/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=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=1.0 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 02:52:45,429 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 02:52:45,432 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 02:52:45,472 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 02:52:45,472 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 02:52:45,481 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 02:52:45,483 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 02:52:45,487 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 02:52:45,489 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 02:52:45,492 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 02:52:45,493 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 02:52:45,494 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 02:52:45,494 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 02:52:45,497 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 02:52:45,499 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 02:52:45,500 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 02:52:45,502 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 02:52:45,503 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 02:52:45,504 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 02:52:45,509 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 02:52:45,510 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 02:52:45,511 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 02:52:45,512 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 02:52:45,513 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 02:52:45,515 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 02:52:45,522 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 02:52:45,523 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 02:52:45,523 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 02:52:45,524 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 [2020-08-19 02:52:45,547 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 02:52:45,547 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 02:52:45,548 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 02:52:45,548 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 02:52:45,548 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 02:52:45,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 02:52:45,549 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 02:52:45,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 02:52:45,549 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 02:52:45,549 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 02:52:45,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 02:52:45,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 02:52:45,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 02:52:45,550 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 02:52:45,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 02:52:45,551 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 02:52:45,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 02:52:45,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 02:52:45,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 02:52:45,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 02:52:45,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 02:52:45,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 02:52:45,552 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 02:52:45,552 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 02:52:45,552 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 02:52:45,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 02:52:45,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 02:52:45,553 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 02:52:45,553 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 02:52:45,553 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=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=1.0; [2020-08-19 02:52:45,868 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 02:52:45,884 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 02:52:45,890 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 02:52:45,892 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 02:52:45,892 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 02:52:45,892 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 02:52:45,946 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/add23aede/c243cd09907c433da826335e66ffbdfb/FLAG69ca3ee08 [2020-08-19 02:52:46,458 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 02:52:46,459 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-19 02:52:46,467 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/add23aede/c243cd09907c433da826335e66ffbdfb/FLAG69ca3ee08 [2020-08-19 02:52:46,777 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/add23aede/c243cd09907c433da826335e66ffbdfb [2020-08-19 02:52:46,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 02:52:46,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 02:52:46,788 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 02:52:46,788 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 02:52:46,792 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 02:52:46,793 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:52:46" (1/1) ... [2020-08-19 02:52:46,796 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4076c4d9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:46, skipping insertion in model container [2020-08-19 02:52:46,796 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 02:52:46" (1/1) ... [2020-08-19 02:52:46,804 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 02:52:46,824 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 02:52:47,016 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:52:47,026 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 02:52:47,055 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 02:52:47,160 INFO L208 MainTranslator]: Completed translation [2020-08-19 02:52:47,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47 WrapperNode [2020-08-19 02:52:47,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 02:52:47,161 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 02:52:47,161 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 02:52:47,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 02:52:47,171 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,171 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,180 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,180 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,190 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,199 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,201 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (1/1) ... [2020-08-19 02:52:47,204 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 02:52:47,205 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 02:52:47,205 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 02:52:47,205 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 02:52:47,206 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (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 [2020-08-19 02:52:47,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 02:52:47,270 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 02:52:47,271 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 02:52:47,272 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-19 02:52:47,272 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-19 02:52:47,272 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-19 02:52:47,273 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 02:52:47,274 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 02:52:47,685 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 02:52:47,686 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-19 02:52:47,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:52:47 BoogieIcfgContainer [2020-08-19 02:52:47,691 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 02:52:47,692 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 02:52:47,692 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 02:52:47,695 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 02:52:47,696 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 02:52:46" (1/3) ... [2020-08-19 02:52:47,696 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194aa7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:52:47, skipping insertion in model container [2020-08-19 02:52:47,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 02:52:47" (2/3) ... [2020-08-19 02:52:47,697 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@194aa7dd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 02:52:47, skipping insertion in model container [2020-08-19 02:52:47,697 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 02:52:47" (3/3) ... [2020-08-19 02:52:47,699 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-19 02:52:47,710 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 02:52:47,718 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 02:52:47,732 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 02:52:47,764 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 02:52:47,764 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 02:52:47,764 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 02:52:47,764 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 02:52:47,764 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 02:52:47,764 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 02:52:47,765 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 02:52:47,765 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 02:52:47,782 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-19 02:52:47,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-19 02:52:47,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:47,788 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:47,788 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:47,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:47,793 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-19 02:52:47,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:47,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [153184971] [2020-08-19 02:52:47,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:47,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:47,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:48,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [153184971] [2020-08-19 02:52:48,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:48,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 02:52:48,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507559556] [2020-08-19 02:52:48,023 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 02:52:48,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:48,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 02:52:48,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:52:48,042 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-19 02:52:48,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:48,426 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-19 02:52:48,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 02:52:48,429 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-19 02:52:48,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:48,448 INFO L225 Difference]: With dead ends: 150 [2020-08-19 02:52:48,449 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 02:52:48,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 02:52:48,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 02:52:48,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-19 02:52:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-19 02:52:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-19 02:52:48,518 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-19 02:52:48,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:48,518 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-19 02:52:48,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 02:52:48,519 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-19 02:52:48,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-19 02:52:48,520 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:48,520 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:48,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 02:52:48,521 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:48,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:48,521 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-19 02:52:48,522 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:48,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [173133950] [2020-08-19 