/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-267fbe0 [2020-07-17 17:21:57,624 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-07-17 17:21:57,627 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-07-17 17:21:57,639 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-07-17 17:21:57,640 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-07-17 17:21:57,641 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-07-17 17:21:57,642 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-07-17 17:21:57,644 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-07-17 17:21:57,645 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-07-17 17:21:57,646 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-07-17 17:21:57,647 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-07-17 17:21:57,648 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-07-17 17:21:57,649 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-07-17 17:21:57,650 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-07-17 17:21:57,651 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-07-17 17:21:57,652 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-07-17 17:21:57,653 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-07-17 17:21:57,654 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-07-17 17:21:57,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-07-17 17:21:57,657 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-07-17 17:21:57,659 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-07-17 17:21:57,660 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-07-17 17:21:57,662 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-07-17 17:21:57,663 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-07-17 17:21:57,665 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-07-17 17:21:57,673 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-07-17 17:21:57,674 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-07-17 17:21:57,674 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-07-17 17:21:57,675 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-07-17 17:21:57,685 INFO L113 SettingsManager]: Loading preferences was successful [2020-07-17 17:21:57,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-07-17 17:21:57,686 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-07-17 17:21:57,686 INFO L138 SettingsManager]: * sizeof long=4 [2020-07-17 17:21:57,686 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-07-17 17:21:57,687 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-07-17 17:21:57,687 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-07-17 17:21:57,687 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-07-17 17:21:57,687 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-07-17 17:21:57,687 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-07-17 17:21:57,688 INFO L138 SettingsManager]: * sizeof long double=12 [2020-07-17 17:21:57,688 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-07-17 17:21:57,688 INFO L138 SettingsManager]: * Use constant arrays=true [2020-07-17 17:21:57,688 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-07-17 17:21:57,688 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-07-17 17:21:57,689 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-07-17 17:21:57,689 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-07-17 17:21:57,689 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-07-17 17:21:57,689 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-07-17 17:21:57,689 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-07-17 17:21:57,690 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-07-17 17:21:57,690 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-07-17 17:21:57,690 INFO L138 SettingsManager]: * Use separate solver for trace checks=false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-07-17 17:21:57,977 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2020-07-17 17:21:57,990 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-07-17 17:21:57,994 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-07-17 17:21:57,995 INFO L271 PluginConnector]: Initializing CDTParser... [2020-07-17 17:21:57,996 INFO L275 PluginConnector]: CDTParser initialized [2020-07-17 17:21:57,997 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-17 17:21:58,088 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4186b9ae/4952be00a4ff468c931e3c82b9441166/FLAG8c3cde72c [2020-07-17 17:21:58,579 INFO L306 CDTParser]: Found 1 translation units. [2020-07-17 17:21:58,581 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/recursive-simple/id_i25_o25-2.c [2020-07-17 17:21:58,588 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4186b9ae/4952be00a4ff468c931e3c82b9441166/FLAG8c3cde72c [2020-07-17 17:21:58,926 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d4186b9ae/4952be00a4ff468c931e3c82b9441166 [2020-07-17 17:21:58,937 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-07-17 17:21:58,940 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-07-17 17:21:58,941 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:58,941 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-07-17 17:21:58,945 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-07-17 17:21:58,946 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:58" (1/1) ... [2020-07-17 17:21:58,949 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@756d2fec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:58, skipping insertion in model container [2020-07-17 17:21:58,950 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.07 05:21:58" (1/1) ... [2020-07-17 17:21:58,958 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-07-17 17:21:58,978 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-07-17 17:21:59,130 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:59,136 INFO L203 MainTranslator]: Completed pre-run [2020-07-17 17:21:59,151 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-07-17 17:21:59,168 INFO L208 MainTranslator]: Completed translation [2020-07-17 17:21:59,168 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59 WrapperNode [2020-07-17 17:21:59,169 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-07-17 17:21:59,170 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-07-17 17:21:59,170 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-07-17 17:21:59,170 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-07-17 17:21:59,185 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,191 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,192 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,195 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,198 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,198 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (1/1) ... [2020-07-17 17:21:59,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-07-17 17:21:59,200 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-07-17 17:21:59,200 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-07-17 17:21:59,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-07-17 17:21:59,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (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 [2020-07-17 17:21:59,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-07-17 17:21:59,355 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-07-17 17:21:59,356 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2020-07-17 17:21:59,356 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure id [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-07-17 17:21:59,356 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-07-17 17:21:59,533 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-07-17 17:21:59,534 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-07-17 17:21:59,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:59 BoogieIcfgContainer [2020-07-17 17:21:59,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-07-17 17:21:59,556 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-07-17 17:21:59,557 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-07-17 17:21:59,567 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-07-17 17:21:59,568 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.07 05:21:58" (1/3) ... [2020-07-17 17:21:59,572 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef1a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:59, skipping insertion in model container [2020-07-17 17:21:59,573 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.07 05:21:59" (2/3) ... [2020-07-17 17:21:59,573 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ef1a583 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.07 05:21:59, skipping insertion in model container [2020-07-17 17:21:59,574 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.07 05:21:59" (3/3) ... [2020-07-17 17:21:59,576 INFO L109 eAbstractionObserver]: Analyzing ICFG id_i25_o25-2.c [2020-07-17 17:21:59,610 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-07-17 17:21:59,629 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-07-17 17:21:59,657 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-07-17 17:21:59,684 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-07-17 17:21:59,685 INFO L376 AbstractCegarLoop]: Hoare is true [2020-07-17 17:21:59,685 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-07-17 17:21:59,685 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-07-17 17:21:59,685 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-07-17 17:21:59,686 INFO L380 AbstractCegarLoop]: Difference is false [2020-07-17 17:21:59,686 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-07-17 17:21:59,686 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-07-17 17:21:59,708 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states. [2020-07-17 17:21:59,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-07-17 17:21:59,724 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:21:59,725 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:21:59,726 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:21:59,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:21:59,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1037734449, now seen corresponding path program 1 times [2020-07-17 17:21:59,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:21:59,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1992269672] [2020-07-17 17:21:59,741 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:21:59,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:59,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:21:59,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-07-17 17:21:59,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1992269672] [2020-07-17 17:21:59,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-07-17 17:21:59,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-07-17 17:21:59,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056955546] [2020-07-17 17:22:00,001 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-07-17 17:22:00,002 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:00,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-07-17 