/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.2 --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_8.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 03:51:28,425 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 03:51:28,428 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 03:51:28,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 03:51:28,466 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 03:51:28,474 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 03:51:28,476 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 03:51:28,480 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 03:51:28,482 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 03:51:28,487 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 03:51:28,488 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 03:51:28,489 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 03:51:28,489 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 03:51:28,492 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 03:51:28,495 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 03:51:28,496 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 03:51:28,498 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 03:51:28,499 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 03:51:28,500 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 03:51:28,508 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 03:51:28,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 03:51:28,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 03:51:28,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 03:51:28,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 03:51:28,525 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-22 03:51:28,525 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-22 03:51:28,525 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-22 03:51:28,526 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-22 03:51:28,527 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-22 03:51:28,527 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-22 03:51:28,534 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 03:51:28,535 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 03:51:28,536 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 03:51:28,537 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 [2020-08-22 03:51:28,580 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 03:51:28,580 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 03:51:28,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 03:51:28,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 03:51:28,582 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 03:51:28,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 03:51:28,583 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 03:51:28,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 03:51:28,583 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 03:51:28,583 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 03:51:28,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 03:51:28,588 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 03:51:28,588 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 03:51:28,588 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 03:51:28,589 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 03:51:28,589 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 03:51:28,589 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 03:51:28,589 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 03:51:28,589 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 03:51:28,590 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 03:51:28,590 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 03:51:28,590 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 03:51:28,590 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 03:51:28,590 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 03:51:28,591 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 03:51:28,591 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 03:51:28,591 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 03:51:28,591 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 03:51:28,591 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 03:51:28,592 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=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.2;log-additional-information=true; [2020-08-22 03:51:28,887 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 03:51:28,906 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 03:51:28,910 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 03:51:28,912 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 03:51:28,913 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 03:51:28,913 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 03:51:29,001 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8841ca8d4/281c0322ab3447c7bc55e349acd65ed8/FLAG09b00b868 [2020-08-22 03:51:29,445 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 03:51:29,446 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_8.c [2020-08-22 03:51:29,455 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8841ca8d4/281c0322ab3447c7bc55e349acd65ed8/FLAG09b00b868 [2020-08-22 03:51:29,836 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/8841ca8d4/281c0322ab3447c7bc55e349acd65ed8 [2020-08-22 03:51:29,845 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 03:51:29,847 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 03:51:29,849 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:29,849 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 03:51:29,852 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 03:51:29,853 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:29" (1/1) ... [2020-08-22 03:51:29,858 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e979d3d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:29, skipping insertion in model container [2020-08-22 03:51:29,858 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 03:51:29" (1/1) ... [2020-08-22 03:51:29,866 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 03:51:29,891 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 03:51:30,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:30,065 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 03:51:30,093 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 03:51:30,108 INFO L208 MainTranslator]: Completed translation [2020-08-22 03:51:30,108 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30 WrapperNode [2020-08-22 03:51:30,109 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 03:51:30,109 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 03:51:30,110 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 03:51:30,110 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 03:51:30,123 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,123 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,129 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,130 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,212 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,219 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,221 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (1/1) ... [2020-08-22 03:51:30,223 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 03:51:30,223 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 03:51:30,223 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 03:51:30,224 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 03:51:30,224 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (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 [2020-08-22 03:51:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 03:51:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 03:51:30,284 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 03:51:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 03:51:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 03:51:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 03:51:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 03:51:30,285 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 03:51:30,547 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 03:51:30,548 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-08-22 03:51:30,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:30 BoogieIcfgContainer [2020-08-22 03:51:30,552 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 03:51:30,554 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 03:51:30,554 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 03:51:30,557 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 03:51:30,558 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 