/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.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_11.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 16:17:05,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 16:17:05,102 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 16:17:05,126 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 16:17:05,126 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 16:17:05,128 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 16:17:05,129 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 16:17:05,131 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 16:17:05,133 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 16:17:05,133 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 16:17:05,134 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 16:17:05,136 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 16:17:05,136 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 16:17:05,137 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 16:17:05,138 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 16:17:05,139 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 16:17:05,140 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 16:17:05,141 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 16:17:05,143 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 16:17:05,144 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 16:17:05,146 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 16:17:05,147 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 16:17:05,148 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 16:17:05,149 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 16:17:05,151 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-18 16:17:05,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 16:17:05,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 16:17:05,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 16:17:05,176 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 16:17:05,221 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 16:17:05,221 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 16:17:05,224 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 16:17:05,224 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 16:17:05,224 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 16:17:05,224 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 16:17:05,225 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 16:17:05,226 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 16:17:05,226 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 16:17:05,226 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 16:17:05,226 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 16:17:05,226 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 16:17:05,227 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 16:17:05,227 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 16:17:05,227 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 16:17:05,227 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 16:17:05,227 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 16:17:05,229 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 16:17:05,229 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 16:17:05,229 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 16:17:05,230 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 16:17:05,230 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 16:17:05,230 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 16:17:05,230 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 16:17:05,231 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 16:17:05,231 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 16:17:05,231 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 16:17:05,231 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 16:17:05,231 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 16:17:05,232 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES 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: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true [2020-08-18 16:17:05,560 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 16:17:05,580 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 16:17:05,584 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 16:17:05,586 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 16:17:05,586 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 16:17:05,587 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 16:17:05,664 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efbb18131/41cbd76ec4d24f7ea93e0dacf4fa898a/FLAGfe9a725a8 [2020-08-18 16:17:06,145 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 16:17:06,149 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_11.c [2020-08-18 16:17:06,162 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efbb18131/41cbd76ec4d24f7ea93e0dacf4fa898a/FLAGfe9a725a8 [2020-08-18 16:17:06,514 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/efbb18131/41cbd76ec4d24f7ea93e0dacf4fa898a [2020-08-18 16:17:06,524 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 16:17:06,527 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 16:17:06,528 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:06,528 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 16:17:06,532 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 16:17:06,533 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,536 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4ed69f49 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06, skipping insertion in model container [2020-08-18 16:17:06,536 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,544 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 16:17:06,569 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 16:17:06,758 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:06,763 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 16:17:06,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 16:17:06,802 INFO L208 MainTranslator]: Completed translation [2020-08-18 16:17:06,802 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06 WrapperNode [2020-08-18 16:17:06,802 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 16:17:06,803 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 16:17:06,803 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 16:17:06,803 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 16:17:06,901 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,903 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,910 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,910 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,937 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,939 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... [2020-08-18 16:17:06,941 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 16:17:06,942 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 16:17:06,942 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 16:17:06,942 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 16:17:06,943 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-08-18 16:17:07,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 16:17:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 16:17:07,001 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 16:17:07,001 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 16:17:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 16:17:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 16:17:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 16:17:07,002 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 16:17:07,339 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 16:17:07,340 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-18 16:17:07,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:07 BoogieIcfgContainer [2020-08-18 16:17:07,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 16:17:07,346 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 16:17:07,346 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 16:17:07,350 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 16:17:07,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 04:17:06" (1/3) ... [2020-08-18 16:17:07,351 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bba45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:07, skipping insertion in model container [2020-08-18 16:17:07,351 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 04:17:06" (2/3) ... [2020-08-18 16:17:07,352 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79bba45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 04:17:07, skipping insertion in model container [2020-08-18 16:17:07,352 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 04:17:07" (3/3) ... [2020-08-18 16:17:07,354 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_11.c [2020-08-18 16:17:07,371 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 16:17:07,392 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 16:17:07,420 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 16:17:07,455 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 16:17:07,455 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 16:17:07,455 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 16:17:07,455 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 16:17:07,455 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 16:17:07,456 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 16:17:07,456 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 16:17:07,456 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 16:17:07,476 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-08-18 16:17:07,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:07,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:07,483 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:07,484 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:07,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:07,489 INFO L82 PathProgramCache]: Analyzing trace with hash -316470182, now seen corresponding path program 1 times [2020-08-18 16:17:07,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:07,496 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873251916] [2020-08-18 16:17:07,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:07,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:07,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:07,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873251916] [2020-08-18 16:17:07,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:07,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:07,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946427708] [2020-08-18 16:17:07,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:07,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:07,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:07,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:07,735 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-08-18 16:17:07,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:07,806 INFO L93 Difference]: Finished difference Result 93 states and 162 transitions. [2020-08-18 16:17:07,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:07,808 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:07,822 