresponding path program 29 times [2019-09-07 11:59:15,570 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 11:59:15,570 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 11:59:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:15,571 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 11:59:15,571 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 11:59:15,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 11:59:15,906 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2019-09-07 11:59:15,907 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 11:59:15,907 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 11:59:15,922 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:00:13,224 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2019-09-07 12:00:13,224 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:00:13,254 INFO L256 TraceCheckSpWp]: Trace formula consists of 491 conjuncts, 18 conjunts are in the unsatisfiable core [2019-09-07 12:00:13,257 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:13,699 INFO L134 CoverageAnalysis]: Checked inductivity of 3139 backedges. 1092 proven. 256 refuted. 0 times theorem prover too weak. 1791 trivial. 0 not checked. [2019-09-07 12:00:13,725 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:13,725 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 19] total 38 [2019-09-07 12:00:13,726 INFO L454 AbstractCegarLoop]: Interpolant automaton has 38 states [2019-09-07 12:00:13,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2019-09-07 12:00:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:00:13,728 INFO L87 Difference]: Start difference. First operand 131 states and 135 transitions. Second operand 38 states. [2019-09-07 12:00:13,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:13,913 INFO L93 Difference]: Finished difference Result 220 states and 231 transitions. [2019-09-07 12:00:13,913 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:00:13,913 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 204 [2019-09-07 12:00:13,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:13,915 INFO L225 Difference]: With dead ends: 220 [2019-09-07 12:00:13,915 INFO L226 Difference]: Without dead ends: 137 [2019-09-07 12:00:13,916 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2019-09-07 12:00:13,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2019-09-07 12:00:13,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 135. [2019-09-07 12:00:13,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2019-09-07 12:00:13,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 139 transitions. [2019-09-07 12:00:13,922 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 139 transitions. Word has length 204 [2019-09-07 12:00:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:13,922 INFO L475 AbstractCegarLoop]: Abstraction has 135 states and 139 transitions. [2019-09-07 12:00:13,922 INFO L476 AbstractCegarLoop]: Interpolant automaton has 38 states. [2019-09-07 12:00:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 139 transitions. [2019-09-07 12:00:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2019-09-07 12:00:13,924 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:13,924 INFO L399 BasicCegarLoop]: trace histogram [51, 51, 20, 20, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:13,924 INFO L418 AbstractCegarLoop]: === Iteration 34 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:13,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1005818363, now seen corresponding path program 30 times [2019-09-07 12:00:13,925 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:13,925 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:13,925 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:13,926 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:00:13,926 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3079 trivial. 0 not checked. [2019-09-07 12:00:14,257 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:14,257 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:14,267 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:00:17,149 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 35 check-sat command(s) [2019-09-07 12:00:17,149 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:00:17,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 542 conjuncts, 19 conjunts are in the unsatisfiable core [2019-09-07 12:00:17,161 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:17,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3479 backedges. 1232 proven. 289 refuted. 0 times theorem prover too weak. 1958 trivial. 0 not checked. [2019-09-07 12:00:17,481 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:17,481 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 41 [2019-09-07 12:00:17,482 INFO L454 AbstractCegarLoop]: Interpolant automaton has 41 states [2019-09-07 12:00:17,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2019-09-07 12:00:17,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:00:17,483 INFO L87 Difference]: Start difference. First operand 135 states and 139 transitions. Second operand 41 states. [2019-09-07 12:00:17,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:17,679 INFO L93 Difference]: Finished difference Result 229 states and 241 transitions. [2019-09-07 12:00:17,682 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2019-09-07 12:00:17,683 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 212 [2019-09-07 12:00:17,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:17,684 INFO L225 Difference]: With dead ends: 229 [2019-09-07 12:00:17,684 INFO L226 Difference]: Without dead ends: 141 [2019-09-07 12:00:17,684 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=442, Invalid=1198, Unknown=0, NotChecked=0, Total=1640 [2019-09-07 12:00:17,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2019-09-07 12:00:17,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 139. [2019-09-07 12:00:17,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2019-09-07 12:00:17,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 143 transitions. [2019-09-07 12:00:17,689 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 143 transitions. Word has length 212 [2019-09-07 12:00:17,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:17,690 INFO L475 AbstractCegarLoop]: Abstraction has 139 states and 143 transitions. [2019-09-07 12:00:17,690 INFO L476 AbstractCegarLoop]: Interpolant automaton has 41 states. [2019-09-07 12:00:17,690 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 143 transitions. [2019-09-07 12:00:17,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2019-09-07 12:00:17,692 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:17,692 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 21, 21, 19, 19, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:17,693 INFO L418 AbstractCegarLoop]: === Iteration 35 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:17,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:17,693 INFO L82 PathProgramCache]: Analyzing trace with hash 392683579, now seen corresponding path program 31 times [2019-09-07 12:00:17,693 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:17,693 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:17,694 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:00:17,694 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:18,012 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 3480 trivial. 0 not checked. [2019-09-07 12:00:18,013 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:18,013 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:00:18,031 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:18,129 INFO L256 TraceCheckSpWp]: Trace formula consists of 593 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:00:18,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:18,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3841 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3400 trivial. 0 not checked. [2019-09-07 12:00:18,531 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:18,532 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 24] total 44 [2019-09-07 12:00:18,533 INFO L454 AbstractCegarLoop]: Interpolant automaton has 44 states [2019-09-07 12:00:18,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2019-09-07 12:00:18,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:00:18,535 INFO L87 Difference]: Start difference. First operand 139 states and 143 transitions. Second operand 44 states. [2019-09-07 12:00:18,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:18,708 INFO L93 Difference]: Finished difference Result 235 states and 244 transitions. [2019-09-07 12:00:18,708 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2019-09-07 12:00:18,709 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 220 [2019-09-07 12:00:18,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:18,710 INFO L225 Difference]: With dead ends: 235 [2019-09-07 12:00:18,710 INFO L226 Difference]: Without dead ends: 145 [2019-09-07 12:00:18,712 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=506, Invalid=1386, Unknown=0, NotChecked=0, Total=1892 [2019-09-07 12:00:18,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2019-09-07 12:00:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2019-09-07 12:00:18,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2019-09-07 12:00:18,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2019-09-07 12:00:18,718 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 220 [2019-09-07 12:00:18,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:18,719 INFO L475 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2019-09-07 12:00:18,719 INFO L476 AbstractCegarLoop]: Interpolant automaton has 44 states. [2019-09-07 12:00:18,719 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2019-09-07 12:00:18,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2019-09-07 12:00:18,720 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:18,720 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 22, 22, 20, 20, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:18,721 INFO L418 AbstractCegarLoop]: === Iteration 36 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:18,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:18,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1874458469, now seen corresponding path program 32 times [2019-09-07 12:00:18,721 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:18,721 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:18,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:18,722 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:00:18,722 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:19,036 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 3523 trivial. 0 not checked. [2019-09-07 12:00:19,036 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:19,036 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:19,048 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:00:19,154 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:00:19,155 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:00:19,157 INFO L256 TraceCheckSpWp]: Trace formula consists of 603 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:00:19,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:19,615 INFO L134 CoverageAnalysis]: Checked inductivity of 3923 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3439 trivial. 