03:51:29" (1/3) ... [2020-08-22 03:51:30,558 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4590ab27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:30, skipping insertion in model container [2020-08-22 03:51:30,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 03:51:30" (2/3) ... [2020-08-22 03:51:30,559 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4590ab27 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 03:51:30, skipping insertion in model container [2020-08-22 03:51:30,559 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 03:51:30" (3/3) ... [2020-08-22 03:51:30,561 INFO L109 eAbstractionObserver]: Analyzing ICFG test_locks_8.c [2020-08-22 03:51:30,574 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 03:51:30,585 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 03:51:30,603 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 03:51:30,633 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 03:51:30,633 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 03:51:30,634 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 03:51:30,634 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 03:51:30,634 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 03:51:30,634 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 03:51:30,634 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 03:51:30,634 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 03:51:30,657 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-08-22 03:51:30,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:30,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:30,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:30,667 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:30,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:30,675 INFO L82 PathProgramCache]: Analyzing trace with hash 577441593, now seen corresponding path program 1 times [2020-08-22 03:51:30,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:30,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058541527] [2020-08-22 03:51:30,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:30,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:30,894 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058541527] [2020-08-22 03:51:30,896 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:30,896 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:30,897 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88351995] [2020-08-22 03:51:30,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:30,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:30,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:30,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:30,920 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-08-22 03:51:31,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,008 INFO L93 Difference]: Finished difference Result 75 states and 126 transitions. [2020-08-22 03:51:31,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:31,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,028 INFO L225 Difference]: With dead ends: 75 [2020-08-22 03:51:31,029 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:51:31,039 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 [2020-08-22 03:51:31,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:51:31,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 42. [2020-08-22 03:51:31,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-08-22 03:51:31,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 73 transitions. [2020-08-22 03:51:31,083 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 73 transitions. Word has length 18 [2020-08-22 03:51:31,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,084 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 73 transitions. [2020-08-22 03:51:31,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,084 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 73 transitions. [2020-08-22 03:51:31,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 03:51:31,086 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,086 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,086 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 03:51:31,087 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,087 INFO L82 PathProgramCache]: Analyzing trace with hash 1278506171, now seen corresponding path program 1 times [2020-08-22 03:51:31,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,088 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2109422647] [2020-08-22 03:51:31,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2109422647] [2020-08-22 03:51:31,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285657356] [2020-08-22 03:51:31,160 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,160 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,161 INFO L87 Difference]: Start difference. First operand 42 states and 73 transitions. Second operand 3 states. [2020-08-22 03:51:31,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,187 INFO L93 Difference]: Finished difference Result 97 states and 172 transitions. [2020-08-22 03:51:31,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,188 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 18 [2020-08-22 03:51:31,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,189 INFO L225 Difference]: With dead ends: 97 [2020-08-22 03:51:31,190 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 03:51:31,191 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 [2020-08-22 03:51:31,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 03:51:31,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 58. [2020-08-22 03:51:31,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-08-22 03:51:31,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 101 transitions. [2020-08-22 03:51:31,202 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 101 transitions. Word has length 18 [2020-08-22 03:51:31,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,202 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 101 transitions. [2020-08-22 03:51:31,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 101 transitions. [2020-08-22 03:51:31,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:31,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 03:51:31,205 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,205 INFO L82 PathProgramCache]: Analyzing trace with hash 721034227, now seen corresponding path program 1 times [2020-08-22 03:51:31,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954887318] [2020-08-22 03:51:31,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954887318] [2020-08-22 03:51:31,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025963145] [2020-08-22 03:51:31,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,256 INFO L87 Difference]: Start difference. First operand 58 states and 101 transitions. Second operand 3 states. [2020-08-22 03:51:31,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,278 INFO L93 Difference]: Finished difference Result 90 states and 153 transitions. [2020-08-22 03:51:31,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,279 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:31,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,281 INFO L225 Difference]: With dead ends: 90 [2020-08-22 03:51:31,281 INFO L226 Difference]: Without dead ends: 63 [2020-08-22 03:51:31,282 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 [2020-08-22 03:51:31,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-08-22 03:51:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 61. [2020-08-22 03:51:31,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 03:51:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 103 transitions. [2020-08-22 03:51:31,293 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 103 transitions. Word has length 19 [2020-08-22 03:51:31,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,293 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 103 transitions. [2020-08-22 03:51:31,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 103 transitions. [2020-08-22 03:51:31,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:31,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,295 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 03:51:31,296 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,296 INFO L82 PathProgramCache]: Analyzing trace with hash 979199665, now seen corresponding path program 1 times [2020-08-22 03:51:31,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419481296] [2020-08-22 03:51:31,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419481296] [2020-08-22 03:51:31,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187412295] [2020-08-22 