/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=0.2 -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 [2020-08-18 23:38:20,905 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:38:20,909 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:38:20,947 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:38:20,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:38:20,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:38:20,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:38:20,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:38:20,953 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:38:20,954 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:38:20,955 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:38:20,956 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:38:20,957 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:38:20,958 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:38:20,959 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:38:20,960 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:38:20,961 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:38:20,962 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:38:20,963 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:38:20,965 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:38:20,966 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:38:20,967 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:38:20,969 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:38:20,969 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:38:20,972 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:38:20,972 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:38:20,972 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:38:20,973 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:38:20,974 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:38:20,974 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-18 23:38:20,979 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:38:20,980 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:38:20,981 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:38:20,982 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:38:21,004 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:38:21,004 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:38:21,006 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:38:21,006 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:38:21,006 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:38:21,006 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:38:21,007 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:38:21,007 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:38:21,007 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:38:21,007 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:38:21,007 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:38:21,008 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:38:21,009 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:38:21,009 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:38:21,009 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:38:21,009 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:38:21,010 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:38:21,010 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:38:21,010 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:38:21,010 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:38:21,010 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:38:21,011 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:38:21,011 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:38:21,011 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:38:21,011 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=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:38:21,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:38:21,333 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:38:21,336 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:38:21,338 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:38:21,338 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:38:21,339 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 23:38:21,421 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0845fd97/10715963d3484df09eb7ef56d2ea5517/FLAGa1ac41211 [2020-08-18 23:38:21,922 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:38:21,922 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 23:38:21,931 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0845fd97/10715963d3484df09eb7ef56d2ea5517/FLAGa1ac41211 [2020-08-18 23:38:22,269 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f0845fd97/10715963d3484df09eb7ef56d2ea5517 [2020-08-18 23:38:22,279 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:38:22,281 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:38:22,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:38:22,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:38:22,286 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:38:22,287 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,290 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@57c5cb56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22, skipping insertion in model container [2020-08-18 23:38:22,290 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,298 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:38:22,319 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:38:22,561 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:38:22,571 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:38:22,600 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:38:22,727 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:38:22,728 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22 WrapperNode [2020-08-18 23:38:22,728 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:38:22,729 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:38:22,729 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:38:22,729 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:38:22,743 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,755 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,766 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,775 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,777 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... [2020-08-18 23:38:22,781 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:38:22,781 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:38:22,782 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:38:22,782 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:38:22,783 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:38:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:38:22,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:38:22,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:38:22,854 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-18 23:38:22,854 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-18 23:38:22,854 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:38:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:38:22,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 23:38:22,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:38:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 23:38:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 23:38:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:38:22,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:38:23,284 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:38:23,285 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 23:38:23,289 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:38:23 BoogieIcfgContainer [2020-08-18 23:38:23,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:38:23,291 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:38:23,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:38:23,294 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:38:23,294 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:38:22" (1/3) ... [2020-08-18 23:38:23,295 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa679d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:38:23, skipping insertion in model container [2020-08-18 23:38:23,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:38:22" (2/3) ... [2020-08-18 23:38:23,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@32aa679d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 11:38:23, skipping insertion in model container [2020-08-18 23:38:23,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:38:23" (3/3) ... [2020-08-18 23:38:23,297 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-18 23:38:23,308 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:38:23,315 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:38:23,327 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:38:23,350 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:38:23,350 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:38:23,350 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:38:23,350 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:38:23,351 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:38:23,351 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:38:23,351 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:38:23,351 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:38:23,371 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 23:38:23,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 23:38:23,378 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:23,380 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:23,380 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:23,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:23,386 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-18 23:38:23,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:23,397 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184286891] [2020-08-18 23:38:23,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:23,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:23,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:23,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:23,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184286891] [2020-08-18 23:38:23,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:38:23,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:38:23,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116532160] [2020-08-18 23:38:23,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:38:23,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:23,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:38:23,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:38:23,656 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 23:38:23,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:23,971 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-18 23:38:23,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:38:23,973 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 23:38:23,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:23,985 INFO L225 Difference]: With dead ends: 150 [2020-08-18 23:38:23,986 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 23:38:23,990 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 [2020-08-18 23:38:24,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 23:38:24,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-18 23:38:24,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 23:38:24,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-18 23:38:24,047 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-18 23:38:24,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:24,048 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-18 23:38:24,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:38:24,048 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-18 23:38:24,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 23:38:24,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:24,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:24,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:38:24,050 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:24,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:24,051 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-18 23:38:24,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:24,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552551574] [2020-08-18 23:38:24,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:24,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:24,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:24,127 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:24,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552551574] [2020-08-18 23:38:24,128 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:24,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:38:24,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791484480] [2020-08-18 