/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 false -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_9.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 13:19:30,303 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 13:19:30,306 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 13:19:30,347 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 13:19:30,347 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 13:19:30,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 13:19:30,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 13:19:30,362 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 13:19:30,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 13:19:30,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 13:19:30,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 13:19:30,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 13:19:30,369 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 13:19:30,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 13:19:30,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 13:19:30,376 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 13:19:30,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 13:19:30,379 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 13:19:30,381 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 13:19:30,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 13:19:30,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 13:19:30,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 13:19:30,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 13:19:30,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 13:19:30,411 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 13:19:30,424 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 13:19:30,424 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 13:19:30,426 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 13:19:30,428 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 [2020-08-21 13:19:30,471 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 13:19:30,471 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 13:19:30,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 13:19:30,473 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 13:19:30,474 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 13:19:30,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 13:19:30,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 13:19:30,474 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 13:19:30,474 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 13:19:30,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 13:19:30,476 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 13:19:30,476 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 13:19:30,476 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 13:19:30,477 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 13:19:30,477 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 13:19:30,477 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 13:19:30,478 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 13:19:30,478 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 13:19:30,478 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 13:19:30,478 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 13:19:30,478 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 13:19:30,479 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 13:19:30,479 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 13:19:30,479 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 13:19:30,480 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 13:19:30,480 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 13:19:30,480 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 13:19:30,480 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 13:19:30,480 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 13:19:30,481 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 -> false [2020-08-21 13:19:30,839 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 13:19:30,855 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 13:19:30,861 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 13:19:30,862 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 13:19:30,863 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 13:19:30,864 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 13:19:30,921 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/badd6a1bc/42ce0544f5c54fb5872a0a3409f1af52/FLAG4a3c05ed2 [2020-08-21 13:19:31,403 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 13:19:31,404 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_9.c [2020-08-21 13:19:31,415 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/badd6a1bc/42ce0544f5c54fb5872a0a3409f1af52/FLAG4a3c05ed2 [2020-08-21 13:19:31,762 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/badd6a1bc/42ce0544f5c54fb5872a0a3409f1af52 [2020-08-21 13:19:31,771 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 13:19:31,773 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 13:19:31,774 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:31,774 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 13:19:31,777 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 13:19:31,778 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:31" (1/1) ... [2020-08-21 13:19:31,781 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@50be01d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:31, skipping insertion in model container [2020-08-21 13:19:31,781 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 01:19:31" (1/1) ... [2020-08-21 13:19:31,787 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 13:19:31,807 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 13:19:31,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:31,984 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 13:19:32,008 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 13:19:32,021 INFO L208 MainTranslator]: Completed translation [2020-08-21 13:19:32,021 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32 WrapperNode [2020-08-21 13:19:32,021 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 13:19:32,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 13:19:32,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 13:19:32,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 13:19:32,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,117 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,122 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,122 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,127 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,135 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,137 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (1/1) ... [2020-08-21 13:19:32,139 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 13:19:32,140 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 13:19:32,140 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 13:19:32,140 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 13:19:32,141 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (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 [2020-08-21 13:19:32,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 13:19:32,203 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 13:19:32,203 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 13:19:32,203 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 13:19:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 13:19:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 13:19:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 13:19:32,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 13:19:32,486 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 13:19:32,487 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 13:19:32,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:32 BoogieIcfgContainer [2020-08-21 13:19:32,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 13:19:32,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 13:19:32,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 13:19:32,500 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 13:19:32,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 01:19:31" (1/3) ... [2020-08-21 13:19:32,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f63f639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:32, skipping insertion in model container [2020-08-21 13:19:32,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 01:19:32" (2/3) ... [2020-08-21 13:19:32,503 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f63f639 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 01:19:32, skipping insertion in model container [2020-08-21 13:19:32,503 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 01:19:32" (3/3) ... [2020-08-21 13:19:32,505 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_9.c [2020-08-21 13:19:32,519 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 13:19:32,527 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 13:19:32,545 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 13:19:32,576 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 13:19:32,576 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 13:19:32,577 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 13:19:32,577 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 13:19:32,577 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 