17:22:00,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-07-17 17:22:00,015 INFO L87 Difference]: Start difference. First operand 25 states. Second operand 5 states. [2020-07-17 17:22:00,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:00,103 INFO L93 Difference]: Finished difference Result 37 states and 40 transitions. [2020-07-17 17:22:00,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-07-17 17:22:00,105 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-07-17 17:22:00,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:00,114 INFO L225 Difference]: With dead ends: 37 [2020-07-17 17:22:00,115 INFO L226 Difference]: Without dead ends: 23 [2020-07-17 17:22:00,119 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:00,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-07-17 17:22:00,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-07-17 17:22:00,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-07-17 17:22:00,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2020-07-17 17:22:00,169 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 16 [2020-07-17 17:22:00,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:00,170 INFO L479 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2020-07-17 17:22:00,170 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-07-17 17:22:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2020-07-17 17:22:00,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-07-17 17:22:00,172 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:00,173 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:00,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-07-17 17:22:00,173 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1478812441, now seen corresponding path program 1 times [2020-07-17 17:22:00,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:00,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048420264] [2020-07-17 17:22:00,175 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:00,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-07-17 17:22:00,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048420264] [2020-07-17 17:22:00,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:00,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-07-17 17:22:00,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366405078] [2020-07-17 17:22:00,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-07-17 17:22:00,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:00,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-07-17 17:22:00,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-07-17 17:22:00,305 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand 6 states. [2020-07-17 17:22:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:00,373 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2020-07-17 17:22:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-07-17 17:22:00,374 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 24 [2020-07-17 17:22:00,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:00,375 INFO L225 Difference]: With dead ends: 34 [2020-07-17 17:22:00,376 INFO L226 Difference]: Without dead ends: 28 [2020-07-17 17:22:00,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-07-17 17:22:00,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-07-17 17:22:00,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-07-17 17:22:00,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2020-07-17 17:22:00,391 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 24 [2020-07-17 17:22:00,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:00,393 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2020-07-17 17:22:00,393 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-07-17 17:22:00,393 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2020-07-17 17:22:00,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-07-17 17:22:00,395 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:00,395 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:00,396 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-07-17 17:22:00,397 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:00,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:00,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1463730447, now seen corresponding path program 2 times [2020-07-17 17:22:00,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:00,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879729412] [2020-07-17 17:22:00,398 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:00,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,584 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-07-17 17:22:00,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879729412] [2020-07-17 17:22:00,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:00,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-07-17 17:22:00,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772096525] [2020-07-17 17:22:00,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-07-17 17:22:00,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:00,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-07-17 17:22:00,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-07-17 17:22:00,588 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand 7 states. [2020-07-17 17:22:00,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:00,660 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2020-07-17 17:22:00,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-07-17 17:22:00,661 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-07-17 17:22:00,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:00,662 INFO L225 Difference]: With dead ends: 39 [2020-07-17 17:22:00,662 INFO L226 Difference]: Without dead ends: 33 [2020-07-17 17:22:00,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:00,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-07-17 17:22:00,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-07-17 17:22:00,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-07-17 17:22:00,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-07-17 17:22:00,679 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 32 [2020-07-17 17:22:00,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:00,682 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-07-17 17:22:00,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-07-17 17:22:00,682 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-07-17 17:22:00,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-07-17 17:22:00,684 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:00,684 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:00,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-07-17 17:22:00,686 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:00,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:00,686 INFO L82 PathProgramCache]: Analyzing trace with hash 23346727, now seen corresponding path program 3 times [2020-07-17 17:22:00,687 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:00,687 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [955051394] [2020-07-17 17:22:00,687 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-07-17 17:22:00,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [955051394] [2020-07-17 17:22:00,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:00,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-07-17 17:22:00,936 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835303104] [2020-07-17 17:22:00,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-07-17 17:22:00,937 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:00,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-07-17 17:22:00,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-07-17 17:22:00,938 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 8 states. [2020-07-17 17:22:01,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:01,054 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2020-07-17 17:22:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-07-17 17:22:01,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 40 [2020-07-17 17:22:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:01,056 INFO L225 Difference]: With dead ends: 44 [2020-07-17 17:22:01,057 INFO L226 Difference]: Without dead ends: 38 [2020-07-17 17:22:01,057 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-07-17 17:22:01,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-07-17 17:22:01,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-07-17 17:22:01,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2020-07-17 17:22:01,068 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 40 [2020-07-17 17:22:01,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:01,069 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2020-07-17 17:22:01,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-07-17 17:22:01,069 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2020-07-17 17:22:01,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-07-17 17:22:01,071 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:01,071 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:01,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-07-17 17:22:01,072 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:01,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:01,072 INFO L82 PathProgramCache]: Analyzing trace with hash -649675855, now seen corresponding path program 4 times [2020-07-17 17:22:01,072 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:01,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [870159081] [2020-07-17 17:22:01,073 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:01,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,237 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-07-17 17:22:01,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [870159081] [2020-07-17 17:22:01,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:01,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-07-17 17:22:01,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540749896] [2020-07-17 17:22:01,239 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-07-17 17:22:01,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:01,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-07-17 17:22:01,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-07-17 17:22:01,240 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand 9 states. [2020-07-17 17:22:01,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:01,353 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2020-07-17 17:22:01,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-07-17 17:22:01,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 48 [2020-07-17 17:22:01,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:01,357 INFO L225 Difference]: With dead ends: 49 [2020-07-17 17:22:01,357 INFO L226 Difference]: Without dead ends: 43 [2020-07-17 17:22:01,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:01,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-07-17 