INFO L225 Difference]: With dead ends: 93 [2020-08-18 16:17:07,822 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 16:17:07,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:07,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 16:17:07,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2020-08-18 16:17:07,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-08-18 16:17:07,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 97 transitions. [2020-08-18 16:17:07,879 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 97 transitions. Word has length 21 [2020-08-18 16:17:07,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:07,880 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 97 transitions. [2020-08-18 16:17:07,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:07,880 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 97 transitions. [2020-08-18 16:17:07,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-18 16:17:07,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:07,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:07,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 16:17:07,882 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:07,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:07,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1327587432, now seen corresponding path program 1 times [2020-08-18 16:17:07,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:07,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086169132] [2020-08-18 16:17:07,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:07,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:07,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:07,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:07,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086169132] [2020-08-18 16:17:07,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:07,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:07,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457535283] [2020-08-18 16:17:07,972 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:07,972 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:07,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:07,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:07,974 INFO L87 Difference]: Start difference. First operand 54 states and 97 transitions. Second operand 3 states. [2020-08-18 16:17:08,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,041 INFO L93 Difference]: Finished difference Result 127 states and 232 transitions. [2020-08-18 16:17:08,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,042 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-18 16:17:08,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,044 INFO L225 Difference]: With dead ends: 127 [2020-08-18 16:17:08,045 INFO L226 Difference]: Without dead ends: 78 [2020-08-18 16:17:08,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-18 16:17:08,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-08-18 16:17:08,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-08-18 16:17:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 137 transitions. [2020-08-18 16:17:08,070 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 137 transitions. Word has length 21 [2020-08-18 16:17:08,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,071 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 137 transitions. [2020-08-18 16:17:08,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 137 transitions. [2020-08-18 16:17:08,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:08,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 16:17:08,073 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1220427994, now seen corresponding path program 1 times [2020-08-18 16:17:08,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28455932] [2020-08-18 16:17:08,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28455932] [2020-08-18 16:17:08,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184050805] [2020-08-18 16:17:08,154 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,155 INFO L87 Difference]: Start difference. First operand 76 states and 137 transitions. Second operand 3 states. [2020-08-18 16:17:08,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,178 INFO L93 Difference]: Finished difference Result 117 states and 207 transitions. [2020-08-18 16:17:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,179 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,181 INFO L225 Difference]: With dead ends: 117 [2020-08-18 16:17:08,181 INFO L226 Difference]: Without dead ends: 81 [2020-08-18 16:17:08,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-08-18 16:17:08,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 79. [2020-08-18 16:17:08,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 16:17:08,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 139 transitions. [2020-08-18 16:17:08,192 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 139 transitions. Word has length 22 [2020-08-18 16:17:08,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,192 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 139 transitions. [2020-08-18 16:17:08,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,192 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 139 transitions. [2020-08-18 16:17:08,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:08,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 16:17:08,194 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1794675624, now seen corresponding path program 1 times [2020-08-18 16:17:08,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297624455] [2020-08-18 16:17:08,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,244 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297624455] [2020-08-18 16:17:08,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074581204] [2020-08-18 16:17:08,246 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,247 INFO L87 Difference]: Start difference. First operand 79 states and 139 transitions. Second operand 3 states. [2020-08-18 16:17:08,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,268 INFO L93 Difference]: Finished difference Result 148 states and 264 transitions. [2020-08-18 16:17:08,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:08,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,271 INFO L225 Difference]: With dead ends: 148 [2020-08-18 16:17:08,271 INFO L226 Difference]: Without dead ends: 146 [2020-08-18 16:17:08,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-08-18 16:17:08,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 104. [2020-08-18 16:17:08,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-08-18 16:17:08,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 184 transitions. [2020-08-18 16:17:08,283 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 184 transitions. Word has length 22 [2020-08-18 16:17:08,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,287 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 184 transitions. [2020-08-18 16:17:08,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,288 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 184 transitions. [2020-08-18 16:17:08,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 16:17:08,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 16:17:08,290 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,290 INFO L82 PathProgramCache]: Analyzing trace with hash 783558374, now seen corresponding path program 1 times [2020-08-18 16:17:08,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071247875] [2020-08-18 16:17:08,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071247875] [2020-08-18 16:17:08,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,335 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,335 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201224293] [2020-08-18 16:17:08,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,337 INFO L87 Difference]: Start difference. First operand 104 states and 184 transitions. Second operand 3 states. [2020-08-18 16:17:08,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,358 INFO L93 Difference]: Finished difference Result 244 states and 438 transitions. [2020-08-18 16:17:08,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,359 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-18 16:17:08,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,361 INFO L225 Difference]: With dead ends: 244 [2020-08-18 16:17:08,361 INFO L226 Difference]: Without dead ends: 148 [2020-08-18 16:17:08,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-08-18 16:17:08,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 146. [2020-08-18 16:17:08,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-08-18 16:17:08,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 258 transitions. [2020-08-18 16:17:08,375 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 258 transitions. Word has length 22 [2020-08-18 16:17:08,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,376 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 258 transitions. [2020-08-18 16:17:08,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,376 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 258 transitions. [2020-08-18 16:17:08,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:08,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,378 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 16:17:08,379 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,379 INFO L82 PathProgramCache]: Analyzing trace with hash -199417107, now seen corresponding path program 1 times [2020-08-18 16:17:08,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1232565241] [2020-08-18 16:17:08,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1232565241] [2020-08-18 16:17:08,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,422 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312629712] [2020-08-18 16:17:08,423 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,423 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,424 INFO L87 Difference]: Start difference. First operand 146 states and 258 transitions. Second operand 3 states. [2020-08-18 16:17:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,443 INFO L93 Difference]: Finished difference Result 219 states and 385 transitions. [2020-08-18 16:17:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,444 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:08,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,445 INFO L225 Difference]: With dead ends: 219 [2020-08-18 16:17:08,446 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 16:17:08,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 16:17:08,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2020-08-18 16:17:08,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-08-18 16:17:08,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 258 transitions. [2020-08-18 16:17:08,459 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 258 transitions. Word has length 23 [2020-08-18 16:17:08,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,459 INFO L479 AbstractCegarLoop]: Abstraction has 148 states and 258 transitions. [2020-08-18 16:17:08,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,460 