13:19:32,577 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 13:19:32,577 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 13:19:32,578 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 13:19:32,600 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states. [2020-08-21 13:19:32,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:19:32,609 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:32,610 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:32,611 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:32,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:32,618 INFO L82 PathProgramCache]: Analyzing trace with hash 691982780, now seen corresponding path program 1 times [2020-08-21 13:19:32,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:32,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [895837425] [2020-08-21 13:19:32,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:32,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:32,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:32,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [895837425] [2020-08-21 13:19:32,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:32,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:32,841 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311094159] [2020-08-21 13:19:32,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:32,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:32,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:32,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:32,867 INFO L87 Difference]: Start difference. First operand 41 states. Second operand 3 states. [2020-08-21 13:19:32,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:32,923 INFO L93 Difference]: Finished difference Result 81 states and 138 transitions. [2020-08-21 13:19:32,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:32,926 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 13:19:32,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:32,938 INFO L225 Difference]: With dead ends: 81 [2020-08-21 13:19:32,939 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 13:19:32,943 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 [2020-08-21 13:19:32,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 13:19:33,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-08-21 13:19:33,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-21 13:19:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 81 transitions. [2020-08-21 13:19:33,020 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 81 transitions. Word has length 19 [2020-08-21 13:19:33,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,022 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 81 transitions. [2020-08-21 13:19:33,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,022 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 81 transitions. [2020-08-21 13:19:33,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-21 13:19:33,025 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,026 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 13:19:33,027 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 13:19:33,027 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,028 INFO L82 PathProgramCache]: Analyzing trace with hash 950148218, now seen corresponding path program 1 times [2020-08-21 13:19:33,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349570832] [2020-08-21 13:19:33,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349570832] [2020-08-21 13:19:33,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179659262] [2020-08-21 13:19:33,184 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,184 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,185 INFO L87 Difference]: Start difference. First operand 46 states and 81 transitions. Second operand 3 states. [2020-08-21 13:19:33,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,212 INFO L93 Difference]: Finished difference Result 107 states and 192 transitions. [2020-08-21 13:19:33,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-21 13:19:33,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,215 INFO L225 Difference]: With dead ends: 107 [2020-08-21 13:19:33,215 INFO L226 Difference]: Without dead ends: 66 [2020-08-21 13:19:33,216 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 [2020-08-21 13:19:33,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-21 13:19:33,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-08-21 13:19:33,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-08-21 13:19:33,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 113 transitions. [2020-08-21 13:19:33,226 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 113 transitions. Word has length 19 [2020-08-21 13:19:33,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,227 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 113 transitions. [2020-08-21 13:19:33,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,227 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 113 transitions. [2020-08-21 13:19:33,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:19:33,228 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,229 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] [2020-08-21 13:19:33,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 13:19:33,229 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,230 INFO L82 PathProgramCache]: Analyzing trace with hash -23156596, now seen corresponding path program 1 times [2020-08-21 13:19:33,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296880599] [2020-08-21 13:19:33,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296880599] [2020-08-21 13:19:33,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230521003] [2020-08-21 13:19:33,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,278 INFO L87 Difference]: Start difference. First operand 64 states and 113 transitions. Second operand 3 states. [2020-08-21 13:19:33,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,301 INFO L93 Difference]: Finished difference Result 99 states and 171 transitions. [2020-08-21 13:19:33,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,302 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 13:19:33,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,303 INFO L225 Difference]: With dead ends: 99 [2020-08-21 13:19:33,303 INFO L226 Difference]: Without dead ends: 69 [2020-08-21 13:19:33,304 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 [2020-08-21 13:19:33,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-08-21 13:19:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-08-21 13:19:33,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 13:19:33,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 115 transitions. [2020-08-21 13:19:33,313 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 115 transitions. Word has length 20 [2020-08-21 13:19:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,314 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 115 transitions. [2020-08-21 13:19:33,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 115 transitions. [2020-08-21 13:19:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:19:33,315 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,316 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] [2020-08-21 13:19:33,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 13:19:33,316 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,317 INFO L82 PathProgramCache]: Analyzing trace with hash -609962610, now seen corresponding path program 1 times [2020-08-21 13:19:33,317 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,317 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1952430274] [2020-08-21 13:19:33,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1952430274] [2020-08-21 13:19:33,361 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,362 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690379932] [2020-08-21 13:19:33,362 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,364 INFO L87 Difference]: Start difference. First operand 67 states and 115 transitions. Second operand 3 states. [2020-08-21 13:19:33,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,394 INFO L93 Difference]: Finished difference Result 124 states and 216 transitions. [2020-08-21 13:19:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,395 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 13:19:33,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,398 INFO L225 Difference]: With dead ends: 124 [2020-08-21 13:19:33,398 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 13:19:33,399 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 [2020-08-21 13:19:33,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 13:19:33,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 88. [2020-08-21 13:19:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-08-21 13:19:33,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 152 transitions. [2020-08-21 13:19:33,411 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 152 transitions. Word has length 20 [2020-08-21 13:19:33,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,412 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 152 transitions. [2020-08-21 13:19:33,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,412 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 152 transitions. [2020-08-21 13:19:33,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 