23:38:24,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:38:24,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:24,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:38:24,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:38:24,132 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-18 23:38:24,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:24,500 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-18 23:38:24,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:38:24,501 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 23:38:24,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:24,503 INFO L225 Difference]: With dead ends: 170 [2020-08-18 23:38:24,503 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 23:38:24,507 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 [2020-08-18 23:38:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 23:38:24,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-18 23:38:24,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 23:38:24,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-18 23:38:24,534 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-18 23:38:24,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:24,534 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-18 23:38:24,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:38:24,535 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-18 23:38:24,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 23:38:24,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:24,536 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:24,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:38:24,538 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:24,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:24,538 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-18 23:38:24,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:24,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292650654] [2020-08-18 23:38:24,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:24,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:24,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:24,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:24,650 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:24,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292650654] [2020-08-18 23:38:24,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:24,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 23:38:24,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733072337] [2020-08-18 23:38:24,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:38:24,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:24,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:38:24,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:38:24,653 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-18 23:38:24,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:24,952 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-18 23:38:24,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:38:24,953 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 23:38:24,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:24,956 INFO L225 Difference]: With dead ends: 203 [2020-08-18 23:38:24,956 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 23:38:24,957 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 [2020-08-18 23:38:24,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 23:38:24,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-18 23:38:24,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 23:38:24,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-18 23:38:24,971 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-18 23:38:24,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:24,971 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-18 23:38:24,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:38:24,972 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-18 23:38:24,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 23:38:24,972 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:24,976 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:24,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:38:24,977 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:24,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:24,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-18 23:38:24,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:24,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297643016] [2020-08-18 23:38:24,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:25,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:25,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297643016] [2020-08-18 23:38:25,069 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:25,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:38:25,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818343027] [2020-08-18 23:38:25,070 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:38:25,070 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:25,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:38:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:38:25,071 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-18 23:38:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:25,440 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-18 23:38:25,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:38:25,441 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 23:38:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:25,443 INFO L225 Difference]: With dead ends: 236 [2020-08-18 23:38:25,445 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 23:38:25,446 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 [2020-08-18 23:38:25,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 23:38:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-18 23:38:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 23:38:25,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-18 23:38:25,473 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-18 23:38:25,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:25,473 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-18 23:38:25,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:38:25,475 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-18 23:38:25,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 23:38:25,476 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:25,476 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:38:25,477 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:38:25,478 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:25,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:25,478 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-18 23:38:25,478 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:25,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [548985077] [2020-08-18 23:38:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:25,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 23:38:25,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [548985077] [2020-08-18 23:38:25,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:38:25,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:38:25,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260488690] [2020-08-18 23:38:25,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:38:25,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:25,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:38:25,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:38:25,588 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-18 23:38:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:25,711 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-18 23:38:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:38:25,712 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 23:38:25,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:25,713 INFO L225 Difference]: With dead ends: 116 [2020-08-18 23:38:25,713 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 23:38:25,714 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 [2020-08-18 23:38:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 23:38:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-18 23:38:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 23:38:25,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-18 23:38:25,722 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-18 23:38:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:25,722 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-18 23:38:25,722 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:38:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-18 23:38:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 23:38:25,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:25,724 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] [2020-08-18 23:38:25,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:38:25,725 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:25,725 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-18 23:38:25,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:25,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201344695] [2020-08-18 23:38:25,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:25,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:25,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 23:38:25,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 23:38:25,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:25,829 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:25,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201344695] [2020-08-18 23:38:25,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:25,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:38:25,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021173478] [2020-08-18 23:38:25,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:38:25,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:25,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:38:25,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:38:25,832 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-18 23:38:26,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:26,231 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-18 23:38:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:38:26,232 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-18 23:38:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:26,234 INFO L225 Difference]: With dead ends: 223 [2020-08-18 23:38:26,234 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 23:38:26,235 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 [2020-08-18 23:38:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 23:38:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-18 23:38:26,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 23:38:26,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-18 23:38:26,246 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-18 23:38:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:26,246 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-18 23:38:26,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:38:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-18 23:38:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 23:38:26,248 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:26,248 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] [2020-08-18 23:38:26,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:38:26,249 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:26,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:26,249 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-18 23:38:26,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:26,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [181899381] [2020-08-18 23:38:26,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:26,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 23:38:26,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 23:38:26,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:26,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [181899381] [2020-08-18 23:38:26,372 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:26,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:38:26,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288784776] [2020-08-18 23:38:26,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:38:26,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:26,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:38:26,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:38:26,374 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-18 23:38:26,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:26,848 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-18 23:38:26,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 23:38:26,849 