/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:22:40,094 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:22:40,097 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:22:40,136 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:22:40,138 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:22:40,146 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:22:40,148 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:22:40,151 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:22:40,153 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:22:40,156 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:22:40,157 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:22:40,158 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:22:40,158 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:22:40,161 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:22:40,163 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:22:40,164 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:22:40,166 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:22:40,167 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:22:40,168 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:22:40,176 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:22:40,178 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:22:40,179 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:22:40,180 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:22:40,180 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:22:40,192 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:22:40,211 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:22:40,211 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:22:40,213 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:22:40,214 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:22:40,249 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:22:40,249 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:22:40,252 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:22:40,252 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:22:40,252 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:22:40,252 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:22:40,253 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:22:40,253 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:22:40,253 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:22:40,253 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:22:40,254 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:22:40,255 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:22:40,255 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:22:40,255 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:22:40,256 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:22:40,256 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:22:40,256 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:22:40,256 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:22:40,256 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:22:40,257 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:22:40,257 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:22:40,257 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:40,257 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:22:40,257 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:22:40,258 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:22:40,258 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:22:40,258 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:22:40,258 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:22:40,258 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:22:40,259 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:22:40,586 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:22:40,604 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:22:40,609 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:22:40,611 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:22:40,611 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:22:40,612 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 01:22:40,674 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1332c6bd4/850357989e4544b3be90ab76ffab2fc8/FLAG8a87c3ce4 [2020-08-22 01:22:41,100 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:22:41,101 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-22 01:22:41,109 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1332c6bd4/850357989e4544b3be90ab76ffab2fc8/FLAG8a87c3ce4 [2020-08-22 01:22:41,502 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1332c6bd4/850357989e4544b3be90ab76ffab2fc8 [2020-08-22 01:22:41,511 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:22:41,513 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:22:41,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:41,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:22:41,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:22:41,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:41" (1/1) ... [2020-08-22 01:22:41,522 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a56ccca and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:41, skipping insertion in model container [2020-08-22 01:22:41,522 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:41" (1/1) ... [2020-08-22 01:22:41,530 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:22:41,579 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:22:41,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:41,882 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:22:42,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:42,036 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:22:42,036 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42 WrapperNode [2020-08-22 01:22:42,036 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:42,037 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:22:42,037 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:22:42,037 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:22:42,055 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,055 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,063 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,063 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,072 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,080 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,082 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,085 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:22:42,086 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:22:42,086 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:22:42,086 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:22:42,087 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:22:42,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:22:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:22:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 01:22:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 01:22:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 01:22:42,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:22:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:22:42,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 01:22:42,149 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:22:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:22:42,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:22:42,661 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:22:42,662 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 01:22:42,667 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:42 BoogieIcfgContainer [2020-08-22 01:22:42,667 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:22:42,669 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:22:42,669 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:22:42,673 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:22:42,673 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:22:41" (1/3) ... [2020-08-22 01:22:42,674 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc3b449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:42, skipping insertion in model container [2020-08-22 01:22:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (2/3) ... [2020-08-22 01:22:42,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bc3b449 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:42, skipping insertion in model container [2020-08-22 01:22:42,677 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:42" (3/3) ... [2020-08-22 01:22:42,678 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-22 01:22:42,687 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:22:42,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:22:42,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:22:42,739 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:22:42,739 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:22:42,739 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:22:42,739 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:22:42,741 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:22:42,741 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:22:42,741 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:22:42,741 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:22:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 01:22:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 01:22:42,767 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:42,768 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 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] [2020-08-22 01:22:42,768 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:42,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:42,775 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 01:22:42,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:42,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45666606] [2020-08-22 01:22:42,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:42,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:42,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:42,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 01:22:43,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 01:22:43,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,131 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:43,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45666606] [2020-08-22 01:22:43,134 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:43,135 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 01:22:43,136 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202346289] [2020-08-22 01:22:43,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:43,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:43,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:43,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:43,159 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 01:22:43,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:43,351 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 01:22:43,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:43,354 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 01:22:43,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:43,368 INFO L225 Difference]: With dead ends: 136 [2020-08-22 01:22:43,368 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:22:43,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:43,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:22:43,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 01:22:43,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 01:22:43,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 01:22:43,432 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 01:22:43,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:43,433 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 01:22:43,433 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:43,433 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 01:22:43,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:22:43,437 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:43,437 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:43,438 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:22:43,438 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:43,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:43,439 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 01:22:43,439 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:43,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741395410] [2020-08-22 