13:19:33,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,414 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] [2020-08-21 13:19:33,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 13:19:33,414 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,415 INFO L82 PathProgramCache]: Analyzing trace with hash -351797172, now seen corresponding path program 1 times [2020-08-21 13:19:33,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960282783] [2020-08-21 13:19:33,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960282783] [2020-08-21 13:19:33,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240734764] [2020-08-21 13:19:33,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,454 INFO L87 Difference]: Start difference. First operand 88 states and 152 transitions. Second operand 3 states. [2020-08-21 13:19:33,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,477 INFO L93 Difference]: Finished difference Result 204 states and 358 transitions. [2020-08-21 13:19:33,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,478 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 13:19:33,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,480 INFO L225 Difference]: With dead ends: 204 [2020-08-21 13:19:33,480 INFO L226 Difference]: Without dead ends: 124 [2020-08-21 13:19:33,481 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 [2020-08-21 13:19:33,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-21 13:19:33,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-08-21 13:19:33,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-08-21 13:19:33,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 210 transitions. [2020-08-21 13:19:33,495 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 210 transitions. Word has length 20 [2020-08-21 13:19:33,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,496 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 210 transitions. [2020-08-21 13:19:33,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,496 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 210 transitions. [2020-08-21 13:19:33,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 13:19:33,497 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,498 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] [2020-08-21 13:19:33,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 13:19:33,498 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1728757681, now seen corresponding path program 1 times [2020-08-21 13:19:33,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16899792] [2020-08-21 13:19:33,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,543 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16899792] [2020-08-21 13:19:33,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123307339] [2020-08-21 13:19:33,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,546 INFO L87 Difference]: Start difference. First operand 122 states and 210 transitions. Second operand 3 states. [2020-08-21 13:19:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,571 INFO L93 Difference]: Finished difference Result 183 states and 313 transitions. [2020-08-21 13:19:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,572 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 13:19:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,574 INFO L225 Difference]: With dead ends: 183 [2020-08-21 13:19:33,574 INFO L226 Difference]: Without dead ends: 126 [2020-08-21 13:19:33,575 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 [2020-08-21 13:19:33,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-08-21 13:19:33,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 124. [2020-08-21 13:19:33,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-08-21 13:19:33,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 210 transitions. [2020-08-21 13:19:33,588 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 210 transitions. Word has length 21 [2020-08-21 13:19:33,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,589 INFO L479 AbstractCegarLoop]: Abstraction has 124 states and 210 transitions. [2020-08-21 13:19:33,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,589 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 210 transitions. [2020-08-21 13:19:33,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 13:19:33,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,591 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] [2020-08-21 13:19:33,591 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 13:19:33,591 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1979403601, now seen corresponding path program 1 times [2020-08-21 13:19:33,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415758662] [2020-08-21 13:19:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415758662] [2020-08-21 13:19:33,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102162808] [2020-08-21 13:19:33,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,643 INFO L87 Difference]: Start difference. First operand 124 states and 210 transitions. Second operand 3 states. [2020-08-21 13:19:33,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,661 INFO L93 Difference]: Finished difference Result 228 states and 392 transitions. [2020-08-21 13:19:33,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,662 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 13:19:33,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,664 INFO L225 Difference]: With dead ends: 228 [2020-08-21 13:19:33,664 INFO L226 Difference]: Without dead ends: 226 [2020-08-21 13:19:33,665 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 [2020-08-21 13:19:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-08-21 13:19:33,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 168. [2020-08-21 13:19:33,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-21 13:19:33,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 282 transitions. [2020-08-21 13:19:33,679 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 282 transitions. Word has length 21 [2020-08-21 13:19:33,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,679 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 282 transitions. [2020-08-21 13:19:33,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,680 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 282 transitions. [2020-08-21 13:19:33,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 13:19:33,681 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,682 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] [2020-08-21 13:19:33,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 13:19:33,682 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,683 INFO L82 PathProgramCache]: Analyzing trace with hash -2057398257, now seen corresponding path program 1 times [2020-08-21 13:19:33,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884416638] [2020-08-21 13:19:33,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884416638] [2020-08-21 13:19:33,745 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145504327] [2020-08-21 13:19:33,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,748 INFO L87 Difference]: Start difference. First operand 168 states and 282 transitions. Second operand 3 states. [2020-08-21 13:19:33,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,789 INFO L93 Difference]: Finished difference Result 392 states and 664 transitions. [2020-08-21 13:19:33,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,789 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 13:19:33,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,791 INFO L225 Difference]: With dead ends: 392 [2020-08-21 13:19:33,792 INFO L226 Difference]: Without dead ends: 234 [2020-08-21 13:19:33,793 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 [2020-08-21 13:19:33,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-08-21 13:19:33,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-08-21 13:19:33,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-08-21 13:19:33,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 386 transitions. [2020-08-21 13:19:33,809 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 386 transitions. Word has length 21 [2020-08-21 13:19:33,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,810 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 386 transitions. [2020-08-21 13:19:33,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,810 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 386 transitions. [2020-08-21 13:19:33,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:33,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,812 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] [2020-08-21 13:19:33,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 13:19:33,812 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,813 INFO L82 PathProgramCache]: Analyzing trace with hash 1232183873, now seen corresponding path program 1 times [2020-08-21 13:19:33,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849636790] [2020-08-21 13:19:33,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849636790] [2020-08-21 13:19:33,853 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,853 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225361489] [2020-08-21 13:19:33,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,855 INFO L87 Difference]: Start difference. First operand 232 states and 386 transitions. Second