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 258 transitions. [2020-08-18 16:17:08,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:08,461 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 16:17:08,462 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1479280785, now seen corresponding path program 1 times [2020-08-18 16:17:08,463 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,463 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706145795] [2020-08-18 16:17:08,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,532 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706145795] [2020-08-18 16:17:08,533 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,533 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,533 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782456177] [2020-08-18 16:17:08,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,536 INFO L87 Difference]: Start difference. First operand 148 states and 258 transitions. Second operand 3 states. [2020-08-18 16:17:08,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,556 INFO L93 Difference]: Finished difference Result 276 states and 488 transitions. [2020-08-18 16:17:08,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,556 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:08,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,558 INFO L225 Difference]: With dead ends: 276 [2020-08-18 16:17:08,559 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 16:17:08,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 16:17:08,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 200. [2020-08-18 16:17:08,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-08-18 16:17:08,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 346 transitions. [2020-08-18 16:17:08,573 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 346 transitions. Word has length 23 [2020-08-18 16:17:08,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,574 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 346 transitions. [2020-08-18 16:17:08,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,574 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 346 transitions. [2020-08-18 16:17:08,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-18 16:17:08,575 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,576 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 16:17:08,576 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,577 INFO L82 PathProgramCache]: Analyzing trace with hash 1804569261, now seen corresponding path program 1 times [2020-08-18 16:17:08,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660701906] [2020-08-18 16:17:08,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660701906] [2020-08-18 16:17:08,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,610 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376481710] [2020-08-18 16:17:08,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,612 INFO L87 Difference]: Start difference. First operand 200 states and 346 transitions. Second operand 3 states. [2020-08-18 16:17:08,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,635 INFO L93 Difference]: Finished difference Result 472 states and 824 transitions. [2020-08-18 16:17:08,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-18 16:17:08,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,637 INFO L225 Difference]: With dead ends: 472 [2020-08-18 16:17:08,638 INFO L226 Difference]: Without dead ends: 282 [2020-08-18 16:17:08,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-08-18 16:17:08,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 280. [2020-08-18 16:17:08,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 280 states. [2020-08-18 16:17:08,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 482 transitions. [2020-08-18 16:17:08,655 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 482 transitions. Word has length 23 [2020-08-18 16:17:08,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,655 INFO L479 AbstractCegarLoop]: Abstraction has 280 states and 482 transitions. [2020-08-18 16:17:08,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,656 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 482 transitions. [2020-08-18 16:17:08,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:08,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,658 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 16:17:08,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1387149659, now seen corresponding path program 1 times [2020-08-18 16:17:08,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009094976] [2020-08-18 16:17:08,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009094976] [2020-08-18 16:17:08,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413981557] [2020-08-18 16:17:08,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,704 INFO L87 Difference]: Start difference. First operand 280 states and 482 transitions. Second operand 3 states. [2020-08-18 16:17:08,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,729 INFO L93 Difference]: Finished difference Result 420 states and 720 transitions. [2020-08-18 16:17:08,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,730 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:08,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,732 INFO L225 Difference]: With dead ends: 420 [2020-08-18 16:17:08,732 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 16:17:08,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 16:17:08,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 284. [2020-08-18 16:17:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-08-18 16:17:08,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 482 transitions. [2020-08-18 16:17:08,746 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 482 transitions. Word has length 24 [2020-08-18 16:17:08,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,746 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 482 transitions. [2020-08-18 16:17:08,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,747 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 482 transitions. [2020-08-18 16:17:08,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:08,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,749 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 16:17:08,749 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,750 INFO L82 PathProgramCache]: Analyzing trace with hash 107285981, now seen corresponding path program 1 times [2020-08-18 16:17:08,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622717412] [2020-08-18 16:17:08,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622717412] [2020-08-18 16:17:08,782 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,782 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820075020] [2020-08-18 16:17:08,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,784 INFO L87 Difference]: Start difference. First operand 284 states and 482 transitions. Second operand 3 states. [2020-08-18 16:17:08,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,806 INFO L93 Difference]: Finished difference Result 524 states and 904 transitions. [2020-08-18 16:17:08,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,807 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:08,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,810 INFO L225 Difference]: With dead ends: 524 [2020-08-18 16:17:08,811 INFO L226 Difference]: Without dead ends: 522 [2020-08-18 16:17:08,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 522 states. [2020-08-18 16:17:08,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 522 to 392. [2020-08-18 16:17:08,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 392 states. [2020-08-18 16:17:08,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 654 transitions. [2020-08-18 16:17:08,826 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 654 transitions. Word has length 24 [2020-08-18 16:17:08,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,827 INFO L479 AbstractCegarLoop]: Abstraction has 392 states and 654 transitions. [2020-08-18 16:17:08,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,827 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 654 transitions. [2020-08-18 16:17:08,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-18 16:17:08,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,829 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,829 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 16:17:08,829 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,830 INFO L82 PathProgramCache]: Analyzing trace with hash -903831269, now seen corresponding path program 1 times [2020-08-18 16:17:08,830 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449062994] [2020-08-18 16:17:08,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449062994] [2020-08-18 16:17:08,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188530131] [2020-08-18 16:17:08,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,857 INFO L87 Difference]: Start difference. First operand 392 states and 654 transitions. Second operand 3 states. [2020-08-18 16:17:08,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,881 INFO L93 Difference]: Finished difference Result 924 states and 1552 transitions. [2020-08-18 16:17:08,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,882 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-18 16:17:08,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,885 INFO L225 Difference]: With dead ends: 924 [2020-08-18 16:17:08,885 INFO L226 Difference]: Without dead ends: 546 [2020-08-18 16:17:08,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 546 states. [2020-08-18 16:17:08,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 546 to 544. [2020-08-18 16:17:08,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 544 states. [2020-08-18 16:17:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 902 transitions. [2020-08-18 16:17:08,905 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 902 transitions. Word has length 24 [2020-08-18 16:17:08,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,906 INFO L479 AbstractCegarLoop]: Abstraction has 544 states and 902 transitions. [2020-08-18 16:17:08,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 902 transitions. [2020-08-18 16:17:08,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:08,908 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,908 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,908 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 16:17:08,908 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,909 INFO L82 PathProgramCache]: Analyzing trace with hash -968887806, now seen corresponding path program 1 times [2020-08-18 16:17:08,909 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,909 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004503398] [2020-08-18 16:17:08,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:08,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:08,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:08,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004503398] [2020-08-18 16:17:08,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:08,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:08,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24954950] [2020-08-18 