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 23:38:26,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:26,851 INFO L225 Difference]: With dead ends: 246 [2020-08-18 23:38:26,851 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 23:38:26,852 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 [2020-08-18 23:38:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 23:38:26,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-18 23:38:26,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 23:38:26,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-18 23:38:26,864 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-18 23:38:26,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:26,864 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-18 23:38:26,864 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:38:26,864 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-18 23:38:26,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 23:38:26,866 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:26,866 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] [2020-08-18 23:38:26,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:38:26,867 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:26,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:26,867 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-18 23:38:26,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:26,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936251315] [2020-08-18 23:38:26,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:26,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 23:38:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:38:26,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:26,981 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:26,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936251315] [2020-08-18 23:38:26,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:26,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:38:26,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997349853] [2020-08-18 23:38:26,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:38:26,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:26,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:38:26,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:38:26,984 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-18 23:38:27,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:27,479 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-18 23:38:27,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:38:27,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 23:38:27,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:27,483 INFO L225 Difference]: With dead ends: 269 [2020-08-18 23:38:27,483 INFO L226 Difference]: Without dead ends: 219 [2020-08-18 23:38:27,484 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 [2020-08-18 23:38:27,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-18 23:38:27,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-18 23:38:27,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 23:38:27,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-18 23:38:27,512 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-18 23:38:27,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:27,513 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-18 23:38:27,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:38:27,513 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-18 23:38:27,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 23:38:27,515 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:27,515 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] [2020-08-18 23:38:27,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:38:27,515 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:27,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:27,516 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-18 23:38:27,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:27,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382903773] [2020-08-18 23:38:27,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:27,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:38:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:38:27,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:27,681 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:27,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382903773] [2020-08-18 23:38:27,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:27,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:38:27,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968168267] [2020-08-18 23:38:27,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:38:27,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:27,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:38:27,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:38:27,687 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-18 23:38:28,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:28,265 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-18 23:38:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:38:28,266 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-18 23:38:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:28,270 INFO L225 Difference]: With dead ends: 292 [2020-08-18 23:38:28,270 INFO L226 Difference]: Without dead ends: 242 [2020-08-18 23:38:28,271 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 [2020-08-18 23:38:28,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-18 23:38:28,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-18 23:38:28,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 23:38:28,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-18 23:38:28,282 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-18 23:38:28,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:28,282 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-18 23:38:28,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:38:28,283 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-18 23:38:28,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 23:38:28,284 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:28,284 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] [2020-08-18 23:38:28,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:38:28,285 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:28,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:28,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-18 23:38:28,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:28,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [302973131] [2020-08-18 23:38:28,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:28,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 23:38:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:38:28,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:28,454 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:28,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [302973131] [2020-08-18 23:38:28,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:28,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:38:28,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502547204] [2020-08-18 23:38:28,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:38:28,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:28,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:38:28,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:38:28,458 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-18 23:38:29,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:29,090 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-18 23:38:29,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:38:29,091 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-18 23:38:29,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:29,094 INFO L225 Difference]: With dead ends: 315 [2020-08-18 23:38:29,094 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 23:38:29,095 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 [2020-08-18 23:38:29,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 23:38:29,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-18 23:38:29,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 23:38:29,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-18 23:38:29,104 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-18 23:38:29,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:29,105 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-18 23:38:29,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:38:29,105 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-18 23:38:29,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 23:38:29,106 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:29,106 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] [2020-08-18 23:38:29,106 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:38:29,107 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:29,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:29,107 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-18 23:38:29,107 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:29,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141114796] [2020-08-18 23:38:29,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:29,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:29,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 23:38:29,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:29,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:38:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:29,277 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:29,278 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141114796] [2020-08-18 23:38:29,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:29,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:38:29,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734061567] [2020-08-18 23:38:29,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:38:29,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:29,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:38:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:38:29,280 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-18 23:38:29,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:29,899 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-18 23:38:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 23:38:29,899 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-18 23:38:29,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:29,902 INFO L225 Difference]: With dead ends: 338 [2020-08-18 23:38:29,902 INFO L226 Difference]: Without dead ends: 288 [2020-08-18 23:38:29,903 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 [2020-08-18 23:38:29,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-18 23:38:29,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-18 23:38:29,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 23:38:29,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-18 23:38:29,913 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-18 23:38:29,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:29,913 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-18 23:38:29,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:38:29,913 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-18 23:38:29,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 23:38:29,914 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:29,915 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] [2020-08-18 23:38:29,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:38:29,915 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:29,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:29,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-18 23:38:29,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:29,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1392410508] [2020-08-18 23:38:29,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:29,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:30,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:30,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:30,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:38:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:30,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:38:30,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:30,099 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:30,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1392410508] [2020-08-18 23:38:30,100 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:30,100 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 23:38:30,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948377827] [2020-08-18 23:38:30,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 23:38:30,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 23:38:30,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:38:30,103 