operand 3 states. [2020-08-21 13:19:33,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,873 INFO L93 Difference]: Finished difference Result 348 states and 576 transitions. [2020-08-21 13:19:33,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,874 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:33,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,875 INFO L225 Difference]: With dead ends: 348 [2020-08-21 13:19:33,876 INFO L226 Difference]: Without dead ends: 238 [2020-08-21 13:19:33,877 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 [2020-08-21 13:19:33,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-08-21 13:19:33,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 236. [2020-08-21 13:19:33,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-08-21 13:19:33,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 386 transitions. [2020-08-21 13:19:33,892 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 386 transitions. Word has length 22 [2020-08-21 13:19:33,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,893 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 386 transitions. [2020-08-21 13:19:33,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,893 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 386 transitions. [2020-08-21 13:19:33,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:33,895 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,895 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] [2020-08-21 13:19:33,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 13:19:33,895 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,896 INFO L82 PathProgramCache]: Analyzing trace with hash 645377859, now seen corresponding path program 1 times [2020-08-21 13:19:33,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807122399] [2020-08-21 13:19:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807122399] [2020-08-21 13:19:33,921 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744268530] [2020-08-21 13:19:33,922 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,923 INFO L87 Difference]: Start difference. First operand 236 states and 386 transitions. Second operand 3 states. [2020-08-21 13:19:33,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:33,943 INFO L93 Difference]: Finished difference Result 428 states and 712 transitions. [2020-08-21 13:19:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:33,943 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:33,946 INFO L225 Difference]: With dead ends: 428 [2020-08-21 13:19:33,947 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 13:19:33,947 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 [2020-08-21 13:19:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 13:19:33,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 328. [2020-08-21 13:19:33,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-08-21 13:19:33,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 526 transitions. [2020-08-21 13:19:33,960 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 526 transitions. Word has length 22 [2020-08-21 13:19:33,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:33,961 INFO L479 AbstractCegarLoop]: Abstraction has 328 states and 526 transitions. [2020-08-21 13:19:33,961 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:33,961 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 526 transitions. [2020-08-21 13:19:33,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 13:19:33,963 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:33,963 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] [2020-08-21 13:19:33,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 13:19:33,964 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:33,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:33,964 INFO L82 PathProgramCache]: Analyzing trace with hash 903543297, now seen corresponding path program 1 times [2020-08-21 13:19:33,964 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:33,965 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528457948] [2020-08-21 13:19:33,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:33,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:33,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:33,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:33,990 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528457948] [2020-08-21 13:19:33,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:33,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:33,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34426891] [2020-08-21 13:19:33,991 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:33,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:33,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:33,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:33,992 INFO L87 Difference]: Start difference. First operand 328 states and 526 transitions. Second operand 3 states. [2020-08-21 13:19:34,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,019 INFO L93 Difference]: Finished difference Result 764 states and 1232 transitions. [2020-08-21 13:19:34,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,019 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 13:19:34,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,022 INFO L225 Difference]: With dead ends: 764 [2020-08-21 13:19:34,022 INFO L226 Difference]: Without dead ends: 450 [2020-08-21 13:19:34,024 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 [2020-08-21 13:19:34,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 450 states. [2020-08-21 13:19:34,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 450 to 448. [2020-08-21 13:19:34,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 448 states. [2020-08-21 13:19:34,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 710 transitions. [2020-08-21 13:19:34,041 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 710 transitions. Word has length 22 [2020-08-21 13:19:34,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,041 INFO L479 AbstractCegarLoop]: Abstraction has 448 states and 710 transitions. [2020-08-21 13:19:34,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,041 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 710 transitions. [2020-08-21 13:19:34,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:34,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,043 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] [2020-08-21 13:19:34,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 13:19:34,043 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1467908124, now seen corresponding path program 1 times [2020-08-21 13:19:34,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,044 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4260075] [2020-08-21 13:19:34,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,074 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4260075] [2020-08-21 13:19:34,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,075 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455343002] [2020-08-21 13:19:34,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,077 INFO L87 Difference]: Start difference. First operand 448 states and 710 transitions. Second operand 3 states. [2020-08-21 13:19:34,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,095 INFO L93 Difference]: Finished difference Result 672 states and 1060 transitions. [2020-08-21 13:19:34,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,096 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:34,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,099 INFO L225 Difference]: With dead ends: 672 [2020-08-21 13:19:34,099 INFO L226 Difference]: Without dead ends: 458 [2020-08-21 13:19:34,100 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 [2020-08-21 13:19:34,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2020-08-21 13:19:34,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 456. [2020-08-21 13:19:34,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 456 states. [2020-08-21 13:19:34,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 710 transitions. [2020-08-21 13:19:34,115 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 710 transitions. Word has length 23 [2020-08-21 13:19:34,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,115 INFO L479 AbstractCegarLoop]: Abstraction has 456 states and 710 transitions. [2020-08-21 13:19:34,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,116 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 710 transitions. [2020-08-21 13:19:34,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:34,117 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,117 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] [2020-08-21 13:19:34,117 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 13:19:34,117 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,118 INFO L82 PathProgramCache]: Analyzing trace with hash -2054714138, now seen corresponding path program 1 times [2020-08-21 13:19:34,118 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,118 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793562375] [2020-08-21 13:19:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793562375] [2020-08-21 13:19:34,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398981369] [2020-08-21 13:19:34,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,145 INFO L87 Difference]: Start difference. First operand 