16:17:08,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:08,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:08,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:08,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,940 INFO L87 Difference]: Start difference. First operand 544 states and 902 transitions. Second operand 3 states. [2020-08-18 16:17:08,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:08,962 INFO L93 Difference]: Finished difference Result 816 states and 1348 transitions. [2020-08-18 16:17:08,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:08,963 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:08,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:08,966 INFO L225 Difference]: With dead ends: 816 [2020-08-18 16:17:08,966 INFO L226 Difference]: Without dead ends: 554 [2020-08-18 16:17:08,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:08,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 554 states. [2020-08-18 16:17:08,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 554 to 552. [2020-08-18 16:17:08,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 552 states. [2020-08-18 16:17:08,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 902 transitions. [2020-08-18 16:17:08,984 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 902 transitions. Word has length 25 [2020-08-18 16:17:08,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:08,985 INFO L479 AbstractCegarLoop]: Abstraction has 552 states and 902 transitions. [2020-08-18 16:17:08,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:08,985 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 902 transitions. [2020-08-18 16:17:08,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:08,986 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:08,986 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:08,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 16:17:08,987 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:08,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:08,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2046215812, now seen corresponding path program 1 times [2020-08-18 16:17:08,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:08,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731028967] [2020-08-18 16:17:08,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:08,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731028967] [2020-08-18 16:17:09,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712490146] [2020-08-18 16:17:09,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,014 INFO L87 Difference]: Start difference. First operand 552 states and 902 transitions. Second operand 3 states. [2020-08-18 16:17:09,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,039 INFO L93 Difference]: Finished difference Result 1004 states and 1672 transitions. [2020-08-18 16:17:09,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,040 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:09,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,045 INFO L225 Difference]: With dead ends: 1004 [2020-08-18 16:17:09,046 INFO L226 Difference]: Without dead ends: 1002 [2020-08-18 16:17:09,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1002 states. [2020-08-18 16:17:09,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1002 to 776. [2020-08-18 16:17:09,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-18 16:17:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1238 transitions. [2020-08-18 16:17:09,071 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1238 transitions. Word has length 25 [2020-08-18 16:17:09,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,071 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1238 transitions. [2020-08-18 16:17:09,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,072 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1238 transitions. [2020-08-18 16:17:09,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-18 16:17:09,073 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,074 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 16:17:09,074 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1035098562, now seen corresponding path program 1 times [2020-08-18 16:17:09,075 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,075 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674481842] [2020-08-18 16:17:09,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674481842] [2020-08-18 16:17:09,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,099 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435461783] [2020-08-18 16:17:09,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,101 INFO L87 Difference]: Start difference. First operand 776 states and 1238 transitions. Second operand 3 states. [2020-08-18 16:17:09,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,135 INFO L93 Difference]: Finished difference Result 1820 states and 2920 transitions. [2020-08-18 16:17:09,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,135 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-18 16:17:09,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,141 INFO L225 Difference]: With dead ends: 1820 [2020-08-18 16:17:09,141 INFO L226 Difference]: Without dead ends: 1066 [2020-08-18 16:17:09,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-08-18 16:17:09,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 1064. [2020-08-18 16:17:09,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1064 states. [2020-08-18 16:17:09,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1686 transitions. [2020-08-18 16:17:09,178 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1686 transitions. Word has length 25 [2020-08-18 16:17:09,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,178 INFO L479 AbstractCegarLoop]: Abstraction has 1064 states and 1686 transitions. [2020-08-18 16:17:09,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,178 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1686 transitions. [2020-08-18 16:17:09,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:09,180 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,181 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,181 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 16:17:09,181 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,181 INFO L82 PathProgramCache]: Analyzing trace with hash -991604848, now seen corresponding path program 1 times [2020-08-18 16:17:09,182 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,182 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762174816] [2020-08-18 16:17:09,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762174816] [2020-08-18 16:17:09,210 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,210 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906790990] [2020-08-18 16:17:09,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,212 INFO L87 Difference]: Start difference. First operand 1064 states and 1686 transitions. Second operand 3 states. [2020-08-18 16:17:09,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,252 INFO L93 Difference]: Finished difference Result 1596 states and 2520 transitions. [2020-08-18 16:17:09,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,253 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:09,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,258 INFO L225 Difference]: With dead ends: 1596 [2020-08-18 16:17:09,258 INFO L226 Difference]: Without dead ends: 1082 [2020-08-18 16:17:09,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1082 states. [2020-08-18 16:17:09,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1082 to 1080. [2020-08-18 16:17:09,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1080 states. [2020-08-18 16:17:09,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1686 transitions. [2020-08-18 16:17:09,289 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1686 transitions. Word has length 26 [2020-08-18 16:17:09,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,289 INFO L479 AbstractCegarLoop]: Abstraction has 1080 states and 1686 transitions. [2020-08-18 16:17:09,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1686 transitions. [2020-08-18 16:17:09,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:09,291 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,291 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,291 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 16:17:09,292 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,292 INFO L82 PathProgramCache]: Analyzing trace with hash 2023498770, now seen corresponding path program 1 times [2020-08-18 16:17:09,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089397809] [2020-08-18 16:17:09,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089397809] [2020-08-18 16:17:09,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557597967] [2020-08-18 16:17:09,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,317 INFO L87 Difference]: Start difference. First operand 1080 states and 1686 transitions. Second operand 3 states. [2020-08-18 16:17:09,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,352 INFO L93 Difference]: Finished difference Result 1932 states and 3080 transitions. [2020-08-18 16:17:09,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,353 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:09,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,362 INFO L225 Difference]: With dead ends: 1932 [2020-08-18 16:17:09,362 INFO L226 Difference]: Without dead ends: 1930 [2020-08-18 16:17:09,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-18 16:17:09,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1544. [2020-08-18 16:17:09,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-18 16:17:09,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 2342 transitions. [2020-08-18 16:17:09,413 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 2342 transitions. Word has length 26 [2020-08-18 16:17:09,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,413 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 2342 transitions. [2020-08-18 16:17:09,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 2342 transitions. [2020-08-18 16:17:09,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-18 16:17:09,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 16:17:09,418 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,418 INFO L82 PathProgramCache]: Analyzing trace with hash 1012381520, now seen corresponding path program 1 times [2020-08-18 16:17:09,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449147662] [2020-08-18 16:17:09,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449147662] [2020-08-18 16:17:09,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,440 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664894533] [2020-08-18 16:17:09,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,442 INFO L87 Difference]: Start difference. First operand 1544 states and 2342 transitions. Second operand 3 states. [2020-08-18 16:17:09,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,503 INFO L93 Difference]: Finished difference Result 3596 states and 5480 transitions. [2020-08-18 16:17:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,504 