01:22:43,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:43,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:43,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:22:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:22:43,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:43,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,653 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:43,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741395410] [2020-08-22 01:22:43,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:43,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 01:22:43,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120022310] [2020-08-22 01:22:43,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:43,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:43,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:43,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:43,661 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 01:22:43,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:43,808 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 01:22:43,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:22:43,809 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 01:22:43,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:43,812 INFO L225 Difference]: With dead ends: 129 [2020-08-22 01:22:43,812 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 01:22:43,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:43,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 01:22:43,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 01:22:43,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:22:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 01:22:43,859 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 01:22:43,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:43,860 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 01:22:43,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:43,860 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 01:22:43,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:22:43,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:43,865 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:43,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:22:43,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:43,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:43,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 01:22:43,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:43,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012224553] [2020-08-22 01:22:43,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:43,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:43,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:22:44,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:22:44,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:22:44,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,058 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,059 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012224553] [2020-08-22 01:22:44,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:22:44,060 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515571735] [2020-08-22 01:22:44,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:44,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:44,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:44,061 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 01:22:44,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,175 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 01:22:44,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:44,176 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 01:22:44,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,179 INFO L225 Difference]: With dead ends: 145 [2020-08-22 01:22:44,179 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 01:22:44,180 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 01:22:44,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 01:22:44,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 01:22:44,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 01:22:44,194 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 01:22:44,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,195 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 01:22:44,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:44,195 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 01:22:44,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:22:44,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,198 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-08-22 01:22:44,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:22:44,198 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,199 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 01:22:44,199 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,199 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1835967761] [2020-08-22 01:22:44,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 01:22:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 01:22:44,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:44,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1835967761] [2020-08-22 01:22:44,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:22:44,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354910521] [2020-08-22 01:22:44,348 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:44,348 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:44,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:44,349 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 01:22:44,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,444 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 01:22:44,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:44,445 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 01:22:44,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,447 INFO L225 Difference]: With dead ends: 156 [2020-08-22 01:22:44,448 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 01:22:44,450 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 01:22:44,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 01:22:44,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:22:44,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 01:22:44,475 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 01:22:44,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,480 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 01:22:44,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:44,480 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 01:22:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:22:44,487 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,487 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 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, 1, 1, 1, 1] [2020-08-22 01:22:44,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:22:44,488 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 01:22:44,488 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601575167] [2020-08-22 01:22:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:22:44,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:44,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:22:44,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,625 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601575167] [2020-08-22 01:22:44,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:22:44,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580205968] [2020-08-22 01:22:44,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:44,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:44,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,627 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 01:22:44,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,728 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 01:22:44,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:22:44,728 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 01:22:44,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,730 INFO L225 Difference]: With dead ends: 166 [2020-08-22 01:22:44,731 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 01:22:44,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:44,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 01:22:44,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 01:22:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:22:44,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 01:22:44,746 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 01:22:44,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,746 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 01:22:44,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:44,747 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 01:22:44,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:22:44,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,749 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 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, 1, 1] [2020-08-22 01:22:44,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:22:44,749 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,750 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 01:22:44,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1789720713] [2020-08-22 01:22:44,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:22:44,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:22:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,885 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1789720713] [2020-08-22 01:22:44,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:22:44,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969253750] [2020-08-22 01:22:44,889 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:44,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:44,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,890 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 01:22:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,024 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 01:22:45,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:22:45,025 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 01:22:45,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,027 INFO L225 Difference]: With dead ends: 176 [2020-08-22 01:22:45,027 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:22:45,031 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:22:45,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 01:22:45,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 01:22:45,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 01:22:45,063 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 01:22:45,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,063 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 01:22:45,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:45,064 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 01:22:45,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 01:22:45,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,066 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 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, 1, 1, 1] [2020-08-22 01:22:45,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:22:45,066 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,067 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 01:22:45,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92508187] [2020-08-22 01:22:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 01:22:45,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:45,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:22:45,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,271 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,272 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92508187] [2020-08-22 01:22:45,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,272 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:22:45,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888106312] [2020-08-22 01:22:45,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:22:45,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:22:45,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,276 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 01:22:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,413 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 