/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=HIGHLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/locks/test_locks_10.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-21 18:57:20,903 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 18:57:20,906 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 18:57:20,949 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2020-08-21 18:57:20,960 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 18:57:20,961 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 18:57:20,962 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 18:57:20,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 18:57:20,963 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 18:57:20,964 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 18:57:20,966 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 18:57:20,968 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 18:57:20,969 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 18:57:20,970 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 18:57:20,972 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 18:57:20,972 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 18:57:20,975 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-21 18:57:20,985 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 18:57:21,008 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 18:57:21,008 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 18:57:21,009 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 18:57:21,010 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 18:57:21,010 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 18:57:21,010 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 18:57:21,010 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 18:57:21,010 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 18:57:21,011 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 18:57:21,011 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 18:57:21,011 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 18:57:21,011 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 18:57:21,011 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 18:57:21,012 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 18:57:21,012 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 18:57:21,012 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 18:57:21,012 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 18:57:21,013 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 18:57:21,013 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 18:57:21,013 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 18:57:21,013 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 18:57:21,013 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 18:57:21,014 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 18:57:21,014 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 18:57:21,014 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 18:57:21,014 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 18:57:21,014 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 18:57:21,015 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 18:57:21,015 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 18:57:21,015 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=HIGHLEXORDER;log-additional-information=true; [2020-08-21 18:57:21,347 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 18:57:21,360 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 18:57:21,364 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 18:57:21,366 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 18:57:21,366 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 18:57:21,367 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 18:57:21,428 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36213fab8/62af520ab9f34430945d7ff5d4c6d03d/FLAG981fa74f0 [2020-08-21 18:57:21,950 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 18:57:21,951 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_10.c [2020-08-21 18:57:21,960 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36213fab8/62af520ab9f34430945d7ff5d4c6d03d/FLAG981fa74f0 [2020-08-21 18:57:22,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/36213fab8/62af520ab9f34430945d7ff5d4c6d03d [2020-08-21 18:57:22,287 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 18:57:22,290 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 18:57:22,295 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:22,295 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 18:57:22,300 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 18:57:22,301 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,306 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@547fd1e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22, skipping insertion in model container [2020-08-21 18:57:22,307 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,316 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 18:57:22,349 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 18:57:22,591 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:22,596 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 18:57:22,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 18:57:22,643 INFO L208 MainTranslator]: Completed translation [2020-08-21 18:57:22,643 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22 WrapperNode [2020-08-21 18:57:22,643 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 18:57:22,644 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 18:57:22,644 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 18:57:22,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 18:57:22,740 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,741 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,748 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,749 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,784 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (1/1) ... [2020-08-21 18:57:22,786 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 18:57:22,787 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 18:57:22,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 18:57:22,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 18:57:22,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (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 18:57:22,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 18:57:22,848 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 18:57:22,848 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 18:57:22,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 18:57:22,848 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 18:57:22,849 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 18:57:22,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 18:57:22,849 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 18:57:23,152 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 18:57:23,153 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-21 18:57:23,157 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:23 BoogieIcfgContainer [2020-08-21 18:57:23,158 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 18:57:23,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 18:57:23,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 18:57:23,162 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 18:57:23,163 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 06:57:22" (1/3) ... [2020-08-21 18:57:23,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6598dc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:23, skipping insertion in model container [2020-08-21 18:57:23,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 06:57:22" (2/3) ... [2020-08-21 18:57:23,164 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6598dc22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:57:23, skipping insertion in model container [2020-08-21 18:57:23,164 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:57:23" (3/3) ... [2020-08-21 18:57:23,166 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_10.c [2020-08-21 18:57:23,178 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 18:57:23,186 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 18:57:23,204 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 18:57:23,235 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 18:57:23,235 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 18:57:23,236 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 18:57:23,236 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 18:57:23,236 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 18:57:23,237 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 18:57:23,237 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 18:57:23,238 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 18:57:23,278 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-08-21 18:57:23,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:57:23,304 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,308 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 18:57:23,309 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,327 INFO L82 PathProgramCache]: Analyzing trace with hash -917347053, now seen corresponding path program 1 times [2020-08-21 18:57:23,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21189688] [2020-08-21 18:57:23,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,556 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 18:57:23,557 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21189688] [2020-08-21 18:57:23,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,560 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837273485] [2020-08-21 18:57:23,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,586 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 3 states. [2020-08-21 18:57:23,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,652 INFO L93 Difference]: Finished difference Result 87 states and 150 transitions. [2020-08-21 18:57:23,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:23,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:57:23,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,666 INFO L225 Difference]: With dead ends: 87 [2020-08-21 18:57:23,666 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 18:57:23,670 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 18:57:23,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 18:57:23,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 