0 not checked. [2019-09-07 12:00:19,619 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:19,619 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 46 [2019-09-07 12:00:19,619 INFO L454 AbstractCegarLoop]: Interpolant automaton has 46 states [2019-09-07 12:00:19,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2019-09-07 12:00:19,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:00:19,620 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand 46 states. [2019-09-07 12:00:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:19,828 INFO L93 Difference]: Finished difference Result 241 states and 250 transitions. [2019-09-07 12:00:19,835 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2019-09-07 12:00:19,835 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 224 [2019-09-07 12:00:19,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:19,837 INFO L225 Difference]: With dead ends: 241 [2019-09-07 12:00:19,837 INFO L226 Difference]: Without dead ends: 149 [2019-09-07 12:00:19,838 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=552, Invalid=1518, Unknown=0, NotChecked=0, Total=2070 [2019-09-07 12:00:19,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2019-09-07 12:00:19,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2019-09-07 12:00:19,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2019-09-07 12:00:19,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 151 transitions. [2019-09-07 12:00:19,844 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 151 transitions. Word has length 224 [2019-09-07 12:00:19,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:19,844 INFO L475 AbstractCegarLoop]: Abstraction has 147 states and 151 transitions. [2019-09-07 12:00:19,844 INFO L476 AbstractCegarLoop]: Interpolant automaton has 46 states. [2019-09-07 12:00:19,844 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 151 transitions. [2019-09-07 12:00:19,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2019-09-07 12:00:19,846 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:19,846 INFO L399 BasicCegarLoop]: trace histogram [54, 54, 23, 23, 21, 21, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:19,847 INFO L418 AbstractCegarLoop]: === Iteration 37 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:19,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:19,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1983031301, now seen corresponding path program 33 times [2019-09-07 12:00:19,847 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:19,847 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:19,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:19,848 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:00:19,848 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:19,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:20,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 3568 trivial. 0 not checked. [2019-09-07 12:00:20,246 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:20,246 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:00:20,266 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:22,591 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2019-09-07 12:00:22,591 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:00:22,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 20 conjunts are in the unsatisfiable core [2019-09-07 12:00:22,599 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:22,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4009 backedges. 1376 proven. 324 refuted. 0 times theorem prover too weak. 2309 trivial. 0 not checked. [2019-09-07 12:00:22,967 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:22,967 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21] total 43 [2019-09-07 12:00:22,967 INFO L454 AbstractCegarLoop]: Interpolant automaton has 43 states [2019-09-07 12:00:22,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2019-09-07 12:00:22,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:00:22,968 INFO L87 Difference]: Start difference. First operand 147 states and 151 transitions. Second operand 43 states. [2019-09-07 12:00:23,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:23,136 INFO L93 Difference]: Finished difference Result 246 states and 257 transitions. [2019-09-07 12:00:23,136 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2019-09-07 12:00:23,136 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 228 [2019-09-07 12:00:23,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:23,138 INFO L225 Difference]: With dead ends: 246 [2019-09-07 12:00:23,138 INFO L226 Difference]: Without dead ends: 153 [2019-09-07 12:00:23,139 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=485, Invalid=1321, Unknown=0, NotChecked=0, Total=1806 [2019-09-07 12:00:23,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2019-09-07 12:00:23,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 151. [2019-09-07 12:00:23,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2019-09-07 12:00:23,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 155 transitions. [2019-09-07 12:00:23,145 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 155 transitions. Word has length 228 [2019-09-07 12:00:23,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:23,145 INFO L475 AbstractCegarLoop]: Abstraction has 151 states and 155 transitions. [2019-09-07 12:00:23,145 INFO L476 AbstractCegarLoop]: Interpolant automaton has 43 states. [2019-09-07 12:00:23,145 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 155 transitions. [2019-09-07 12:00:23,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2019-09-07 12:00:23,147 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:23,147 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 23, 23, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:23,147 INFO L418 AbstractCegarLoop]: === Iteration 38 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:23,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:23,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1041406377, now seen corresponding path program 34 times [2019-09-07 12:00:23,148 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:23,148 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:23,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:23,148 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:00:23,149 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:23,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:23,507 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 12:00:23,508 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:23,508 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:00:23,521 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:23,624 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:00:23,624 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:00:23,626 INFO L256 TraceCheckSpWp]: Trace formula consists of 632 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:00:23,628 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:00:23,672 INFO L134 CoverageAnalysis]: Checked inductivity of 4391 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3862 trivial. 0 not checked. [2019-09-07 12:00:23,676 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:00:23,677 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2019-09-07 12:00:23,677 INFO L454 AbstractCegarLoop]: Interpolant automaton has 27 states [2019-09-07 12:00:23,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2019-09-07 12:00:23,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:00:23,678 INFO L87 Difference]: Start difference. First operand 151 states and 155 transitions. Second operand 27 states. [2019-09-07 12:00:23,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:00:23,766 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2019-09-07 12:00:23,767 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2019-09-07 12:00:23,767 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 236 [2019-09-07 12:00:23,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:00:23,768 INFO L225 Difference]: With dead ends: 252 [2019-09-07 12:00:23,768 INFO L226 Difference]: Without dead ends: 154 [2019-09-07 12:00:23,769 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2019-09-07 12:00:23,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2019-09-07 12:00:23,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2019-09-07 12:00:23,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2019-09-07 12:00:23,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2019-09-07 12:00:23,774 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 236 [2019-09-07 12:00:23,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:00:23,774 INFO L475 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2019-09-07 12:00:23,774 INFO L476 AbstractCegarLoop]: Interpolant automaton has 27 states. [2019-09-07 12:00:23,774 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2019-09-07 12:00:23,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-09-07 12:00:23,776 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:00:23,776 INFO L399 BasicCegarLoop]: trace histogram [57, 57, 24, 24, 22, 22, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:00:23,776 INFO L418 AbstractCegarLoop]: === Iteration 39 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:00:23,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:00:23,777 INFO L82 PathProgramCache]: Analyzing trace with hash 166203833, now seen corresponding path program 35 times [2019-09-07 12:00:23,777 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:00:23,777 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:00:23,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:23,778 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:00:23,778 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:00:23,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:00:24,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3954 trivial. 0 not checked. [2019-09-07 12:00:24,145 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:00:24,145 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:00:24,156 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:01:36,083 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2019-09-07 12:01:36,083 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:36,116 INFO L256 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 21 conjunts are in the unsatisfiable core [2019-09-07 12:01:36,119 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4438 backedges. 1524 proven. 361 refuted. 0 times theorem prover too weak. 2553 trivial. 