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-18 23:38:30,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:30,966 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-18 23:38:30,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:38:30,967 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 23:38:30,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:30,970 INFO L225 Difference]: With dead ends: 361 [2020-08-18 23:38:30,970 INFO L226 Difference]: Without dead ends: 311 [2020-08-18 23:38:30,972 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 [2020-08-18 23:38:30,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-18 23:38:30,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-18 23:38:30,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 23:38:30,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-18 23:38:30,984 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-18 23:38:30,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:30,986 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-18 23:38:30,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 23:38:30,986 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-18 23:38:30,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 23:38:30,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:30,988 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] [2020-08-18 23:38:30,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:38:30,988 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:30,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:30,989 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-18 23:38:30,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:30,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249559248] [2020-08-18 23:38:30,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:31,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:31,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:31,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:31,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:38:31,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:31,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:38:31,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:31,236 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:31,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249559248] [2020-08-18 23:38:31,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:31,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 23:38:31,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694489894] [2020-08-18 23:38:31,237 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 23:38:31,237 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:31,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 23:38:31,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:38:31,238 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-18 23:38:32,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:32,072 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-18 23:38:32,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 23:38:32,072 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-18 23:38:32,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:32,075 INFO L225 Difference]: With dead ends: 384 [2020-08-18 23:38:32,075 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 23:38:32,077 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 [2020-08-18 23:38:32,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 23:38:32,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-18 23:38:32,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 23:38:32,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-18 23:38:32,087 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-18 23:38:32,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:32,087 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-18 23:38:32,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 23:38:32,087 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-18 23:38:32,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 23:38:32,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:32,089 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] [2020-08-18 23:38:32,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:38:32,090 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:32,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:32,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-18 23:38:32,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:32,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783537376] [2020-08-18 23:38:32,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:32,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:32,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:32,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:38:32,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:32,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:38:32,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:32,376 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:32,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783537376] [2020-08-18 23:38:32,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:32,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:38:32,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844626072] [2020-08-18 23:38:32,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:38:32,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:32,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:38:32,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:38:32,379 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-18 23:38:33,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:33,189 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-18 23:38:33,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 23:38:33,190 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-18 23:38:33,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:33,194 INFO L225 Difference]: With dead ends: 407 [2020-08-18 23:38:33,194 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 23:38:33,196 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:38:33,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 23:38:33,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-18 23:38:33,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 23:38:33,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-18 23:38:33,208 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-18 23:38:33,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:33,208 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-18 23:38:33,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:38:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-18 23:38:33,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 23:38:33,210 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:33,210 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] [2020-08-18 23:38:33,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:38:33,211 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:33,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:33,211 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-18 23:38:33,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:33,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569937593] [2020-08-18 23:38:33,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:33,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:33,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:33,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:38:33,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:33,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 23:38:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:33,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569937593] [2020-08-18 23:38:33,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:33,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 23:38:33,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071099402] [2020-08-18 23:38:33,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 23:38:33,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 23:38:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:38:33,486 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-18 23:38:34,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:34,458 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-18 23:38:34,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 23:38:34,459 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-18 23:38:34,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:34,465 INFO L225 Difference]: With dead ends: 430 [2020-08-18 23:38:34,465 INFO L226 Difference]: Without dead ends: 380 [2020-08-18 23:38:34,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:38:34,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-18 23:38:34,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-18 23:38:34,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 23:38:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-18 23:38:34,484 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-18 23:38:34,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:34,485 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-18 23:38:34,485 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 23:38:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-18 23:38:34,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 23:38:34,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:34,486 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] [2020-08-18 23:38:34,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:38:34,486 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:34,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:34,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-18 23:38:34,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:34,488 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452274571] [2020-08-18 23:38:34,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:34,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:34,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:34,718 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:38:34,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:34,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:38:34,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:34,742 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:34,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452274571] [2020-08-18 23:38:34,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:34,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 23:38:34,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936503863] [2020-08-18 23:38:34,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 23:38:34,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:34,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 23:38:34,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:38:34,748 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-18 23:38:35,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:35,732 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-18 23:38:35,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:38:35,733 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-18 23:38:35,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:35,736 INFO L225 Difference]: With dead ends: 453 [2020-08-18 23:38:35,736 INFO L226 Difference]: Without dead ends: 403 [2020-08-18 23:38:35,737 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 [2020-08-18 23:38:35,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-18 23:38:35,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-18 23:38:35,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 23:38:35,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-18 23:38:35,750 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-18 23:38:35,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:35,752 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-18 23:38:35,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 23:38:35,752 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-18 23:38:35,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 23:38:35,753 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:35,753 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] [2020-08-18 23:38:35,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:38:35,754 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:35,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:35,754 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-18 23:38:35,754 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:35,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870158092] [2020-08-18 23:38:35,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:35,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:35,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:35,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:38:35,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:35,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 