50. [2020-08-21 18:57:23,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-08-21 18:57:23,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 89 transitions. [2020-08-21 18:57:23,719 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 89 transitions. Word has length 20 [2020-08-21 18:57:23,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,719 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 89 transitions. [2020-08-21 18:57:23,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:23,720 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 89 transitions. [2020-08-21 18:57:23,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 18:57:23,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,721 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 18:57:23,722 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 18:57:23,722 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,723 INFO L82 PathProgramCache]: Analyzing trace with hash -1504153067, now seen corresponding path program 1 times [2020-08-21 18:57:23,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1264506875] [2020-08-21 18:57:23,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,816 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 18:57:23,817 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1264506875] [2020-08-21 18:57:23,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589028760] [2020-08-21 18:57:23,822 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,822 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,823 INFO L87 Difference]: Start difference. First operand 50 states and 89 transitions. Second operand 3 states. [2020-08-21 18:57:23,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,860 INFO L93 Difference]: Finished difference Result 117 states and 212 transitions. [2020-08-21 18:57:23,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:23,861 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-21 18:57:23,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,863 INFO L225 Difference]: With dead ends: 117 [2020-08-21 18:57:23,863 INFO L226 Difference]: Without dead ends: 72 [2020-08-21 18:57:23,865 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 18:57:23,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-21 18:57:23,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 70. [2020-08-21 18:57:23,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-08-21 18:57:23,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 125 transitions. [2020-08-21 18:57:23,878 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 125 transitions. Word has length 20 [2020-08-21 18:57:23,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,878 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 125 transitions. [2020-08-21 18:57:23,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:23,879 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 125 transitions. [2020-08-21 18:57:23,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:23,880 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,880 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 18:57:23,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 18:57:23,881 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1627225809, now seen corresponding path program 1 times [2020-08-21 18:57:23,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996838577] [2020-08-21 18:57:23,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:23,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:23,934 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 18:57:23,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996838577] [2020-08-21 18:57:23,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:23,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:23,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498999119] [2020-08-21 18:57:23,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:23,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:23,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:23,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:23,937 INFO L87 Difference]: Start difference. First operand 70 states and 125 transitions. Second operand 3 states. [2020-08-21 18:57:23,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:23,959 INFO L93 Difference]: Finished difference Result 108 states and 189 transitions. [2020-08-21 18:57:23,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:23,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:23,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:23,962 INFO L225 Difference]: With dead ends: 108 [2020-08-21 18:57:23,962 INFO L226 Difference]: Without dead ends: 75 [2020-08-21 18:57:23,963 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 18:57:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-08-21 18:57:23,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 73. [2020-08-21 18:57:23,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 18:57:23,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 127 transitions. [2020-08-21 18:57:23,975 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 127 transitions. Word has length 21 [2020-08-21 18:57:23,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:23,975 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 127 transitions. [2020-08-21 18:57:23,975 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:23,975 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 127 transitions. [2020-08-21 18:57:23,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:23,976 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:23,977 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:23,977 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 18:57:23,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:23,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:23,978 INFO L82 PathProgramCache]: Analyzing trace with hash 616108559, now seen corresponding path program 1 times [2020-08-21 18:57:23,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:23,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081626070] [2020-08-21 18:57:23,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:23,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,027 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 18:57:24,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081626070] [2020-08-21 18:57:24,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268586830] [2020-08-21 18:57:24,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,030 INFO L87 Difference]: Start difference. First operand 73 states and 127 transitions. Second operand 3 states. [2020-08-21 18:57:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,058 INFO L93 Difference]: Finished difference Result 136 states and 240 transitions. [2020-08-21 18:57:24,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,059 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:24,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,061 INFO L225 Difference]: With dead ends: 136 [2020-08-21 18:57:24,061 INFO L226 Difference]: Without dead ends: 134 [2020-08-21 18:57:24,062 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 18:57:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-08-21 18:57:24,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 96. [2020-08-21 18:57:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-21 18:57:24,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 168 transitions. [2020-08-21 18:57:24,081 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 168 transitions. Word has length 21 [2020-08-21 18:57:24,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,082 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 168 transitions. [2020-08-21 18:57:24,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,082 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 168 transitions. [2020-08-21 18:57:24,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-21 18:57:24,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,084 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 18:57:24,084 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 18:57:24,084 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,085 INFO L82 PathProgramCache]: Analyzing trace with hash 29302545, now seen corresponding path program 1 times [2020-08-21 18:57:24,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127629571] [2020-08-21 18:57:24,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,128 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 18:57:24,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127629571] [2020-08-21 18:57:24,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783736476] [2020-08-21 18:57:24,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,131 INFO L87 Difference]: Start difference. First operand 96 states and 168 transitions. Second operand 3 states. [2020-08-21 18:57:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,154 INFO L93 Difference]: Finished difference Result 224 states and 398 transitions. [2020-08-21 18:57:24,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,155 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-21 18:57:24,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,157 INFO L225 Difference]: With dead ends: 224 [2020-08-21 18:57:24,157 INFO L226 Difference]: Without dead ends: 136 [2020-08-21 18:57:24,158 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 18:57:24,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-08-21 18:57:24,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 134. [2020-08-21 18:57:24,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-08-21 18:57:24,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 234 transitions. [2020-08-21 18:57:24,172 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 234 transitions. Word has length 21 [2020-08-21 18:57:24,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,172 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 234 transitions. [2020-08-21 18:57:24,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,173 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 234 transitions. [2020-08-21 18:57:24,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:24,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,174 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 18:57:24,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 18:57:24,175 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,175 INFO L82 PathProgramCache]: Analyzing trace with hash 1919709866, now seen corresponding path program 1 times [2020-08-21 18:57:24,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17142400] [2020-08-21 18:57:24,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,243 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 18:57:24,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17142400] [2020-08-21 18:57:24,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188638239] [2020-08-21 18:57:24,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,246 INFO L87 Difference]: Start difference. First operand 134 states and 234 transitions. Second operand 3 states. [2020-08-21 18:57:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,269 INFO L93 Difference]: Finished difference Result 201 states and 349 transitions. [2020-08-21 18:57:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,269 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,271 INFO L225 Difference]: With dead ends: 201 [2020-08-21 18:57:24,272 INFO L226 Difference]: Without dead ends: 138 [2020-08-21 18:57:24,273 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 18:57:24,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-21 18:57:24,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 136. [2020-08-21 18:57:24,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-08-21 18:57:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 234 transitions. [2020-08-21 18:57:24,286 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 234 transitions. Word has length 22 [2020-08-21 18:57:24,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,287 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 234 transitions. [2020-08-21 18:57:24,287 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,287 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 234 transitions. [2020-08-21 18:57:24,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:24,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:24,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 18:57:24,289 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,307 INFO L82 PathProgramCache]: Analyzing trace with hash 908592616, now seen corresponding path program 1 times [2020-08-21 18:57:24,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926952645] [2020-08-21 18:57:24,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,341 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 18:57:24,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926952645] [2020-08-21 18:57:24,341 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,342 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331183272] [2020-08-21 18:57:24,342 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,343 INFO L87 Difference]: Start difference. First operand 136 states and 234 transitions. Second operand 3 states. [2020-08-21 18:57:24,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,361 INFO L93 Difference]: Finished difference Result 252 states and 440 transitions. [2020-08-21 18:57:24,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,361 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:24,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,364 INFO L225 Difference]: With dead ends: 252 [2020-08-21 18:57:24,364 INFO L226 Difference]: Without dead ends: 250 [2020-08-21 18:57:24,365 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 18:57:24,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-21 18:57:24,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 184. [2020-08-21 18:57:24,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-08-21 18:57:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 314 transitions. [2020-08-21 18:57:24,386 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 314 transitions. Word has length 22 [2020-08-21 18:57:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,387 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 314 transitions. [2020-08-21 18:57:24,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 314 transitions. [2020-08-21 18:57:24,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 18:57:24,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,392 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 18:57:24,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 18:57:24,392 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,394 INFO L82 PathProgramCache]: Analyzing trace with hash 321786602, now seen corresponding path program 1 times [2020-08-21 18:57:24,394 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687469278] [2020-08-21 18:57:24,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,450 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 18:57:24,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687469278] [2020-08-21 18:57:24,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286686326] [2020-08-21 18:57:24,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,453 INFO L87 Difference]: Start difference. First operand 184 states and 314 transitions. Second operand 3 states. [2020-08-21 18:57:24,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,487 INFO L93 Difference]: Finished difference Result 432 states and 744 transitions. [2020-08-21 18:57:24,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,487 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-21 18:57:24,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,489 INFO L225 Difference]: With dead ends: 432 [2020-08-21 18:57:24,489 INFO L226 Difference]: Without dead ends: 258 [2020-08-21 18:57:24,491 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 18:57:24,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-08-21 18:57:24,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 256. [2020-08-21 18:57:24,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 256 states. [2020-08-21 18:57:24,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 434 transitions. [2020-08-21 18:57:24,507 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 434 transitions. Word has length 22 [2020-08-21 18:57:24,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,507 INFO L479 AbstractCegarLoop]: Abstraction has 256 states and 434 transitions. [2020-08-21 18:57:24,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,508 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 434 transitions. [2020-08-21 18:57:24,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:24,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,510 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 18:57:24,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 18:57:24,510 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1898185914, now seen corresponding path program 1 times [2020-08-21 18:57:24,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548179480] [2020-08-21 18:57:24,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,544 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 18:57:24,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548179480] [2020-08-21 18:57:24,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513909706] [2020-08-21 18:57:24,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,546 INFO L87 Difference]: Start difference. First operand 256 states and 434 transitions. Second operand 3 states. [2020-08-21 18:57:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,566 INFO L93 Difference]: Finished difference Result 384 states and 648 transitions. [2020-08-21 18:57:24,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,566 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:24,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,568 INFO L225 Difference]: With dead ends: 384 [2020-08-21 18:57:24,569 INFO L226 Difference]: Without dead ends: 262 [2020-08-21 18:57:24,570 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 18:57:24,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-08-21 18:57:24,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 260. [2020-08-21 18:57:24,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-08-21 18:57:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 434 transitions. [2020-08-21 18:57:24,583 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 434 transitions. Word has length 23 [2020-08-21 18:57:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,584 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 434 transitions. [2020-08-21 18:57:24,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,584 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 434 transitions. [2020-08-21 18:57:24,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:24,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,586 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 18:57:24,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 18:57:24,586 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1385664132, now seen corresponding path program 1 times [2020-08-21 18:57:24,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137798174] [2020-08-21 18:57:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,615 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 18:57:24,615 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137798174] [2020-08-21 18:57:24,615 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,616 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201011722] [2020-08-21 18:57:24,616 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,617 INFO L87 Difference]: Start difference. First operand 260 states and 434 transitions. Second operand 3 states. [2020-08-21 18:57:24,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,641 INFO L93 Difference]: Finished difference Result 476 states and 808 transitions. [2020-08-21 18:57:24,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,642 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:24,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,645 INFO L225 Difference]: With dead ends: 476 [2020-08-21 18:57:24,645 INFO L226 Difference]: Without dead ends: 474 [2020-08-21 18:57:24,646 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 18:57:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-08-21 18:57:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 360. [2020-08-21 18:57:24,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 360 states. [2020-08-21 18:57:24,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 590 transitions. [2020-08-21 18:57:24,660 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 590 transitions. Word has length 23 [2020-08-21 18:57:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,661 INFO L479 AbstractCegarLoop]: Abstraction has 360 states and 590 transitions. [2020-08-21 18:57:24,661 