01:22:45,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:22:45,414 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 01:22:45,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,416 INFO L225 Difference]: With dead ends: 178 [2020-08-22 01:22:45,416 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 01:22:45,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 01:22:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 01:22:45,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 01:22:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 01:22:45,449 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 01:22:45,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,450 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 01:22:45,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:22:45,450 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 01:22:45,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:22:45,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,454 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:22:45,454 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 01:22:45,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812462984] [2020-08-22 01:22:45,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:22:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 01:22:45,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:45,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812462984] [2020-08-22 01:22:45,597 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,597 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:22:45,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679511617] [2020-08-22 01:22:45,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:22:45,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:22:45,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,599 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 01:22:45,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,708 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 01:22:45,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:22:45,709 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 01:22:45,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,711 INFO L225 Difference]: With dead ends: 193 [2020-08-22 01:22:45,711 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 01:22:45,712 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 01:22:45,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 01:22:45,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 01:22:45,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 01:22:45,722 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 01:22:45,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,723 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 01:22:45,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:22:45,723 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 01:22:45,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 01:22:45,724 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,725 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:22:45,725 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,726 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 01:22:45,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469659991] [2020-08-22 01:22:45,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 01:22:45,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:45,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 01:22:45,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,877 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469659991] [2020-08-22 01:22:45,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:22:45,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394707971] [2020-08-22 01:22:45,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:22:45,879 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:22:45,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,879 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 01:22:46,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,085 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 01:22:46,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:22:46,086 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 01:22:46,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,087 INFO L225 Difference]: With dead ends: 190 [2020-08-22 01:22:46,087 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 01:22:46,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 01:22:46,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 01:22:46,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 01:22:46,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 01:22:46,099 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 01:22:46,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,100 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 01:22:46,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:22:46,100 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 01:22:46,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 01:22:46,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,102 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,102 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:22:46,102 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 01:22:46,103 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,103 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873791481] [2020-08-22 01:22:46,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:46,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:22:46,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:46,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,226 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873791481] [2020-08-22 01:22:46,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:22:46,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012205393] [2020-08-22 01:22:46,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:22:46,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:22:46,229 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:46,229 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 01:22:46,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,356 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 01:22:46,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:22:46,357 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 01:22:46,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,359 INFO L225 Difference]: With dead ends: 210 [2020-08-22 01:22:46,359 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 01:22:46,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 01:22:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 01:22:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 01:22:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 01:22:46,375 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 01:22:46,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,375 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 01:22:46,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:22:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 01:22:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:22:46,376 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:22:46,377 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,377 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 01:22:46,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,378 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641620104] [2020-08-22 01:22:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 01:22:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:46,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:22:46,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,622 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641620104] [2020-08-22 01:22:46,623 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,623 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:22:46,623 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579921775] [2020-08-22 01:22:46,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:22:46,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:22:46,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,625 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 01:22:46,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,790 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 01:22:46,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:22:46,793 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 01:22:46,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,795 INFO L225 Difference]: With dead ends: 202 [2020-08-22 01:22:46,796 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 01:22:46,797 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:46,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 01:22:46,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 01:22:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 01:22:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 01:22:46,813 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 01:22:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,813 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 01:22:46,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:22:46,814 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 01:22:46,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 01:22:46,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,815 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:22:46,816 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 01:22:46,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307342825] [2020-08-22 01:22:46,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:46,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 01:22:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:46,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307342825] [2020-08-22 01:22:46,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,959 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:22:46,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867768300] [2020-08-22 01:22:46,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:22:46,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:22:46,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,960 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 01:22:47,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:47,078 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 01:22:47,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:22:47,079 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 01:22:47,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:47,081 INFO L225 Difference]: With dead ends: 227 [2020-08-22 01:22:47,081 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 01:22:47,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:47,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 01:22:47,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 01:22:47,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 01:22:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 01:22:47,093 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 01:22:47,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:47,094 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 01:22:47,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:22:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 01:22:47,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 01:22:47,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:47,095 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:47,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:22:47,096 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:47,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:47,096 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 01:22:47,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:47,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356864689] [2020-08-22 01:22:47,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:47,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:22:47,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:47,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:22:47,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,307 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:47,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356864689] [2020-08-22 