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-18 16:17:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,516 INFO L225 Difference]: With dead ends: 3596 [2020-08-18 16:17:09,517 INFO L226 Difference]: Without dead ends: 2090 [2020-08-18 16:17:09,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2090 states. [2020-08-18 16:17:09,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2090 to 2088. [2020-08-18 16:17:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2088 states. [2020-08-18 16:17:09,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2088 states to 2088 states and 3142 transitions. [2020-08-18 16:17:09,586 INFO L78 Accepts]: Start accepts. Automaton has 2088 states and 3142 transitions. Word has length 26 [2020-08-18 16:17:09,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,586 INFO L479 AbstractCegarLoop]: Abstraction has 2088 states and 3142 transitions. [2020-08-18 16:17:09,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,586 INFO L276 IsEmpty]: Start isEmpty. Operand 2088 states and 3142 transitions. [2020-08-18 16:17:09,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:09,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,589 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 16:17:09,590 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1695832809, now seen corresponding path program 1 times [2020-08-18 16:17:09,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671836190] [2020-08-18 16:17:09,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,614 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671836190] [2020-08-18 16:17:09,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223202196] [2020-08-18 16:17:09,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,616 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,618 INFO L87 Difference]: Start difference. First operand 2088 states and 3142 transitions. Second operand 3 states. [2020-08-18 16:17:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,670 INFO L93 Difference]: Finished difference Result 3132 states and 4696 transitions. [2020-08-18 16:17:09,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,672 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 16:17:09,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,681 INFO L225 Difference]: With dead ends: 3132 [2020-08-18 16:17:09,681 INFO L226 Difference]: Without dead ends: 2122 [2020-08-18 16:17:09,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2020-08-18 16:17:09,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 2120. [2020-08-18 16:17:09,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2120 states. [2020-08-18 16:17:09,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2120 states to 2120 states and 3142 transitions. [2020-08-18 16:17:09,746 INFO L78 Accepts]: Start accepts. Automaton has 2120 states and 3142 transitions. Word has length 27 [2020-08-18 16:17:09,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,747 INFO L479 AbstractCegarLoop]: Abstraction has 2120 states and 3142 transitions. [2020-08-18 16:17:09,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,747 INFO L276 IsEmpty]: Start isEmpty. Operand 2120 states and 3142 transitions. [2020-08-18 16:17:09,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:09,750 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,750 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 16:17:09,750 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1319270809, now seen corresponding path program 1 times [2020-08-18 16:17:09,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746462353] [2020-08-18 16:17:09,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:09,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:09,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746462353] [2020-08-18 16:17:09,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:09,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:09,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956806659] [2020-08-18 16:17:09,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:09,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:09,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:09,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,781 INFO L87 Difference]: Start difference. First operand 2120 states and 3142 transitions. Second operand 3 states. [2020-08-18 16:17:09,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:09,847 INFO L93 Difference]: Finished difference Result 3724 states and 5640 transitions. [2020-08-18 16:17:09,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:09,848 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 16:17:09,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:09,885 INFO L225 Difference]: With dead ends: 3724 [2020-08-18 16:17:09,885 INFO L226 Difference]: Without dead ends: 3722 [2020-08-18 16:17:09,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:09,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-18 16:17:09,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3080. [2020-08-18 16:17:09,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3080 states. [2020-08-18 16:17:09,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3080 states to 3080 states and 4422 transitions. [2020-08-18 16:17:09,969 INFO L78 Accepts]: Start accepts. Automaton has 3080 states and 4422 transitions. Word has length 27 [2020-08-18 16:17:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:09,970 INFO L479 AbstractCegarLoop]: Abstraction has 3080 states and 4422 transitions. [2020-08-18 16:17:09,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3080 states and 4422 transitions. [2020-08-18 16:17:09,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-18 16:17:09,977 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:09,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:09,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 16:17:09,978 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:09,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:09,978 INFO L82 PathProgramCache]: Analyzing trace with hash 308153559, now seen corresponding path program 1 times [2020-08-18 16:17:09,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:09,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [838265742] [2020-08-18 16:17:09,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:09,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:10,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [838265742] [2020-08-18 16:17:10,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578032808] [2020-08-18 16:17:10,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,017 INFO L87 Difference]: Start difference. First operand 3080 states and 4422 transitions. Second operand 3 states. [2020-08-18 16:17:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,100 INFO L93 Difference]: Finished difference Result 7116 states and 10248 transitions. [2020-08-18 16:17:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,101 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-18 16:17:10,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,119 INFO L225 Difference]: With dead ends: 7116 [2020-08-18 16:17:10,119 INFO L226 Difference]: Without dead ends: 4106 [2020-08-18 16:17:10,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4106 states. [2020-08-18 16:17:10,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4106 to 4104. [2020-08-18 16:17:10,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4104 states. [2020-08-18 16:17:10,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4104 states to 4104 states and 5830 transitions. [2020-08-18 16:17:10,238 INFO L78 Accepts]: Start accepts. Automaton has 4104 states and 5830 transitions. Word has length 27 [2020-08-18 16:17:10,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,239 INFO L479 AbstractCegarLoop]: Abstraction has 4104 states and 5830 transitions. [2020-08-18 16:17:10,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,239 INFO L276 IsEmpty]: Start isEmpty. Operand 4104 states and 5830 transitions. [2020-08-18 16:17:10,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:17:10,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,244 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,245 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 16:17:10,246 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,247 INFO L82 PathProgramCache]: Analyzing trace with hash -2052062779, now seen corresponding path program 1 times [2020-08-18 16:17:10,247 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611226234] [2020-08-18 16:17:10,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:10,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611226234] [2020-08-18 16:17:10,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074039986] [2020-08-18 16:17:10,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,274 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,274 INFO L87 Difference]: Start difference. First operand 4104 states and 5830 transitions. Second operand 3 states. [2020-08-18 16:17:10,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,341 INFO L93 Difference]: Finished difference Result 6156 states and 8712 transitions. [2020-08-18 16:17:10,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,342 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 16:17:10,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,385 INFO L225 Difference]: With dead ends: 6156 [2020-08-18 16:17:10,386 INFO L226 Difference]: Without dead ends: 4170 [2020-08-18 16:17:10,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2020-08-18 16:17:10,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 4168. [2020-08-18 16:17:10,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4168 states. [2020-08-18 16:17:10,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4168 states to 4168 states and 5830 transitions. [2020-08-18 16:17:10,551 INFO L78 Accepts]: Start accepts. Automaton has 4168 states and 5830 transitions. Word has length 28 [2020-08-18 16:17:10,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:10,551 INFO L479 AbstractCegarLoop]: Abstraction has 4168 states and 5830 transitions. [2020-08-18 16:17:10,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:10,552 INFO L276 IsEmpty]: Start isEmpty. Operand 4168 states and 5830 transitions. [2020-08-18 16:17:10,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:17:10,556 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:10,556 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:10,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 16:17:10,557 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:10,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:10,557 INFO L82 PathProgramCache]: Analyzing trace with hash 963040839, now seen corresponding path program 1 times [2020-08-18 16:17:10,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:10,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120627045] [2020-08-18 16:17:10,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:10,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:10,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:10,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120627045] [2020-08-18 16:17:10,585 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:10,585 