03:51:31,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,368 INFO L87 Difference]: Start difference. First operand 61 states and 103 transitions. Second operand 3 states. [2020-08-22 03:51:31,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,391 INFO L93 Difference]: Finished difference Result 112 states and 192 transitions. [2020-08-22 03:51:31,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,392 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:31,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,393 INFO L225 Difference]: With dead ends: 112 [2020-08-22 03:51:31,394 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 03:51:31,394 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 [2020-08-22 03:51:31,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 03:51:31,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 80. [2020-08-22 03:51:31,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-08-22 03:51:31,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 136 transitions. [2020-08-22 03:51:31,413 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 136 transitions. Word has length 19 [2020-08-22 03:51:31,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,414 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 136 transitions. [2020-08-22 03:51:31,414 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,414 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 136 transitions. [2020-08-22 03:51:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-08-22 03:51:31,417 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,417 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:31,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 03:51:31,417 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1680264243, now seen corresponding path program 1 times [2020-08-22 03:51:31,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079136148] [2020-08-22 03:51:31,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079136148] [2020-08-22 03:51:31,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822381074] [2020-08-22 03:51:31,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,496 INFO L87 Difference]: Start difference. First operand 80 states and 136 transitions. Second operand 3 states. [2020-08-22 03:51:31,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,548 INFO L93 Difference]: Finished difference Result 184 states and 318 transitions. [2020-08-22 03:51:31,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,548 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-08-22 03:51:31,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,550 INFO L225 Difference]: With dead ends: 184 [2020-08-22 03:51:31,550 INFO L226 Difference]: Without dead ends: 112 [2020-08-22 03:51:31,551 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 [2020-08-22 03:51:31,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-08-22 03:51:31,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 110. [2020-08-22 03:51:31,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-08-22 03:51:31,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 186 transitions. [2020-08-22 03:51:31,564 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 186 transitions. Word has length 19 [2020-08-22 03:51:31,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,565 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 186 transitions. [2020-08-22 03:51:31,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,565 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 186 transitions. [2020-08-22 03:51:31,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,566 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] [2020-08-22 03:51:31,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 03:51:31,567 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,568 INFO L82 PathProgramCache]: Analyzing trace with hash 290632912, now seen corresponding path program 1 times [2020-08-22 03:51:31,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895365634] [2020-08-22 03:51:31,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895365634] [2020-08-22 03:51:31,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776853755] [2020-08-22 03:51:31,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,620 INFO L87 Difference]: Start difference. First operand 110 states and 186 transitions. Second operand 3 states. [2020-08-22 03:51:31,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,654 INFO L93 Difference]: Finished difference Result 165 states and 277 transitions. [2020-08-22 03:51:31,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,655 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:31,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,656 INFO L225 Difference]: With dead ends: 165 [2020-08-22 03:51:31,657 INFO L226 Difference]: Without dead ends: 114 [2020-08-22 03:51:31,658 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 [2020-08-22 03:51:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-08-22 03:51:31,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-08-22 03:51:31,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-08-22 03:51:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 186 transitions. [2020-08-22 03:51:31,669 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 186 transitions. Word has length 20 [2020-08-22 03:51:31,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,670 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 186 transitions. [2020-08-22 03:51:31,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,670 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 186 transitions. [2020-08-22 03:51:31,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,671 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,671 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] [2020-08-22 03:51:31,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 03:51:31,672 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,673 INFO L82 PathProgramCache]: Analyzing trace with hash 548798350, now seen corresponding path program 1 times [2020-08-22 03:51:31,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634260100] [2020-08-22 03:51:31,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634260100] [2020-08-22 03:51:31,741 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,741 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,741 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43481324] [2020-08-22 03:51:31,742 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,744 INFO L87 Difference]: Start difference. First operand 112 states and 186 transitions. Second operand 3 states. [2020-08-22 03:51:31,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,802 INFO L93 Difference]: Finished difference Result 204 states and 344 transitions. [2020-08-22 03:51:31,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,803 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:31,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,805 INFO L225 Difference]: With dead ends: 204 [2020-08-22 03:51:31,805 INFO L226 Difference]: Without dead ends: 202 [2020-08-22 03:51:31,806 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 [2020-08-22 03:51:31,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-08-22 03:51:31,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 152. [2020-08-22 03:51:31,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-08-22 03:51:31,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 250 transitions. [2020-08-22 03:51:31,831 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 250 transitions. Word has length 20 [2020-08-22 03:51:31,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,831 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 250 transitions. [2020-08-22 03:51:31,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,831 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 250 transitions. [2020-08-22 03:51:31,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 03:51:31,833 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,833 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] [2020-08-22 03:51:31,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 03:51:31,833 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1249862928, now seen corresponding path program 1 times [2020-08-22 03:51:31,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958075444] [2020-08-22 03:51:31,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,857 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,858 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958075444] [2020-08-22 03:51:31,858 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717063844] [2020-08-22 03:51:31,859 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,859 