456 states and 710 transitions. Second operand 3 states. [2020-08-21 13:19:34,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,166 INFO L93 Difference]: Finished difference Result 812 states and 1288 transitions. [2020-08-21 13:19:34,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,167 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,171 INFO L225 Difference]: With dead ends: 812 [2020-08-21 13:19:34,172 INFO L226 Difference]: Without dead ends: 810 [2020-08-21 13:19:34,172 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 [2020-08-21 13:19:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 810 states. [2020-08-21 13:19:34,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 810 to 648. [2020-08-21 13:19:34,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 648 states. [2020-08-21 13:19:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 982 transitions. [2020-08-21 13:19:34,191 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 982 transitions. Word has length 23 [2020-08-21 13:19:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,192 INFO L479 AbstractCegarLoop]: Abstraction has 648 states and 982 transitions. [2020-08-21 13:19:34,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 982 transitions. [2020-08-21 13:19:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 13:19:34,194 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,194 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, 1] [2020-08-21 13:19:34,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 13:19:34,194 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1796548700, now seen corresponding path program 1 times [2020-08-21 13:19:34,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924847304] [2020-08-21 13:19:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924847304] [2020-08-21 13:19:34,229 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647816304] [2020-08-21 13:19:34,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,230 INFO L87 Difference]: Start difference. First operand 648 states and 982 transitions. Second operand 3 states. [2020-08-21 13:19:34,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,262 INFO L93 Difference]: Finished difference Result 1500 states and 2280 transitions. [2020-08-21 13:19:34,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,263 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 13:19:34,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,268 INFO L225 Difference]: With dead ends: 1500 [2020-08-21 13:19:34,268 INFO L226 Difference]: Without dead ends: 874 [2020-08-21 13:19:34,270 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 [2020-08-21 13:19:34,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2020-08-21 13:19:34,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 872. [2020-08-21 13:19:34,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 872 states. [2020-08-21 13:19:34,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 1302 transitions. [2020-08-21 13:19:34,302 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 1302 transitions. Word has length 23 [2020-08-21 13:19:34,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,302 INFO L479 AbstractCegarLoop]: Abstraction has 872 states and 1302 transitions. [2020-08-21 13:19:34,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,302 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 1302 transitions. [2020-08-21 13:19:34,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:34,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,304 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] [2020-08-21 13:19:34,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 13:19:34,305 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,305 INFO L82 PathProgramCache]: Analyzing trace with hash 728586230, now seen corresponding path program 1 times [2020-08-21 13:19:34,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,306 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1665089003] [2020-08-21 13:19:34,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1665089003] [2020-08-21 13:19:34,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249220482] [2020-08-21 13:19:34,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,334 INFO L87 Difference]: Start difference. First operand 872 states and 1302 transitions. Second operand 3 states. [2020-08-21 13:19:34,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,362 INFO L93 Difference]: Finished difference Result 1308 states and 1944 transitions. [2020-08-21 13:19:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,362 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,367 INFO L225 Difference]: With dead ends: 1308 [2020-08-21 13:19:34,367 INFO L226 Difference]: Without dead ends: 890 [2020-08-21 13:19:34,369 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 [2020-08-21 13:19:34,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2020-08-21 13:19:34,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 888. [2020-08-21 13:19:34,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 888 states. [2020-08-21 13:19:34,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1302 transitions. [2020-08-21 13:19:34,399 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1302 transitions. Word has length 24 [2020-08-21 13:19:34,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,400 INFO L479 AbstractCegarLoop]: Abstraction has 888 states and 1302 transitions. [2020-08-21 13:19:34,400 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,400 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1302 transitions. [2020-08-21 13:19:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:34,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,402 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] [2020-08-21 13:19:34,402 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 13:19:34,403 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,403 INFO L82 PathProgramCache]: Analyzing trace with hash 141780216, now seen corresponding path program 1 times [2020-08-21 13:19:34,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884602637] [2020-08-21 13:19:34,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884602637] [2020-08-21 13:19:34,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,439 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830584268] [2020-08-21 13:19:34,440 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,440 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,441 INFO L87 Difference]: Start difference. First operand 888 states and 1302 transitions. Second operand 3 states. [2020-08-21 13:19:34,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,471 INFO L93 Difference]: Finished difference Result 1548 states and 2312 transitions. [2020-08-21 13:19:34,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,472 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:34,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,479 INFO L225 Difference]: With dead ends: 1548 [2020-08-21 13:19:34,479 INFO L226 Difference]: Without dead ends: 1546 [2020-08-21 13:19:34,481 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 [2020-08-21 13:19:34,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-21 13:19:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1288. [2020-08-21 13:19:34,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1288 states. [2020-08-21 13:19:34,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1288 states to 1288 states and 1830 transitions. [2020-08-21 13:19:34,522 INFO L78 Accepts]: Start accepts. Automaton has 1288 states and 1830 transitions. Word has length 24 [2020-08-21 13:19:34,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,522 INFO L479 AbstractCegarLoop]: Abstraction has 1288 states and 1830 transitions. [2020-08-21 13:19:34,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,522 INFO L276 IsEmpty]: Start isEmpty. Operand 1288 states and 1830 transitions. [2020-08-21 13:19:34,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 13:19:34,525 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,525 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] [2020-08-21 13:19:34,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 13:19:34,526 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,526 INFO L82 PathProgramCache]: Analyzing trace with hash 399945654, now seen corresponding path program 1 times [2020-08-21 13:19:34,526 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137083413] [2020-08-21 13:19:34,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137083413] [2020-08-21 13:19:34,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190880024] [2020-08-21 13:19:34,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,555 INFO L87 Difference]: Start difference. First operand 1288 states and 1830 transitions. Second operand 3 states. [2020-08-21 13:19:34,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,593 INFO L93 Difference]: Finished difference Result 2956 states and 4200 transitions. [2020-08-21 13:19:34,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,594 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 13:19:34,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,601 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 13:19:34,601 INFO L226 Difference]: Without dead ends: 1706 [2020-08-21 13:19:34,604 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 [2020-08-21 13:19:34,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1706 