17:22:01,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-07-17 17:22:01,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-07-17 17:22:01,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2020-07-17 17:22:01,387 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 48 [2020-07-17 17:22:01,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:01,388 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2020-07-17 17:22:01,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-07-17 17:22:01,388 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2020-07-17 17:22:01,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-07-17 17:22:01,393 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:01,393 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:01,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-07-17 17:22:01,394 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:01,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:01,394 INFO L82 PathProgramCache]: Analyzing trace with hash 899977063, now seen corresponding path program 5 times [2020-07-17 17:22:01,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:01,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751869355] [2020-07-17 17:22:01,395 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,603 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2020-07-17 17:22:01,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751869355] [2020-07-17 17:22:01,604 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:01,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-07-17 17:22:01,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455161287] [2020-07-17 17:22:01,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-07-17 17:22:01,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:01,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-07-17 17:22:01,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-07-17 17:22:01,607 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand 10 states. [2020-07-17 17:22:01,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:01,701 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2020-07-17 17:22:01,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-07-17 17:22:01,701 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 56 [2020-07-17 17:22:01,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:01,703 INFO L225 Difference]: With dead ends: 54 [2020-07-17 17:22:01,703 INFO L226 Difference]: Without dead ends: 48 [2020-07-17 17:22:01,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=154, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:22:01,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-07-17 17:22:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-07-17 17:22:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-07-17 17:22:01,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2020-07-17 17:22:01,716 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 56 [2020-07-17 17:22:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:01,717 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2020-07-17 17:22:01,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-07-17 17:22:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2020-07-17 17:22:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-07-17 17:22:01,719 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:01,719 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:01,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-07-17 17:22:01,720 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:01,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:01,720 INFO L82 PathProgramCache]: Analyzing trace with hash 1000802417, now seen corresponding path program 6 times [2020-07-17 17:22:01,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:01,721 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366455928] [2020-07-17 17:22:01,721 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:01,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:01,943 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2020-07-17 17:22:01,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366455928] [2020-07-17 17:22:01,944 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:01,944 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-07-17 17:22:01,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385375831] [2020-07-17 17:22:01,945 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-07-17 17:22:01,945 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:01,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-07-17 17:22:01,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-07-17 17:22:01,946 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand 11 states. [2020-07-17 17:22:02,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:02,047 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2020-07-17 17:22:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-07-17 17:22:02,048 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 64 [2020-07-17 17:22:02,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:02,050 INFO L225 Difference]: With dead ends: 59 [2020-07-17 17:22:02,050 INFO L226 Difference]: Without dead ends: 53 [2020-07-17 17:22:02,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:22:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-07-17 17:22:02,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-07-17 17:22:02,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-07-17 17:22:02,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2020-07-17 17:22:02,061 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 64 [2020-07-17 17:22:02,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:02,061 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2020-07-17 17:22:02,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-07-17 17:22:02,062 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2020-07-17 17:22:02,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-07-17 17:22:02,063 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:02,063 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:02,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-07-17 17:22:02,064 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:02,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:02,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1977618599, now seen corresponding path program 7 times [2020-07-17 17:22:02,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:02,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256837633] [2020-07-17 17:22:02,065 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,269 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2020-07-17 17:22:02,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256837633] [2020-07-17 17:22:02,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:02,270 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-07-17 17:22:02,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506335998] [2020-07-17 17:22:02,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-07-17 17:22:02,271 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:02,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-07-17 17:22:02,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-07-17 17:22:02,271 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand 12 states. [2020-07-17 17:22:02,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:02,385 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-07-17 17:22:02,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-07-17 17:22:02,386 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 72 [2020-07-17 17:22:02,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:02,387 INFO L225 Difference]: With dead ends: 64 [2020-07-17 17:22:02,388 INFO L226 Difference]: Without dead ends: 58 [2020-07-17 17:22:02,389 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=243, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:22:02,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-07-17 17:22:02,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2020-07-17 17:22:02,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-07-17 17:22:02,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2020-07-17 17:22:02,399 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 72 [2020-07-17 17:22:02,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:02,400 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2020-07-17 17:22:02,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-07-17 17:22:02,400 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2020-07-17 17:22:02,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-07-17 17:22:02,402 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:02,402 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:02,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-07-17 17:22:02,402 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:02,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:02,403 INFO L82 PathProgramCache]: Analyzing trace with hash 555623729, now seen corresponding path program 8 times [2020-07-17 17:22:02,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:02,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090761647] [2020-07-17 17:22:02,403 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:02,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-07-17 17:22:02,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090761647] [2020-07-17 17:22:02,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:02,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-07-17 17:22:02,679 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272636506] [2020-07-17 17:22:02,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-07-17 17:22:02,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:02,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-07-17 17:22:02,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-07-17 17:22:02,681 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand 13 states. [2020-07-17 17:22:02,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:02,804 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2020-07-17 17:22:02,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-07-17 17:22:02,805 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 80 [2020-07-17 17:22:02,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:02,806 INFO L225 Difference]: With dead ends: 69 [2020-07-17 17:22:02,806 INFO L226 Difference]: Without dead ends: 63 [2020-07-17 17:22:02,808 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:22:02,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-07-17 17:22:02,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-07-17 17:22:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-07-17 17:22:02,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-07-17 17:22:02,817 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 80 [2020-07-17 17:22:02,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:02,818 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-07-17 17:22:02,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-07-17 