02:52:48,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:48,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:48,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:48,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [173133950] [2020-08-19 02:52:48,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:48,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 02:52:48,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658406168] [2020-08-19 02:52:48,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:52:48,595 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:52:48,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:48,596 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-19 02:52:48,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:48,906 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-19 02:52:48,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:52:48,907 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-19 02:52:48,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:48,910 INFO L225 Difference]: With dead ends: 170 [2020-08-19 02:52:48,910 INFO L226 Difference]: Without dead ends: 122 [2020-08-19 02:52:48,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:48,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-19 02:52:48,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-19 02:52:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-19 02:52:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-19 02:52:48,925 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-19 02:52:48,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:48,926 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-19 02:52:48,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:52:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-19 02:52:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-19 02:52:48,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:48,927 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:48,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 02:52:48,928 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:48,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-19 02:52:48,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:48,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498322789] [2020-08-19 02:52:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:48,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:49,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:49,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498322789] [2020-08-19 02:52:49,034 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:49,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:52:49,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399145722] [2020-08-19 02:52:49,035 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:52:49,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:49,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:52:49,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:49,036 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-19 02:52:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:49,387 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-19 02:52:49,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:52:49,389 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-19 02:52:49,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:49,396 INFO L225 Difference]: With dead ends: 203 [2020-08-19 02:52:49,396 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 02:52:49,398 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:52:49,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 02:52:49,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-19 02:52:49,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-19 02:52:49,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-19 02:52:49,425 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-19 02:52:49,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:49,425 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-19 02:52:49,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:52:49,425 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-19 02:52:49,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-19 02:52:49,429 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:49,429 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:49,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 02:52:49,429 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:49,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:49,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-19 02:52:49,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:49,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [868004699] [2020-08-19 02:52:49,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:49,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:49,562 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:49,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [868004699] [2020-08-19 02:52:49,565 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:49,565 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 02:52:49,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738303355] [2020-08-19 02:52:49,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:52:49,566 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:49,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:52:49,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:52:49,570 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-19 02:52:50,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:50,041 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-19 02:52:50,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:52:50,042 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-19 02:52:50,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:50,045 INFO L225 Difference]: With dead ends: 236 [2020-08-19 02:52:50,045 INFO L226 Difference]: Without dead ends: 188 [2020-08-19 02:52:50,046 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:52:50,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-19 02:52:50,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-19 02:52:50,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-19 02:52:50,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-19 02:52:50,059 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-19 02:52:50,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:50,059 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-19 02:52:50,059 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:52:50,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-19 02:52:50,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-19 02:52:50,060 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:50,061 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:50,061 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 02:52:50,061 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:50,063 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-19 02:52:50,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:50,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929985282] [2020-08-19 02:52:50,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:50,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:50,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,129 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-19 02:52:50,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929985282] [2020-08-19 02:52:50,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:52:50,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:52:50,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249344362] [2020-08-19 02:52:50,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:52:50,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:50,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:52:50,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:50,131 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-19 02:52:50,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:50,253 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-19 02:52:50,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 02:52:50,254 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-19 02:52:50,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:50,255 INFO L225 Difference]: With dead ends: 116 [2020-08-19 02:52:50,255 INFO L226 Difference]: Without dead ends: 67 [2020-08-19 02:52:50,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:52:50,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-19 02:52:50,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-19 02:52:50,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-19 02:52:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-19 02:52:50,265 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-19 02:52:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:50,266 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-19 02:52:50,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:52:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-19 02:52:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-19 02:52:50,268 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:50,268 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:50,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 02:52:50,268 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-19 02:52:50,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:50,269 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485858939] [2020-08-19 02:52:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:50,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:50,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-19 02:52:50,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 02:52:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,375 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:50,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485858939] [2020-08-19 02:52:50,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:50,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 02:52:50,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91347576] [2020-08-19 02:52:50,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 02:52:50,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:50,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 02:52:50,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 02:52:50,377 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-19 02:52:50,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:50,777 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-19 02:52:50,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 02:52:50,787 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-19 02:52:50,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:50,792 INFO L225 Difference]: With dead ends: 223 [2020-08-19 02:52:50,793 INFO L226 Difference]: Without dead ends: 173 [2020-08-19 02:52:50,795 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:52:50,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-19 02:52:50,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-19 02:52:50,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-19 02:52:50,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-19 02:52:50,839 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-19 02:52:50,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:50,839 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-19 02:52:50,839 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 02:52:50,840 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-19 02:52:50,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-19 02:52:50,844 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:50,844 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:50,845 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 02:52:50,845 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:50,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:50,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-19 02:52:50,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:50,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357253623] [2020-08-19 02:52:50,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:50,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-19 02:52:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:50,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 02:52:50,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:51,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357253623] [2020-08-19 02:52:51,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:51,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 02:52:51,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828324806] [2020-08-19 