0 not checked. [2019-09-07 12:01:36,522 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:36,523 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 22] total 45 [2019-09-07 12:01:36,523 INFO L454 AbstractCegarLoop]: Interpolant automaton has 45 states [2019-09-07 12:01:36,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2019-09-07 12:01:36,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:01:36,524 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand 45 states. [2019-09-07 12:01:36,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:36,699 INFO L93 Difference]: Finished difference Result 256 states and 267 transitions. [2019-09-07 12:01:36,699 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2019-09-07 12:01:36,700 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 238 [2019-09-07 12:01:36,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:36,701 INFO L225 Difference]: With dead ends: 256 [2019-09-07 12:01:36,701 INFO L226 Difference]: Without dead ends: 159 [2019-09-07 12:01:36,703 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=1450, Unknown=0, NotChecked=0, Total=1980 [2019-09-07 12:01:36,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2019-09-07 12:01:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2019-09-07 12:01:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2019-09-07 12:01:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 161 transitions. [2019-09-07 12:01:36,709 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 161 transitions. Word has length 238 [2019-09-07 12:01:36,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:36,710 INFO L475 AbstractCegarLoop]: Abstraction has 157 states and 161 transitions. [2019-09-07 12:01:36,710 INFO L476 AbstractCegarLoop]: Interpolant automaton has 45 states. [2019-09-07 12:01:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 161 transitions. [2019-09-07 12:01:36,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2019-09-07 12:01:36,712 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:36,712 INFO L399 BasicCegarLoop]: trace histogram [60, 60, 24, 24, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:36,712 INFO L418 AbstractCegarLoop]: === Iteration 40 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:36,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:36,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1921922795, now seen corresponding path program 36 times [2019-09-07 12:01:36,712 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:36,713 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:36,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:36,713 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:36,713 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:36,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:37,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4264 trivial. 0 not checked. [2019-09-07 12:01:37,183 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:37,183 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:37,211 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:01:44,302 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 41 check-sat command(s) [2019-09-07 12:01:44,303 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:44,312 INFO L256 TraceCheckSpWp]: Trace formula consists of 627 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:01:44,315 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:44,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4840 backedges. 1688 proven. 400 refuted. 0 times theorem prover too weak. 2752 trivial. 0 not checked. [2019-09-07 12:01:44,771 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:44,771 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23] total 48 [2019-09-07 12:01:44,771 INFO L454 AbstractCegarLoop]: Interpolant automaton has 48 states [2019-09-07 12:01:44,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2019-09-07 12:01:44,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:01:44,773 INFO L87 Difference]: Start difference. First operand 157 states and 161 transitions. Second operand 48 states. [2019-09-07 12:01:44,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:44,957 INFO L93 Difference]: Finished difference Result 265 states and 277 transitions. [2019-09-07 12:01:44,957 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2019-09-07 12:01:44,957 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 246 [2019-09-07 12:01:44,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:44,958 INFO L225 Difference]: With dead ends: 265 [2019-09-07 12:01:44,958 INFO L226 Difference]: Without dead ends: 163 [2019-09-07 12:01:44,960 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 504 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=603, Invalid=1653, Unknown=0, NotChecked=0, Total=2256 [2019-09-07 12:01:44,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2019-09-07 12:01:44,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 161. [2019-09-07 12:01:44,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2019-09-07 12:01:44,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2019-09-07 12:01:44,965 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 246 [2019-09-07 12:01:44,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:44,965 INFO L475 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2019-09-07 12:01:44,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 48 states. [2019-09-07 12:01:44,965 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2019-09-07 12:01:44,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2019-09-07 12:01:44,967 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:44,967 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 25, 25, 23, 23, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:44,967 INFO L418 AbstractCegarLoop]: === Iteration 41 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:44,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:44,968 INFO L82 PathProgramCache]: Analyzing trace with hash 901848917, now seen corresponding path program 37 times [2019-09-07 12:01:44,968 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:44,968 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:44,968 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:44,969 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:44,969 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:45,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:45,373 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 4735 trivial. 0 not checked. [2019-09-07 12:01:45,373 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:45,373 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:01:45,395 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:45,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:45,508 INFO L256 TraceCheckSpWp]: Trace formula consists of 678 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:01:45,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 5264 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4639 trivial. 0 not checked. [MP z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (39)] Exception during sending of exit command (exit): Broken pipe [2019-09-07 12:01:46,067 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:46,067 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 28] total 52 [2019-09-07 12:01:46,068 INFO L454 AbstractCegarLoop]: Interpolant automaton has 52 states [2019-09-07 12:01:46,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2019-09-07 12:01:46,069 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:01:46,069 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand 52 states. [2019-09-07 12:01:46,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:46,305 INFO L93 Difference]: Finished difference Result 271 states and 280 transitions. [2019-09-07 12:01:46,306 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2019-09-07 12:01:46,306 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 254 [2019-09-07 12:01:46,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:46,307 INFO L225 Difference]: With dead ends: 271 [2019-09-07 12:01:46,307 INFO L226 Difference]: Without dead ends: 167 [2019-09-07 12:01:46,308 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 229 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=702, Invalid=1950, Unknown=0, NotChecked=0, Total=2652 [2019-09-07 12:01:46,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2019-09-07 12:01:46,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 165. [2019-09-07 12:01:46,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2019-09-07 12:01:46,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 169 transitions. [2019-09-07 12:01:46,312 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 169 transitions. Word has length 254 [2019-09-07 12:01:46,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:46,313 INFO L475 AbstractCegarLoop]: Abstraction has 165 states and 169 transitions. [2019-09-07 12:01:46,313 INFO L476 AbstractCegarLoop]: Interpolant automaton has 52 states. [2019-09-07 12:01:46,313 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 169 transitions. [2019-09-07 12:01:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2019-09-07 12:01:46,314 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:46,314 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 26, 26, 24, 24, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:46,314 INFO L418 AbstractCegarLoop]: === Iteration 42 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:46,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:46,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1981474997, now seen corresponding path program 38 times [2019-09-07 12:01:46,315 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:46,315 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:46,315 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:46,315 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:01:46,316 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 4786 trivial. 0 not checked. [2019-09-07 12:01:46,759 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:46,759 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:46,770 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:01:46,892 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:01:46,893 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:46,895 INFO L256 TraceCheckSpWp]: Trace formula consists of 688 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:01:46,898 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 5362 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4686 trivial. 