23:38:35,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:36,002 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:36,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870158092] [2020-08-18 23:38:36,002 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:36,002 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:38:36,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601712400] [2020-08-18 23:38:36,003 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:38:36,003 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:36,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:38:36,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:38:36,004 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-18 23:38:36,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:36,896 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-18 23:38:36,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 23:38:36,897 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-18 23:38:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:36,900 INFO L225 Difference]: With dead ends: 476 [2020-08-18 23:38:36,900 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 23:38:36,901 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 [2020-08-18 23:38:36,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 23:38:36,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-18 23:38:36,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 23:38:36,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-18 23:38:36,912 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-18 23:38:36,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:36,912 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-18 23:38:36,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:38:36,913 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-18 23:38:36,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 23:38:36,913 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:36,914 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] [2020-08-18 23:38:36,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:38:36,914 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:36,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:36,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-18 23:38:36,915 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:36,915 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901378845] [2020-08-18 23:38:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:36,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:37,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:37,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:37,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:38:37,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:37,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 23:38:37,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:37,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901378845] [2020-08-18 23:38:37,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:37,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 23:38:37,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972754281] [2020-08-18 23:38:37,182 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 23:38:37,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:37,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 23:38:37,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:38:37,183 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-18 23:38:38,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:38,299 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-18 23:38:38,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 23:38:38,299 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-18 23:38:38,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:38,305 INFO L225 Difference]: With dead ends: 499 [2020-08-18 23:38:38,306 INFO L226 Difference]: Without dead ends: 449 [2020-08-18 23:38:38,307 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 [2020-08-18 23:38:38,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-18 23:38:38,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-18 23:38:38,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 23:38:38,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-18 23:38:38,317 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-18 23:38:38,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:38,317 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-18 23:38:38,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 23:38:38,318 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-18 23:38:38,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 23:38:38,318 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:38,318 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] [2020-08-18 23:38:38,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:38:38,319 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:38,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:38,319 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-18 23:38:38,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:38,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980180629] [2020-08-18 23:38:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:38,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:38,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:38,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 23:38:38,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:38,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:38:38,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:38,611 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:38,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980180629] [2020-08-18 23:38:38,612 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:38,612 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 23:38:38,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911731366] [2020-08-18 23:38:38,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 23:38:38,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:38,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 23:38:38,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:38:38,613 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-18 23:38:39,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:39,880 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-18 23:38:39,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 23:38:39,880 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-18 23:38:39,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:39,885 INFO L225 Difference]: With dead ends: 522 [2020-08-18 23:38:39,885 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 23:38:39,886 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 [2020-08-18 23:38:39,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 23:38:39,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-18 23:38:39,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 23:38:39,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-18 23:38:39,900 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-18 23:38:39,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:39,901 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-18 23:38:39,901 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 23:38:39,901 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-18 23:38:39,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 23:38:39,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:39,902 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] [2020-08-18 23:38:39,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:38:39,903 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:39,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:39,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-18 23:38:39,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:39,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754876893] [2020-08-18 23:38:39,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:39,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:40,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:38:40,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:40,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 23:38:40,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:40,183 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:40,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754876893] [2020-08-18 23:38:40,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:40,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 23:38:40,184 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620889063] [2020-08-18 23:38:40,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 23:38:40,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:40,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 23:38:40,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:38:40,187 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-18 23:38:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:41,528 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-18 23:38:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:38:41,528 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-18 23:38:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:41,531 INFO L225 Difference]: With dead ends: 545 [2020-08-18 23:38:41,532 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 23:38:41,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:38:41,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 23:38:41,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-18 23:38:41,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 23:38:41,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-18 23:38:41,543 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-18 23:38:41,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:41,544 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-18 23:38:41,544 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 23:38:41,544 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-18 23:38:41,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 23:38:41,545 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:41,545 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] [2020-08-18 23:38:41,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:38:41,545 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:41,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:41,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-18 23:38:41,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:41,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1146180760] [2020-08-18 23:38:41,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:41,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:41,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:41,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 23:38:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:41,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 23:38:41,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:41,866 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:41,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1146180760] [2020-08-18 23:38:41,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:41,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 23:38:41,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691654905] [2020-08-18 23:38:41,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 23:38:41,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:41,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 23:38:41,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 23:38:41,869 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-18 23:38:43,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:43,033 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-18 23:38:43,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 23:38:43,034 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-18 23:38:43,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:43,037 INFO L225 Difference]: With dead ends: 568 [2020-08-18 23:38:43,037 INFO L226 Difference]: Without dead ends: 518 [2020-08-18 23:38:43,038 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:38:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-18 23:38:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-18 23:38:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 23:38:43,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-18 23:38:43,049 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-18 23:38:43,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:43,049 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-18 23:38:43,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 23:38:43,049 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-18 