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,860 INFO L87 Difference]: Start difference. First operand 152 states and 250 transitions. Second operand 3 states. [2020-08-22 03:51:31,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,880 INFO L93 Difference]: Finished difference Result 352 states and 584 transitions. [2020-08-22 03:51:31,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,881 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-08-22 03:51:31,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,882 INFO L225 Difference]: With dead ends: 352 [2020-08-22 03:51:31,882 INFO L226 Difference]: Without dead ends: 210 [2020-08-22 03:51:31,884 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 [2020-08-22 03:51:31,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-08-22 03:51:31,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 208. [2020-08-22 03:51:31,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-08-22 03:51:31,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 338 transitions. [2020-08-22 03:51:31,901 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 338 transitions. Word has length 20 [2020-08-22 03:51:31,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,901 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 338 transitions. [2020-08-22 03:51:31,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,901 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 338 transitions. [2020-08-22 03:51:31,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:31,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,903 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] [2020-08-22 03:51:31,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 03:51:31,904 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,904 INFO L82 PathProgramCache]: Analyzing trace with hash -166905624, now seen corresponding path program 1 times [2020-08-22 03:51:31,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,905 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564287115] [2020-08-22 03:51:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564287115] [2020-08-22 03:51:31,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118311313] [2020-08-22 03:51:31,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,929 INFO L87 Difference]: Start difference. First operand 208 states and 338 transitions. Second operand 3 states. [2020-08-22 03:51:31,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:31,947 INFO L93 Difference]: Finished difference Result 312 states and 504 transitions. [2020-08-22 03:51:31,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:31,948 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:31,949 INFO L225 Difference]: With dead ends: 312 [2020-08-22 03:51:31,949 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 03:51:31,950 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 [2020-08-22 03:51:31,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 03:51:31,960 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-08-22 03:51:31,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-08-22 03:51:31,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 338 transitions. [2020-08-22 03:51:31,962 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 338 transitions. Word has length 21 [2020-08-22 03:51:31,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:31,963 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 338 transitions. [2020-08-22 03:51:31,963 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:31,963 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 338 transitions. [2020-08-22 03:51:31,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:31,964 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:31,965 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] [2020-08-22 03:51:31,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 03:51:31,965 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:31,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:31,966 INFO L82 PathProgramCache]: Analyzing trace with hash 91259814, now seen corresponding path program 1 times [2020-08-22 03:51:31,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:31,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [251758138] [2020-08-22 03:51:31,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:31,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:31,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:31,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:31,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [251758138] [2020-08-22 03:51:31,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:31,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:31,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185032857] [2020-08-22 03:51:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:31,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:31,991 INFO L87 Difference]: Start difference. First operand 212 states and 338 transitions. Second operand 3 states. [2020-08-22 03:51:32,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,010 INFO L93 Difference]: Finished difference Result 380 states and 616 transitions. [2020-08-22 03:51:32,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,011 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:32,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,014 INFO L225 Difference]: With dead ends: 380 [2020-08-22 03:51:32,014 INFO L226 Difference]: Without dead ends: 378 [2020-08-22 03:51:32,015 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 [2020-08-22 03:51:32,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2020-08-22 03:51:32,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 296. [2020-08-22 03:51:32,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 296 states. [2020-08-22 03:51:32,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 462 transitions. [2020-08-22 03:51:32,029 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 462 transitions. Word has length 21 [2020-08-22 03:51:32,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,029 INFO L479 AbstractCegarLoop]: Abstraction has 296 states and 462 transitions. [2020-08-22 03:51:32,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,030 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 462 transitions. [2020-08-22 03:51:32,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-08-22 03:51:32,037 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,038 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] [2020-08-22 03:51:32,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 03:51:32,038 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,039 INFO L82 PathProgramCache]: Analyzing trace with hash 792324392, now seen corresponding path program 1 times [2020-08-22 03:51:32,041 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1750916359] [2020-08-22 03:51:32,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,083 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1750916359] [2020-08-22 03:51:32,084 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,084 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,086 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391088824] [2020-08-22 03:51:32,086 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,087 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,087 INFO L87 Difference]: Start difference. First operand 296 states and 462 transitions. Second operand 3 states. [2020-08-22 03:51:32,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,119 INFO L93 Difference]: Finished difference Result 684 states and 1072 transitions. [2020-08-22 03:51:32,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,119 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 21 [2020-08-22 03:51:32,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,122 INFO L225 Difference]: With dead ends: 684 [2020-08-22 03:51:32,123 INFO L226 Difference]: Without dead ends: 402 [2020-08-22 03:51:32,126 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 [2020-08-22 03:51:32,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-08-22 03:51:32,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 400. [2020-08-22 03:51:32,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 400 states. [2020-08-22 03:51:32,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 614 transitions. [2020-08-22 03:51:32,152 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 614 transitions. Word has length 21 [2020-08-22 03:51:32,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,153 INFO L479 AbstractCegarLoop]: Abstraction has 400 states and 614 transitions. [2020-08-22 03:51:32,153 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,153 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 