17:22:02,818 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-07-17 17:22:02,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-07-17 17:22:02,820 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:02,820 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:02,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-07-17 17:22:02,820 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:02,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:02,821 INFO L82 PathProgramCache]: Analyzing trace with hash 777699815, now seen corresponding path program 9 times [2020-07-17 17:22:02,821 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:02,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660380602] [2020-07-17 17:22:02,821 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:02,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,123 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2020-07-17 17:22:03,124 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660380602] [2020-07-17 17:22:03,124 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:03,124 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-07-17 17:22:03,125 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838341364] [2020-07-17 17:22:03,125 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-07-17 17:22:03,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:03,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-07-17 17:22:03,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-07-17 17:22:03,126 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 14 states. [2020-07-17 17:22:03,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:03,261 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2020-07-17 17:22:03,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-07-17 17:22:03,261 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 88 [2020-07-17 17:22:03,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:03,262 INFO L225 Difference]: With dead ends: 74 [2020-07-17 17:22:03,263 INFO L226 Difference]: Without dead ends: 68 [2020-07-17 17:22:03,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=352, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:22:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-07-17 17:22:03,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2020-07-17 17:22:03,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-07-17 17:22:03,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2020-07-17 17:22:03,273 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 88 [2020-07-17 17:22:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:03,273 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2020-07-17 17:22:03,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-07-17 17:22:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2020-07-17 17:22:03,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-07-17 17:22:03,275 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:03,275 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:03,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-07-17 17:22:03,276 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:03,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:03,276 INFO L82 PathProgramCache]: Analyzing trace with hash 2145915377, now seen corresponding path program 10 times [2020-07-17 17:22:03,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:03,277 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802948331] [2020-07-17 17:22:03,277 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:03,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 245 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2020-07-17 17:22:03,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802948331] [2020-07-17 17:22:03,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:03,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-07-17 17:22:03,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041869586] [2020-07-17 17:22:03,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-07-17 17:22:03,640 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:03,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-07-17 17:22:03,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-07-17 17:22:03,642 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand 15 states. [2020-07-17 17:22:03,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:03,813 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2020-07-17 17:22:03,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-07-17 17:22:03,815 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 96 [2020-07-17 17:22:03,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:03,817 INFO L225 Difference]: With dead ends: 79 [2020-07-17 17:22:03,817 INFO L226 Difference]: Without dead ends: 73 [2020-07-17 17:22:03,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=236, Invalid=414, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:22:03,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-07-17 17:22:03,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-07-17 17:22:03,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-07-17 17:22:03,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2020-07-17 17:22:03,837 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 96 [2020-07-17 17:22:03,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:03,838 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2020-07-17 17:22:03,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-07-17 17:22:03,838 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2020-07-17 17:22:03,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-07-17 17:22:03,840 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:03,840 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:03,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-07-17 17:22:03,842 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:03,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:03,842 INFO L82 PathProgramCache]: Analyzing trace with hash 1180214055, now seen corresponding path program 11 times [2020-07-17 17:22:03,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:03,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1982553342] [2020-07-17 17:22:03,844 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:03,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 297 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2020-07-17 17:22:04,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1982553342] [2020-07-17 17:22:04,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:04,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-07-17 17:22:04,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1802824444] [2020-07-17 17:22:04,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-07-17 17:22:04,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:04,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-07-17 17:22:04,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-07-17 17:22:04,323 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand 16 states. [2020-07-17 17:22:04,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:04,527 INFO L93 Difference]: Finished difference Result 84 states and 85 transitions. [2020-07-17 17:22:04,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-07-17 17:22:04,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 104 [2020-07-17 17:22:04,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:04,529 INFO L225 Difference]: With dead ends: 84 [2020-07-17 17:22:04,529 INFO L226 Difference]: Without dead ends: 78 [2020-07-17 17:22:04,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=275, Invalid=481, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:22:04,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-07-17 17:22:04,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-07-17 17:22:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-07-17 17:22:04,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-07-17 17:22:04,554 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 104 [2020-07-17 17:22:04,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:04,555 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-07-17 17:22:04,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-07-17 17:22:04,555 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-07-17 17:22:04,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-07-17 17:22:04,557 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:04,558 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:04,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-07-17 17:22:04,558 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:04,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:04,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1287598415, now seen corresponding path program 12 times [2020-07-17 17:22:04,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:04,560 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404415224] [2020-07-17 17:22:04,560 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:04,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:04,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,111 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2020-07-17 17:22:05,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404415224] [2020-07-17 17:22:05,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:05,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-07-17 17:22:05,112 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420001862] [2020-07-17 17:22:05,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-07-17 17:22:05,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:05,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-07-17 17:22:05,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-07-17 17:22:05,114 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-07-17 17:22:05,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:05,302 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2020-07-17 17:22:05,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-07-17 17:22:05,303 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 112 [2020-07-17 17:22:05,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:05,304 INFO L225 Difference]: With dead ends: 89 [2020-07-17 17:22:05,304 INFO L226 Difference]: Without dead ends: 83 [2020-07-17 17:22:05,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=317, Invalid=553, Unknown=0, NotChecked=0, Total=870 [2020-07-17 17:22:05,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-07-17 17:22:05,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-07-17 17:22:05,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-07-17 17:22:05,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 84 transitions. [2020-07-17 17:22:05,327 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 84 transitions. Word has length 112 [2020-07-17 17:22:05,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:05,327 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 84 transitions. [2020-07-17 17:22:05,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-07-17 