02:52:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 02:52:51,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 02:52:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-19 02:52:51,005 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-19 02:52:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:51,466 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-19 02:52:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 02:52:51,467 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-19 02:52:51,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:51,469 INFO L225 Difference]: With dead ends: 246 [2020-08-19 02:52:51,469 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 02:52:51,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:52:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 02:52:51,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-19 02:52:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-19 02:52:51,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-19 02:52:51,496 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-19 02:52:51,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:51,497 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-19 02:52:51,497 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 02:52:51,497 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-19 02:52:51,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-19 02:52:51,498 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:51,502 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:51,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 02:52:51,503 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:51,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:51,503 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-19 02:52:51,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:51,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1573211816] [2020-08-19 02:52:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:51,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 02:52:51,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 02:52:51,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:51,639 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:51,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1573211816] [2020-08-19 02:52:51,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:51,640 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 02:52:51,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455802958] [2020-08-19 02:52:51,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 02:52:51,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:51,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 02:52:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:52:51,642 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-19 02:52:52,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:52,169 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-19 02:52:52,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 02:52:52,170 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-19 02:52:52,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:52,173 INFO L225 Difference]: With dead ends: 269 [2020-08-19 02:52:52,173 INFO L226 Difference]: Without dead ends: 219 [2020-08-19 02:52:52,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:52:52,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-19 02:52:52,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-19 02:52:52,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-19 02:52:52,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-19 02:52:52,189 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-19 02:52:52,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:52,189 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-19 02:52:52,190 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 02:52:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-19 02:52:52,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-19 02:52:52,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:52,191 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:52,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 02:52:52,192 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:52,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-19 02:52:52,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:52,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011740144] [2020-08-19 02:52:52,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:52,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:52,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 02:52:52,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 02:52:52,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:52,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011740144] [2020-08-19 02:52:52,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:52,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 02:52:52,311 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915966242] [2020-08-19 02:52:52,312 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 02:52:52,312 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:52,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 02:52:52,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-19 02:52:52,313 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-19 02:52:52,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:52,842 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-19 02:52:52,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 02:52:52,843 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-19 02:52:52,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:52,846 INFO L225 Difference]: With dead ends: 292 [2020-08-19 02:52:52,846 INFO L226 Difference]: Without dead ends: 242 [2020-08-19 02:52:52,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:52:52,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-19 02:52:52,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-19 02:52:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-19 02:52:52,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-19 02:52:52,859 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-19 02:52:52,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:52,859 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-19 02:52:52,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 02:52:52,859 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-19 02:52:52,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-19 02:52:52,860 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:52,860 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:52,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 02:52:52,861 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:52,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:52,861 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-19 02:52:52,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:52,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506053779] [2020-08-19 02:52:52,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:52,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 02:52:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:52:52,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:52,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506053779] [2020-08-19 02:52:52,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:52,995 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 02:52:52,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570471311] [2020-08-19 02:52:52,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 02:52:52,996 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:52,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 02:52:52,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-19 02:52:52,997 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-19 02:52:53,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:53,631 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-19 02:52:53,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 02:52:53,631 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-19 02:52:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:53,634 INFO L225 Difference]: With dead ends: 315 [2020-08-19 02:52:53,634 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 02:52:53,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:52:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 02:52:53,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-19 02:52:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-19 02:52:53,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-19 02:52:53,646 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-19 02:52:53,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:53,646 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-19 02:52:53,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 02:52:53,646 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-19 02:52:53,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 02:52:53,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:53,648 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:53,648 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 02:52:53,648 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:53,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:53,648 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-19 02:52:53,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:53,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908346340] [2020-08-19 02:52:53,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:53,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 02:52:53,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:52:53,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:53,814 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:53,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908346340] [2020-08-19 02:52:53,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:53,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 02:52:53,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057708497] [2020-08-19 02:52:53,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 02:52:53,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:53,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 02:52:53,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-19 02:52:53,816 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-19 02:52:54,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:54,469 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-19 02:52:54,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 02:52:54,469 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-19 02:52:54,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:54,472 INFO L225 Difference]: With dead ends: 338 [2020-08-19 02:52:54,472 INFO L226 Difference]: Without dead ends: 288 [2020-08-19 02:52:54,473 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:52:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-19 02:52:54,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-19 02:52:54,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-19 02:52:54,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-19 02:52:54,482 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-19 02:52:54,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:54,483 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-19 02:52:54,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 02:52:54,483 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-19 02:52:54,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 02:52:54,484 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:54,484 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:54,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 02:52:54,485 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:54,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:54,485 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-19 02:52:54,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:54,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666824210] [2020-08-19 02:52:54,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:54,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:54,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 02:52:54,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 02:52:54,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:54,731 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:54,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666824210] [2020-08-19 02:52:54,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:54,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 