0 not checked. [2019-09-07 12:01:47,589 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:47,589 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29] total 54 [2019-09-07 12:01:47,590 INFO L454 AbstractCegarLoop]: Interpolant automaton has 54 states [2019-09-07 12:01:47,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2019-09-07 12:01:47,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:01:47,591 INFO L87 Difference]: Start difference. First operand 165 states and 169 transitions. Second operand 54 states. [2019-09-07 12:01:47,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:47,824 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2019-09-07 12:01:47,825 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2019-09-07 12:01:47,825 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 258 [2019-09-07 12:01:47,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:47,826 INFO L225 Difference]: With dead ends: 277 [2019-09-07 12:01:47,827 INFO L226 Difference]: Without dead ends: 171 [2019-09-07 12:01:47,828 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=756, Invalid=2106, Unknown=0, NotChecked=0, Total=2862 [2019-09-07 12:01:47,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2019-09-07 12:01:47,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 169. [2019-09-07 12:01:47,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2019-09-07 12:01:47,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 173 transitions. [2019-09-07 12:01:47,834 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 173 transitions. Word has length 258 [2019-09-07 12:01:47,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:47,834 INFO L475 AbstractCegarLoop]: Abstraction has 169 states and 173 transitions. [2019-09-07 12:01:47,834 INFO L476 AbstractCegarLoop]: Interpolant automaton has 54 states. [2019-09-07 12:01:47,834 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 173 transitions. [2019-09-07 12:01:47,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-09-07 12:01:47,835 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:47,836 INFO L399 BasicCegarLoop]: trace histogram [63, 63, 27, 27, 25, 25, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:47,836 INFO L418 AbstractCegarLoop]: === Iteration 43 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:47,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:47,836 INFO L82 PathProgramCache]: Analyzing trace with hash -645277419, now seen corresponding path program 39 times [2019-09-07 12:01:47,836 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:47,836 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:47,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:47,837 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:47,837 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:47,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:48,369 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 4839 trivial. 0 not checked. [2019-09-07 12:01:48,369 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:48,369 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:48,397 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:01:54,538 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2019-09-07 12:01:54,538 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:54,545 INFO L256 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 23 conjunts are in the unsatisfiable core [2019-09-07 12:01:54,549 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:55,158 INFO L134 CoverageAnalysis]: Checked inductivity of 5464 backedges. 1856 proven. 441 refuted. 0 times theorem prover too weak. 3167 trivial. 0 not checked. [2019-09-07 12:01:55,166 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:55,166 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 24] total 50 [2019-09-07 12:01:55,167 INFO L454 AbstractCegarLoop]: Interpolant automaton has 50 states [2019-09-07 12:01:55,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2019-09-07 12:01:55,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:01:55,167 INFO L87 Difference]: Start difference. First operand 169 states and 173 transitions. Second operand 50 states. [2019-09-07 12:01:55,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:55,369 INFO L93 Difference]: Finished difference Result 282 states and 293 transitions. [2019-09-07 12:01:55,370 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2019-09-07 12:01:55,370 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 262 [2019-09-07 12:01:55,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:55,371 INFO L225 Difference]: With dead ends: 282 [2019-09-07 12:01:55,371 INFO L226 Difference]: Without dead ends: 175 [2019-09-07 12:01:55,373 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 241 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=653, Invalid=1797, Unknown=0, NotChecked=0, Total=2450 [2019-09-07 12:01:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2019-09-07 12:01:55,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 173. [2019-09-07 12:01:55,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2019-09-07 12:01:55,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2019-09-07 12:01:55,378 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 262 [2019-09-07 12:01:55,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:55,379 INFO L475 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2019-09-07 12:01:55,379 INFO L476 AbstractCegarLoop]: Interpolant automaton has 50 states. [2019-09-07 12:01:55,379 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2019-09-07 12:01:55,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-09-07 12:01:55,380 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:55,381 INFO L399 BasicCegarLoop]: trace histogram [66, 66, 27, 27, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:55,381 INFO L418 AbstractCegarLoop]: === Iteration 44 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:55,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:55,381 INFO L82 PathProgramCache]: Analyzing trace with hash -637427343, now seen corresponding path program 40 times [2019-09-07 12:01:55,381 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:55,382 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:55,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:55,382 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:55,382 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5179 trivial. 0 not checked. [2019-09-07 12:01:55,833 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:55,833 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:55,845 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:01:55,964 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:01:55,964 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:01:55,966 INFO L256 TraceCheckSpWp]: Trace formula consists of 717 conjuncts, 24 conjunts are in the unsatisfiable core [2019-09-07 12:01:55,969 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:01:56,470 INFO L134 CoverageAnalysis]: Checked inductivity of 5908 backedges. 2032 proven. 484 refuted. 0 times theorem prover too weak. 3392 trivial. 0 not checked. [2019-09-07 12:01:56,474 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:01:56,474 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 25] total 53 [2019-09-07 12:01:56,475 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:01:56,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:01:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:01:56,476 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand 53 states. [2019-09-07 12:01:56,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:01:56,706 INFO L93 Difference]: Finished difference Result 291 states and 303 transitions. [2019-09-07 12:01:56,707 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:01:56,707 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 270 [2019-09-07 12:01:56,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:01:56,708 INFO L225 Difference]: With dead ends: 291 [2019-09-07 12:01:56,708 INFO L226 Difference]: Without dead ends: 179 [2019-09-07 12:01:56,709 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=734, Invalid=2022, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:01:56,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2019-09-07 12:01:56,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2019-09-07 12:01:56,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2019-09-07 12:01:56,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 181 transitions. [2019-09-07 12:01:56,716 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 181 transitions. Word has length 270 [2019-09-07 12:01:56,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:01:56,716 INFO L475 AbstractCegarLoop]: Abstraction has 177 states and 181 transitions. [2019-09-07 12:01:56,716 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:01:56,716 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 181 transitions. [2019-09-07 12:01:56,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2019-09-07 12:01:56,718 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:01:56,719 INFO L399 BasicCegarLoop]: trace histogram [69, 69, 28, 28, 26, 26, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:01:56,719 INFO L418 AbstractCegarLoop]: === Iteration 45 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:01:56,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:01:56,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1719002703, now seen corresponding path program 41 times [2019-09-07 12:01:56,719 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:01:56,720 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:01:56,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:56,720 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:01:56,720 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:01:56,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:01:57,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5698 trivial. 0 not checked. [2019-09-07 12:01:57,158 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:01:57,158 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:01:57,179 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:03:47,054 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2019-09-07 12:03:47,055 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:03:47,095 INFO L256 TraceCheckSpWp]: Trace formula consists of 676 conjuncts, 25 conjunts are in the unsatisfiable core [2019-09-07 12:03:47,098 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:03:47,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6374 backedges. 2212 proven. 529 refuted. 0 times theorem prover too weak. 3633 trivial. 0 not checked. [2019-09-07 12:03:47,624 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:03:47,624 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 26] total 53 [2019-09-07 12:03:47,625 INFO L454 AbstractCegarLoop]: Interpolant automaton has 53 states [2019-09-07 12:03:47,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2019-09-07 12:03:47,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:03:47,626 INFO L87 Difference]: Start difference. First operand 177 states and 181 transitions. Second operand 53 states. [2019-09-07 12:03:47,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:03:47,846 INFO L93 Difference]: Finished difference Result 296 states and 307 transitions. [2019-09-07 12:03:47,847 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2019-09-07 12:03:47,847 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 278 [2019-09-07 12:03:47,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:03:47,849 INFO L225 Difference]: With dead ends: 296 [2019-09-07 12:03:47,849 INFO L226 Difference]: Without dead ends: 183 [2019-09-07 12:03:47,850 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 306 GetRequests, 255 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=730, Invalid=2026, Unknown=0, NotChecked=0, Total=2756 [2019-09-07 12:03:47,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2019-09-07 12:03:47,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 181. [2019-09-07 12:03:47,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 181 states. [2019-09-07 12:03:47,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 185 transitions. [2019-09-07 12:03:47,854 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 185 transitions. Word has length 278 [2019-09-07 12:03:47,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:03:47,854 INFO L475 AbstractCegarLoop]: Abstraction has 181 states and 185 transitions. [2019-09-07 12:03:47,854 INFO L476 AbstractCegarLoop]: Interpolant automaton has 53 states. [2019-09-07 12:03:47,855 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 185 transitions. [2019-09-07 12:03:47,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2019-09-07 12:03:47,857 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:03:47,858 INFO L399 BasicCegarLoop]: trace histogram [72, 72, 28, 28, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:03:47,858 INFO L418 AbstractCegarLoop]: === Iteration 46 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:03:47,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:03:47,858 INFO L82 PathProgramCache]: Analyzing trace with hash -998574835, now seen corresponding path program 42 times [2019-09-07 12:03:47,858 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:03:47,858 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:03:47,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:47,859 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:03:47,859 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:03:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:03:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6072 trivial. 