17:22:05,328 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 84 transitions. [2020-07-17 17:22:05,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-07-17 17:22:05,333 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:05,333 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:05,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-07-17 17:22:05,333 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1612559463, now seen corresponding path program 13 times [2020-07-17 17:22:05,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:05,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410978086] [2020-07-17 17:22:05,339 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:05,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 416 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2020-07-17 17:22:05,929 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410978086] [2020-07-17 17:22:05,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:05,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-07-17 17:22:05,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847098472] [2020-07-17 17:22:05,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-07-17 17:22:05,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:05,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-07-17 17:22:05,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-07-17 17:22:05,933 INFO L87 Difference]: Start difference. First operand 83 states and 84 transitions. Second operand 18 states. [2020-07-17 17:22:06,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:06,147 INFO L93 Difference]: Finished difference Result 94 states and 95 transitions. [2020-07-17 17:22:06,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-07-17 17:22:06,148 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 120 [2020-07-17 17:22:06,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:06,149 INFO L225 Difference]: With dead ends: 94 [2020-07-17 17:22:06,149 INFO L226 Difference]: Without dead ends: 88 [2020-07-17 17:22:06,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=362, Invalid=630, Unknown=0, NotChecked=0, Total=992 [2020-07-17 17:22:06,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-07-17 17:22:06,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2020-07-17 17:22:06,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-07-17 17:22:06,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2020-07-17 17:22:06,159 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 120 [2020-07-17 17:22:06,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:06,160 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2020-07-17 17:22:06,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-07-17 17:22:06,160 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2020-07-17 17:22:06,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-07-17 17:22:06,161 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:06,162 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:06,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-07-17 17:22:06,162 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:06,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:06,163 INFO L82 PathProgramCache]: Analyzing trace with hash 996432753, now seen corresponding path program 14 times [2020-07-17 17:22:06,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:06,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068847986] [2020-07-17 17:22:06,163 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:06,850 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 483 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2020-07-17 17:22:06,850 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068847986] [2020-07-17 17:22:06,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:06,851 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-07-17 17:22:06,851 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682494311] [2020-07-17 17:22:06,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-07-17 17:22:06,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-07-17 17:22:06,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-07-17 17:22:06,854 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand 19 states. [2020-07-17 17:22:07,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:07,082 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2020-07-17 17:22:07,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-07-17 17:22:07,082 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 128 [2020-07-17 17:22:07,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:07,084 INFO L225 Difference]: With dead ends: 99 [2020-07-17 17:22:07,084 INFO L226 Difference]: Without dead ends: 93 [2020-07-17 17:22:07,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=410, Invalid=712, Unknown=0, NotChecked=0, Total=1122 [2020-07-17 17:22:07,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-07-17 17:22:07,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2020-07-17 17:22:07,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-07-17 17:22:07,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 94 transitions. [2020-07-17 17:22:07,094 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 94 transitions. Word has length 128 [2020-07-17 17:22:07,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:07,094 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 94 transitions. [2020-07-17 17:22:07,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-07-17 17:22:07,094 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 94 transitions. [2020-07-17 17:22:07,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-07-17 17:22:07,096 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:07,096 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:07,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-07-17 17:22:07,096 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:07,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:07,097 INFO L82 PathProgramCache]: Analyzing trace with hash 418248103, now seen corresponding path program 15 times [2020-07-17 17:22:07,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:07,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657636326] [2020-07-17 17:22:07,097 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:07,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,689 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 555 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2020-07-17 17:22:07,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657636326] [2020-07-17 17:22:07,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:07,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-07-17 17:22:07,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980510393] [2020-07-17 17:22:07,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-07-17 17:22:07,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:07,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-07-17 17:22:07,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-07-17 17:22:07,692 INFO L87 Difference]: Start difference. First operand 93 states and 94 transitions. Second operand 20 states. [2020-07-17 17:22:07,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:07,939 INFO L93 Difference]: Finished difference Result 104 states and 105 transitions. [2020-07-17 17:22:07,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-07-17 17:22:07,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 136 [2020-07-17 17:22:07,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:07,941 INFO L225 Difference]: With dead ends: 104 [2020-07-17 17:22:07,941 INFO L226 Difference]: Without dead ends: 98 [2020-07-17 17:22:07,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=461, Invalid=799, Unknown=0, NotChecked=0, Total=1260 [2020-07-17 17:22:07,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-07-17 17:22:07,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2020-07-17 17:22:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-07-17 17:22:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2020-07-17 17:22:07,951 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 136 [2020-07-17 17:22:07,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:07,951 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2020-07-17 17:22:07,951 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-07-17 17:22:07,952 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2020-07-17 17:22:07,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-07-17 17:22:07,954 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:07,954 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:07,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-07-17 17:22:07,954 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:07,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:07,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2106505265, now seen corresponding path program 16 times [2020-07-17 17:22:07,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:07,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428335366] [2020-07-17 17:22:07,955 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:07,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:07,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 632 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-07-17 17:22:08,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428335366] [2020-07-17 17:22:08,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:08,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-07-17 17:22:08,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259380313] [2020-07-17 17:22:08,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-07-17 17:22:08,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:08,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-07-17 17:22:08,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-07-17 17:22:08,688 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand 21 states. [2020-07-17 17:22:08,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:08,923 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2020-07-17 17:22:08,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-07-17 17:22:08,923 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 144 [2020-07-17 17:22:08,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:08,925 INFO L225 Difference]: With dead ends: 109 [2020-07-17 17:22:08,925 INFO L226 Difference]: Without dead ends: 103 [2020-07-17 17:22:08,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=515, Invalid=891, Unknown=0, NotChecked=0, Total=1406 [2020-07-17 17:22:08,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-07-17 17:22:08,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2020-07-17 17:22:08,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-07-17 17:22:08,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2020-07-17 17:22:08,934 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 144 [2020-07-17 17:22:08,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:08,935 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2020-07-17 