614 transitions. [2020-08-22 03:51:32,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,161 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,161 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] [2020-08-22 03:51:32,161 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 03:51:32,162 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,162 INFO L82 PathProgramCache]: Analyzing trace with hash -1465698011, now seen corresponding path program 1 times [2020-08-22 03:51:32,162 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,163 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253000192] [2020-08-22 03:51:32,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,199 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253000192] [2020-08-22 03:51:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023564799] [2020-08-22 03:51:32,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,201 INFO L87 Difference]: Start difference. First operand 400 states and 614 transitions. Second operand 3 states. [2020-08-22 03:51:32,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,220 INFO L93 Difference]: Finished difference Result 600 states and 916 transitions. [2020-08-22 03:51:32,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,220 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,223 INFO L225 Difference]: With dead ends: 600 [2020-08-22 03:51:32,223 INFO L226 Difference]: Without dead ends: 410 [2020-08-22 03:51:32,224 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 [2020-08-22 03:51:32,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2020-08-22 03:51:32,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 408. [2020-08-22 03:51:32,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-08-22 03:51:32,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 614 transitions. [2020-08-22 03:51:32,238 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 614 transitions. Word has length 22 [2020-08-22 03:51:32,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,238 INFO L479 AbstractCegarLoop]: Abstraction has 408 states and 614 transitions. [2020-08-22 03:51:32,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,239 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 614 transitions. [2020-08-22 03:51:32,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,240 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] [2020-08-22 03:51:32,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 03:51:32,241 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1207532573, now seen corresponding path program 1 times [2020-08-22 03:51:32,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115500804] [2020-08-22 03:51:32,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115500804] [2020-08-22 03:51:32,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282552908] [2020-08-22 03:51:32,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,270 INFO L87 Difference]: Start difference. First operand 408 states and 614 transitions. Second operand 3 states. [2020-08-22 03:51:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,312 INFO L93 Difference]: Finished difference Result 716 states and 1096 transitions. [2020-08-22 03:51:32,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,313 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,317 INFO L225 Difference]: With dead ends: 716 [2020-08-22 03:51:32,318 INFO L226 Difference]: Without dead ends: 714 [2020-08-22 03:51:32,319 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 [2020-08-22 03:51:32,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2020-08-22 03:51:32,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 584. [2020-08-22 03:51:32,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 584 states. [2020-08-22 03:51:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 854 transitions. [2020-08-22 03:51:32,339 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 854 transitions. Word has length 22 [2020-08-22 03:51:32,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,340 INFO L479 AbstractCegarLoop]: Abstraction has 584 states and 854 transitions. [2020-08-22 03:51:32,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,340 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 854 transitions. [2020-08-22 03:51:32,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 03:51:32,341 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,342 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] [2020-08-22 03:51:32,342 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 03:51:32,342 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,343 INFO L82 PathProgramCache]: Analyzing trace with hash -506467995, now seen corresponding path program 1 times [2020-08-22 03:51:32,343 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599617092] [2020-08-22 03:51:32,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,377 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599617092] [2020-08-22 03:51:32,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597278356] [2020-08-22 03:51:32,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,380 INFO L87 Difference]: Start difference. First operand 584 states and 854 transitions. Second operand 3 states. [2020-08-22 03:51:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,412 INFO L93 Difference]: Finished difference Result 1340 states and 1960 transitions. [2020-08-22 03:51:32,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,412 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 22 [2020-08-22 03:51:32,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,417 INFO L225 Difference]: With dead ends: 1340 [2020-08-22 03:51:32,418 INFO L226 Difference]: Without dead ends: 778 [2020-08-22 03:51:32,421 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 [2020-08-22 03:51:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 778 states. [2020-08-22 03:51:32,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 778 to 776. [2020-08-22 03:51:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 776 states. [2020-08-22 03:51:32,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 1110 transitions. [2020-08-22 03:51:32,449 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 1110 transitions. Word has length 22 [2020-08-22 03:51:32,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,449 INFO L479 AbstractCegarLoop]: Abstraction has 776 states and 1110 transitions. [2020-08-22 03:51:32,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,450 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 1110 transitions. [2020-08-22 03:51:32,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,452 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] [2020-08-22 03:51:32,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 03:51:32,452 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1221411293, now seen corresponding path program 1 times [2020-08-22 03:51:32,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1433543266] [2020-08-22 03:51:32,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,487 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1433543266] [2020-08-22 03:51:32,487 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,488 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213541892] [2020-08-22 03:51:32,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,490 INFO L87 Difference]: Start difference. First operand 776 states and 1110 transitions. Second operand 3 states. [2020-08-22 03:51:32,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,522 INFO L93 Difference]: Finished difference Result 1164 states and 1656 transitions. [2020-08-22 03:51:32,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,523 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,527 INFO L225 Difference]: With dead ends: 1164 [2020-08-22 03:51:32,527 INFO L226 Difference]: Without dead ends: 794 [2020-08-22 03:51:32,530 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 [2020-08-22 03:51:32,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 794 states. [2020-08-22 03:51:32,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 794 to 792. [2020-08-22 03:51:32,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 792 states. [2020-08-22 03:51:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1110 transitions. [2020-08-22 03:51:32,559 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1110 transitions. Word has length 23 [2020-08-22 03:51:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,559 INFO L479 AbstractCegarLoop]: Abstraction has 792 states and 1110 transitions. [2020-08-22 03:51:32,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,560 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1110 transitions. [2020-08-22 