01:22:47,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:47,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:22:47,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551134158] [2020-08-22 01:22:47,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:22:47,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:47,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:22:47,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:47,310 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 01:22:47,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:47,549 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 01:22:47,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:22:47,550 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 01:22:47,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:47,552 INFO L225 Difference]: With dead ends: 214 [2020-08-22 01:22:47,552 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 01:22:47,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:47,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 01:22:47,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 01:22:47,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 01:22:47,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 01:22:47,564 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 01:22:47,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:47,564 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 01:22:47,565 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:22:47,565 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 01:22:47,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 01:22:47,566 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:47,566 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:47,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:22:47,567 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:47,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:47,567 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 01:22:47,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:47,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [289308632] [2020-08-22 01:22:47,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:47,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:47,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:47,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:47,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 01:22:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,705 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:47,705 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [289308632] [2020-08-22 01:22:47,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:47,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:22:47,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398471102] [2020-08-22 01:22:47,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:22:47,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:47,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:22:47,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:47,708 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 01:22:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:47,844 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 01:22:47,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:22:47,845 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 01:22:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:47,846 INFO L225 Difference]: With dead ends: 244 [2020-08-22 01:22:47,846 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 01:22:47,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:47,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 01:22:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 01:22:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 01:22:47,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 01:22:47,859 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 01:22:47,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:47,859 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 01:22:47,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:22:47,859 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 01:22:47,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 01:22:47,861 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:47,861 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:47,861 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:22:47,861 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:47,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:47,862 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 01:22:47,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:47,862 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234178483] [2020-08-22 01:22:47,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:47,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:47,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:22:48,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:48,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:22:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,101 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:48,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234178483] [2020-08-22 01:22:48,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:48,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:22:48,102 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814897177] [2020-08-22 01:22:48,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:22:48,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:48,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:22:48,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:48,104 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 01:22:48,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:48,364 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 01:22:48,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:48,365 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 01:22:48,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:48,366 INFO L225 Difference]: With dead ends: 226 [2020-08-22 01:22:48,367 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 01:22:48,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 01:22:48,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 01:22:48,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 01:22:48,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 01:22:48,379 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 01:22:48,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:48,379 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 01:22:48,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:22:48,380 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 01:22:48,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:22:48,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:48,381 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:48,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:22:48,381 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:48,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:48,382 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 01:22:48,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:48,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428161346] [2020-08-22 01:22:48,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:48,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:48,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:48,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:48,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 01:22:48,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,533 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:48,533 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428161346] [2020-08-22 01:22:48,534 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:48,534 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:22:48,534 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351279372] [2020-08-22 01:22:48,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:22:48,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:48,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:22:48,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:48,535 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 01:22:48,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:48,691 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 01:22:48,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:48,691 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 01:22:48,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:48,694 INFO L225 Difference]: With dead ends: 261 [2020-08-22 01:22:48,694 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 01:22:48,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 01:22:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 01:22:48,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 01:22:48,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 01:22:48,710 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 01:22:48,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:48,711 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 01:22:48,711 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:22:48,711 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 01:22:48,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 01:22:48,712 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:48,712 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:48,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:22:48,713 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:48,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:48,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 01:22:48,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:48,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741625046] [2020-08-22 01:22:48,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:48,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:48,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:48,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:22:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:48,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,941 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:48,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741625046] [2020-08-22 01:22:48,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:48,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:22:48,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907990175] [2020-08-22 01:22:48,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:22:48,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:48,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:22:48,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,944 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 01:22:49,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:49,210 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 01:22:49,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:22:49,211 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 01:22:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:49,212 INFO L225 Difference]: With dead ends: 238 [2020-08-22 01:22:49,213 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 01:22:49,213 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:49,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 01:22:49,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 01:22:49,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 01:22:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 01:22:49,225 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 01:22:49,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:49,225 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 01:22:49,225 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:22:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 01:22:49,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 01:22:49,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:49,227 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:49,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:22:49,227 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:49,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:49,228 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 01:22:49,228 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:49,228 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690654751] [2020-08-22 