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,661 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 590 transitions. [2020-08-21 18:57:24,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-21 18:57:24,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,663 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 18:57:24,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 18:57:24,663 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 798858118, now seen corresponding path program 1 times [2020-08-21 18:57:24,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105819885] [2020-08-21 18:57:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,687 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 18:57:24,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105819885] [2020-08-21 18:57:24,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820613714] [2020-08-21 18:57:24,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,690 INFO L87 Difference]: Start difference. First operand 360 states and 590 transitions. Second operand 3 states. [2020-08-21 18:57:24,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,717 INFO L93 Difference]: Finished difference Result 844 states and 1392 transitions. [2020-08-21 18:57:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,717 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-21 18:57:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,721 INFO L225 Difference]: With dead ends: 844 [2020-08-21 18:57:24,721 INFO L226 Difference]: Without dead ends: 498 [2020-08-21 18:57:24,723 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 18:57:24,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-08-21 18:57:24,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 496. [2020-08-21 18:57:24,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 496 states. [2020-08-21 18:57:24,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 806 transitions. [2020-08-21 18:57:24,749 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 806 transitions. Word has length 23 [2020-08-21 18:57:24,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,750 INFO L479 AbstractCegarLoop]: Abstraction has 496 states and 806 transitions. [2020-08-21 18:57:24,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,750 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 806 transitions. [2020-08-21 18:57:24,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:24,754 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,754 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 18:57:24,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 18:57:24,755 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,755 INFO L82 PathProgramCache]: Analyzing trace with hash 6129535, now seen corresponding path program 1 times [2020-08-21 18:57:24,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [893613885] [2020-08-21 18:57:24,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,808 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 18:57:24,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [893613885] [2020-08-21 18:57:24,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387776304] [2020-08-21 18:57:24,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,814 INFO L87 Difference]: Start difference. First operand 496 states and 806 transitions. Second operand 3 states. [2020-08-21 18:57:24,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,850 INFO L93 Difference]: Finished difference Result 744 states and 1204 transitions. [2020-08-21 18:57:24,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,851 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:24,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,855 INFO L225 Difference]: With dead ends: 744 [2020-08-21 18:57:24,855 INFO L226 Difference]: Without dead ends: 506 [2020-08-21 18:57:24,856 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 18:57:24,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2020-08-21 18:57:24,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 504. [2020-08-21 18:57:24,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 504 states. [2020-08-21 18:57:24,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 806 transitions. [2020-08-21 18:57:24,875 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 806 transitions. Word has length 24 [2020-08-21 18:57:24,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,875 INFO L479 AbstractCegarLoop]: Abstraction has 504 states and 806 transitions. [2020-08-21 18:57:24,875 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,875 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 806 transitions. [2020-08-21 18:57:24,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:24,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,877 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 18:57:24,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 18:57:24,879 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1004987715, now seen corresponding path program 1 times [2020-08-21 18:57:24,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [238766010] [2020-08-21 18:57:24,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:24,913 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 18:57:24,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [238766010] [2020-08-21 18:57:24,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:24,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:24,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376539738] [2020-08-21 18:57:24,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:24,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:24,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:24,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:24,922 INFO L87 Difference]: Start difference. First operand 504 states and 806 transitions. Second operand 3 states. [2020-08-21 18:57:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:24,952 INFO L93 Difference]: Finished difference Result 908 states and 1480 transitions. [2020-08-21 18:57:24,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:24,955 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:24,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:24,960 INFO L225 Difference]: With dead ends: 908 [2020-08-21 18:57:24,960 INFO L226 Difference]: Without dead ends: 906 [2020-08-21 18:57:24,961 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 18:57:24,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2020-08-21 18:57:24,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 712. [2020-08-21 18:57:24,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 712 states. [2020-08-21 18:57:24,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 1110 transitions. [2020-08-21 18:57:24,985 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 1110 transitions. Word has length 24 [2020-08-21 18:57:24,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:24,987 INFO L479 AbstractCegarLoop]: Abstraction has 712 states and 1110 transitions. [2020-08-21 18:57:24,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:24,987 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 1110 transitions. [2020-08-21 18:57:24,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-21 18:57:24,989 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:24,989 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 18:57:24,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 18:57:24,989 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:24,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:24,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1591793729, now seen corresponding path program 1 times [2020-08-21 18:57:24,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:24,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345317762] [2020-08-21 18:57:24,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,031 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 18:57:25,031 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345317762] [2020-08-21 18:57:25,032 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,032 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,032 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694788498] [2020-08-21 18:57:25,033 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,034 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,034 INFO L87 Difference]: Start difference. First operand 712 states and 1110 transitions. Second operand 3 states. [2020-08-21 18:57:25,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,074 INFO L93 Difference]: Finished difference Result 1660 states and 2600 transitions. [2020-08-21 18:57:25,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,075 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-21 18:57:25,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,081 INFO L225 Difference]: With dead ends: 1660 [2020-08-21 18:57:25,082 INFO L226 Difference]: Without dead ends: 970 [2020-08-21 18:57:25,085 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 18:57:25,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 970 states. [2020-08-21 18:57:25,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 970 to 968. [2020-08-21 18:57:25,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 968 states. [2020-08-21 18:57:25,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 1494 transitions. [2020-08-21 18:57:25,122 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 1494 transitions. Word has length 24 [2020-08-21 18:57:25,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,122 INFO L479 AbstractCegarLoop]: Abstraction has 968 states and 1494 transitions. [2020-08-21 18:57:25,122 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 1494 transitions. [2020-08-21 18:57:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:25,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,125 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 18:57:25,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 18:57:25,125 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1089633349, now seen corresponding path program 1 times [2020-08-21 18:57:25,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067100254] [2020-08-21 18:57:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,162 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 18:57:25,162 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067100254] [2020-08-21 18:57:25,162 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435097135] [2020-08-21 18:57:25,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,165 