0 not checked. [2019-09-07 12:03:48,338 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:03:48,338 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:03:48,349 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:04:00,621 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2019-09-07 12:04:00,621 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:00,634 INFO L256 TraceCheckSpWp]: Trace formula consists of 727 conjuncts, 26 conjunts are in the unsatisfiable core [2019-09-07 12:04:00,637 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:01,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6856 backedges. 2408 proven. 576 refuted. 0 times theorem prover too weak. 3872 trivial. 0 not checked. [2019-09-07 12:04:01,201 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:01,201 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27] total 56 [2019-09-07 12:04:01,201 INFO L454 AbstractCegarLoop]: Interpolant automaton has 56 states [2019-09-07 12:04:01,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2019-09-07 12:04:01,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:04:01,202 INFO L87 Difference]: Start difference. First operand 181 states and 185 transitions. Second operand 56 states. [2019-09-07 12:04:01,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:01,464 INFO L93 Difference]: Finished difference Result 305 states and 317 transitions. [2019-09-07 12:04:01,465 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2019-09-07 12:04:01,465 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 286 [2019-09-07 12:04:01,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:01,466 INFO L225 Difference]: With dead ends: 305 [2019-09-07 12:04:01,466 INFO L226 Difference]: Without dead ends: 187 [2019-09-07 12:04:01,467 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 316 GetRequests, 262 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=815, Invalid=2265, Unknown=0, NotChecked=0, Total=3080 [2019-09-07 12:04:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2019-09-07 12:04:01,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 185. [2019-09-07 12:04:01,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2019-09-07 12:04:01,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2019-09-07 12:04:01,472 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 286 [2019-09-07 12:04:01,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:01,473 INFO L475 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2019-09-07 12:04:01,473 INFO L476 AbstractCegarLoop]: Interpolant automaton has 56 states. [2019-09-07 12:04:01,473 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2019-09-07 12:04:01,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2019-09-07 12:04:01,475 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:01,475 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 29, 29, 27, 27, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:01,475 INFO L418 AbstractCegarLoop]: === Iteration 47 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:01,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:01,476 INFO L82 PathProgramCache]: Analyzing trace with hash 549970765, now seen corresponding path program 43 times [2019-09-07 12:04:01,476 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:01,476 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:01,476 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:01,477 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:01,477 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:01,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 6631 trivial. 0 not checked. [2019-09-07 12:04:01,960 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:01,960 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:01,970 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:02,108 INFO L256 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:04:02,111 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:02,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7360 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6519 trivial. 0 not checked. [2019-09-07 12:04:02,869 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:02,869 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 32] total 60 [2019-09-07 12:04:02,870 INFO L454 AbstractCegarLoop]: Interpolant automaton has 60 states [2019-09-07 12:04:02,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2019-09-07 12:04:02,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:04:02,870 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand 60 states. [2019-09-07 12:04:03,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:03,134 INFO L93 Difference]: Finished difference Result 311 states and 320 transitions. [2019-09-07 12:04:03,134 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2019-09-07 12:04:03,135 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 294 [2019-09-07 12:04:03,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:03,136 INFO L225 Difference]: With dead ends: 311 [2019-09-07 12:04:03,136 INFO L226 Difference]: Without dead ends: 191 [2019-09-07 12:04:03,137 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 810 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=930, Invalid=2610, Unknown=0, NotChecked=0, Total=3540 [2019-09-07 12:04:03,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2019-09-07 12:04:03,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 189. [2019-09-07 12:04:03,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 189 states. [2019-09-07 12:04:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2019-09-07 12:04:03,142 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 294 [2019-09-07 12:04:03,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:03,142 INFO L475 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2019-09-07 12:04:03,142 INFO L476 AbstractCegarLoop]: Interpolant automaton has 60 states. [2019-09-07 12:04:03,142 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2019-09-07 12:04:03,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 299 [2019-09-07 12:04:03,146 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:03,146 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 30, 30, 28, 28, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:03,146 INFO L418 AbstractCegarLoop]: === Iteration 48 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:03,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:03,147 INFO L82 PathProgramCache]: Analyzing trace with hash 764978349, now seen corresponding path program 44 times [2019-09-07 12:04:03,147 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:03,147 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:03,147 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:03,148 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:04:03,148 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:03,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 6690 trivial. 0 not checked. [2019-09-07 12:04:03,674 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:03,675 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:03,684 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:04:03,825 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:04:03,825 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:03,828 INFO L256 TraceCheckSpWp]: Trace formula consists of 788 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:04:03,831 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7474 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 6574 trivial. 0 not checked. [2019-09-07 12:04:04,565 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:04,565 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 33] total 62 [2019-09-07 12:04:04,566 INFO L454 AbstractCegarLoop]: Interpolant automaton has 62 states [2019-09-07 12:04:04,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2019-09-07 12:04:04,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:04:04,567 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand 62 states. [2019-09-07 12:04:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:04,837 INFO L93 Difference]: Finished difference Result 317 states and 326 transitions. [2019-09-07 12:04:04,837 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2019-09-07 12:04:04,837 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 298 [2019-09-07 12:04:04,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:04,838 INFO L225 Difference]: With dead ends: 317 [2019-09-07 12:04:04,838 INFO L226 Difference]: Without dead ends: 195 [2019-09-07 12:04:04,839 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 268 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 868 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=2790, Unknown=0, NotChecked=0, Total=3782 [2019-09-07 12:04:04,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2019-09-07 12:04:04,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 193. [2019-09-07 12:04:04,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2019-09-07 12:04:04,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 197 transitions. [2019-09-07 12:04:04,846 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 197 transitions. Word has length 298 [2019-09-07 12:04:04,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:04,846 INFO L475 AbstractCegarLoop]: Abstraction has 193 states and 197 transitions. [2019-09-07 12:04:04,846 INFO L476 AbstractCegarLoop]: Interpolant automaton has 62 states. [2019-09-07 12:04:04,846 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 197 transitions. [2019-09-07 12:04:04,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 303 [2019-09-07 12:04:04,849 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:04,849 INFO L399 BasicCegarLoop]: trace histogram [75, 75, 31, 31, 29, 29, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:04,849 INFO L418 AbstractCegarLoop]: === Iteration 49 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:04,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:04,850 INFO L82 PathProgramCache]: Analyzing trace with hash -243954419, now seen corresponding path program 45 times [2019-09-07 12:04:04,850 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:04,850 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:04,850 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:04,851 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:04,851 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:04,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:05,355 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 6751 trivial. 