03:51:32,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,561 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,562 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] [2020-08-22 03:51:32,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 03:51:32,562 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,563 INFO L82 PathProgramCache]: Analyzing trace with hash 1479576731, now seen corresponding path program 1 times [2020-08-22 03:51:32,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538531408] [2020-08-22 03:51:32,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,597 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538531408] [2020-08-22 03:51:32,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590747378] [2020-08-22 03:51:32,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,599 INFO L87 Difference]: Start difference. First operand 792 states and 1110 transitions. Second operand 3 states. [2020-08-22 03:51:32,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,634 INFO L93 Difference]: Finished difference Result 1356 states and 1928 transitions. [2020-08-22 03:51:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,635 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,641 INFO L225 Difference]: With dead ends: 1356 [2020-08-22 03:51:32,642 INFO L226 Difference]: Without dead ends: 1354 [2020-08-22 03:51:32,642 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 [2020-08-22 03:51:32,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2020-08-22 03:51:32,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1160. [2020-08-22 03:51:32,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1160 states. [2020-08-22 03:51:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1160 states to 1160 states and 1574 transitions. [2020-08-22 03:51:32,677 INFO L78 Accepts]: Start accepts. Automaton has 1160 states and 1574 transitions. Word has length 23 [2020-08-22 03:51:32,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,677 INFO L479 AbstractCegarLoop]: Abstraction has 1160 states and 1574 transitions. [2020-08-22 03:51:32,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1160 states and 1574 transitions. [2020-08-22 03:51:32,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-08-22 03:51:32,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,680 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] [2020-08-22 03:51:32,680 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 03:51:32,681 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,681 INFO L82 PathProgramCache]: Analyzing trace with hash -2114325987, now seen corresponding path program 1 times [2020-08-22 03:51:32,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914399762] [2020-08-22 03:51:32,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914399762] [2020-08-22 03:51:32,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31623198] [2020-08-22 03:51:32,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,702 INFO L87 Difference]: Start difference. First operand 1160 states and 1574 transitions. Second operand 3 states. [2020-08-22 03:51:32,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,740 INFO L93 Difference]: Finished difference Result 2636 states and 3560 transitions. [2020-08-22 03:51:32,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,741 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 23 [2020-08-22 03:51:32,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,748 INFO L225 Difference]: With dead ends: 2636 [2020-08-22 03:51:32,748 INFO L226 Difference]: Without dead ends: 1514 [2020-08-22 03:51:32,751 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 [2020-08-22 03:51:32,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1514 states. [2020-08-22 03:51:32,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1514 to 1512. [2020-08-22 03:51:32,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1512 states. [2020-08-22 03:51:32,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1512 states to 1512 states and 1990 transitions. [2020-08-22 03:51:32,796 INFO L78 Accepts]: Start accepts. Automaton has 1512 states and 1990 transitions. Word has length 23 [2020-08-22 03:51:32,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,796 INFO L479 AbstractCegarLoop]: Abstraction has 1512 states and 1990 transitions. [2020-08-22 03:51:32,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1512 states and 1990 transitions. [2020-08-22 03:51:32,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:32,799 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,799 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] [2020-08-22 03:51:32,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 03:51:32,800 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1377545862, now seen corresponding path program 1 times [2020-08-22 03:51:32,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1250349772] [2020-08-22 03:51:32,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,819 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1250349772] [2020-08-22 03:51:32,819 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,820 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,820 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944988811] [2020-08-22 03:51:32,820 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,820 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,821 INFO L87 Difference]: Start difference. First operand 1512 states and 1990 transitions. Second operand 3 states. [2020-08-22 03:51:32,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:32,859 INFO L93 Difference]: Finished difference Result 2268 states and 2968 transitions. [2020-08-22 03:51:32,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:32,860 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:32,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:32,867 INFO L225 Difference]: With dead ends: 2268 [2020-08-22 03:51:32,867 INFO L226 Difference]: Without dead ends: 1546 [2020-08-22 03:51:32,870 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 [2020-08-22 03:51:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1546 states. [2020-08-22 03:51:32,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1546 to 1544. [2020-08-22 03:51:32,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1544 states. [2020-08-22 03:51:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1990 transitions. [2020-08-22 03:51:32,915 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1990 transitions. Word has length 24 [2020-08-22 03:51:32,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:32,916 INFO L479 AbstractCegarLoop]: Abstraction has 1544 states and 1990 transitions. [2020-08-22 03:51:32,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:32,916 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1990 transitions. [2020-08-22 03:51:32,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:32,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:32,919 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] [2020-08-22 03:51:32,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 03:51:32,919 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:32,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:32,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1119380424, now seen corresponding path program 1 times [2020-08-22 03:51:32,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:32,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996468487] [2020-08-22 03:51:32,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:32,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:32,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996468487] [2020-08-22 03:51:32,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:32,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:32,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024192741] [2020-08-22 03:51:32,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:32,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:32,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:32,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:32,962 INFO L87 Difference]: Start difference. First operand 1544 states and 1990 transitions. Second operand 3 states. [2020-08-22 03:51:33,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,031 INFO L93 Difference]: Finished difference Result 2572 states and 3336 transitions. [2020-08-22 03:51:33,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,032 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:33,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,047 INFO L225 Difference]: With dead ends: 2572 [2020-08-22 03:51:33,047 INFO L226 Difference]: Without dead ends: 2570 [2020-08-22 03:51:33,049 