02:52:54,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386857337] [2020-08-19 02:52:54,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 02:52:54,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:54,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 02:52:54,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-19 02:52:54,733 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-19 02:52:55,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:55,521 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-19 02:52:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 02:52:55,521 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-19 02:52:55,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:55,524 INFO L225 Difference]: With dead ends: 361 [2020-08-19 02:52:55,524 INFO L226 Difference]: Without dead ends: 311 [2020-08-19 02:52:55,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:52:55,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-19 02:52:55,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-19 02:52:55,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-19 02:52:55,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-19 02:52:55,536 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-19 02:52:55,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:55,536 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-19 02:52:55,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 02:52:55,537 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-19 02:52:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-19 02:52:55,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:55,538 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:55,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 02:52:55,539 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:55,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:55,539 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-19 02:52:55,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:55,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541558456] [2020-08-19 02:52:55,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:55,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:55,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 02:52:55,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:52:55,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:55,754 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:55,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541558456] [2020-08-19 02:52:55,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:55,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 02:52:55,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235450099] [2020-08-19 02:52:55,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 02:52:55,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:55,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 02:52:55,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-19 02:52:55,758 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-19 02:52:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:56,553 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-19 02:52:56,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 02:52:56,554 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-19 02:52:56,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:56,556 INFO L225 Difference]: With dead ends: 384 [2020-08-19 02:52:56,556 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 02:52:56,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:52:56,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 02:52:56,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-19 02:52:56,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-19 02:52:56,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-19 02:52:56,566 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-19 02:52:56,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:56,566 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-19 02:52:56,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 02:52:56,567 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-19 02:52:56,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 02:52:56,567 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:56,568 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:56,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 02:52:56,568 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:56,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:56,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-19 02:52:56,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:56,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943125664] [2020-08-19 02:52:56,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:56,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 02:52:56,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 02:52:56,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:56,742 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:56,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943125664] [2020-08-19 02:52:56,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:56,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 02:52:56,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803387095] [2020-08-19 02:52:56,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 02:52:56,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:56,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 02:52:56,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-19 02:52:56,746 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-19 02:52:57,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:57,464 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-19 02:52:57,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 02:52:57,464 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-19 02:52:57,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:57,467 INFO L225 Difference]: With dead ends: 407 [2020-08-19 02:52:57,467 INFO L226 Difference]: Without dead ends: 357 [2020-08-19 02:52:57,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:52:57,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-19 02:52:57,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-19 02:52:57,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 02:52:57,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-19 02:52:57,478 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-19 02:52:57,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:57,478 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-19 02:52:57,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 02:52:57,478 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-19 02:52:57,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 02:52:57,479 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:57,479 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:57,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 02:52:57,480 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:57,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:57,480 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-19 02:52:57,480 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:57,480 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041308915] [2020-08-19 02:52:57,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 02:52:57,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 02:52:57,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:57,685 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:57,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041308915] [2020-08-19 02:52:57,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:57,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 02:52:57,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636248456] [2020-08-19 02:52:57,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 02:52:57,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:57,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 02:52:57,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-19 02:52:57,687 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-19 02:52:58,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:58,488 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-19 02:52:58,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 02:52:58,489 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-19 02:52:58,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:58,491 INFO L225 Difference]: With dead ends: 430 [2020-08-19 02:52:58,492 INFO L226 Difference]: Without dead ends: 380 [2020-08-19 02:52:58,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:52:58,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-19 02:52:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-19 02:52:58,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-19 02:52:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-19 02:52:58,506 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-19 02:52:58,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:58,506 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-19 02:52:58,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 02:52:58,506 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-19 02:52:58,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-19 02:52:58,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:58,507 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:58,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 02:52:58,508 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:58,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:58,508 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-19 02:52:58,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:58,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092294768] [2020-08-19 02:52:58,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:52:58,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 02:52:58,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:52:58,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:52:58,731 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:52:58,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092294768] [2020-08-19 02:52:58,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:52:58,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 02:52:58,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118306849] [2020-08-19 02:52:58,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 02:52:58,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:52:58,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 02:52:58,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-19 02:52:58,733 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-19 02:52:59,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:52:59,847 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-19 02:52:59,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 02:52:59,848 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-19 02:52:59,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:52:59,852 INFO L225 Difference]: With dead ends: 453 [2020-08-19 02:52:59,852 INFO L226 Difference]: Without dead ends: 403 [2020-08-19 02:52:59,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:52:59,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-19 02:52:59,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-19 02:52:59,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-19 02:52:59,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-19 02:52:59,869 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-19 02:52:59,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:52:59,873 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-19 02:52:59,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 02:52:59,873 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-19 02:52:59,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 02:52:59,874 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:52:59,874 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:52:59,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 02:52:59,875 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:52:59,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:52:59,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-19 02:52:59,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:52:59,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853577516] [2020-08-19 02:52:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:52:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:00,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:00,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:00,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 02:53:00,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:00,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 