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:10,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676405936] [2020-08-18 16:17:10,586 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:10,586 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:10,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:10,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,587 INFO L87 Difference]: Start difference. First operand 4168 states and 5830 transitions. Second operand 3 states. [2020-08-18 16:17:10,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:10,702 INFO L93 Difference]: Finished difference Result 12108 states and 16712 transitions. [2020-08-18 16:17:10,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:10,703 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 16:17:10,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:10,721 INFO L225 Difference]: With dead ends: 12108 [2020-08-18 16:17:10,721 INFO L226 Difference]: Without dead ends: 8074 [2020-08-18 16:17:10,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:10,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-18 16:17:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 8072. [2020-08-18 16:17:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 16:17:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10886 transitions. [2020-08-18 16:17:11,027 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10886 transitions. Word has length 28 [2020-08-18 16:17:11,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,028 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10886 transitions. [2020-08-18 16:17:11,028 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,028 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10886 transitions. [2020-08-18 16:17:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-18 16:17:11,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,043 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:11,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 16:17:11,044 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1974158089, now seen corresponding path program 1 times [2020-08-18 16:17:11,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601578164] [2020-08-18 16:17:11,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:11,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601578164] [2020-08-18 16:17:11,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697767985] [2020-08-18 16:17:11,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,072 INFO L87 Difference]: Start difference. First operand 8072 states and 10886 transitions. Second operand 3 states. [2020-08-18 16:17:11,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,335 INFO L93 Difference]: Finished difference Result 9100 states and 12680 transitions. [2020-08-18 16:17:11,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-18 16:17:11,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,356 INFO L225 Difference]: With dead ends: 9100 [2020-08-18 16:17:11,356 INFO L226 Difference]: Without dead ends: 9098 [2020-08-18 16:17:11,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9098 states. [2020-08-18 16:17:11,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9098 to 8072. [2020-08-18 16:17:11,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8072 states. [2020-08-18 16:17:11,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8072 states to 8072 states and 10758 transitions. [2020-08-18 16:17:11,557 INFO L78 Accepts]: Start accepts. Automaton has 8072 states and 10758 transitions. Word has length 28 [2020-08-18 16:17:11,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:11,557 INFO L479 AbstractCegarLoop]: Abstraction has 8072 states and 10758 transitions. [2020-08-18 16:17:11,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:11,558 INFO L276 IsEmpty]: Start isEmpty. Operand 8072 states and 10758 transitions. [2020-08-18 16:17:11,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 16:17:11,572 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:11,572 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:11,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 16:17:11,573 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:11,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:11,573 INFO L82 PathProgramCache]: Analyzing trace with hash -210289620, now seen corresponding path program 1 times [2020-08-18 16:17:11,573 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:11,573 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727070723] [2020-08-18 16:17:11,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:11,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:11,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:11,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727070723] [2020-08-18 16:17:11,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:11,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:11,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396233205] [2020-08-18 16:17:11,612 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:11,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:11,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:11,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,613 INFO L87 Difference]: Start difference. First operand 8072 states and 10758 transitions. Second operand 3 states. [2020-08-18 16:17:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:11,761 INFO L93 Difference]: Finished difference Result 13708 states and 18568 transitions. [2020-08-18 16:17:11,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:11,762 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 16:17:11,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:11,791 INFO L225 Difference]: With dead ends: 13708 [2020-08-18 16:17:11,791 INFO L226 Difference]: Without dead ends: 13706 [2020-08-18 16:17:11,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:11,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13706 states. [2020-08-18 16:17:12,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13706 to 12168. [2020-08-18 16:17:12,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12168 states. [2020-08-18 16:17:12,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12168 states to 12168 states and 15750 transitions. [2020-08-18 16:17:12,104 INFO L78 Accepts]: Start accepts. Automaton has 12168 states and 15750 transitions. Word has length 29 [2020-08-18 16:17:12,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:12,104 INFO L479 AbstractCegarLoop]: Abstraction has 12168 states and 15750 transitions. [2020-08-18 16:17:12,104 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:12,104 INFO L276 IsEmpty]: Start isEmpty. Operand 12168 states and 15750 transitions. [2020-08-18 16:17:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-18 16:17:12,122 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:12,123 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:12,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 16:17:12,123 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:12,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1221406870, now seen corresponding path program 1 times [2020-08-18 16:17:12,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:12,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544051204] [2020-08-18 16:17:12,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:12,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:12,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544051204] [2020-08-18 16:17:12,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:12,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:12,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623719390] [2020-08-18 16:17:12,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:12,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:12,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:12,144 INFO L87 Difference]: Start difference. First operand 12168 states and 15750 transitions. Second operand 3 states. [2020-08-18 16:17:12,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:12,335 INFO L93 Difference]: Finished difference Result 27788 states and 35976 transitions. [2020-08-18 16:17:12,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:12,336 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-18 16:17:12,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:12,366 INFO L225 Difference]: With dead ends: 27788 [2020-08-18 16:17:12,367 INFO L226 Difference]: Without dead ends: 15754 [2020-08-18 16:17:12,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:12,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15754 states. [2020-08-18 16:17:12,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15754 to 15752. [2020-08-18 16:17:12,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15752 states. [2020-08-18 16:17:12,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15752 states to 15752 states and 19974 transitions. [2020-08-18 16:17:12,831 INFO L78 Accepts]: Start accepts. Automaton has 15752 states and 19974 transitions. Word has length 29 [2020-08-18 16:17:12,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:12,831 INFO L479 AbstractCegarLoop]: Abstraction has 15752 states and 19974 transitions. [2020-08-18 16:17:12,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:12,831 INFO L276 IsEmpty]: Start isEmpty. Operand 15752 states and 19974 transitions. [2020-08-18 16:17:12,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:17:12,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:12,850 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:12,850 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 16:17:12,850 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:12,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:12,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2071172156, now seen corresponding path program 1 times [2020-08-18 16:17:12,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:12,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600865779] [2020-08-18 16:17:12,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:12,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:12,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:12,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:12,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600865779] [2020-08-18 16:17:12,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:12,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:12,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911141959] [2020-08-18 16:17:12,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:12,881 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:12,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:12,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:12,882 INFO L87 Difference]: Start difference. First operand 15752 states and 19974 transitions. Second operand 3 states. [2020-08-18 16:17:13,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:13,063 INFO L93 Difference]: Finished difference Result 23820 states and 30216 transitions. [2020-08-18 16:17:13,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:13,063 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 16:17:13,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:13,098 INFO L225 Difference]: With dead ends: 