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 [2020-08-22 03:51:33,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2570 states. [2020-08-22 03:51:33,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2570 to 2312. [2020-08-22 03:51:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2312 states. [2020-08-22 03:51:33,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2312 states to 2312 states and 2886 transitions. [2020-08-22 03:51:33,155 INFO L78 Accepts]: Start accepts. Automaton has 2312 states and 2886 transitions. Word has length 24 [2020-08-22 03:51:33,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,155 INFO L479 AbstractCegarLoop]: Abstraction has 2312 states and 2886 transitions. [2020-08-22 03:51:33,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,156 INFO L276 IsEmpty]: Start isEmpty. Operand 2312 states and 2886 transitions. [2020-08-22 03:51:33,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 03:51:33,160 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,160 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] [2020-08-22 03:51:33,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 03:51:33,161 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,161 INFO L82 PathProgramCache]: Analyzing trace with hash -418315846, now seen corresponding path program 1 times [2020-08-22 03:51:33,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,162 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667613360] [2020-08-22 03:51:33,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667613360] [2020-08-22 03:51:33,206 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840361184] [2020-08-22 03:51:33,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,208 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,209 INFO L87 Difference]: Start difference. First operand 2312 states and 2886 transitions. Second operand 3 states. [2020-08-22 03:51:33,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,306 INFO L93 Difference]: Finished difference Result 5196 states and 6408 transitions. [2020-08-22 03:51:33,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,307 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 24 [2020-08-22 03:51:33,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,321 INFO L225 Difference]: With dead ends: 5196 [2020-08-22 03:51:33,321 INFO L226 Difference]: Without dead ends: 2954 [2020-08-22 03:51:33,326 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 [2020-08-22 03:51:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2954 states. [2020-08-22 03:51:33,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2954 to 2952. [2020-08-22 03:51:33,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2952 states. [2020-08-22 03:51:33,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2952 states to 2952 states and 3526 transitions. [2020-08-22 03:51:33,408 INFO L78 Accepts]: Start accepts. Automaton has 2952 states and 3526 transitions. Word has length 24 [2020-08-22 03:51:33,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,409 INFO L479 AbstractCegarLoop]: Abstraction has 2952 states and 3526 transitions. [2020-08-22 03:51:33,409 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,409 INFO L276 IsEmpty]: Start isEmpty. Operand 2952 states and 3526 transitions. [2020-08-22 03:51:33,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,414 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 03:51:33,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 03:51:33,417 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,418 INFO L82 PathProgramCache]: Analyzing trace with hash -340838702, now seen corresponding path program 1 times [2020-08-22 03:51:33,418 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,418 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2001605513] [2020-08-22 03:51:33,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2001605513] [2020-08-22 03:51:33,439 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,439 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,440 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795049282] [2020-08-22 03:51:33,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,441 INFO L87 Difference]: Start difference. First operand 2952 states and 3526 transitions. Second operand 3 states. [2020-08-22 03:51:33,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,498 INFO L93 Difference]: Finished difference Result 4428 states and 5256 transitions. [2020-08-22 03:51:33,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,499 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,512 INFO L225 Difference]: With dead ends: 4428 [2020-08-22 03:51:33,512 INFO L226 Difference]: Without dead ends: 3018 [2020-08-22 03:51:33,515 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 [2020-08-22 03:51:33,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3018 states. [2020-08-22 03:51:33,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3018 to 3016. [2020-08-22 03:51:33,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 03:51:33,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3526 transitions. [2020-08-22 03:51:33,643 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3526 transitions. Word has length 25 [2020-08-22 03:51:33,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,644 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3526 transitions. [2020-08-22 03:51:33,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,644 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3526 transitions. [2020-08-22 03:51:33,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,649 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,649 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] [2020-08-22 03:51:33,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 03:51:33,649 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,650 INFO L82 PathProgramCache]: Analyzing trace with hash -82673264, now seen corresponding path program 1 times [2020-08-22 03:51:33,650 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1714005558] [2020-08-22 03:51:33,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1714005558] [2020-08-22 03:51:33,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817858412] [2020-08-22 03:51:33,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,683 INFO L87 Difference]: Start difference. First operand 3016 states and 3526 transitions. Second operand 3 states. [2020-08-22 03:51:33,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,785 INFO L93 Difference]: Finished difference Result 8650 states and 9799 transitions. [2020-08-22 03:51:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,786 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,799 INFO L225 Difference]: With dead ends: 8650 [2020-08-22 03:51:33,799 INFO L226 Difference]: Without dead ends: 3016 [2020-08-22 03:51:33,810 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 [2020-08-22 03:51:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3016 states. [2020-08-22 03:51:33,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3016 to 3016. [2020-08-22 03:51:33,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3016 states. [2020-08-22 03:51:33,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3016 states to 3016 states and 3270 transitions. [2020-08-22 03:51:33,906 INFO L78 Accepts]: Start accepts. Automaton has 3016 states and 3270 transitions. Word has length 25 [2020-08-22 03:51:33,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:33,907 INFO L479 AbstractCegarLoop]: Abstraction has 3016 states and 3270 transitions. [2020-08-22 03:51:33,907 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:33,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3016 states and 3270 transitions. [2020-08-22 03:51:33,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-08-22 03:51:33,911 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 03:51:33,912 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] [2020-08-22 03:51:33,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 03:51:33,914 INFO L427 AbstractCegarLoop]: === Iteration 23 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 03:51:33,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 03:51:33,914 INFO L82 PathProgramCache]: Analyzing trace with hash -783737842, now seen corresponding path program 1 times [2020-08-22 03:51:33,914 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 03:51:33,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753031994] [2020-08-22 03:51:33,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 03:51:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 03:51:33,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 03:51:33,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 