INFO L87 Difference]: Start difference. First operand 968 states and 1494 transitions. Second operand 3 states. [2020-08-21 18:57:25,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,196 INFO L93 Difference]: Finished difference Result 1452 states and 2232 transitions. [2020-08-21 18:57:25,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,216 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:25,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,221 INFO L225 Difference]: With dead ends: 1452 [2020-08-21 18:57:25,221 INFO L226 Difference]: Without dead ends: 986 [2020-08-21 18:57:25,224 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 18:57:25,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 986 states. [2020-08-21 18:57:25,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 986 to 984. [2020-08-21 18:57:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 984 states. [2020-08-21 18:57:25,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 1494 transitions. [2020-08-21 18:57:25,253 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 1494 transitions. Word has length 25 [2020-08-21 18:57:25,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,255 INFO L479 AbstractCegarLoop]: Abstraction has 984 states and 1494 transitions. [2020-08-21 18:57:25,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,255 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 1494 transitions. [2020-08-21 18:57:25,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:25,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,258 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 18:57:25,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 18:57:25,259 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,259 INFO L82 PathProgramCache]: Analyzing trace with hash -2100750599, now seen corresponding path program 1 times [2020-08-21 18:57:25,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,260 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470567684] [2020-08-21 18:57:25,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,280 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 18:57:25,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470567684] [2020-08-21 18:57:25,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120154256] [2020-08-21 18:57:25,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,282 INFO L87 Difference]: Start difference. First operand 984 states and 1494 transitions. Second operand 3 states. [2020-08-21 18:57:25,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,313 INFO L93 Difference]: Finished difference Result 1740 states and 2696 transitions. [2020-08-21 18:57:25,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,314 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:25,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,322 INFO L225 Difference]: With dead ends: 1740 [2020-08-21 18:57:25,322 INFO L226 Difference]: Without dead ends: 1738 [2020-08-21 18:57:25,323 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 18:57:25,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1738 states. [2020-08-21 18:57:25,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1738 to 1416. [2020-08-21 18:57:25,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1416 states. [2020-08-21 18:57:25,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1416 states to 1416 states and 2086 transitions. [2020-08-21 18:57:25,364 INFO L78 Accepts]: Start accepts. Automaton has 1416 states and 2086 transitions. Word has length 25 [2020-08-21 18:57:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,364 INFO L479 AbstractCegarLoop]: Abstraction has 1416 states and 2086 transitions. [2020-08-21 18:57:25,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,365 INFO L276 IsEmpty]: Start isEmpty. Operand 1416 states and 2086 transitions. [2020-08-21 18:57:25,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-21 18:57:25,367 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,367 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 18:57:25,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 18:57:25,368 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1607410683, now seen corresponding path program 1 times [2020-08-21 18:57:25,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [23368240] [2020-08-21 18:57:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,388 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 18:57:25,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [23368240] [2020-08-21 18:57:25,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609556426] [2020-08-21 18:57:25,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,390 INFO L87 Difference]: Start difference. First operand 1416 states and 2086 transitions. Second operand 3 states. [2020-08-21 18:57:25,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,436 INFO L93 Difference]: Finished difference Result 3276 states and 4840 transitions. [2020-08-21 18:57:25,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,437 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-21 18:57:25,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,445 INFO L225 Difference]: With dead ends: 3276 [2020-08-21 18:57:25,446 INFO L226 Difference]: Without dead ends: 1898 [2020-08-21 18:57:25,449 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 18:57:25,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1898 states. [2020-08-21 18:57:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1898 to 1896. [2020-08-21 18:57:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1896 states. [2020-08-21 18:57:25,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1896 states to 1896 states and 2758 transitions. [2020-08-21 18:57:25,504 INFO L78 Accepts]: Start accepts. Automaton has 1896 states and 2758 transitions. Word has length 25 [2020-08-21 18:57:25,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,504 INFO L479 AbstractCegarLoop]: Abstraction has 1896 states and 2758 transitions. [2020-08-21 18:57:25,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,505 INFO L276 IsEmpty]: Start isEmpty. Operand 1896 states and 2758 transitions. [2020-08-21 18:57:25,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:25,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,508 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 18:57:25,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 18:57:25,508 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,508 INFO L82 PathProgramCache]: Analyzing trace with hash -698544044, now seen corresponding path program 1 times [2020-08-21 18:57:25,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757152917] [2020-08-21 18:57:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,527 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 18:57:25,528 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757152917] [2020-08-21 18:57:25,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,528 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352437] [2020-08-21 18:57:25,529 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,529 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,529 INFO L87 Difference]: Start difference. First operand 1896 states and 2758 transitions. Second operand 3 states. [2020-08-21 18:57:25,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,574 INFO L93 Difference]: Finished difference Result 2844 states and 4120 transitions. [2020-08-21 18:57:25,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,575 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:25,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,584 INFO L225 Difference]: With dead ends: 2844 [2020-08-21 18:57:25,584 INFO L226 Difference]: Without dead ends: 1930 [2020-08-21 18:57:25,587 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 18:57:25,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1930 states. [2020-08-21 18:57:25,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1930 to 1928. [2020-08-21 18:57:25,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1928 states. [2020-08-21 18:57:25,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1928 states to 1928 states and 2758 transitions. [2020-08-21 18:57:25,661 INFO L78 Accepts]: Start accepts. Automaton has 1928 states and 2758 transitions. Word has length 26 [2020-08-21 18:57:25,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,662 INFO L479 AbstractCegarLoop]: Abstraction has 1928 states and 2758 transitions. [2020-08-21 18:57:25,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,662 INFO L276 IsEmpty]: Start isEmpty. Operand 1928 states and 2758 transitions. [2020-08-21 18:57:25,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:25,666 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,667 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 18:57:25,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 18:57:25,667 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash -1709661294, now seen corresponding path program 1 times [2020-08-21 18:57:25,668 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683730987] [2020-08-21 18:57:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,692 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 18:57:25,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683730987] [2020-08-21 18:57:25,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228215844] [2020-08-21 18:57:25,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,695 INFO L87 Difference]: Start difference. First operand 1928 states and 2758 transitions. Second operand 3 states. [2020-08-21 18:57:25,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:25,787 INFO L93 Difference]: Finished difference Result 3340 states and 4872 transitions. [2020-08-21 18:57:25,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:25,788 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:25,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:25,807 INFO L225 Difference]: With dead ends: 3340 [2020-08-21 18:57:25,807 INFO L226 Difference]: Without dead ends: 3338 [2020-08-21 18:57:25,808 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 18:57:25,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3338 states. [2020-08-21 18:57:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3338 to 2824. [2020-08-21 18:57:25,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2824 states. [2020-08-21 18:57:25,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2824 states to 2824 states and 3910 transitions. [2020-08-21 18:57:25,914 INFO L78 Accepts]: Start accepts. Automaton