23820 [2020-08-18 16:17:13,099 INFO L226 Difference]: Without dead ends: 16138 [2020-08-18 16:17:13,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:13,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16138 states. [2020-08-18 16:17:13,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16138 to 16136. [2020-08-18 16:17:13,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16136 states. [2020-08-18 16:17:13,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16136 states to 16136 states and 20230 transitions. [2020-08-18 16:17:13,994 INFO L78 Accepts]: Start accepts. Automaton has 16136 states and 20230 transitions. Word has length 30 [2020-08-18 16:17:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:13,995 INFO L479 AbstractCegarLoop]: Abstraction has 16136 states and 20230 transitions. [2020-08-18 16:17:13,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 16136 states and 20230 transitions. [2020-08-18 16:17:14,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:17:14,015 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:14,015 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:14,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 16:17:14,015 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:14,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:14,016 INFO L82 PathProgramCache]: Analyzing trace with hash 791308478, now seen corresponding path program 1 times [2020-08-18 16:17:14,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:14,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [399676334] [2020-08-18 16:17:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:14,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:14,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [399676334] [2020-08-18 16:17:14,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:14,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:14,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484193908] [2020-08-18 16:17:14,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:14,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:14,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:14,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,040 INFO L87 Difference]: Start difference. First operand 16136 states and 20230 transitions. Second operand 3 states. [2020-08-18 16:17:14,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:14,287 INFO L93 Difference]: Finished difference Result 26636 states and 33544 transitions. [2020-08-18 16:17:14,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:14,288 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 16:17:14,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:14,346 INFO L225 Difference]: With dead ends: 26636 [2020-08-18 16:17:14,347 INFO L226 Difference]: Without dead ends: 26634 [2020-08-18 16:17:14,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:14,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26634 states. [2020-08-18 16:17:15,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26634 to 24584. [2020-08-18 16:17:15,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24584 states. [2020-08-18 16:17:15,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24584 states to 24584 states and 29958 transitions. [2020-08-18 16:17:15,081 INFO L78 Accepts]: Start accepts. Automaton has 24584 states and 29958 transitions. Word has length 30 [2020-08-18 16:17:15,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:15,082 INFO L479 AbstractCegarLoop]: Abstraction has 24584 states and 29958 transitions. [2020-08-18 16:17:15,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:15,082 INFO L276 IsEmpty]: Start isEmpty. Operand 24584 states and 29958 transitions. [2020-08-18 16:17:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-18 16:17:15,126 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:15,126 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:15,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 16:17:15,127 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -219808772, now seen corresponding path program 1 times [2020-08-18 16:17:15,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:15,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622109936] [2020-08-18 16:17:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:15,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:15,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:15,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622109936] [2020-08-18 16:17:15,151 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:15,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:15,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293242656] [2020-08-18 16:17:15,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:15,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:15,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:15,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,153 INFO L87 Difference]: Start difference. First operand 24584 states and 29958 transitions. Second operand 3 states. [2020-08-18 16:17:15,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:15,518 INFO L93 Difference]: Finished difference Result 55308 states and 66824 transitions. [2020-08-18 16:17:15,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:15,519 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 30 [2020-08-18 16:17:15,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:15,567 INFO L225 Difference]: With dead ends: 55308 [2020-08-18 16:17:15,568 INFO L226 Difference]: Without dead ends: 31242 [2020-08-18 16:17:15,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:15,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31242 states. [2020-08-18 16:17:16,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31242 to 31240. [2020-08-18 16:17:16,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31240 states. [2020-08-18 16:17:16,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31240 states to 31240 states and 36870 transitions. [2020-08-18 16:17:16,347 INFO L78 Accepts]: Start accepts. Automaton has 31240 states and 36870 transitions. Word has length 30 [2020-08-18 16:17:16,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:16,347 INFO L479 AbstractCegarLoop]: Abstraction has 31240 states and 36870 transitions. [2020-08-18 16:17:16,347 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:16,347 INFO L276 IsEmpty]: Start isEmpty. Operand 31240 states and 36870 transitions. [2020-08-18 16:17:16,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:17:16,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:16,390 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:16,390 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 16:17:16,391 INFO L427 AbstractCegarLoop]: === Iteration 29 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:16,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:16,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1239024833, now seen corresponding path program 1 times [2020-08-18 16:17:16,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:16,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [226067639] [2020-08-18 16:17:16,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:16,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:16,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:16,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [226067639] [2020-08-18 16:17:16,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:16,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:16,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1699600368] [2020-08-18 16:17:16,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:16,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:16,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:16,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,412 INFO L87 Difference]: Start difference. First operand 31240 states and 36870 transitions. Second operand 3 states. [2020-08-18 16:17:16,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:16,716 INFO L93 Difference]: Finished difference Result 46860 states and 55048 transitions. [2020-08-18 16:17:16,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:16,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 16:17:16,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:16,760 INFO L225 Difference]: With dead ends: 46860 [2020-08-18 16:17:16,760 INFO L226 Difference]: Without dead ends: 31754 [2020-08-18 16:17:16,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:16,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31754 states. [2020-08-18 16:17:17,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31754 to 31752. [2020-08-18 16:17:17,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31752 states. [2020-08-18 16:17:17,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31752 states to 31752 states and 36870 transitions. [2020-08-18 16:17:17,605 INFO L78 Accepts]: Start accepts. Automaton has 31752 states and 36870 transitions. Word has length 31 [2020-08-18 16:17:17,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:17,606 INFO L479 AbstractCegarLoop]: Abstraction has 31752 states and 36870 transitions. [2020-08-18 16:17:17,606 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:17,606 INFO L276 IsEmpty]: Start isEmpty. Operand 31752 states and 36870 transitions. [2020-08-18 16:17:17,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:17:17,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:17,654 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:17,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 16:17:17,655 INFO L427 AbstractCegarLoop]: === Iteration 30 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1776078785, now seen corresponding path program 1 times [2020-08-18 16:17:17,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:17,656 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732221065] [2020-08-18 16:17:17,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:17,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:17,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:17,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732221065] [2020-08-18 16:17:17,677 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:17,677 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:17,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494271603] [2020-08-18 16:17:17,678 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:17,678 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:17,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:17,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:17,679 INFO L87 Difference]: Start difference. First operand 31752 states and 36870 transitions. Second operand 3 states. [2020-08-18 16:17:18,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:18,766 INFO L93 Difference]: Finished difference Result 51210 states and 58887 transitions. [2020-08-18 16:17:18,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:18,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 16:17:18,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:18,814 INFO L225 Difference]: With dead ends: 51210 [2020-08-18 16:17:18,814 INFO L226 Difference]: Without dead ends: 51208 [2020-08-18 16:17:18,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:18,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51208 