02:53:00,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:00,196 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:00,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853577516] [2020-08-19 02:53:00,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:00,197 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 02:53:00,197 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567789612] [2020-08-19 02:53:00,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 02:53:00,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:00,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 02:53:00,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-19 02:53:00,200 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-19 02:53:01,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:01,123 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-19 02:53:01,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 02:53:01,124 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-19 02:53:01,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:01,127 INFO L225 Difference]: With dead ends: 476 [2020-08-19 02:53:01,127 INFO L226 Difference]: Without dead ends: 426 [2020-08-19 02:53:01,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:53:01,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-19 02:53:01,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-19 02:53:01,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 02:53:01,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-19 02:53:01,143 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-19 02:53:01,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:01,143 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-19 02:53:01,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 02:53:01,144 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-19 02:53:01,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 02:53:01,144 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:01,145 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:01,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 02:53:01,145 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:01,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:01,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-19 02:53:01,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:01,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089563062] [2020-08-19 02:53:01,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:01,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 02:53:01,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 02:53:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:01,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089563062] [2020-08-19 02:53:01,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:01,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 02:53:01,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873129806] [2020-08-19 02:53:01,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 02:53:01,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:01,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 02:53:01,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-19 02:53:01,429 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-19 02:53:02,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:02,649 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-19 02:53:02,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 02:53:02,650 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-19 02:53:02,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:02,657 INFO L225 Difference]: With dead ends: 499 [2020-08-19 02:53:02,657 INFO L226 Difference]: Without dead ends: 449 [2020-08-19 02:53:02,658 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:53:02,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-19 02:53:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-19 02:53:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-19 02:53:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-19 02:53:02,669 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-19 02:53:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:02,669 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-19 02:53:02,670 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 02:53:02,670 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-19 02:53:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-19 02:53:02,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:02,671 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:02,671 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 02:53:02,671 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:02,671 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-19 02:53:02,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:02,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294339602] [2020-08-19 02:53:02,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:02,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:02,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 02:53:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 02:53:02,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:02,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294339602] [2020-08-19 02:53:02,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:02,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 02:53:02,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422406534] [2020-08-19 02:53:02,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 02:53:02,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:02,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 02:53:02,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-19 02:53:02,985 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-19 02:53:04,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:04,354 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-19 02:53:04,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 02:53:04,355 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-19 02:53:04,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:04,360 INFO L225 Difference]: With dead ends: 522 [2020-08-19 02:53:04,360 INFO L226 Difference]: Without dead ends: 472 [2020-08-19 02:53:04,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:53:04,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-19 02:53:04,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-19 02:53:04,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-19 02:53:04,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-19 02:53:04,375 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-19 02:53:04,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:04,375 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-19 02:53:04,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 02:53:04,375 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-19 02:53:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 02:53:04,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:04,376 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:04,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 02:53:04,377 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:04,377 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-19 02:53:04,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:04,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1746643273] [2020-08-19 02:53:04,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:04,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:04,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 02:53:04,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 02:53:04,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:04,678 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:04,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1746643273] [2020-08-19 02:53:04,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:04,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 02:53:04,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560709017] [2020-08-19 02:53:04,683 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 02:53:04,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 02:53:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-19 02:53:04,685 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-19 02:53:06,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:06,111 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-19 02:53:06,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 02:53:06,111 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-19 02:53:06,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:06,115 INFO L225 Difference]: With dead ends: 545 [2020-08-19 02:53:06,116 INFO L226 Difference]: Without dead ends: 495 [2020-08-19 02:53:06,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:53:06,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-19 02:53:06,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-19 02:53:06,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 02:53:06,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-19 02:53:06,139 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-19 02:53:06,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:06,140 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-19 02:53:06,140 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 02:53:06,140 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-19 02:53:06,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 02:53:06,141 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:06,141 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:06,141 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 02:53:06,141 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:06,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:06,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-19 02:53:06,142 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:06,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940488892] [2020-08-19 02:53:06,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:06,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:06,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 02:53:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 02:53:06,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:06,488 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:06,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [940488892] [2020-08-19 02:53:06,490 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:06,490 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 02:53:06,490 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348700194] [2020-08-19 02:53:06,491 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 02:53:06,491 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:06,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 02:53:06,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-19 02:53:06,492 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-19 02:53:07,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:07,624 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-19 02:53:07,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 02:53:07,625 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-19 02:53:07,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:07,628 INFO L225 Difference]: With dead ends: 568 [2020-08-19 02:53:07,629 INFO L226 Difference]: Without dead ends: 518 [2020-08-19 02:53:07,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:53:07,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-19 02:53:07,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-19 02:53:07,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-19 02:53:07,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-19 02:53:07,641 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-19 02:53:07,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:07,641 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-19 02:53:07,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 02:53:07,642 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-19 02:53:07,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-19 02:53:07,642 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:07,643 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:07,643 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 02:53:07,643 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:07,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:07,643 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-19 02:53:07,644 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:07,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [566559316] [2020-08-19 