23:38:43,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 23:38:43,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:43,050 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] [2020-08-18 23:38:43,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:38:43,051 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:43,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:43,051 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-18 23:38:43,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:43,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1953428102] [2020-08-18 23:38:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:43,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:43,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:43,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:43,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 23:38:43,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:43,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:38:43,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:43,458 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:43,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1953428102] [2020-08-18 23:38:43,460 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:43,461 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 23:38:43,461 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017366363] [2020-08-18 23:38:43,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 23:38:43,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:43,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 23:38:43,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:38:43,463 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-18 23:38:44,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:44,646 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-18 23:38:44,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 23:38:44,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 23:38:44,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:44,651 INFO L225 Difference]: With dead ends: 591 [2020-08-18 23:38:44,651 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 23:38:44,652 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 [2020-08-18 23:38:44,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 23:38:44,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-18 23:38:44,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 23:38:44,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-18 23:38:44,664 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-18 23:38:44,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:44,664 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-18 23:38:44,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 23:38:44,664 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-18 23:38:44,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 23:38:44,665 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:44,665 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] [2020-08-18 23:38:44,665 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:38:44,665 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:44,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:44,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-18 23:38:44,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:44,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687473231] [2020-08-18 23:38:44,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:44,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:45,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:45,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:38:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:45,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 23:38:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:45,055 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:45,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687473231] [2020-08-18 23:38:45,056 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:45,056 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 23:38:45,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339863395] [2020-08-18 23:38:45,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 23:38:45,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:45,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 23:38:45,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:38:45,057 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-18 23:38:46,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:46,396 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-18 23:38:46,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 23:38:46,397 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-18 23:38:46,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:46,400 INFO L225 Difference]: With dead ends: 614 [2020-08-18 23:38:46,400 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 23:38:46,401 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-18 23:38:46,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 23:38:46,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-18 23:38:46,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 23:38:46,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-18 23:38:46,412 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-18 23:38:46,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:46,413 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-18 23:38:46,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 23:38:46,413 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-18 23:38:46,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 23:38:46,414 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:46,414 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] [2020-08-18 23:38:46,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:38:46,414 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:46,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:46,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-18 23:38:46,415 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:46,415 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194583414] [2020-08-18 23:38:46,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:46,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:46,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:46,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 23:38:46,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:46,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 23:38:46,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:46,799 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:46,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194583414] [2020-08-18 23:38:46,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:46,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 23:38:46,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513020794] [2020-08-18 23:38:46,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 23:38:46,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:46,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 23:38:46,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:38:46,802 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-18 23:38:48,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:48,819 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-18 23:38:48,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 23:38:48,820 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-18 23:38:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:48,825 INFO L225 Difference]: With dead ends: 637 [2020-08-18 23:38:48,825 INFO L226 Difference]: Without dead ends: 587 [2020-08-18 23:38:48,827 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:38:48,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-18 23:38:48,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-18 23:38:48,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 23:38:48,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-18 23:38:48,845 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-18 23:38:48,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:48,846 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-18 23:38:48,846 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 23:38:48,846 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-18 23:38:48,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 23:38:48,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:48,848 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] [2020-08-18 23:38:48,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:38:48,848 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:48,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:48,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-18 23:38:48,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:48,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1950594570] [2020-08-18 23:38:48,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:48,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:49,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:49,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:49,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 23:38:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:49,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:38:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:49,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1950594570] [2020-08-18 23:38:49,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:49,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 23:38:49,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85381872] [2020-08-18 23:38:49,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 23:38:49,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:49,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 23:38:49,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 23:38:49,419 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-18 23:38:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:51,773 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-18 23:38:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 23:38:51,774 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 23:38:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:51,779 INFO L225 Difference]: With dead ends: 660 [2020-08-18 23:38:51,779 INFO L226 Difference]: Without dead ends: 610 [2020-08-18 23:38:51,780 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-18 23:38:51,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-18 23:38:51,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-18 23:38:51,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 23:38:51,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-18 23:38:51,798 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-18 23:38:51,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:51,798 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-18 23:38:51,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 23:38:51,799 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-18 23:38:51,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 23:38:51,800 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:51,800 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] [2020-08-18 23:38:51,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:38:51,801 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:51,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:51,801 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-18 23:38:51,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:51,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443286786] [2020-08-18 23:38:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:51,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:52,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:52,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:52,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:38:52,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:52,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:38:52,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:52,331 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:52,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443286786] [2020-08-18 23:38:52,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:52,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 23:38:52,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792639818] [2020-08-18 23:38:52,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 23:38:52,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:52,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 23:38:52,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 23:38:52,334 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-18 23:38:54,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:54,011 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-18 