0 not checked. [2019-09-07 12:04:05,356 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:05,356 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:05,365 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 [2019-09-07 12:04:27,753 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 26 check-sat command(s) [2019-09-07 12:04:27,753 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:27,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 585 conjuncts, 27 conjunts are in the unsatisfiable core [2019-09-07 12:04:27,766 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:28,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7592 backedges. 2608 proven. 625 refuted. 0 times theorem prover too weak. 4359 trivial. 0 not checked. [2019-09-07 12:04:28,352 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:28,352 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 28] total 58 [2019-09-07 12:04:28,353 INFO L454 AbstractCegarLoop]: Interpolant automaton has 58 states [2019-09-07 12:04:28,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2019-09-07 12:04:28,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2019-09-07 12:04:28,354 INFO L87 Difference]: Start difference. First operand 193 states and 197 transitions. Second operand 58 states. [2019-09-07 12:04:28,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:28,606 INFO L93 Difference]: Finished difference Result 322 states and 333 transitions. [2019-09-07 12:04:28,607 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2019-09-07 12:04:28,607 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 302 [2019-09-07 12:04:28,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:28,608 INFO L225 Difference]: With dead ends: 322 [2019-09-07 12:04:28,608 INFO L226 Difference]: Without dead ends: 199 [2019-09-07 12:04:28,609 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 277 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2019-09-07 12:04:28,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2019-09-07 12:04:28,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2019-09-07 12:04:28,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2019-09-07 12:04:28,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2019-09-07 12:04:28,615 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 302 [2019-09-07 12:04:28,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:28,615 INFO L475 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2019-09-07 12:04:28,616 INFO L476 AbstractCegarLoop]: Interpolant automaton has 58 states. [2019-09-07 12:04:28,616 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2019-09-07 12:04:28,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-09-07 12:04:28,617 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:28,618 INFO L399 BasicCegarLoop]: trace histogram [78, 78, 31, 31, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:28,618 INFO L418 AbstractCegarLoop]: === Iteration 50 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:28,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:28,618 INFO L82 PathProgramCache]: Analyzing trace with hash 947353961, now seen corresponding path program 46 times [2019-09-07 12:04:28,618 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:28,619 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:28,619 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:28,619 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:28,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:29,199 INFO L134 CoverageAnalysis]: Checked inductivity of 8116 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 7155 trivial. 0 not checked. [2019-09-07 12:04:29,199 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:29,199 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:04:29,212 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:04:29,356 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:04:29,356 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:04:29,359 INFO L256 TraceCheckSpWp]: Trace formula consists of 817 conjuncts, 28 conjunts are in the unsatisfiable core [2019-09-07 12:04:29,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:04:30,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8116 backedges. 2816 proven. 676 refuted. 0 times theorem prover too weak. 4624 trivial. 0 not checked. [2019-09-07 12:04:30,219 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:04:30,219 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 29] total 61 [2019-09-07 12:04:30,220 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 12:04:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 12:04:30,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:04:30,221 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand 61 states. [2019-09-07 12:04:30,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:04:30,518 INFO L93 Difference]: Finished difference Result 331 states and 343 transitions. [2019-09-07 12:04:30,518 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 12:04:30,518 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 310 [2019-09-07 12:04:30,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:04:30,520 INFO L225 Difference]: With dead ends: 331 [2019-09-07 12:04:30,520 INFO L226 Difference]: Without dead ends: 203 [2019-09-07 12:04:30,522 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=966, Invalid=2694, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:04:30,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2019-09-07 12:04:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2019-09-07 12:04:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2019-09-07 12:04:30,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 205 transitions. [2019-09-07 12:04:30,530 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 205 transitions. Word has length 310 [2019-09-07 12:04:30,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:04:30,530 INFO L475 AbstractCegarLoop]: Abstraction has 201 states and 205 transitions. [2019-09-07 12:04:30,530 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 12:04:30,531 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 205 transitions. [2019-09-07 12:04:30,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 319 [2019-09-07 12:04:30,534 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:04:30,534 INFO L399 BasicCegarLoop]: trace histogram [81, 81, 32, 32, 30, 30, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:04:30,535 INFO L418 AbstractCegarLoop]: === Iteration 51 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:04:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:04:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1171682903, now seen corresponding path program 47 times [2019-09-07 12:04:30,536 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:04:30,536 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:04:30,536 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:30,537 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:04:30,537 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:04:30,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:04:31,314 INFO L134 CoverageAnalysis]: Checked inductivity of 8662 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 7762 trivial. 0 not checked. [2019-09-07 12:04:31,315 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:04:31,315 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:04:31,337 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:28,831 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 56 check-sat command(s) [2019-09-07 12:07:28,831 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:28,886 INFO L256 TraceCheckSpWp]: Trace formula consists of 776 conjuncts, 29 conjunts are in the unsatisfiable core [2019-09-07 12:07:28,889 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:29,557 INFO L134 CoverageAnalysis]: Checked inductivity of 8662 backedges. 3028 proven. 729 refuted. 0 times theorem prover too weak. 4905 trivial. 0 not checked. [2019-09-07 12:07:29,599 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:29,600 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 30] total 61 [2019-09-07 12:07:29,600 INFO L454 AbstractCegarLoop]: Interpolant automaton has 61 states [2019-09-07 12:07:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2019-09-07 12:07:29,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:07:29,604 INFO L87 Difference]: Start difference. First operand 201 states and 205 transitions. Second operand 61 states. [2019-09-07 12:07:29,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:29,927 INFO L93 Difference]: Finished difference Result 336 states and 347 transitions. [2019-09-07 12:07:29,927 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2019-09-07 12:07:29,927 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 318 [2019-09-07 12:07:29,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:29,929 INFO L225 Difference]: With dead ends: 336 [2019-09-07 12:07:29,929 INFO L226 Difference]: Without dead ends: 207 [2019-09-07 12:07:29,930 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=962, Invalid=2698, Unknown=0, NotChecked=0, Total=3660 [2019-09-07 12:07:29,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2019-09-07 12:07:29,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 205. [2019-09-07 12:07:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 205 states. [2019-09-07 12:07:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 209 transitions. [2019-09-07 12:07:29,938 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 209 transitions. Word has length 318 [2019-09-07 12:07:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:29,938 INFO L475 AbstractCegarLoop]: Abstraction has 205 states and 209 transitions. [2019-09-07 12:07:29,939 INFO L476 AbstractCegarLoop]: Interpolant automaton has 61 states. [2019-09-07 12:07:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 209 transitions. [2019-09-07 12:07:29,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 327 [2019-09-07 12:07:29,942 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:29,942 INFO L399 BasicCegarLoop]: trace histogram [84, 84, 32, 32, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:29,943 INFO L418 AbstractCegarLoop]: === Iteration 52 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:29,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:29,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1823836421, now seen corresponding path program 48 times [2019-09-07 12:07:29,944 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:29,944 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:29,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:29,945 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:29,945 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:30,536 INFO L134 CoverageAnalysis]: Checked inductivity of 9224 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8200 trivial. 