states. [2020-08-21 13:19:34,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1706 to 1704. [2020-08-21 13:19:34,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1704 states. [2020-08-21 13:19:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1704 states to 1704 states and 2374 transitions. [2020-08-21 13:19:34,651 INFO L78 Accepts]: Start accepts. Automaton has 1704 states and 2374 transitions. Word has length 24 [2020-08-21 13:19:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,652 INFO L479 AbstractCegarLoop]: Abstraction has 1704 states and 2374 transitions. [2020-08-21 13:19:34,652 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,652 INFO L276 IsEmpty]: Start isEmpty. Operand 1704 states and 2374 transitions. [2020-08-21 13:19:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:34,654 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,654 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] [2020-08-21 13:19:34,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 13:19:34,654 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,655 INFO L82 PathProgramCache]: Analyzing trace with hash 100434809, now seen corresponding path program 1 times [2020-08-21 13:19:34,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203917743] [2020-08-21 13:19:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203917743] [2020-08-21 13:19:34,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,677 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264735367] [2020-08-21 13:19:34,677 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,678 INFO L87 Difference]: Start difference. First operand 1704 states and 2374 transitions. Second operand 3 states. [2020-08-21 13:19:34,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,713 INFO L93 Difference]: Finished difference Result 2556 states and 3544 transitions. [2020-08-21 13:19:34,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,714 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:34,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,721 INFO L225 Difference]: With dead ends: 2556 [2020-08-21 13:19:34,721 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 13:19:34,723 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 [2020-08-21 13:19:34,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 13:19:34,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1736. [2020-08-21 13:19:34,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1736 states. [2020-08-21 13:19:34,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1736 states to 1736 states and 2374 transitions. [2020-08-21 13:19:34,771 INFO L78 Accepts]: Start accepts. Automaton has 1736 states and 2374 transitions. Word has length 25 [2020-08-21 13:19:34,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,771 INFO L479 AbstractCegarLoop]: Abstraction has 1736 states and 2374 transitions. [2020-08-21 13:19:34,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1736 states and 2374 transitions. [2020-08-21 13:19:34,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:34,773 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,773 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] [2020-08-21 13:19:34,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 13:19:34,774 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,774 INFO L82 PathProgramCache]: Analyzing trace with hash -486371205, now seen corresponding path program 1 times [2020-08-21 13:19:34,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1600736668] [2020-08-21 13:19:34,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1600736668] [2020-08-21 13:19:34,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204727359] [2020-08-21 13:19:34,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,794 INFO L87 Difference]: Start difference. First operand 1736 states and 2374 transitions. Second operand 3 states. [2020-08-21 13:19:34,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:34,841 INFO L93 Difference]: Finished difference Result 2956 states and 4104 transitions. [2020-08-21 13:19:34,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:34,842 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:34,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:34,855 INFO L225 Difference]: With dead ends: 2956 [2020-08-21 13:19:34,855 INFO L226 Difference]: Without dead ends: 2954 [2020-08-21 13:19:34,857 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 [2020-08-21 13:19:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-21 13:19:34,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2568. [2020-08-21 13:19:34,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2568 states. [2020-08-21 13:19:34,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2568 states to 2568 states and 3398 transitions. [2020-08-21 13:19:34,944 INFO L78 Accepts]: Start accepts. Automaton has 2568 states and 3398 transitions. Word has length 25 [2020-08-21 13:19:34,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:34,944 INFO L479 AbstractCegarLoop]: Abstraction has 2568 states and 3398 transitions. [2020-08-21 13:19:34,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:34,944 INFO L276 IsEmpty]: Start isEmpty. Operand 2568 states and 3398 transitions. [2020-08-21 13:19:34,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 13:19:34,948 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:34,948 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] [2020-08-21 13:19:34,949 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 13:19:34,949 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:34,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:34,949 INFO L82 PathProgramCache]: Analyzing trace with hash -228205767, now seen corresponding path program 1 times [2020-08-21 13:19:34,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:34,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649490302] [2020-08-21 13:19:34,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:34,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:34,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:34,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649490302] [2020-08-21 13:19:34,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:34,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:34,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720669878] [2020-08-21 13:19:34,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:34,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:34,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:34,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:34,971 INFO L87 Difference]: Start difference. First operand 2568 states and 3398 transitions. Second operand 3 states. [2020-08-21 13:19:35,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,040 INFO L93 Difference]: Finished difference Result 5836 states and 7688 transitions. [2020-08-21 13:19:35,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:35,041 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 13:19:35,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,057 INFO L225 Difference]: With dead ends: 5836 [2020-08-21 13:19:35,057 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 13:19:35,063 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 [2020-08-21 13:19:35,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 13:19:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 3336. [2020-08-21 13:19:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3336 states. [2020-08-21 13:19:35,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 4294 transitions. [2020-08-21 13:19:35,160 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 4294 transitions. Word has length 25 [2020-08-21 13:19:35,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,160 INFO L479 AbstractCegarLoop]: Abstraction has 3336 states and 4294 transitions. [2020-08-21 13:19:35,160 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:35,161 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 4294 transitions. [2020-08-21 13:19:35,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:35,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,165 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] [2020-08-21 13:19:35,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 13:19:35,166 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,166 INFO L82 PathProgramCache]: Analyzing trace with hash 2102577579, now seen corresponding path program 1 times [2020-08-21 13:19:35,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1376961079] [2020-08-21 13:19:35,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:35,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1376961079] [2020-08-21 13:19:35,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:35,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:35,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050419988] [2020-08-21 13:19:35,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:35,189 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:35,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:35,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:35,189 INFO L87 Difference]: Start difference. First operand 3336 states and 4294 transitions. Second operand 3 states. [2020-08-21 13:19:35,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,243 INFO L93 Difference]: Finished difference Result 5004 states and 6408 transitions. [2020-08-21 13:19:35,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:35,243 