02:53:07,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:07,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:07,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:07,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 02:53:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:08,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 02:53:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:08,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [566559316] [2020-08-19 02:53:08,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:08,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 02:53:08,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312806046] [2020-08-19 02:53:08,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 02:53:08,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:08,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 02:53:08,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-19 02:53:08,032 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-19 02:53:09,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:09,306 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-19 02:53:09,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 02:53:09,307 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-19 02:53:09,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:09,310 INFO L225 Difference]: With dead ends: 591 [2020-08-19 02:53:09,311 INFO L226 Difference]: Without dead ends: 541 [2020-08-19 02:53:09,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:53:09,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-19 02:53:09,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-19 02:53:09,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-19 02:53:09,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-19 02:53:09,324 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-19 02:53:09,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:09,325 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-19 02:53:09,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 02:53:09,325 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-19 02:53:09,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 02:53:09,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:09,326 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:09,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 02:53:09,326 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:09,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:09,327 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-19 02:53:09,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:09,327 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043236034] [2020-08-19 02:53:09,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:09,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:09,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 02:53:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 02:53:09,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:09,752 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:09,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043236034] [2020-08-19 02:53:09,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:09,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 02:53:09,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654698266] [2020-08-19 02:53:09,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 02:53:09,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:09,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 02:53:09,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-19 02:53:09,755 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-19 02:53:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:11,306 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-19 02:53:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 02:53:11,306 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-19 02:53:11,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:11,310 INFO L225 Difference]: With dead ends: 614 [2020-08-19 02:53:11,310 INFO L226 Difference]: Without dead ends: 564 [2020-08-19 02:53:11,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:53:11,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-19 02:53:11,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-19 02:53:11,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 02:53:11,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-19 02:53:11,323 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-19 02:53:11,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:11,324 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-19 02:53:11,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 02:53:11,324 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-19 02:53:11,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 02:53:11,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:11,325 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:11,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 02:53:11,325 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:11,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:11,326 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-19 02:53:11,326 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:11,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864737393] [2020-08-19 02:53:11,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:11,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:11,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:11,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:11,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 02:53:11,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:11,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 02:53:11,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:11,767 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:11,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864737393] [2020-08-19 02:53:11,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:11,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 02:53:11,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220962555] [2020-08-19 02:53:11,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 02:53:11,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:11,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 02:53:11,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-19 02:53:11,770 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-19 02:53:13,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:13,402 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-19 02:53:13,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-19 02:53:13,403 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-19 02:53:13,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:13,406 INFO L225 Difference]: With dead ends: 637 [2020-08-19 02:53:13,407 INFO L226 Difference]: Without dead ends: 587 [2020-08-19 02:53:13,408 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-19 02:53:13,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-19 02:53:13,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-19 02:53:13,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-19 02:53:13,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-19 02:53:13,420 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-19 02:53:13,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:13,421 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-19 02:53:13,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 02:53:13,421 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-19 02:53:13,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-19 02:53:13,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:13,422 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:13,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 02:53:13,423 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:13,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:13,423 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-19 02:53:13,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:13,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219090601] [2020-08-19 02:53:13,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:13,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:13,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:13,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 02:53:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:13,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:53:13,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:13,855 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:13,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219090601] [2020-08-19 02:53:13,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:13,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-19 02:53:13,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213922948] [2020-08-19 02:53:13,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-19 02:53:13,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:13,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-19 02:53:13,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-19 02:53:13,858 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-19 02:53:15,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:15,678 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-19 02:53:15,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-19 02:53:15,678 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-19 02:53:15,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:15,681 INFO L225 Difference]: With dead ends: 660 [2020-08-19 02:53:15,682 INFO L226 Difference]: Without dead ends: 610 [2020-08-19 02:53:15,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:53:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-19 02:53:15,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-19 02:53:15,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-19 02:53:15,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-19 02:53:15,695 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-19 02:53:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:15,696 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-19 02:53:15,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-19 02:53:15,696 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-19 02:53:15,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 02:53:15,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:15,697 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:15,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 02:53:15,697 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:15,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:15,698 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-19 02:53:15,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:15,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970218034] [2020-08-19 02:53:15,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:15,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 02:53:16,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:53:16,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:16,163 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:16,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970218034] [2020-08-19 02:53:16,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:16,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-19 02:53:16,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627104845] [2020-08-19 02:53:16,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-19 02:53:16,165 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:16,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-19 02:53:16,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-19 02:53:16,166 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-19 02:53:18,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:18,241 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-19 02:53:18,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-19 02:53:18,242 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-19 02:53:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:18,247 INFO L225 Difference]: With dead ends: 683 [2020-08-19 02:53:18,248 INFO L226 Difference]: Without dead ends: 633 [2020-08-19 02:53:18,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-19 02:53:18,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-19 02:53:18,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-19 02:53:18,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 02:53:18,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-19 02:53:18,269 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-19 02:53:18,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:18,270 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-19 02:53:18,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-19 