23:38:54,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 23:38:54,012 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-18 23:38:54,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:54,015 INFO L225 Difference]: With dead ends: 683 [2020-08-18 23:38:54,015 INFO L226 Difference]: Without dead ends: 633 [2020-08-18 23:38:54,016 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 [2020-08-18 23:38:54,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-18 23:38:54,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-18 23:38:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 23:38:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-18 23:38:54,026 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-18 23:38:54,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:54,026 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-18 23:38:54,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 23:38:54,027 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-18 23:38:54,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 23:38:54,028 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:54,028 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] [2020-08-18 23:38:54,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 23:38:54,028 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:54,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:54,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-18 23:38:54,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:54,029 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798715211] [2020-08-18 23:38:54,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:54,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:54,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:54,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:54,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 23:38:54,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:54,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 23:38:54,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:54,510 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:54,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798715211] [2020-08-18 23:38:54,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:54,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 23:38:54,511 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890930590] [2020-08-18 23:38:54,512 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 23:38:54,512 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:54,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 23:38:54,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 23:38:54,513 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-18 23:38:56,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:56,435 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-18 23:38:56,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 23:38:56,436 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-18 23:38:56,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:56,439 INFO L225 Difference]: With dead ends: 706 [2020-08-18 23:38:56,439 INFO L226 Difference]: Without dead ends: 656 [2020-08-18 23:38:56,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-18 23:38:56,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-18 23:38:56,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-18 23:38:56,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 23:38:56,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-18 23:38:56,451 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-18 23:38:56,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:56,451 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-18 23:38:56,451 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 23:38:56,451 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-18 23:38:56,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 23:38:56,452 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:56,452 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] [2020-08-18 23:38:56,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 23:38:56,453 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:56,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:56,453 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-18 23:38:56,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:56,454 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2037356786] [2020-08-18 23:38:56,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:56,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:56,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:56,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:56,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 23:38:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:56,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:38:56,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:56,929 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:56,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2037356786] [2020-08-18 23:38:56,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:56,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 23:38:56,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042139348] [2020-08-18 23:38:56,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 23:38:56,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:56,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 23:38:56,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 23:38:56,932 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-18 23:38:58,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:38:58,991 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-18 23:38:58,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 23:38:58,992 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-18 23:38:58,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:38:58,995 INFO L225 Difference]: With dead ends: 729 [2020-08-18 23:38:58,995 INFO L226 Difference]: Without dead ends: 679 [2020-08-18 23:38:58,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 23:38:58,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-18 23:38:59,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-18 23:38:59,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 23:38:59,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-18 23:38:59,006 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-18 23:38:59,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:38:59,007 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-18 23:38:59,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 23:38:59,007 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-18 23:38:59,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 23:38:59,008 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:38:59,008 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] [2020-08-18 23:38:59,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 23:38:59,008 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:38:59,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:38:59,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-18 23:38:59,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:38:59,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285019553] [2020-08-18 23:38:59,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:38:59,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:59,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:38:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:59,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:38:59,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:59,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 23:38:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:38:59,528 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 23:38:59,529 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285019553] [2020-08-18 23:38:59,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:38:59,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 23:38:59,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635229644] [2020-08-18 23:38:59,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 23:38:59,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:38:59,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 23:38:59,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 23:38:59,532 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-18 23:39:01,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:01,226 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-18 23:39:01,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 23:39:01,227 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-18 23:39:01,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:01,236 INFO L225 Difference]: With dead ends: 752 [2020-08-18 23:39:01,237 INFO L226 Difference]: Without dead ends: 702 [2020-08-18 23:39:01,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-18 23:39:01,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-18 23:39:01,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-18 23:39:01,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 23:39:01,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-18 23:39:01,256 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-18 23:39:01,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:01,257 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-18 23:39:01,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 23:39:01,257 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-18 23:39:01,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 23:39:01,258 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:01,258 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] [2020-08-18 23:39:01,260 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 23:39:01,260 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:01,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:01,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-18 23:39:01,260 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:01,261 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1420129541] [2020-08-18 23:39:01,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:01,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:01,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:39:01,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 23:39:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 23:39:01,337 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1420129541] [2020-08-18 23:39:01,337 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:01,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 23:39:01,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611415316] [2020-08-18 23:39:01,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:39:01,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:01,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:39:01,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:39:01,341 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-18 23:39:01,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:01,480 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-18 23:39:01,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:39:01,481 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-18 23:39:01,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:01,482 INFO L225 Difference]: With dead ends: 177 [2020-08-18 23:39:01,482 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 23:39:01,482 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 [2020-08-18 23:39:01,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 23:39:01,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-18 23:39:01,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 23:39:01,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-18 23:39:01,487 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-18 23:39:01,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:01,488 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-18 23:39:01,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:39:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-18 23:39:01,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 23:39:01,489 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:01,489 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] [2020-08-18 23:39:01,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 23:39:01,490 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:01,490 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-18 23:39:01,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:01,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1872680293] [2020-08-18 23:39:01,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 23:39:01,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 23:39:01,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,560 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 