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:35,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,258 INFO L225 Difference]: With dead ends: 5004 [2020-08-21 13:19:35,258 INFO L226 Difference]: Without dead ends: 3402 [2020-08-21 13:19:35,262 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 [2020-08-21 13:19:35,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3402 states. [2020-08-21 13:19:35,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3402 to 3400. [2020-08-21 13:19:35,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3400 states. [2020-08-21 13:19:35,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3400 states to 3400 states and 4294 transitions. [2020-08-21 13:19:35,376 INFO L78 Accepts]: Start accepts. Automaton has 3400 states and 4294 transitions. Word has length 26 [2020-08-21 13:19:35,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,377 INFO L479 AbstractCegarLoop]: Abstraction has 3400 states and 4294 transitions. [2020-08-21 13:19:35,377 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:35,377 INFO L276 IsEmpty]: Start isEmpty. Operand 3400 states and 4294 transitions. [2020-08-21 13:19:35,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:35,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,381 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] [2020-08-21 13:19:35,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 13:19:35,382 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1515771565, now seen corresponding path program 1 times [2020-08-21 13:19:35,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818486460] [2020-08-21 13:19:35,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:35,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818486460] [2020-08-21 13:19:35,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:35,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:35,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829480874] [2020-08-21 13:19:35,405 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:35,405 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:35,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:35,406 INFO L87 Difference]: Start difference. First operand 3400 states and 4294 transitions. Second operand 3 states. [2020-08-21 13:19:35,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,494 INFO L93 Difference]: Finished difference Result 9804 states and 12104 transitions. [2020-08-21 13:19:35,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:35,494 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:35,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,521 INFO L225 Difference]: With dead ends: 9804 [2020-08-21 13:19:35,522 INFO L226 Difference]: Without dead ends: 6538 [2020-08-21 13:19:35,529 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 [2020-08-21 13:19:35,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6538 states. [2020-08-21 13:19:35,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6538 to 6536. [2020-08-21 13:19:35,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 13:19:35,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7814 transitions. [2020-08-21 13:19:35,692 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7814 transitions. Word has length 26 [2020-08-21 13:19:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:35,692 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7814 transitions. [2020-08-21 13:19:35,692 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7814 transitions. [2020-08-21 13:19:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 13:19:35,700 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:35,700 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] [2020-08-21 13:19:35,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 13:19:35,701 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:35,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:35,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1257606127, now seen corresponding path program 1 times [2020-08-21 13:19:35,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:35,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147200947] [2020-08-21 13:19:35,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:35,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147200947] [2020-08-21 13:19:35,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:35,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:35,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174146232] [2020-08-21 13:19:35,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:35,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:35,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:35,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:35,722 INFO L87 Difference]: Start difference. First operand 6536 states and 7814 transitions. Second operand 3 states. [2020-08-21 13:19:35,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:35,862 INFO L93 Difference]: Finished difference Result 7052 states and 8584 transitions. [2020-08-21 13:19:35,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:35,863 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 13:19:35,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:35,881 INFO L225 Difference]: With dead ends: 7052 [2020-08-21 13:19:35,882 INFO L226 Difference]: Without dead ends: 7050 [2020-08-21 13:19:35,929 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 [2020-08-21 13:19:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7050 states. [2020-08-21 13:19:36,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7050 to 6536. [2020-08-21 13:19:36,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6536 states. [2020-08-21 13:19:36,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6536 states to 6536 states and 7686 transitions. [2020-08-21 13:19:36,087 INFO L78 Accepts]: Start accepts. Automaton has 6536 states and 7686 transitions. Word has length 26 [2020-08-21 13:19:36,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:36,087 INFO L479 AbstractCegarLoop]: Abstraction has 6536 states and 7686 transitions. [2020-08-21 13:19:36,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:36,087 INFO L276 IsEmpty]: Start isEmpty. Operand 6536 states and 7686 transitions. [2020-08-21 13:19:36,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:19:36,102 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:36,102 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] [2020-08-21 13:19:36,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 13:19:36,102 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:36,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:36,102 INFO L82 PathProgramCache]: Analyzing trace with hash -255505650, now seen corresponding path program 1 times [2020-08-21 13:19:36,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:36,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2107872136] [2020-08-21 13:19:36,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:36,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:36,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:36,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2107872136] [2020-08-21 13:19:36,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:36,128 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:36,128 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060302534] [2020-08-21 13:19:36,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:36,129 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:36,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:36,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:36,129 INFO L87 Difference]: Start difference. First operand 6536 states and 7686 transitions. Second operand 3 states. [2020-08-21 13:19:36,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:36,255 INFO L93 Difference]: Finished difference Result 10634 states and 12423 transitions. [2020-08-21 13:19:36,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:36,256 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 13:19:36,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:36,276 INFO L225 Difference]: With dead ends: 10634 [2020-08-21 13:19:36,276 INFO L226 Difference]: Without dead ends: 10632 [2020-08-21 13:19:36,280 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 [2020-08-21 13:19:36,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10632 states. [2020-08-21 13:19:36,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10632 to 10120. [2020-08-21 13:19:36,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10120 states. [2020-08-21 13:19:36,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10120 states to 10120 states and 11654 transitions. [2020-08-21 13:19:36,508 INFO L78 Accepts]: Start accepts. Automaton has 10120 states and 11654 transitions. Word has length 27 [2020-08-21 13:19:36,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:36,508 INFO L479 AbstractCegarLoop]: Abstraction has 10120 states and 11654 transitions. [2020-08-21 13:19:36,509 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:36,509 INFO L276 IsEmpty]: Start isEmpty. Operand 10120 states and 11654 transitions. [2020-08-21 13:19:36,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 13:19:36,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 13:19:36,524 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] [2020-08-21 13:19:36,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 