02:53:18,270 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-19 02:53:18,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 02:53:18,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:18,272 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:18,272 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 02:53:18,273 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:18,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:18,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-19 02:53:18,273 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:18,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205336460] [2020-08-19 02:53:18,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 02:53:18,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 02:53:18,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:18,947 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:18,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205336460] [2020-08-19 02:53:18,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:18,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-19 02:53:18,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736986504] [2020-08-19 02:53:18,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-19 02:53:18,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:18,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-19 02:53:18,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-19 02:53:18,950 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-19 02:53:21,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:21,737 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-19 02:53:21,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-19 02:53:21,739 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-19 02:53:21,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:21,744 INFO L225 Difference]: With dead ends: 706 [2020-08-19 02:53:21,744 INFO L226 Difference]: Without dead ends: 656 [2020-08-19 02:53:21,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-19 02:53:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-19 02:53:21,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-19 02:53:21,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-19 02:53:21,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-19 02:53:21,766 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-19 02:53:21,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:21,767 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-19 02:53:21,767 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-19 02:53:21,767 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-19 02:53:21,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-19 02:53:21,768 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:21,769 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:21,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 02:53:21,769 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:21,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:21,771 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-19 02:53:21,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:21,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633880093] [2020-08-19 02:53:21,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 02:53:22,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:53:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:22,357 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:22,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1633880093] [2020-08-19 02:53:22,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:22,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-19 02:53:22,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200848703] [2020-08-19 02:53:22,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-19 02:53:22,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-19 02:53:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-19 02:53:22,360 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-19 02:53:24,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:24,537 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-19 02:53:24,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-19 02:53:24,538 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-19 02:53:24,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:24,541 INFO L225 Difference]: With dead ends: 729 [2020-08-19 02:53:24,542 INFO L226 Difference]: Without dead ends: 679 [2020-08-19 02:53:24,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-19 02:53:24,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-19 02:53:24,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-19 02:53:24,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-19 02:53:24,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-19 02:53:24,554 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-19 02:53:24,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:24,554 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-19 02:53:24,554 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-19 02:53:24,554 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-19 02:53:24,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 02:53:24,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:24,555 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:24,556 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 02:53:24,556 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:24,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:24,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-19 02:53:24,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:24,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1557474615] [2020-08-19 02:53:24,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:24,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:25,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:25,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:25,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 02:53:25,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:25,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 02:53:25,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-19 02:53:25,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1557474615] [2020-08-19 02:53:25,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:25,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-19 02:53:25,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132226116] [2020-08-19 02:53:25,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-19 02:53:25,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:25,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-19 02:53:25,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-19 02:53:25,105 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-19 02:53:26,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:26,975 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-19 02:53:26,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-19 02:53:26,975 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-19 02:53:26,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:26,979 INFO L225 Difference]: With dead ends: 752 [2020-08-19 02:53:26,979 INFO L226 Difference]: Without dead ends: 702 [2020-08-19 02:53:26,982 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-19 02:53:26,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-19 02:53:26,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-19 02:53:26,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 02:53:26,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-19 02:53:26,995 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-19 02:53:26,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:26,996 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-19 02:53:26,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-19 02:53:26,996 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-19 02:53:26,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 02:53:26,997 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:26,997 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:26,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 02:53:26,998 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:26,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:26,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-19 02:53:26,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:26,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950787364] [2020-08-19 02:53:26,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:27,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 02:53:27,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 02:53:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,080 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-19 02:53:27,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950787364] [2020-08-19 02:53:27,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:27,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-19 02:53:27,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378986762] [2020-08-19 02:53:27,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 02:53:27,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:27,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 02:53:27,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-19 02:53:27,085 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-19 02:53:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:27,217 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-19 02:53:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 02:53:27,217 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-19 02:53:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:27,219 INFO L225 Difference]: With dead ends: 177 [2020-08-19 02:53:27,219 INFO L226 Difference]: Without dead ends: 132 [2020-08-19 02:53:27,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-19 02:53:27,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-19 02:53:27,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 02:53:27,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-19 02:53:27,225 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-19 02:53:27,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:27,225 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-19 02:53:27,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 02:53:27,226 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-19 02:53:27,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 02:53:27,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:27,227 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:27,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 02:53:27,227 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:27,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:27,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-19 02:53:27,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:27,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1153731364] [2020-08-19 02:53:27,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:27,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 02:53:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 02:53:27,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-19 02:53:27,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1153731364] [2020-08-19 02:53:27,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 02:53:27,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 02:53:27,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449212248] [2020-08-19 02:53:27,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:53:27,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:27,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:53:27,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:27,309 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-19 02:53:27,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:27,479 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-19 02:53:27,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:27,479 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-19 02:53:27,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:27,480 INFO L225 Difference]: With dead ends: 200 [2020-08-19 02:53:27,481 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 02:53:27,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:27,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 02:53:27,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-19 02:53:27,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 02:53:27,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-19 02:53:27,487 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-19 02:53:27,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:27,488 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-19 