has 2824 states and 3910 transitions. Word has length 26 [2020-08-21 18:57:25,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:25,915 INFO L479 AbstractCegarLoop]: Abstraction has 2824 states and 3910 transitions. [2020-08-21 18:57:25,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:25,915 INFO L276 IsEmpty]: Start isEmpty. Operand 2824 states and 3910 transitions. [2020-08-21 18:57:25,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-21 18:57:25,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:25,922 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 18:57:25,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 18:57:25,923 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:25,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:25,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1998499988, now seen corresponding path program 1 times [2020-08-21 18:57:25,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:25,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608934328] [2020-08-21 18:57:25,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:25,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:25,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:25,947 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 18:57:25,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608934328] [2020-08-21 18:57:25,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:25,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:25,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954685591] [2020-08-21 18:57:25,948 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:25,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:25,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:25,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:25,949 INFO L87 Difference]: Start difference. First operand 2824 states and 3910 transitions. Second operand 3 states. [2020-08-21 18:57:26,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,025 INFO L93 Difference]: Finished difference Result 6476 states and 8968 transitions. [2020-08-21 18:57:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 26 [2020-08-21 18:57:26,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,044 INFO L225 Difference]: With dead ends: 6476 [2020-08-21 18:57:26,045 INFO L226 Difference]: Without dead ends: 3722 [2020-08-21 18:57:26,051 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 18:57:26,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3722 states. [2020-08-21 18:57:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3722 to 3720. [2020-08-21 18:57:26,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3720 states. [2020-08-21 18:57:26,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3720 states to 3720 states and 5062 transitions. [2020-08-21 18:57:26,153 INFO L78 Accepts]: Start accepts. Automaton has 3720 states and 5062 transitions. Word has length 26 [2020-08-21 18:57:26,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,153 INFO L479 AbstractCegarLoop]: Abstraction has 3720 states and 5062 transitions. [2020-08-21 18:57:26,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3720 states and 5062 transitions. [2020-08-21 18:57:26,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:26,159 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,159 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 18:57:26,159 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 18:57:26,159 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1459677136, now seen corresponding path program 1 times [2020-08-21 18:57:26,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1434527055] [2020-08-21 18:57:26,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,181 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 18:57:26,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1434527055] [2020-08-21 18:57:26,181 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261095408] [2020-08-21 18:57:26,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,183 INFO L87 Difference]: Start difference. First operand 3720 states and 5062 transitions. Second operand 3 states. [2020-08-21 18:57:26,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,281 INFO L93 Difference]: Finished difference Result 5580 states and 7560 transitions. [2020-08-21 18:57:26,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,282 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:26,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,299 INFO L225 Difference]: With dead ends: 5580 [2020-08-21 18:57:26,300 INFO L226 Difference]: Without dead ends: 3786 [2020-08-21 18:57:26,304 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 18:57:26,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3786 states. [2020-08-21 18:57:26,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3786 to 3784. [2020-08-21 18:57:26,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3784 states. [2020-08-21 18:57:26,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 5062 transitions. [2020-08-21 18:57:26,431 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 5062 transitions. Word has length 27 [2020-08-21 18:57:26,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,431 INFO L479 AbstractCegarLoop]: Abstraction has 3784 states and 5062 transitions. [2020-08-21 18:57:26,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,432 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 5062 transitions. [2020-08-21 18:57:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:26,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,437 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 18:57:26,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 18:57:26,438 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1824172910, now seen corresponding path program 1 times [2020-08-21 18:57:26,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793980951] [2020-08-21 18:57:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:26,471 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 18:57:26,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793980951] [2020-08-21 18:57:26,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:26,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:26,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082217007] [2020-08-21 18:57:26,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:26,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:26,473 INFO L87 Difference]: Start difference. First operand 3784 states and 5062 transitions. Second operand 3 states. [2020-08-21 18:57:26,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:26,617 INFO L93 Difference]: Finished difference Result 10956 states and 14408 transitions. [2020-08-21 18:57:26,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:26,618 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:26,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:26,668 INFO L225 Difference]: With dead ends: 10956 [2020-08-21 18:57:26,668 INFO L226 Difference]: Without dead ends: 7306 [2020-08-21 18:57:26,680 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 18:57:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7306 states. [2020-08-21 18:57:26,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7306 to 7304. [2020-08-21 18:57:26,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 18:57:26,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9350 transitions. [2020-08-21 18:57:26,970 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9350 transitions. Word has length 27 [2020-08-21 18:57:26,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:26,971 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9350 transitions. [2020-08-21 18:57:26,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:26,971 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9350 transitions. [2020-08-21 18:57:26,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-08-21 18:57:26,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:26,985 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 18:57:26,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 18:57:26,986 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:26,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:26,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1883988372, now seen corresponding path program 1 times [2020-08-21 18:57:26,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:26,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746274711] [2020-08-21 18:57:26,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,013 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 18:57:27,013 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746274711] [2020-08-21 18:57:27,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,014 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223801256] [2020-08-21 18:57:27,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,015 INFO L87 Difference]: Start difference. First operand 7304 states and 9350 transitions. Second operand 3 states. [2020-08-21 18:57:27,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,202 INFO L93 Difference]: Finished difference Result 8076 states and 10632 transitions. [2020-08-21 18:57:27,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,203 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 27 [2020-08-21 18:57:27,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,221 INFO L225 Difference]: With dead ends: 8076 [2020-08-21 18:57:27,221 INFO L226 Difference]: Without dead ends: 8074 [2020-08-21 18:57:27,224 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 18:57:27,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8074 states. [2020-08-21 18:57:27,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8074 to 7304. [2020-08-21 18:57:27,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7304 states. [2020-08-21 18:57:27,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7304 states to 7304 states and 9222 transitions. [2020-08-21 18:57:27,420 INFO L78 Accepts]: Start accepts. Automaton has 7304 states and 9222 transitions. Word has length 27 [2020-08-21 18:57:27,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,420 INFO L479 AbstractCegarLoop]: Abstraction has 7304 states and 9222 transitions. [2020-08-21 18:57:27,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,421 INFO L276 IsEmpty]: Start isEmpty. Operand 7304 states and 9222 transitions. [2020-08-21 18:57:27,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:27,431 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 18:57:27,431 INFO L427 