13:19:36,524 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 13:19:36,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 13:19:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash 2659788, now seen corresponding path program 1 times [2020-08-21 13:19:36,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 13:19:36,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059364785] [2020-08-21 13:19:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 13:19:36,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 13:19:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 13:19:36,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 13:19:36,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059364785] [2020-08-21 13:19:36,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 13:19:36,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 13:19:36,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817409508] [2020-08-21 13:19:36,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 13:19:36,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 13:19:36,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 13:19:36,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 13:19:36,555 INFO L87 Difference]: Start difference. First operand 10120 states and 11654 transitions. Second operand 3 states. [2020-08-21 13:19:36,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 13:19:36,728 INFO L93 Difference]: Finished difference Result 22664 states and 25734 transitions. [2020-08-21 13:19:36,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 13:19:36,728 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 13:19:36,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 13:19:36,729 INFO L225 Difference]: With dead ends: 22664 [2020-08-21 13:19:36,729 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 13:19:36,763 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 [2020-08-21 13:19:36,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 13:19:36,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 13:19:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 13:19:36,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 13:19:36,764 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 27 [2020-08-21 13:19:36,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 13:19:36,765 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 13:19:36,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 13:19:36,765 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 13:19:36,765 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 13:19:36,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 13:19:36,768 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 13:19:36,797 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 13:19:36,797 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:36,797 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 13:19:36,798 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point L93-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 149) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point L85-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point L110(line 110) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point L77-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,798 INFO L268 CegarLoopResult]: For program point L135(line 135) no Hoare annotation was computed. [2020-08-21 13:19:36,799 INFO L268 CegarLoopResult]: For program point L69-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,799 INFO L268 CegarLoopResult]: For program point L61(lines 61 63) no Hoare annotation was computed. [2020-08-21 13:19:36,799 INFO L268 CegarLoopResult]: For program point L61-2(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,800 INFO L268 CegarLoopResult]: For program point L119-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,800 INFO L268 CegarLoopResult]: For program point L120(line 120) no Hoare annotation was computed. [2020-08-21 13:19:36,800 INFO L271 CegarLoopResult]: At program point L145(lines 5 149) the Hoare annotation is: true [2020-08-21 13:19:36,800 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 149) no Hoare annotation was computed. [2020-08-21 13:19:36,800 INFO L268 CegarLoopResult]: For program point L104-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L38(lines 38 40) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L129-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 147) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 149) the Hoare annotation is: true [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L105(line 105) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L130(line 130) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L89-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,801 INFO L268 CegarLoopResult]: For program point L114-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L81-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L271 CegarLoopResult]: At program point L139-1(lines 36 144) the Hoare annotation is: true [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L73-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L65-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L115(line 115) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L140(line 140) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L264 CegarLoopResult]: At program point L140-1(lines 5 149) the Hoare annotation is: false [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L99-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,802 INFO L268 CegarLoopResult]: For program point L124-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,803 INFO L268 CegarLoopResult]: For program point L100(line 100) no Hoare annotation was computed. [2020-08-21 13:19:36,803 INFO L268 CegarLoopResult]: For program point L125(line 125) no Hoare annotation was computed. [2020-08-21 13:19:36,803 INFO L268 CegarLoopResult]: For program point L109-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,803 INFO L268 CegarLoopResult]: For program point L134-1(lines 36 144) no Hoare annotation was computed. [2020-08-21 13:19:36,828 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 01:19:36 BoogieIcfgContainer [2020-08-21 13:19:36,828 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 13:19:36,831 INFO L168 Benchmark]: Toolchain (without parser) took 5057.68 ms. Allocated memory was 146.8 MB in the beginning and 343.4 MB in the end (delta: 196.6 MB). Free memory was 102.4 MB in the beginning and 140.9 MB in the end (delta: -38.5 MB). Peak memory consumption was 158.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,832 INFO L168 Benchmark]: CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,833 INFO L168 Benchmark]: CACSL2BoogieTranslator took 248.35 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,833 INFO L168 Benchmark]: Boogie Preprocessor took 117.27 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,837 INFO L168 Benchmark]: RCFGBuilder took 353.98 ms. Allocated memory is still 201.9 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,843 INFO L168 Benchmark]: TraceAbstraction took 4333.31 ms. Allocated memory was 201.9 MB in the beginning and 343.4 MB in the end (delta: 141.6 MB). Free memory was 160.4 MB in the beginning and 140.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. [2020-08-21 13:19:36,846 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18 ms. Allocated memory is still 146.8 MB. Free memory was 121.3 MB in the beginning and 121.1 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 248.35 ms. Allocated memory is still 146.8 MB. Free memory was 102.2 MB in the beginning and 91.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 117.27 ms. Allocated memory was 146.8 MB in the beginning and 201.9 MB in the end (delta: 55.1 MB). Free memory was 91.7 MB in the beginning and 178.7 MB in the end (delta: -87.0 MB). Peak memory consumption was 10.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 353.98 ms. Allocated memory is still 201.9 MB. Free memory was 178.7 MB in the beginning and 160.4 MB in the end (delta: 18.3 MB). Peak memory consumption was 18.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 4333.31 ms. Allocated memory was 201.9 MB in the beginning and 343.4 MB in the end (delta: 141.6 MB). Free memory was 160.4 MB in the beginning and 140.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 161.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 147]: 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: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 41 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 4.1s, OverallIterations: 25, TraceHistogramMax: 1, AutomataDifference: 1.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1937 SDtfs, 926 SDslu, 1314 SDs, 0 SdLazy, 133 SolverSat, 25 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 125 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=10120occurred in iteration=24, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.2s AutomataMinimizationTime, 25 MinimizatonAttempts, 2072 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 522 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, 0.5s InterpolantComputationTime, 575 NumberOfCodeBlocks, 575 NumberOfCodeBlocksAsserted, 25 NumberOfCheckSat, 550 ConstructedInterpolants, 0 QuantifiedInterpolants, 23930 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 25 InterpolantComputations, 25 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...