states. [2020-08-18 16:17:19,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51208 to 49160. [2020-08-18 16:17:19,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49160 states. [2020-08-18 16:17:19,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49160 states to 49160 states and 55814 transitions. [2020-08-18 16:17:19,521 INFO L78 Accepts]: Start accepts. Automaton has 49160 states and 55814 transitions. Word has length 31 [2020-08-18 16:17:19,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:19,521 INFO L479 AbstractCegarLoop]: Abstraction has 49160 states and 55814 transitions. [2020-08-18 16:17:19,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:19,522 INFO L276 IsEmpty]: Start isEmpty. Operand 49160 states and 55814 transitions. [2020-08-18 16:17:19,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-08-18 16:17:19,564 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 16:17:19,564 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 16:17:19,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 16:17:19,565 INFO L427 AbstractCegarLoop]: === Iteration 31 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 16:17:19,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 16:17:19,566 INFO L82 PathProgramCache]: Analyzing trace with hash 764961535, now seen corresponding path program 1 times [2020-08-18 16:17:19,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 16:17:19,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [979663545] [2020-08-18 16:17:19,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 16:17:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:19,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 16:17:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 16:17:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 16:17:19,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [979663545] [2020-08-18 16:17:19,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 16:17:19,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 16:17:19,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763623357] [2020-08-18 16:17:19,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 16:17:19,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 16:17:19,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 16:17:19,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:19,592 INFO L87 Difference]: Start difference. First operand 49160 states and 55814 transitions. Second operand 3 states. [2020-08-18 16:17:20,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 16:17:20,350 INFO L93 Difference]: Finished difference Result 109576 states and 122374 transitions. [2020-08-18 16:17:20,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 16:17:20,351 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 31 [2020-08-18 16:17:20,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 16:17:20,352 INFO L225 Difference]: With dead ends: 109576 [2020-08-18 16:17:20,352 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 16:17:20,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 16:17:20,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 16:17:20,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 16:17:20,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 16:17:20,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 16:17:20,444 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 31 [2020-08-18 16:17:20,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 16:17:20,445 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 16:17:20,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 16:17:20,445 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 16:17:20,445 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 16:17:20,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 16:17:20,448 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 16:17:20,477 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-18 16:17:20,477 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:20,477 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 16:17:20,477 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 16:17:20,478 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 177) no Hoare annotation was computed. [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point L118(line 118) no Hoare annotation was computed. [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point L143(line 143) no Hoare annotation was computed. [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point L44(lines 44 46) no Hoare annotation was computed. [2020-08-18 16:17:20,478 INFO L268 CegarLoopResult]: For program point L168(line 168) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L264 CegarLoopResult]: At program point L168-1(lines 5 177) the Hoare annotation is: false [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L127-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L152-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L111-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L103-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L128(line 128) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L95-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,479 INFO L268 CegarLoopResult]: For program point L153(line 153) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L87-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L79-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 177) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L137-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L71(lines 71 73) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L71-2(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,480 INFO L268 CegarLoopResult]: For program point L162-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 175) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 177) the Hoare annotation is: true [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point L138(line 138) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point L163(line 163) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point L122-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point L147-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,481 INFO L268 CegarLoopResult]: For program point L123(line 123) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L148(line 148) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L271 CegarLoopResult]: At program point L173(lines 5 177) the Hoare annotation is: true [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L107-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L132-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L99-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L157-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L91-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L83-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,482 INFO L268 CegarLoopResult]: For program point L75-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,483 INFO L268 CegarLoopResult]: For program point L133(line 133) no Hoare annotation was computed. [2020-08-18 16:17:20,483 INFO L268 CegarLoopResult]: For program point L158(line 158) no Hoare annotation was computed. [2020-08-18 16:17:20,483 INFO L268 CegarLoopResult]: For program point L117-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,483 INFO L268 CegarLoopResult]: For program point L142-1(lines 42 172) no Hoare annotation was computed. [2020-08-18 16:17:20,483 INFO L271 CegarLoopResult]: At program point L167-1(lines 42 172) the Hoare annotation is: true [2020-08-18 16:17:20,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 04:17:20 BoogieIcfgContainer [2020-08-18 16:17:20,504 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 16:17:20,507 INFO L168 Benchmark]: Toolchain (without parser) took 13980.21 ms. Allocated memory was 136.3 MB in the beginning and 1.0 GB in the end (delta: 900.7 MB). Free memory was 99.4 MB in the beginning and 626.8 MB in the end (delta: -527.3 MB). Peak memory consumption was 373.4 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,514 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,515 INFO L168 Benchmark]: CACSL2BoogieTranslator took 275.26 ms. Allocated memory is still 136.3 MB. Free memory was 99.2 MB in the beginning and 87.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,515 INFO L168 Benchmark]: Boogie Preprocessor took 138.08 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 87.9 MB in the beginning and 176.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,516 INFO L168 Benchmark]: RCFGBuilder took 402.77 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 155.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,516 INFO L168 Benchmark]: TraceAbstraction took 13158.81 ms. Allocated memory was 199.2 MB in the beginning and 1.0 GB in the end (delta: 837.8 MB). Free memory was 155.0 MB in the beginning and 626.8 MB in the end (delta: -471.7 MB). Peak memory consumption was 366.1 MB. Max. memory is 7.1 GB. [2020-08-18 16:17:20,518 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 136.3 MB. Free memory was 117.8 MB in the beginning and 117.6 MB in the end (delta: 209.9 kB). Peak memory consumption was 209.9 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 275.26 ms. Allocated memory is still 136.3 MB. Free memory was 99.2 MB in the beginning and 87.9 MB in the end (delta: 11.3 MB). Peak memory consumption was 11.3 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 138.08 ms. Allocated memory was 136.3 MB in the beginning and 199.2 MB in the end (delta: 62.9 MB). Free memory was 87.9 MB in the beginning and 176.4 MB in the end (delta: -88.5 MB). Peak memory consumption was 12.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 402.77 ms. Allocated memory is still 199.2 MB. Free memory was 176.4 MB in the beginning and 155.7 MB in the end (delta: 20.6 MB). Peak memory consumption was 20.6 MB. Max. memory is 7.1 GB. * TraceAbstraction took 13158.81 ms. Allocated memory was 199.2 MB in the beginning and 1.0 GB in the end (delta: 837.8 MB). Free memory was 155.0 MB in the beginning and 626.8 MB in the end (delta: -471.7 MB). Peak memory consumption was 366.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 175]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 42]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 47 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 12.9s, OverallIterations: 31, TraceHistogramMax: 1, AutomataDifference: 5.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2877 SDtfs, 1405 SDslu, 1967 SDs, 0 SdLazy, 165 SolverSat, 31 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 155 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=49160occurred in iteration=30, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 5.8s AutomataMinimizationTime, 31 MinimizatonAttempts, 8224 StatesRemovedByMinimization, 30 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 2058 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 808 NumberOfCodeBlocks, 808 NumberOfCodeBlocksAsserted, 31 NumberOfCheckSat, 777 ConstructedInterpolants, 0 QuantifiedInterpolants, 39912 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 31 InterpolantComputations, 31 PerfectInterpolantSequences, 0/0 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 correct! Received shutdown request...