17:22:08,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-07-17 17:22:08,935 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2020-07-17 17:22:08,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-07-17 17:22:08,937 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:08,937 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:08,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-07-17 17:22:08,938 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:08,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:08,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1225615079, now seen corresponding path program 17 times [2020-07-17 17:22:08,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:08,939 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637133168] [2020-07-17 17:22:08,939 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:08,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:08,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:09,853 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 714 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2020-07-17 17:22:09,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637133168] [2020-07-17 17:22:09,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:09,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-07-17 17:22:09,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262370673] [2020-07-17 17:22:09,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-07-17 17:22:09,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:09,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-07-17 17:22:09,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-07-17 17:22:09,856 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand 22 states. [2020-07-17 17:22:10,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:10,209 INFO L93 Difference]: Finished difference Result 114 states and 115 transitions. [2020-07-17 17:22:10,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-07-17 17:22:10,210 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 152 [2020-07-17 17:22:10,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:10,212 INFO L225 Difference]: With dead ends: 114 [2020-07-17 17:22:10,212 INFO L226 Difference]: Without dead ends: 108 [2020-07-17 17:22:10,215 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=572, Invalid=988, Unknown=0, NotChecked=0, Total=1560 [2020-07-17 17:22:10,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-07-17 17:22:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-07-17 17:22:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-07-17 17:22:10,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2020-07-17 17:22:10,230 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 152 [2020-07-17 17:22:10,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:10,231 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2020-07-17 17:22:10,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-07-17 17:22:10,232 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2020-07-17 17:22:10,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-07-17 17:22:10,236 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:10,236 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:10,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-07-17 17:22:10,236 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -2080643855, now seen corresponding path program 18 times [2020-07-17 17:22:10,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:10,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263301233] [2020-07-17 17:22:10,241 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:10,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:10,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,304 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2020-07-17 17:22:11,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263301233] [2020-07-17 17:22:11,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:11,306 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-07-17 17:22:11,306 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949433120] [2020-07-17 17:22:11,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-07-17 17:22:11,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:11,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-07-17 17:22:11,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-07-17 17:22:11,311 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand 23 states. [2020-07-17 17:22:11,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:11,644 INFO L93 Difference]: Finished difference Result 119 states and 120 transitions. [2020-07-17 17:22:11,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-07-17 17:22:11,645 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 160 [2020-07-17 17:22:11,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:11,646 INFO L225 Difference]: With dead ends: 119 [2020-07-17 17:22:11,646 INFO L226 Difference]: Without dead ends: 113 [2020-07-17 17:22:11,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=632, Invalid=1090, Unknown=0, NotChecked=0, Total=1722 [2020-07-17 17:22:11,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-07-17 17:22:11,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2020-07-17 17:22:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-07-17 17:22:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 114 transitions. [2020-07-17 17:22:11,660 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 114 transitions. Word has length 160 [2020-07-17 17:22:11,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:11,660 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 114 transitions. [2020-07-17 17:22:11,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-07-17 17:22:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 114 transitions. [2020-07-17 17:22:11,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-07-17 17:22:11,662 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:11,663 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:11,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-07-17 17:22:11,663 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:11,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:11,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1136658471, now seen corresponding path program 19 times [2020-07-17 17:22:11,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:11,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1228955218] [2020-07-17 17:22:11,664 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:11,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:11,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 893 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2020-07-17 17:22:12,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1228955218] [2020-07-17 17:22:12,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:12,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-07-17 17:22:12,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766170051] [2020-07-17 17:22:12,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-07-17 17:22:12,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:12,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-07-17 17:22:12,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-07-17 17:22:12,605 INFO L87 Difference]: Start difference. First operand 113 states and 114 transitions. Second operand 24 states. [2020-07-17 17:22:12,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:12,908 INFO L93 Difference]: Finished difference Result 124 states and 125 transitions. [2020-07-17 17:22:12,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-07-17 17:22:12,908 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 168 [2020-07-17 17:22:12,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:12,909 INFO L225 Difference]: With dead ends: 124 [2020-07-17 17:22:12,910 INFO L226 Difference]: Without dead ends: 118 [2020-07-17 17:22:12,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=695, Invalid=1197, Unknown=0, NotChecked=0, Total=1892 [2020-07-17 17:22:12,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-07-17 17:22:12,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 118. [2020-07-17 17:22:12,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-07-17 17:22:12,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2020-07-17 17:22:12,924 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 168 [2020-07-17 17:22:12,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:12,925 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2020-07-17 17:22:12,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-07-17 17:22:12,926 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2020-07-17 17:22:12,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-07-17 17:22:12,927 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:12,928 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:12,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-07-17 17:22:12,928 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:12,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:12,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1108876879, now seen corresponding path program 20 times [2020-07-17 17:22:12,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:12,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108660984] [2020-07-17 17:22:12,929 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:12,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:13,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2020-07-17 17:22:13,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108660984] [2020-07-17 17:22:13,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:13,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-07-17 17:22:13,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286652094] [2020-07-17 17:22:13,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-07-17 17:22:13,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:13,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-07-17 17:22:13,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-07-17 17:22:13,945 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand 25 states. [2020-07-17 17:22:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:14,269 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2020-07-17 17:22:14,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-07-17 17:22:14,270 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 176 [2020-07-17 17:22:14,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:14,271 INFO L225 Difference]: With dead ends: 129 [2020-07-17 17:22:14,271 INFO L226 Difference]: Without dead ends: 123 [2020-07-17 17:22:14,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=761, Invalid=1309, Unknown=0, NotChecked=0, Total=2070 [2020-07-17 17:22:14,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-07-17 17:22:14,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2020-07-17 17:22:14,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-07-17 17:22:14,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 