AbstractCegarLoop]: === Iteration 24 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,432 INFO L82 PathProgramCache]: Analyzing trace with hash 715001129, now seen corresponding path program 1 times [2020-08-21 18:57:27,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956149473] [2020-08-21 18:57:27,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:27,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:27,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:27,461 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 18:57:27,462 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956149473] [2020-08-21 18:57:27,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:27,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:27,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287837762] [2020-08-21 18:57:27,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:27,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:27,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:27,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:27,463 INFO L87 Difference]: Start difference. First operand 7304 states and 9222 transitions. Second operand 3 states. [2020-08-21 18:57:27,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:27,677 INFO L93 Difference]: Finished difference Result 12172 states and 15496 transitions. [2020-08-21 18:57:27,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:27,677 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 18:57:27,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:27,699 INFO L225 Difference]: With dead ends: 12172 [2020-08-21 18:57:27,700 INFO L226 Difference]: Without dead ends: 12170 [2020-08-21 18:57:27,702 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 18:57:27,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12170 states. [2020-08-21 18:57:27,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12170 to 11144. [2020-08-21 18:57:27,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11144 states. [2020-08-21 18:57:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11144 states to 11144 states and 13702 transitions. [2020-08-21 18:57:27,971 INFO L78 Accepts]: Start accepts. Automaton has 11144 states and 13702 transitions. Word has length 28 [2020-08-21 18:57:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:27,972 INFO L479 AbstractCegarLoop]: Abstraction has 11144 states and 13702 transitions. [2020-08-21 18:57:27,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 11144 states and 13702 transitions. [2020-08-21 18:57:27,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-21 18:57:27,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:27,994 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:27,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 18:57:27,994 INFO L427 AbstractCegarLoop]: === Iteration 25 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:27,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:27,995 INFO L82 PathProgramCache]: Analyzing trace with hash 128195115, now seen corresponding path program 1 times [2020-08-21 18:57:27,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:27,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625500794] [2020-08-21 18:57:27,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,015 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 18:57:28,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625500794] [2020-08-21 18:57:28,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121472321] [2020-08-21 18:57:28,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,017 INFO L87 Difference]: Start difference. First operand 11144 states and 13702 transitions. Second operand 3 states. [2020-08-21 18:57:28,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:28,241 INFO L93 Difference]: Finished difference Result 25228 states and 30856 transitions. [2020-08-21 18:57:28,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:28,242 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 28 [2020-08-21 18:57:28,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:28,270 INFO L225 Difference]: With dead ends: 25228 [2020-08-21 18:57:28,270 INFO L226 Difference]: Without dead ends: 14218 [2020-08-21 18:57:28,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14218 states. [2020-08-21 18:57:28,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14218 to 14216. [2020-08-21 18:57:28,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14216 states. [2020-08-21 18:57:28,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14216 states to 14216 states and 16902 transitions. [2020-08-21 18:57:28,696 INFO L78 Accepts]: Start accepts. Automaton has 14216 states and 16902 transitions. Word has length 28 [2020-08-21 18:57:28,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:28,696 INFO L479 AbstractCegarLoop]: Abstraction has 14216 states and 16902 transitions. [2020-08-21 18:57:28,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:28,696 INFO L276 IsEmpty]: Start isEmpty. Operand 14216 states and 16902 transitions. [2020-08-21 18:57:28,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:57:28,715 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:28,715 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:28,715 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 18:57:28,715 INFO L427 AbstractCegarLoop]: === Iteration 26 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:28,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:28,716 INFO L82 PathProgramCache]: Analyzing trace with hash 690414627, now seen corresponding path program 1 times [2020-08-21 18:57:28,716 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:28,716 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839181360] [2020-08-21 18:57:28,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:28,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:28,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:28,738 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 18:57:28,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839181360] [2020-08-21 18:57:28,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:28,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:28,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024992928] [2020-08-21 18:57:28,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:28,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:28,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:28,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:28,740 INFO L87 Difference]: Start difference. First operand 14216 states and 16902 transitions. Second operand 3 states. [2020-08-21 18:57:29,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:29,026 INFO L93 Difference]: Finished difference Result 21516 states and 25608 transitions. [2020-08-21 18:57:29,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:29,026 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 18:57:29,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:29,050 INFO L225 Difference]: With dead ends: 21516 [2020-08-21 18:57:29,050 INFO L226 Difference]: Without dead ends: 14602 [2020-08-21 18:57:29,064 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 18:57:29,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14602 states. [2020-08-21 18:57:29,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14602 to 14600. [2020-08-21 18:57:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14600 states. [2020-08-21 18:57:29,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14600 states to 14600 states and 17158 transitions. [2020-08-21 18:57:29,355 INFO L78 Accepts]: Start accepts. Automaton has 14600 states and 17158 transitions. Word has length 29 [2020-08-21 18:57:29,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:29,355 INFO L479 AbstractCegarLoop]: Abstraction has 14600 states and 17158 transitions. [2020-08-21 18:57:29,355 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:29,355 INFO L276 IsEmpty]: Start isEmpty. Operand 14600 states and 17158 transitions. [2020-08-21 18:57:29,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:57:29,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:29,373 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:29,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 18:57:29,373 INFO L427 AbstractCegarLoop]: === Iteration 27 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:29,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:29,374 INFO L82 PathProgramCache]: Analyzing trace with hash -320702623, now seen corresponding path program 1 times [2020-08-21 18:57:29,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:29,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1080474257] [2020-08-21 18:57:29,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:29,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:29,395 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 18:57:29,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1080474257] [2020-08-21 18:57:29,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:29,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:29,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059237933] [2020-08-21 18:57:29,396 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:29,396 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:29,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:29,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:29,397 INFO L87 Difference]: Start difference. First operand 14600 states and 17158 transitions. Second operand 3 states. [2020-08-21 18:57:30,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:30,201 INFO L93 Difference]: Finished difference Result 23562 states and 27399 transitions. [2020-08-21 18:57:30,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:30,202 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 18:57:30,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:30,241 INFO L225 Difference]: With dead ends: 23562 [2020-08-21 18:57:30,241 INFO L226 Difference]: Without dead ends: 23560 [2020-08-21 18:57:30,246 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 18:57:30,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23560 states. [2020-08-21 18:57:30,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23560 to 22536. [2020-08-21 18:57:30,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22536 states. [2020-08-21 18:57:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22536 states to 22536 states and 25862 transitions. [2020-08-21 18:57:30,645 INFO L78 Accepts]: Start accepts. Automaton has 22536 states and 