0 not checked. [2019-09-07 12:07:30,536 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:30,536 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:30,548 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE [2019-09-07 12:07:53,871 INFO L249 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 57 check-sat command(s) [2019-09-07 12:07:53,871 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:53,888 INFO L256 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 30 conjunts are in the unsatisfiable core [2019-09-07 12:07:53,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:54,621 INFO L134 CoverageAnalysis]: Checked inductivity of 9224 backedges. 3256 proven. 784 refuted. 0 times theorem prover too weak. 5184 trivial. 0 not checked. [2019-09-07 12:07:54,633 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:54,634 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31] total 64 [2019-09-07 12:07:54,634 INFO L454 AbstractCegarLoop]: Interpolant automaton has 64 states [2019-09-07 12:07:54,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2019-09-07 12:07:54,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 12:07:54,635 INFO L87 Difference]: Start difference. First operand 205 states and 209 transitions. Second operand 64 states. [2019-09-07 12:07:54,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:54,870 INFO L93 Difference]: Finished difference Result 345 states and 357 transitions. [2019-09-07 12:07:54,870 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2019-09-07 12:07:54,870 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 326 [2019-09-07 12:07:54,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:54,871 INFO L225 Difference]: With dead ends: 345 [2019-09-07 12:07:54,871 INFO L226 Difference]: Without dead ends: 211 [2019-09-07 12:07:54,872 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1059, Invalid=2973, Unknown=0, NotChecked=0, Total=4032 [2019-09-07 12:07:54,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2019-09-07 12:07:54,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 209. [2019-09-07 12:07:54,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2019-09-07 12:07:54,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 213 transitions. [2019-09-07 12:07:54,878 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 213 transitions. Word has length 326 [2019-09-07 12:07:54,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:54,878 INFO L475 AbstractCegarLoop]: Abstraction has 209 states and 213 transitions. [2019-09-07 12:07:54,878 INFO L476 AbstractCegarLoop]: Interpolant automaton has 64 states. [2019-09-07 12:07:54,878 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 213 transitions. [2019-09-07 12:07:54,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2019-09-07 12:07:54,880 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:54,880 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 33, 33, 31, 31, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:54,881 INFO L418 AbstractCegarLoop]: === Iteration 53 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:54,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:54,881 INFO L82 PathProgramCache]: Analyzing trace with hash 819990341, now seen corresponding path program 49 times [2019-09-07 12:07:54,881 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:54,881 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:54,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:54,882 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:54,882 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:54,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:55,502 INFO L134 CoverageAnalysis]: Checked inductivity of 9808 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 8847 trivial. 0 not checked. [2019-09-07 12:07:55,502 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:55,503 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:55,513 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:07:55,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:55,667 INFO L256 TraceCheckSpWp]: Trace formula consists of 878 conjuncts, 35 conjunts are in the unsatisfiable core [2019-09-07 12:07:55,670 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:56,566 INFO L134 CoverageAnalysis]: Checked inductivity of 9808 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8719 trivial. 0 not checked. [2019-09-07 12:07:56,572 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:56,573 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 36] total 68 [2019-09-07 12:07:56,574 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-07 12:07:56,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-07 12:07:56,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:07:56,575 INFO L87 Difference]: Start difference. First operand 209 states and 213 transitions. Second operand 68 states. [2019-09-07 12:07:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:56,899 INFO L93 Difference]: Finished difference Result 351 states and 360 transitions. [2019-09-07 12:07:56,900 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-07 12:07:56,900 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 334 [2019-09-07 12:07:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:56,902 INFO L225 Difference]: With dead ends: 351 [2019-09-07 12:07:56,902 INFO L226 Difference]: Without dead ends: 215 [2019-09-07 12:07:56,903 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 367 GetRequests, 301 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1190, Invalid=3366, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:07:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2019-09-07 12:07:56,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 213. [2019-09-07 12:07:56,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2019-09-07 12:07:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 217 transitions. [2019-09-07 12:07:56,911 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 217 transitions. Word has length 334 [2019-09-07 12:07:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:56,912 INFO L475 AbstractCegarLoop]: Abstraction has 213 states and 217 transitions. [2019-09-07 12:07:56,912 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-07 12:07:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 217 transitions. [2019-09-07 12:07:56,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2019-09-07 12:07:56,915 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:56,916 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 34, 34, 32, 32, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:56,916 INFO L418 AbstractCegarLoop]: === Iteration 54 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:56,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:56,917 INFO L82 PathProgramCache]: Analyzing trace with hash 1436534949, now seen corresponding path program 50 times [2019-09-07 12:07:56,917 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:56,917 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:56,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:56,918 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-07 12:07:56,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:57,547 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 8914 trivial. 0 not checked. [2019-09-07 12:07:57,548 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:57,548 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:07:57,558 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST1 [2019-09-07 12:07:57,711 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2019-09-07 12:07:57,711 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:07:57,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 36 conjunts are in the unsatisfiable core [2019-09-07 12:07:57,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:07:58,631 INFO L134 CoverageAnalysis]: Checked inductivity of 9938 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 8782 trivial. 0 not checked. [2019-09-07 12:07:58,635 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:07:58,636 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 37] total 70 [2019-09-07 12:07:58,636 INFO L454 AbstractCegarLoop]: Interpolant automaton has 70 states [2019-09-07 12:07:58,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2019-09-07 12:07:58,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:07:58,637 INFO L87 Difference]: Start difference. First operand 213 states and 217 transitions. Second operand 70 states. [2019-09-07 12:07:59,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:07:59,001 INFO L93 Difference]: Finished difference Result 357 states and 366 transitions. [2019-09-07 12:07:59,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2019-09-07 12:07:59,002 INFO L78 Accepts]: Start accepts. Automaton has 70 states. Word has length 338 [2019-09-07 12:07:59,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:07:59,004 INFO L225 Difference]: With dead ends: 357 [2019-09-07 12:07:59,004 INFO L226 Difference]: Without dead ends: 219 [2019-09-07 12:07:59,005 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1260, Invalid=3570, Unknown=0, NotChecked=0, Total=4830 [2019-09-07 12:07:59,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2019-09-07 12:07:59,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2019-09-07 12:07:59,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2019-09-07 12:07:59,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2019-09-07 12:07:59,012 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 338 [2019-09-07 12:07:59,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:07:59,012 INFO L475 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2019-09-07 12:07:59,012 INFO L476 AbstractCegarLoop]: Interpolant automaton has 70 states. [2019-09-07 12:07:59,012 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2019-09-07 12:07:59,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 343 [2019-09-07 12:07:59,015 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:07:59,015 INFO L399 BasicCegarLoop]: trace histogram [87, 87, 35, 35, 33, 33, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:07:59,015 INFO L418 AbstractCegarLoop]: === Iteration 55 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:07:59,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:07:59,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1906136827, now seen corresponding path program 51 times [2019-09-07 12:07:59,016 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:07:59,016 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:07:59,016 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:59,017 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:07:59,017 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:07:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:07:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 8983 trivial. 0 not checked. [2019-09-07 12:07:59,997 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:07:59,998 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) [2019-09-07 12:08:00,012 INFO L103 rtionOrderModulation]: Keeping assertion order OUTSIDE_LOOP_FIRST2 Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:08:08,072 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2019-09-07 12:08:08,073 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:08,083 INFO L256 TraceCheckSpWp]: Trace formula consists of 665 conjuncts, 31 conjunts are in the unsatisfiable core [2019-09-07 12:08:08,085 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:08:08,863 INFO L134 CoverageAnalysis]: Checked inductivity of 10072 backedges. 3488 proven. 