124 transitions. [2020-07-17 17:22:14,282 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 124 transitions. Word has length 176 [2020-07-17 17:22:14,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:14,283 INFO L479 AbstractCegarLoop]: Abstraction has 123 states and 124 transitions. [2020-07-17 17:22:14,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-07-17 17:22:14,284 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 124 transitions. [2020-07-17 17:22:14,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-07-17 17:22:14,285 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:14,286 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:14,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-07-17 17:22:14,286 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:14,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:14,286 INFO L82 PathProgramCache]: Analyzing trace with hash 390715751, now seen corresponding path program 21 times [2020-07-17 17:22:14,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:14,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953561049] [2020-07-17 17:22:14,287 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:14,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1092 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2020-07-17 17:22:15,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953561049] [2020-07-17 17:22:15,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:15,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-07-17 17:22:15,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151501751] [2020-07-17 17:22:15,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-07-17 17:22:15,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-07-17 17:22:15,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-07-17 17:22:15,458 INFO L87 Difference]: Start difference. First operand 123 states and 124 transitions. Second operand 26 states. [2020-07-17 17:22:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:15,800 INFO L93 Difference]: Finished difference Result 134 states and 135 transitions. [2020-07-17 17:22:15,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-07-17 17:22:15,804 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 184 [2020-07-17 17:22:15,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:15,805 INFO L225 Difference]: With dead ends: 134 [2020-07-17 17:22:15,805 INFO L226 Difference]: Without dead ends: 128 [2020-07-17 17:22:15,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=830, Invalid=1426, Unknown=0, NotChecked=0, Total=2256 [2020-07-17 17:22:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-07-17 17:22:15,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2020-07-17 17:22:15,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-07-17 17:22:15,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2020-07-17 17:22:15,819 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 184 [2020-07-17 17:22:15,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:15,820 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2020-07-17 17:22:15,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-07-17 17:22:15,820 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2020-07-17 17:22:15,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-07-17 17:22:15,821 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:15,822 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:15,822 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-07-17 17:22:15,822 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:15,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:15,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1081168271, now seen corresponding path program 22 times [2020-07-17 17:22:15,823 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:15,824 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457344509] [2020-07-17 17:22:15,825 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:15,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:16,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,047 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1199 refuted. 0 times theorem prover too weak. 737 trivial. 0 not checked. [2020-07-17 17:22:17,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457344509] [2020-07-17 17:22:17,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:17,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-07-17 17:22:17,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899461614] [2020-07-17 17:22:17,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-07-17 17:22:17,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:17,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-07-17 17:22:17,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-07-17 17:22:17,049 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand 27 states. [2020-07-17 17:22:17,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:17,423 INFO L93 Difference]: Finished difference Result 139 states and 140 transitions. [2020-07-17 17:22:17,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-07-17 17:22:17,424 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 192 [2020-07-17 17:22:17,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:17,425 INFO L225 Difference]: With dead ends: 139 [2020-07-17 17:22:17,425 INFO L226 Difference]: Without dead ends: 133 [2020-07-17 17:22:17,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=902, Invalid=1548, Unknown=0, NotChecked=0, Total=2450 [2020-07-17 17:22:17,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-07-17 17:22:17,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2020-07-17 17:22:17,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-07-17 17:22:17,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2020-07-17 17:22:17,435 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 192 [2020-07-17 17:22:17,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:17,435 INFO L479 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2020-07-17 17:22:17,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-07-17 17:22:17,435 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2020-07-17 17:22:17,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-07-17 17:22:17,436 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:17,436 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:17,436 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-07-17 17:22:17,436 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:17,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash -856761689, now seen corresponding path program 23 times [2020-07-17 17:22:17,437 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:17,437 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987301817] [2020-07-17 17:22:17,437 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:17,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:18,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 1311 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2020-07-17 17:22:18,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987301817] [2020-07-17 17:22:18,569 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:18,569 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-07-17 17:22:18,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557188061] [2020-07-17 17:22:18,570 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-07-17 17:22:18,570 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:18,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-07-17 17:22:18,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-07-17 17:22:18,571 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand 28 states. [2020-07-17 17:22:18,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:18,950 INFO L93 Difference]: Finished difference Result 144 states and 145 transitions. [2020-07-17 17:22:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-07-17 17:22:18,951 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 200 [2020-07-17 17:22:18,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:18,953 INFO L225 Difference]: With dead ends: 144 [2020-07-17 17:22:18,953 INFO L226 Difference]: Without dead ends: 138 [2020-07-17 17:22:18,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=977, Invalid=1675, Unknown=0, NotChecked=0, Total=2652 [2020-07-17 17:22:18,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-07-17 17:22:18,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-07-17 17:22:18,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-07-17 17:22:18,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2020-07-17 17:22:18,963 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 200 [2020-07-17 17:22:18,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:18,964 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2020-07-17 17:22:18,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-07-17 17:22:18,964 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2020-07-17 17:22:18,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-07-17 17:22:18,965 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:18,966 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:18,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-07-17 17:22:18,966 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:18,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash 36457265, now seen corresponding path program 24 times [2020-07-17 17:22:18,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:18,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97140742] [2020-07-17 17:22:18,967 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:18,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:19,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-07-17 17:22:20,208 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 1428 refuted. 0 times theorem prover too weak. 876 trivial. 