23:39:01,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1872680293] [2020-08-18 23:39:01,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:39:01,561 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 23:39:01,561 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312352429] [2020-08-18 23:39:01,562 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:39:01,562 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:01,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:39:01,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:39:01,562 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-18 23:39:01,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:01,739 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-18 23:39:01,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:39:01,739 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-18 23:39:01,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:01,741 INFO L225 Difference]: With dead ends: 200 [2020-08-18 23:39:01,741 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 23:39:01,741 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 [2020-08-18 23:39:01,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 23:39:01,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-18 23:39:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 23:39:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-18 23:39:01,748 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-18 23:39:01,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:01,748 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-18 23:39:01,748 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:39:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-18 23:39:01,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 23:39:01,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:01,749 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] [2020-08-18 23:39:01,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 23:39:01,750 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:01,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-18 23:39:01,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:01,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526354415] [2020-08-18 23:39:01,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:01,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:39:01,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 23:39:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:01,878 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 23:39:01,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526354415] [2020-08-18 23:39:01,879 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:01,879 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:39:01,879 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946993375] [2020-08-18 23:39:01,880 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:39:01,880 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:01,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:39:01,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:39:01,880 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-18 23:39:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:02,044 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-18 23:39:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:39:02,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-18 23:39:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:02,045 INFO L225 Difference]: With dead ends: 187 [2020-08-18 23:39:02,046 INFO L226 Difference]: Without dead ends: 139 [2020-08-18 23:39:02,046 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 [2020-08-18 23:39:02,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-18 23:39:02,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-18 23:39:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 23:39:02,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-18 23:39:02,060 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-18 23:39:02,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:02,061 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-18 23:39:02,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:39:02,061 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-18 23:39:02,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 23:39:02,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:39:02,062 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] [2020-08-18 23:39:02,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 23:39:02,063 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:39:02,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:39:02,063 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-18 23:39:02,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:39:02,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27592918] [2020-08-18 23:39:02,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:39:02,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:02,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:39:02,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:02,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:39:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:02,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 23:39:02,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:39:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 23:39:02,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27592918] [2020-08-18 23:39:02,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:39:02,172 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 23:39:02,172 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711236476] [2020-08-18 23:39:02,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:39:02,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:39:02,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:39:02,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:39:02,174 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-18 23:39:02,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:39:02,299 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-18 23:39:02,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:39:02,300 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 23:39:02,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:39:02,300 INFO L225 Difference]: With dead ends: 157 [2020-08-18 23:39:02,300 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:39:02,301 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 [2020-08-18 23:39:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:39:02,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:39:02,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:39:02,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:39:02,303 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-18 23:39:02,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:39:02,304 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:39:02,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:39:02,304 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:39:02,304 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:39:02,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 23:39:02,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:39:02,525 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 23:39:02,525 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 23:39:02,525 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-18 23:39:02,525 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-18 23:39:02,525 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-18 23:39:02,526 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|)) [2020-08-18 23:39:02,526 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-18 23:39:02,526 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:39:02,526 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|)) [2020-08-18 23:39:02,526 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:39:02,526 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-18 23:39:02,526 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-18 23:39:02,526 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-18 23:39:02,527 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 23:39:02,527 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 23:39:02,527 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 23:39:02,527 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 23:39:02,527 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-18 23:39:02,527 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-18 23:39:02,527 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-18 23:39:02,527 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-18 23:39:02,528 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,528 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-18 23:39:02,528 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,528 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-18 23:39:02,528 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-18 23:39:02,528 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,528 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-18 23:39:02,528 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-18 23:39:02,529 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-18 23:39:02,529 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-18 23:39:02,529 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-18 23:39:02,529 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-18 23:39:02,529 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-18 23:39:02,529 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-18 23:39:02,529 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-18 23:39:02,529 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-18 23:39:02,529 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-18 23:39:02,529 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-18 23:39:02,530 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-18 23:39:02,531 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-18 23:39:02,532 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-18 23:39:02,532 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-18 23:39:02,532 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-18 23:39:02,550 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 11:39:02 BoogieIcfgContainer [2020-08-18 23:39:02,550 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 23:39:02,552 INFO L168 Benchmark]: Toolchain (without parser) took 40270.72 ms. Allocated memory was 147.3 MB in the beginning and 445.6 MB in the end (delta: 298.3 MB). Free memory was 103.1 MB in the beginning and 283.1 MB in the end (delta: -180.0 MB). Peak memory consumption was 118.4 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:02,553 INFO L168 Benchmark]: CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-18 23:39:02,554 INFO L168 Benchmark]: CACSL2BoogieTranslator took 445.99 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.9 MB in the beginning and 183.3 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:02,554 INFO L168 Benchmark]: Boogie Preprocessor took 52.16 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:02,555 INFO L168 Benchmark]: RCFGBuilder took 508.19 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 156.6 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:02,555 INFO L168 Benchmark]: TraceAbstraction took 39259.53 ms. Allocated memory was 204.5 MB in the beginning and 445.6 MB in the end (delta: 241.2 MB). Free memory was 156.6 MB in the beginning and 283.1 MB in the end (delta: -126.5 MB). Peak memory consumption was 114.7 MB. Max. memory is 7.1 GB. [2020-08-18 23:39:02,559 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.29 ms. Allocated memory is still 147.3 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 445.99 ms. Allocated memory was 147.3 MB in the beginning and 204.5 MB in the end (delta: 57.1 MB). Free memory was 102.9 MB in the beginning and 183.3 MB in the end (delta: -80.4 MB). Peak memory consumption was 20.5 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 52.16 ms. Allocated memory is still 204.5 MB. Free memory was 183.3 MB in the beginning and 181.0 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 508.19 ms. Allocated memory is still 204.5 MB. Free memory was 181.0 MB in the beginning and 156.6 MB in the end (delta: 24.3 MB). Peak memory consumption was 24.3 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39259.53 ms. Allocated memory was 204.5 MB in the beginning and 445.6 MB in the end (delta: 241.2 MB). Free memory was 156.6 MB in the beginning and 283.1 MB in the end (delta: -126.5 MB). Peak memory consumption was 114.7 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: 38.9s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.5s 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, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.1s 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...