25862 transitions. Word has length 29 [2020-08-21 18:57:30,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:30,645 INFO L479 AbstractCegarLoop]: Abstraction has 22536 states and 25862 transitions. [2020-08-21 18:57:30,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 22536 states and 25862 transitions. [2020-08-21 18:57:30,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-08-21 18:57:30,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 18:57:30,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 18:57:30,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 18:57:30,681 INFO L427 AbstractCegarLoop]: === Iteration 28 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 18:57:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 18:57:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash -907508637, now seen corresponding path program 1 times [2020-08-21 18:57:30,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 18:57:30,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204539994] [2020-08-21 18:57:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 18:57:30,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:30,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 18:57:30,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 18:57:30,709 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 18:57:30,710 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204539994] [2020-08-21 18:57:30,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 18:57:30,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-21 18:57:30,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169766888] [2020-08-21 18:57:30,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-21 18:57:30,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 18:57:30,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-21 18:57:30,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-21 18:57:30,711 INFO L87 Difference]: Start difference. First operand 22536 states and 25862 transitions. Second operand 3 states. [2020-08-21 18:57:31,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 18:57:31,144 INFO L93 Difference]: Finished difference Result 50184 states and 56582 transitions. [2020-08-21 18:57:31,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-21 18:57:31,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-08-21 18:57:31,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 18:57:31,145 INFO L225 Difference]: With dead ends: 50184 [2020-08-21 18:57:31,145 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 18:57:31,224 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 18:57:31,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 18:57:31,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 18:57:31,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 18:57:31,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 18:57:31,226 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-08-21 18:57:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 18:57:31,226 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 18:57:31,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-21 18:57:31,226 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 18:57:31,226 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 18:57:31,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 18:57:31,229 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 18:57:31,260 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-21 18:57:31,261 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:31,261 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 18:57:31,261 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 18:57:31,261 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 18:57:31,261 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 18:57:31,261 INFO L271 CegarLoopResult]: At program point L159(lines 5 163) the Hoare annotation is: true [2020-08-21 18:57:31,261 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 163) no Hoare annotation was computed. [2020-08-21 18:57:31,261 INFO L268 CegarLoopResult]: For program point L118-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,262 INFO L268 CegarLoopResult]: For program point L143-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,263 INFO L268 CegarLoopResult]: For program point L102-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,263 INFO L268 CegarLoopResult]: For program point L94-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,263 INFO L268 CegarLoopResult]: For program point L119(line 119) no Hoare annotation was computed. [2020-08-21 18:57:31,263 INFO L268 CegarLoopResult]: For program point L86-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,263 INFO L268 CegarLoopResult]: For program point L144(line 144) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point L78-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point L70-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point L128-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L271 CegarLoopResult]: At program point L153-1(lines 39 158) the Hoare annotation is: true [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 163) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point L129(line 129) no Hoare annotation was computed. [2020-08-21 18:57:31,264 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 161) no Hoare annotation was computed. [2020-08-21 18:57:31,265 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 163) the Hoare annotation is: true [2020-08-21 18:57:31,266 INFO L268 CegarLoopResult]: For program point L154(line 154) no Hoare annotation was computed. [2020-08-21 18:57:31,266 INFO L264 CegarLoopResult]: At program point L154-1(lines 5 163) the Hoare annotation is: false [2020-08-21 18:57:31,266 INFO L268 CegarLoopResult]: For program point L113-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,266 INFO L268 CegarLoopResult]: For program point L138-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L114(line 114) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L139(line 139) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L98-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L123-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L90-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L148-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L82-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L41(lines 41 43) no Hoare annotation was computed. [2020-08-21 18:57:31,267 INFO L268 CegarLoopResult]: For program point L74-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L66(lines 66 68) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L66-2(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L124(line 124) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L149(line 149) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L108-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L133-1(lines 39 158) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L109(line 109) no Hoare annotation was computed. [2020-08-21 18:57:31,268 INFO L268 CegarLoopResult]: For program point L134(line 134) no Hoare annotation was computed. [2020-08-21 18:57:31,292 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:57:31 BoogieIcfgContainer [2020-08-21 18:57:31,292 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 18:57:31,296 INFO L168 Benchmark]: Toolchain (without parser) took 9004.92 ms. Allocated memory was 140.0 MB in the beginning and 615.5 MB in the end (delta: 475.5 MB). Free memory was 103.1 MB in the beginning and 355.5 MB in the end (delta: -252.4 MB). Peak memory consumption was 223.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:31,299 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 18:57:31,300 INFO L168 Benchmark]: CACSL2BoogieTranslator took 349.01 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 91.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:31,304 INFO L168 Benchmark]: Boogie Preprocessor took 142.00 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:31,305 INFO L168 Benchmark]: RCFGBuilder took 371.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 160.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:31,305 INFO L168 Benchmark]: TraceAbstraction took 8133.11 ms. Allocated memory was 202.4 MB in the beginning and 615.5 MB in the end (delta: 413.1 MB). Free memory was 160.3 MB in the beginning and 355.5 MB in the end (delta: -195.2 MB). Peak memory consumption was 217.9 MB. Max. memory is 7.1 GB. [2020-08-21 18:57:31,309 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 349.01 ms. Allocated memory is still 140.0 MB. Free memory was 102.9 MB in the beginning and 91.7 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 142.00 ms. Allocated memory was 140.0 MB in the beginning and 202.4 MB in the end (delta: 62.4 MB). Free memory was 91.7 MB in the beginning and 180.4 MB in the end (delta: -88.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 7.1 GB. * RCFGBuilder took 371.35 ms. Allocated memory is still 202.4 MB. Free memory was 180.4 MB in the beginning and 160.9 MB in the end (delta: 19.5 MB). Peak memory consumption was 19.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 8133.11 ms. Allocated memory was 202.4 MB in the beginning and 615.5 MB in the end (delta: 413.1 MB). Free memory was 160.3 MB in the beginning and 355.5 MB in the end (delta: -195.2 MB). Peak memory consumption was 217.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 161]: 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: 39]: Loop Invariant Derived loop invariant: 1 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 5]: Loop Invariant Derived loop invariant: 1 - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 7.9s, OverallIterations: 28, TraceHistogramMax: 1, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 2384 SDtfs, 1153 SDslu, 1624 SDs, 0 SdLazy, 149 SolverSat, 28 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 140 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=22536occurred in iteration=27, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 2.5s AutomataMinimizationTime, 28 MinimizatonAttempts, 4124 StatesRemovedByMinimization, 27 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 1034 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.6s InterpolantComputationTime, 687 NumberOfCodeBlocks, 687 NumberOfCodeBlocksAsserted, 28 NumberOfCheckSat, 659 ConstructedInterpolants, 0 QuantifiedInterpolants, 31265 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 28 InterpolantComputations, 28 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...