841 refuted. 0 times theorem prover too weak. 5743 trivial. 0 not checked. [2019-09-07 12:08:08,873 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:08:08,873 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 32] total 66 [2019-09-07 12:08:08,874 INFO L454 AbstractCegarLoop]: Interpolant automaton has 66 states [2019-09-07 12:08:08,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2019-09-07 12:08:08,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1125, Invalid=3165, Unknown=0, NotChecked=0, Total=4290 [2019-09-07 12:08:08,874 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand 66 states. [2019-09-07 12:08:09,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:08:09,175 INFO L93 Difference]: Finished difference Result 362 states and 373 transitions. [2019-09-07 12:08:09,176 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2019-09-07 12:08:09,176 INFO L78 Accepts]: Start accepts. Automaton has 66 states. Word has length 342 [2019-09-07 12:08:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:08:09,177 INFO L225 Difference]: With dead ends: 362 [2019-09-07 12:08:09,177 INFO L226 Difference]: Without dead ends: 223 [2019-09-07 12:08:09,178 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1125, Invalid=3165, Unknown=0, NotChecked=0, Total=4290 [2019-09-07 12:08:09,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2019-09-07 12:08:09,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 221. [2019-09-07 12:08:09,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 221 states. [2019-09-07 12:08:09,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 225 transitions. [2019-09-07 12:08:09,184 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 225 transitions. Word has length 342 [2019-09-07 12:08:09,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:08:09,184 INFO L475 AbstractCegarLoop]: Abstraction has 221 states and 225 transitions. [2019-09-07 12:08:09,184 INFO L476 AbstractCegarLoop]: Interpolant automaton has 66 states. [2019-09-07 12:08:09,184 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 225 transitions. [2019-09-07 12:08:09,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 351 [2019-09-07 12:08:09,186 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:08:09,186 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 35, 35, 34, 34, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:08:09,187 INFO L418 AbstractCegarLoop]: === Iteration 56 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:08:09,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:08:09,187 INFO L82 PathProgramCache]: Analyzing trace with hash -819807903, now seen corresponding path program 52 times [2019-09-07 12:08:09,187 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:08:09,187 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:08:09,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:09,188 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:08:09,188 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:09,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:08:09,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9451 trivial. 0 not checked. [2019-09-07 12:08:09,866 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:08:09,866 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:08:09,877 INFO L103 rtionOrderModulation]: Keeping assertion order TERMS_WITH_SMALL_CONSTANTS_FIRST [2019-09-07 12:08:10,038 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-09-07 12:08:10,039 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:08:10,041 INFO L256 TraceCheckSpWp]: Trace formula consists of 917 conjuncts, 37 conjunts are in the unsatisfiable core [2019-09-07 12:08:10,044 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:08:10,104 INFO L134 CoverageAnalysis]: Checked inductivity of 10676 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 9451 trivial. 0 not checked. [2019-09-07 12:08:10,108 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:08:10,108 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2019-09-07 12:08:10,109 INFO L454 AbstractCegarLoop]: Interpolant automaton has 39 states [2019-09-07 12:08:10,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2019-09-07 12:08:10,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:08:10,110 INFO L87 Difference]: Start difference. First operand 221 states and 225 transitions. Second operand 39 states. [2019-09-07 12:08:10,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:08:10,227 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2019-09-07 12:08:10,228 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2019-09-07 12:08:10,229 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 350 [2019-09-07 12:08:10,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:08:10,230 INFO L225 Difference]: With dead ends: 368 [2019-09-07 12:08:10,230 INFO L226 Difference]: Without dead ends: 224 [2019-09-07 12:08:10,231 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2019-09-07 12:08:10,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2019-09-07 12:08:10,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2019-09-07 12:08:10,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2019-09-07 12:08:10,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 227 transitions. [2019-09-07 12:08:10,237 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 227 transitions. Word has length 350 [2019-09-07 12:08:10,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:08:10,237 INFO L475 AbstractCegarLoop]: Abstraction has 223 states and 227 transitions. [2019-09-07 12:08:10,237 INFO L476 AbstractCegarLoop]: Interpolant automaton has 39 states. [2019-09-07 12:08:10,237 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 227 transitions. [2019-09-07 12:08:10,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 353 [2019-09-07 12:08:10,240 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:08:10,240 INFO L399 BasicCegarLoop]: trace histogram [90, 90, 36, 36, 34, 34, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:08:10,240 INFO L418 AbstractCegarLoop]: === Iteration 57 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:08:10,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:08:10,241 INFO L82 PathProgramCache]: Analyzing trace with hash -833226685, now seen corresponding path program 53 times [2019-09-07 12:08:10,241 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:08:10,241 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:08:10,241 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:10,242 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:08:10,242 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:08:10,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:08:10,876 INFO L134 CoverageAnalysis]: Checked inductivity of 10747 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 9591 trivial. 0 not checked. [2019-09-07 12:08:10,876 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:08:10,876 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:08:10,886 INFO L103 rtionOrderModulation]: Keeping assertion order INSIDE_LOOP_FIRST1 [2019-09-07 12:12:11,748 INFO L249 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 62 check-sat command(s) [2019-09-07 12:12:11,748 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-09-07 12:12:11,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 861 conjuncts, 32 conjunts are in the unsatisfiable core [2019-09-07 12:12:11,815 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-09-07 12:12:12,624 INFO L134 CoverageAnalysis]: Checked inductivity of 10747 backedges. 3724 proven. 900 refuted. 0 times theorem prover too weak. 6123 trivial. 0 not checked. [2019-09-07 12:12:12,655 INFO L312 seRefinementStrategy]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2019-09-07 12:12:12,655 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33] total 68 [2019-09-07 12:12:12,655 INFO L454 AbstractCegarLoop]: Interpolant automaton has 68 states [2019-09-07 12:12:12,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2019-09-07 12:12:12,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1193, Invalid=3363, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:12:12,656 INFO L87 Difference]: Start difference. First operand 223 states and 227 transitions. Second operand 68 states. [2019-09-07 12:12:12,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-07 12:12:12,954 INFO L93 Difference]: Finished difference Result 372 states and 383 transitions. [2019-09-07 12:12:12,954 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2019-09-07 12:12:12,954 INFO L78 Accepts]: Start accepts. Automaton has 68 states. Word has length 352 [2019-09-07 12:12:12,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-07 12:12:12,956 INFO L225 Difference]: With dead ends: 372 [2019-09-07 12:12:12,956 INFO L226 Difference]: Without dead ends: 229 [2019-09-07 12:12:12,957 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 322 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1193, Invalid=3363, Unknown=0, NotChecked=0, Total=4556 [2019-09-07 12:12:12,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2019-09-07 12:12:12,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2019-09-07 12:12:12,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2019-09-07 12:12:12,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 231 transitions. [2019-09-07 12:12:12,964 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 231 transitions. Word has length 352 [2019-09-07 12:12:12,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-07 12:12:12,965 INFO L475 AbstractCegarLoop]: Abstraction has 227 states and 231 transitions. [2019-09-07 12:12:12,965 INFO L476 AbstractCegarLoop]: Interpolant automaton has 68 states. [2019-09-07 12:12:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 231 transitions. [2019-09-07 12:12:12,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 361 [2019-09-07 12:12:12,968 INFO L391 BasicCegarLoop]: Found error trace [2019-09-07 12:12:12,968 INFO L399 BasicCegarLoop]: trace histogram [93, 93, 36, 36, 35, 35, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-09-07 12:12:12,969 INFO L418 AbstractCegarLoop]: === Iteration 58 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-07 12:12:12,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-07 12:12:12,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1625443937, now seen corresponding path program 54 times [2019-09-07 12:12:12,969 INFO L223 ckRefinementStrategy]: Switched to mode SMTINTERPOL_TREE_INTERPOLANTS [2019-09-07 12:12:12,969 INFO L69 tionRefinementEngine]: Using refinement strategy CamelRefinementStrategy [2019-09-07 12:12:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:12,970 INFO L101 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2019-09-07 12:12:12,970 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-07 12:12:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-07 12:12:13,822 INFO L134 CoverageAnalysis]: Checked inductivity of 11371 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 10075 trivial. 0 not checked. [2019-09-07 12:12:13,822 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-07 12:12:13,823 INFO L223 ckRefinementStrategy]: Switched to mode Z3_FP No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true -t:12000 [2019-09-07 12:12:13,833 INFO L103 rtionOrderModulation]: Keeping assertion order MIX_INSIDE_OUTSIDE