0 not checked. [2020-07-17 17:22:20,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97140742] [2020-07-17 17:22:20,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-07-17 17:22:20,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-07-17 17:22:20,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610946524] [2020-07-17 17:22:20,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-07-17 17:22:20,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-07-17 17:22:20,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-07-17 17:22:20,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-07-17 17:22:20,211 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand 29 states. [2020-07-17 17:22:20,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-07-17 17:22:20,618 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2020-07-17 17:22:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-07-17 17:22:20,621 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 208 [2020-07-17 17:22:20,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-07-17 17:22:20,622 INFO L225 Difference]: With dead ends: 149 [2020-07-17 17:22:20,622 INFO L226 Difference]: Without dead ends: 143 [2020-07-17 17:22:20,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1055, Invalid=1807, Unknown=0, NotChecked=0, Total=2862 [2020-07-17 17:22:20,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-07-17 17:22:20,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2020-07-17 17:22:20,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-07-17 17:22:20,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 144 transitions. [2020-07-17 17:22:20,633 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 144 transitions. Word has length 208 [2020-07-17 17:22:20,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-07-17 17:22:20,633 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 144 transitions. [2020-07-17 17:22:20,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-07-17 17:22:20,633 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 144 transitions. [2020-07-17 17:22:20,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-07-17 17:22:20,635 INFO L414 BasicCegarLoop]: Found error trace [2020-07-17 17:22:20,635 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-07-17 17:22:20,635 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-07-17 17:22:20,635 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-07-17 17:22:20,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-07-17 17:22:20,636 INFO L82 PathProgramCache]: Analyzing trace with hash -1460466713, now seen corresponding path program 25 times [2020-07-17 17:22:20,636 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-07-17 17:22:20,636 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044628731] [2020-07-17 17:22:20,636 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-07-17 17:22:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-07-17 17:22:20,733 INFO L174 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2020-07-17 17:22:20,733 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-07-17 17:22:20,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-07-17 17:22:20,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.07 05:22:20 BoogieIcfgContainer [2020-07-17 17:22:20,795 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-07-17 17:22:20,797 INFO L168 Benchmark]: Toolchain (without parser) took 21858.28 ms. Allocated memory was 144.7 MB in the beginning and 708.8 MB in the end (delta: 564.1 MB). Free memory was 103.0 MB in the beginning and 477.1 MB in the end (delta: -374.2 MB). Peak memory consumption was 190.0 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,798 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,798 INFO L168 Benchmark]: CACSL2BoogieTranslator took 228.07 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,799 INFO L168 Benchmark]: Boogie Preprocessor took 30.36 ms. Allocated memory is still 144.7 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,800 INFO L168 Benchmark]: RCFGBuilder took 351.06 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.1 MB in the beginning and 170.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,800 INFO L168 Benchmark]: TraceAbstraction took 21238.69 ms. Allocated memory was 202.4 MB in the beginning and 708.8 MB in the end (delta: 506.5 MB). Free memory was 170.6 MB in the beginning and 477.1 MB in the end (delta: -306.6 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. [2020-07-17 17:22:20,802 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 144.7 MB. Free memory was 121.2 MB in the beginning and 121.0 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 228.07 ms. Allocated memory is still 144.7 MB. Free memory was 102.5 MB in the beginning and 93.4 MB in the end (delta: 9.1 MB). Peak memory consumption was 9.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 30.36 ms. Allocated memory is still 144.7 MB. Free memory was 93.4 MB in the beginning and 92.1 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 351.06 ms. Allocated memory was 144.7 MB in the beginning and 202.4 MB in the end (delta: 57.7 MB). Free memory was 92.1 MB in the beginning and 170.6 MB in the end (delta: -78.5 MB). Peak memory consumption was 10.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 21238.69 ms. Allocated memory was 202.4 MB in the beginning and 708.8 MB in the end (delta: 506.5 MB). Free memory was 170.6 MB in the beginning and 477.1 MB in the end (delta: -306.6 MB). Peak memory consumption was 199.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 13]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L10] int input = 25; VAL [input=25] [L11] CALL, EXPR id(input) VAL [\old(x)=25] [L5] COND FALSE !(x==0) VAL [\old(x)=25, x=25] [L6] CALL, EXPR id(x-1) VAL [\old(x)=24] [L5] COND FALSE !(x==0) VAL [\old(x)=24, x=24] [L6] CALL, EXPR id(x-1) VAL [\old(x)=23] [L5] COND FALSE !(x==0) VAL [\old(x)=23, x=23] [L6] CALL, EXPR id(x-1) VAL [\old(x)=22] [L5] COND FALSE !(x==0) VAL [\old(x)=22, x=22] [L6] CALL, EXPR id(x-1) VAL [\old(x)=21] [L5] COND FALSE !(x==0) VAL [\old(x)=21, x=21] [L6] CALL, EXPR id(x-1) VAL [\old(x)=20] [L5] COND FALSE !(x==0) VAL [\old(x)=20, x=20] [L6] CALL, EXPR id(x-1) VAL [\old(x)=19] [L5] COND FALSE !(x==0) VAL [\old(x)=19, x=19] [L6] CALL, EXPR id(x-1) VAL [\old(x)=18] [L5] COND FALSE !(x==0) VAL [\old(x)=18, x=18] [L6] CALL, EXPR id(x-1) VAL [\old(x)=17] [L5] COND FALSE !(x==0) VAL [\old(x)=17, x=17] [L6] CALL, EXPR id(x-1) VAL [\old(x)=16] [L5] COND FALSE !(x==0) VAL [\old(x)=16, x=16] [L6] CALL, EXPR id(x-1) VAL [\old(x)=15] [L5] COND FALSE !(x==0) VAL [\old(x)=15, x=15] [L6] CALL, EXPR id(x-1) VAL [\old(x)=14] [L5] COND FALSE !(x==0) VAL [\old(x)=14, x=14] [L6] CALL, EXPR id(x-1) VAL [\old(x)=13] [L5] COND FALSE !(x==0) VAL [\old(x)=13, x=13] [L6] CALL, EXPR id(x-1) VAL [\old(x)=12] [L5] COND FALSE !(x==0) VAL [\old(x)=12, x=12] [L6] CALL, EXPR id(x-1) VAL [\old(x)=11] [L5] COND FALSE !(x==0) VAL [\old(x)=11, x=11] [L6] CALL, EXPR id(x-1) VAL [\old(x)=10] [L5] COND FALSE !(x==0) VAL [\old(x)=10, x=10] [L6] CALL, EXPR id(x-1) VAL [\old(x)=9] [L5] COND FALSE !(x==0) VAL [\old(x)=9, x=9] [L6] CALL, EXPR id(x-1) VAL [\old(x)=8] [L5] COND FALSE !(x==0) VAL [\old(x)=8, x=8] [L6] CALL, EXPR id(x-1) VAL [\old(x)=7] [L5] COND FALSE !(x==0) VAL [\old(x)=7, x=7] [L6] CALL, EXPR id(x-1) VAL [\old(x)=6] [L5] COND FALSE !(x==0) VAL [\old(x)=6, x=6] [L6] CALL, EXPR id(x-1) VAL [\old(x)=5] [L5] COND FALSE !(x==0) VAL [\old(x)=5, x=5] [L6] CALL, EXPR id(x-1) VAL [\old(x)=4] [L5] COND FALSE !(x==0) VAL [\old(x)=4, x=4] [L6] CALL, EXPR id(x-1) VAL [\old(x)=3] [L5] COND FALSE !(x==0) VAL [\old(x)=3, x=3] [L6] CALL, EXPR id(x-1) VAL [\old(x)=2] [L5] COND FALSE !(x==0) VAL [\old(x)=2, x=2] [L6] CALL, EXPR id(x-1) VAL [\old(x)=1] [L5] COND FALSE !(x==0) VAL [\old(x)=1, x=1] [L6] CALL, EXPR id(x-1) VAL [\old(x)=0] [L5] COND TRUE x==0 VAL [\old(x)=0, x=0] [L5] return 0; VAL [\old(x)=0, \result=0, x=0] [L6] RET, EXPR id(x-1) VAL [\old(x)=1, id(x-1)=0, x=1] [L6] return id(x-1) + 1; VAL [\old(x)=1, \result=1, id(x-1)=0, x=1] [L6] RET, EXPR id(x-1) VAL [\old(x)=2, id(x-1)=1, x=2] [L6] return id(x-1) + 1; VAL [\old(x)=2, \result=2, id(x-1)=1, x=2] [L6] RET, EXPR id(x-1) VAL [\old(x)=3, id(x-1)=2, x=3] [L6] return id(x-1) + 1; VAL [\old(x)=3, \result=3, id(x-1)=2, x=3] [L6] RET, EXPR id(x-1) VAL [\old(x)=4, id(x-1)=3, x=4] [L6] return id(x-1) + 1; VAL [\old(x)=4, \result=4, id(x-1)=3, x=4] [L6] RET, EXPR id(x-1) VAL [\old(x)=5, id(x-1)=4, x=5] [L6] return id(x-1) + 1; VAL [\old(x)=5, \result=5, id(x-1)=4, x=5] [L6] RET, EXPR id(x-1) VAL [\old(x)=6, id(x-1)=5, x=6] [L6] return id(x-1) + 1; VAL [\old(x)=6, \result=6, id(x-1)=5, x=6] [L6] RET, EXPR id(x-1) VAL [\old(x)=7, id(x-1)=6, x=7] [L6] return id(x-1) + 1; VAL [\old(x)=7, \result=7, id(x-1)=6, x=7] [L6] RET, EXPR id(x-1) VAL [\old(x)=8, id(x-1)=7, x=8] [L6] return id(x-1) + 1; VAL [\old(x)=8, \result=8, id(x-1)=7, x=8] [L6] RET, EXPR id(x-1) VAL [\old(x)=9, id(x-1)=8, x=9] [L6] return id(x-1) + 1; VAL [\old(x)=9, \result=9, id(x-1)=8, x=9] [L6] RET, EXPR id(x-1) VAL [\old(x)=10, id(x-1)=9, x=10] [L6] return id(x-1) + 1; VAL [\old(x)=10, \result=10, id(x-1)=9, x=10] [L6] RET, EXPR id(x-1) VAL [\old(x)=11, id(x-1)=10, x=11] [L6] return id(x-1) + 1; VAL [\old(x)=11, \result=11, id(x-1)=10, x=11] [L6] RET, EXPR id(x-1) VAL [\old(x)=12, id(x-1)=11, x=12] [L6] return id(x-1) + 1; VAL [\old(x)=12, \result=12, id(x-1)=11, x=12] [L6] RET, EXPR id(x-1) VAL [\old(x)=13, id(x-1)=12, x=13] [L6] return id(x-1) + 1; VAL [\old(x)=13, \result=13, id(x-1)=12, x=13] [L6] RET, EXPR id(x-1) VAL [\old(x)=14, id(x-1)=13, x=14] [L6] return id(x-1) + 1; VAL [\old(x)=14, \result=14, id(x-1)=13, x=14] [L6] RET, EXPR id(x-1) VAL [\old(x)=15, id(x-1)=14, x=15] [L6] return id(x-1) + 1; VAL [\old(x)=15, \result=15, id(x-1)=14, x=15] [L6] RET, EXPR id(x-1) VAL [\old(x)=16, id(x-1)=15, x=16] [L6] return id(x-1) + 1; VAL [\old(x)=16, \result=16, id(x-1)=15, x=16] [L6] RET, EXPR id(x-1) VAL [\old(x)=17, id(x-1)=16, x=17] [L6] return id(x-1) + 1; VAL [\old(x)=17, \result=17, id(x-1)=16, x=17] [L6] RET, EXPR id(x-1) VAL [\old(x)=18, id(x-1)=17, x=18] [L6] return id(x-1) + 1; VAL [\old(x)=18, \result=18, id(x-1)=17, x=18] [L6] RET, EXPR id(x-1) VAL [\old(x)=19, id(x-1)=18, x=19] [L6] return id(x-1) + 1; VAL [\old(x)=19, \result=19, id(x-1)=18, x=19] [L6] RET, EXPR id(x-1) VAL [\old(x)=20, id(x-1)=19, x=20] [L6] return id(x-1) + 1; VAL [\old(x)=20, \result=20, id(x-1)=19, x=20] [L6] RET, EXPR id(x-1) VAL [\old(x)=21, id(x-1)=20, x=21] [L6] return id(x-1) + 1; VAL [\old(x)=21, \result=21, id(x-1)=20, x=21] [L6] RET, EXPR id(x-1) VAL [\old(x)=22, id(x-1)=21, x=22] [L6] return id(x-1) + 1; VAL [\old(x)=22, \result=22, id(x-1)=21, x=22] [L6] RET, EXPR id(x-1) VAL [\old(x)=23, id(x-1)=22, x=23] [L6] return id(x-1) + 1; VAL [\old(x)=23, \result=23, id(x-1)=22, x=23] [L6] RET, EXPR id(x-1) VAL [\old(x)=24, id(x-1)=23, x=24] [L6] return id(x-1) + 1; VAL [\old(x)=24, \result=24, id(x-1)=23, x=24] [L6] RET, EXPR id(x-1) VAL [\old(x)=25, id(x-1)=24, x=25] [L6] return id(x-1) + 1; VAL [\old(x)=25, \result=25, id(x-1)=24, x=25] [L11] RET, EXPR id(input) VAL [id(input)=25, input=25] [L11] int result = id(input); VAL [id(input)=25, input=25, result=25] [L12] COND TRUE result == 25 VAL [input=25, result=25] [L13] __VERIFIER_error() VAL [input=25, result=25] - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 21.0s, OverallIterations: 26, TraceHistogramMax: 26, AutomataDifference: 5.4s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 454 SDtfs, 1580 SDslu, 2545 SDs, 0 SdLazy, 955 SolverSat, 77 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1425 GetRequests, 725 SyntacticMatches, 0 SemanticMatches, 700 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4900 ImplicationChecksByTransitivity, 8.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=143occurred in iteration=25, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 25 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 14.0s InterpolantComputationTime, 3016 NumberOfCodeBlocks, 3016 NumberOfCodeBlocksAsserted, 26 NumberOfCheckSat, 2775 ConstructedInterpolants, 0 QuantifiedInterpolants, 1030775 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 1 PerfectInterpolantSequences, 7500/19600 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...