03:51:33,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753031994] [2020-08-22 03:51:33,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 03:51:33,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 03:51:33,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265601337] [2020-08-22 03:51:33,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 03:51:33,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 03:51:33,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 03:51:33,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 03:51:33,945 INFO L87 Difference]: Start difference. First operand 3016 states and 3270 transitions. Second operand 3 states. [2020-08-22 03:51:33,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 03:51:33,994 INFO L93 Difference]: Finished difference Result 3016 states and 3270 transitions. [2020-08-22 03:51:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 03:51:33,995 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-08-22 03:51:33,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 03:51:33,996 INFO L225 Difference]: With dead ends: 3016 [2020-08-22 03:51:33,996 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 03:51:34,001 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 [2020-08-22 03:51:34,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 03:51:34,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 03:51:34,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 03:51:34,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 03:51:34,003 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 25 [2020-08-22 03:51:34,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 03:51:34,003 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 03:51:34,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 03:51:34,003 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 03:51:34,003 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 03:51:34,003 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 03:51:34,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 03:51:34,031 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-08-22 03:51:34,031 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:34,031 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 03:51:34,032 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 03:51:34,032 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 03:51:34,032 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 03:51:34,032 INFO L268 CegarLoopResult]: For program point L126(line 126) no Hoare annotation was computed. [2020-08-22 03:51:34,032 INFO L264 CegarLoopResult]: At program point L126-1(lines 5 135) the Hoare annotation is: false [2020-08-22 03:51:34,032 INFO L268 CegarLoopResult]: For program point L60-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,032 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 4 135) no Hoare annotation was computed. [2020-08-22 03:51:34,032 INFO L268 CegarLoopResult]: For program point L110-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point L111(line 111) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point L95-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point L120-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 4 135) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point L96(line 96) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point mainErr0ASSERT_VIOLATIONERROR_FUNCTION(line 133) no Hoare annotation was computed. [2020-08-22 03:51:34,033 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 4 135) the Hoare annotation is: true [2020-08-22 03:51:34,033 INFO L268 CegarLoopResult]: For program point L121(line 121) no Hoare annotation was computed. [2020-08-22 03:51:34,034 INFO L268 CegarLoopResult]: For program point L80-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,035 INFO L268 CegarLoopResult]: For program point L105-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,035 INFO L268 CegarLoopResult]: For program point L72-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L64-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L56(lines 56 58) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L56-2(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L106(line 106) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L271 CegarLoopResult]: At program point L131(lines 5 135) the Hoare annotation is: true [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L90-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L115-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L91(line 91) no Hoare annotation was computed. [2020-08-22 03:51:34,036 INFO L268 CegarLoopResult]: For program point L116(line 116) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L100-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L271 CegarLoopResult]: At program point L125-1(lines 33 130) the Hoare annotation is: true [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L84-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L76-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L101(line 101) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L35(lines 35 37) no Hoare annotation was computed. [2020-08-22 03:51:34,037 INFO L268 CegarLoopResult]: For program point L68-1(lines 33 130) no Hoare annotation was computed. [2020-08-22 03:51:34,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 03:51:34 BoogieIcfgContainer [2020-08-22 03:51:34,052 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 03:51:34,056 INFO L168 Benchmark]: Toolchain (without parser) took 4207.73 ms. Allocated memory was 141.6 MB in the beginning and 285.2 MB in the end (delta: 143.7 MB). Free memory was 103.4 MB in the beginning and 147.5 MB in the end (delta: -44.1 MB). Peak memory consumption was 99.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,057 INFO L168 Benchmark]: CDTParser took 0.87 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,057 INFO L168 Benchmark]: CACSL2BoogieTranslator took 260.37 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,058 INFO L168 Benchmark]: Boogie Preprocessor took 113.61 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,059 INFO L168 Benchmark]: RCFGBuilder took 329.34 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 165.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,059 INFO L168 Benchmark]: TraceAbstraction took 3498.61 ms. Allocated memory was 203.9 MB in the beginning and 285.2 MB in the end (delta: 81.3 MB). Free memory was 164.4 MB in the beginning and 147.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 98.2 MB. Max. memory is 7.1 GB. [2020-08-22 03:51:34,068 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.87 ms. Allocated memory is still 141.6 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 260.37 ms. Allocated memory is still 141.6 MB. Free memory was 103.2 MB in the beginning and 92.7 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.61 ms. Allocated memory was 141.6 MB in the beginning and 203.9 MB in the end (delta: 62.4 MB). Free memory was 92.7 MB in the beginning and 182.7 MB in the end (delta: -89.9 MB). Peak memory consumption was 13.1 MB. Max. memory is 7.1 GB. * RCFGBuilder took 329.34 ms. Allocated memory is still 203.9 MB. Free memory was 182.1 MB in the beginning and 165.1 MB in the end (delta: 17.0 MB). Peak memory consumption was 17.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 3498.61 ms. Allocated memory was 203.9 MB in the beginning and 285.2 MB in the end (delta: 81.3 MB). Free memory was 164.4 MB in the beginning and 147.5 MB in the end (delta: 16.9 MB). Peak memory consumption was 98.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 133]: 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: 33]: 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, 38 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 3.3s, OverallIterations: 23, TraceHistogramMax: 1, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1573 SDtfs, 755 SDslu, 1056 SDs, 0 SdLazy, 121 SolverSat, 23 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 115 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=3016occurred in iteration=21, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.8s AutomataMinimizationTime, 23 MinimizatonAttempts, 790 StatesRemovedByMinimization, 21 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 7 PreInvPairs, 266 NumberOfFragments, 7 HoareAnnotationTreeSize, 7 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 0.5s InterpolantComputationTime, 498 NumberOfCodeBlocks, 498 NumberOfCodeBlocksAsserted, 23 NumberOfCheckSat, 475 ConstructedInterpolants, 0 QuantifiedInterpolants, 19027 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 23 InterpolantComputations, 23 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...