02:53:27,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:53:27,488 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-19 02:53:27,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 02:53:27,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:27,489 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:27,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 02:53:27,490 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:27,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:27,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-19 02:53:27,491 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:27,491 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435433811] [2020-08-19 02:53:27,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:27,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:27,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:53:27,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 02:53:27,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-19 02:53:27,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435433811] [2020-08-19 02:53:27,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:27,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 02:53:27,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706578317] [2020-08-19 02:53:27,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 02:53:27,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:27,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 02:53:27,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 02:53:27,604 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-19 02:53:27,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:27,766 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-19 02:53:27,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 02:53:27,766 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-19 02:53:27,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:27,767 INFO L225 Difference]: With dead ends: 187 [2020-08-19 02:53:27,767 INFO L226 Difference]: Without dead ends: 139 [2020-08-19 02:53:27,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-19 02:53:27,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-19 02:53:27,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-19 02:53:27,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 02:53:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-19 02:53:27,778 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-19 02:53:27,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:27,779 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-19 02:53:27,779 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 02:53:27,779 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-19 02:53:27,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-19 02:53:27,780 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 02:53:27,780 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 02:53:27,781 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 02:53:27,781 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 02:53:27,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 02:53:27,781 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-19 02:53:27,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 02:53:27,782 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422094509] [2020-08-19 02:53:27,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 02:53:27,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 02:53:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 02:53:27,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 02:53:27,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 02:53:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-19 02:53:27,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422094509] [2020-08-19 02:53:27,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 02:53:27,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-19 02:53:27,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400464112] [2020-08-19 02:53:27,901 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 02:53:27,901 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 02:53:27,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 02:53:27,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-19 02:53:27,902 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-19 02:53:28,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 02:53:28,038 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-19 02:53:28,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 02:53:28,038 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-19 02:53:28,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 02:53:28,039 INFO L225 Difference]: With dead ends: 157 [2020-08-19 02:53:28,039 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 02:53:28,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 02:53:28,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 02:53:28,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 02:53:28,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 02:53:28,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 02:53:28,041 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-19 02:53:28,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 02:53:28,041 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 02:53:28,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 02:53:28,041 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 02:53:28,041 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 02:53:28,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 02:53:28,044 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 02:53:28,371 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-19 02:53:28,371 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-19 02:53:28,371 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-19 02:53:28,371 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-19 02:53:28,371 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-19 02:53:28,371 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-19 02:53:28,372 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-19 02:53:28,372 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:53:28,372 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-19 02:53:28,372 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:53:28,372 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-19 02:53:28,372 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-19 02:53:28,372 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-19 02:53:28,373 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-19 02:53:28,373 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-19 02:53:28,373 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-19 02:53:28,373 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-19 02:53:28,373 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-19 02:53:28,374 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-19 02:53:28,374 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-19 02:53:28,374 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-19 02:53:28,376 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,376 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-19 02:53:28,377 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,377 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-19 02:53:28,377 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-19 02:53:28,377 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,379 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-19 02:53:28,379 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-19 02:53:28,379 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-19 02:53:28,379 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-19 02:53:28,379 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-19 02:53:28,379 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-19 02:53:28,379 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-19 02:53:28,380 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-19 02:53:28,380 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-19 02:53:28,380 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-19 02:53:28,380 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-19 02:53:28,380 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-19 02:53:28,380 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-19 02:53:28,380 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-19 02:53:28,382 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-19 02:53:28,382 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,382 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-19 02:53:28,382 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,382 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-19 02:53:28,383 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-19 02:53:28,383 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-19 02:53:28,383 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-19 02:53:28,384 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-19 02:53:28,384 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-19 02:53:28,384 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-19 02:53:28,384 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-19 02:53:28,384 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-19 02:53:28,384 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-19 02:53:28,385 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-19 02:53:28,386 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-19 02:53:28,386 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-19 02:53:28,386 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-19 02:53:28,386 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-19 02:53:28,387 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-19 02:53:28,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.08 02:53:28 BoogieIcfgContainer [2020-08-19 02:53:28,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-19 02:53:28,427 INFO L168 Benchmark]: Toolchain (without parser) took 41636.86 ms. Allocated memory was 138.9 MB in the beginning and 472.9 MB in the end (delta: 334.0 MB). Free memory was 101.7 MB in the beginning and 153.0 MB in the end (delta: -51.3 MB). Peak memory consumption was 282.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:28,427 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-19 02:53:28,428 INFO L168 Benchmark]: CACSL2BoogieTranslator took 372.95 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.5 MB in the beginning and 180.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:28,428 INFO L168 Benchmark]: Boogie Preprocessor took 43.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 177.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:28,428 INFO L168 Benchmark]: RCFGBuilder took 486.25 ms. Allocated memory is still 201.9 MB. Free memory was 177.7 MB in the beginning and 153.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:28,429 INFO L168 Benchmark]: TraceAbstraction took 40730.08 ms. Allocated memory was 201.9 MB in the beginning and 472.9 MB in the end (delta: 271.1 MB). Free memory was 153.9 MB in the beginning and 153.0 MB in the end (delta: 850.5 kB). Peak memory consumption was 271.9 MB. Max. memory is 7.1 GB. [2020-08-19 02:53:28,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 138.9 MB. Free memory was 120.5 MB in the beginning and 120.3 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 372.95 ms. Allocated memory was 138.9 MB in the beginning and 201.9 MB in the end (delta: 62.9 MB). Free memory was 101.5 MB in the beginning and 180.3 MB in the end (delta: -78.8 MB). Peak memory consumption was 22.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 43.09 ms. Allocated memory is still 201.9 MB. Free memory was 180.3 MB in the beginning and 177.7 MB in the end (delta: 2.7 MB). Peak memory consumption was 2.7 MB. Max. memory is 7.1 GB. * RCFGBuilder took 486.25 ms. Allocated memory is still 201.9 MB. Free memory was 177.7 MB in the beginning and 153.9 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 40730.08 ms. Allocated memory was 201.9 MB in the beginning and 472.9 MB in the end (delta: 271.1 MB). Free memory was 153.9 MB in the beginning and 153.0 MB in the end (delta: 850.5 kB). Peak memory consumption was 271.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: 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: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 40.2s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 31.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 21.2s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.3s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 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...