01:22:49,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:49,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:49,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:49,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:49,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:49,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 01:22:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:49,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:49,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690654751] [2020-08-22 01:22:49,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:49,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:22:49,391 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876160759] [2020-08-22 01:22:49,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:22:49,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:22:49,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:49,392 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 01:22:49,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:49,548 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 01:22:49,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:22:49,548 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 01:22:49,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:49,550 INFO L225 Difference]: With dead ends: 278 [2020-08-22 01:22:49,550 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 01:22:49,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:49,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 01:22:49,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 01:22:49,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 01:22:49,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 01:22:49,563 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 01:22:49,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:49,564 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 01:22:49,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:22:49,564 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 01:22:49,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 01:22:49,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:49,565 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:49,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:22:49,566 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:49,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:49,566 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 01:22:49,566 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:49,566 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498160409] [2020-08-22 01:22:49,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:49,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:49,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:49,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:49,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 01:22:49,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:49,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:22:49,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,831 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:49,832 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498160409] [2020-08-22 01:22:49,832 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:49,832 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:22:49,833 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849422863] [2020-08-22 01:22:49,833 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:22:49,833 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:49,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:22:49,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:49,834 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 01:22:50,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:50,174 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 01:22:50,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:50,175 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 01:22:50,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:50,177 INFO L225 Difference]: With dead ends: 250 [2020-08-22 01:22:50,178 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 01:22:50,179 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:50,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 01:22:50,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 01:22:50,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 01:22:50,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 01:22:50,200 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 01:22:50,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:50,201 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 01:22:50,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:22:50,201 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 01:22:50,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 01:22:50,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:50,203 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:50,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:22:50,203 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:50,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:50,204 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 01:22:50,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:50,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986591671] [2020-08-22 01:22:50,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:50,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:50,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:50,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:50,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 01:22:50,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:50,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,534 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:50,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986591671] [2020-08-22 01:22:50,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:50,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:22:50,536 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498736418] [2020-08-22 01:22:50,536 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:22:50,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:50,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:22:50,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:50,538 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 01:22:50,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:50,719 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 01:22:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:50,719 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 01:22:50,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:50,721 INFO L225 Difference]: With dead ends: 295 [2020-08-22 01:22:50,721 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 01:22:50,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:50,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 01:22:50,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 01:22:50,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 01:22:50,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 01:22:50,745 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 01:22:50,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:50,746 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 01:22:50,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:22:50,746 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 01:22:50,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 01:22:50,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:50,748 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:50,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:22:50,748 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:50,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:50,749 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 01:22:50,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:50,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1338422956] [2020-08-22 01:22:50,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:50,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:22:51,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:51,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 01:22:51,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:51,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1338422956] [2020-08-22 01:22:51,087 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:51,087 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:22:51,087 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680004654] [2020-08-22 01:22:51,088 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:22:51,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:51,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:22:51,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:51,089 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 01:22:51,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:51,475 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 01:22:51,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:22:51,476 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 01:22:51,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:51,478 INFO L225 Difference]: With dead ends: 262 [2020-08-22 01:22:51,478 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 01:22:51,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:51,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 01:22:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 01:22:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 01:22:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 01:22:51,495 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 01:22:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:51,495 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 01:22:51,495 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:22:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 01:22:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 01:22:51,496 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:51,497 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:51,498 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:22:51,498 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:51,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:51,499 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 01:22:51,499 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:51,499 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186285910] [2020-08-22 01:22:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:51,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:51,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:51,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:51,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 01:22:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,735 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:51,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186285910] [2020-08-22 01:22:51,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:51,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:22:51,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808005873] [2020-08-22 01:22:51,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:22:51,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:51,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:22:51,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:51,737 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 01:22:51,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:51,907 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 01:22:51,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:22:51,908 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 01:22:51,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:51,910 INFO L225 Difference]: With dead ends: 312 [2020-08-22 01:22:51,910 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 01:22:51,911 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:51,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 01:22:51,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 01:22:51,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 01:22:51,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 01:22:51,924 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 01:22:51,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:51,925 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 01:22:51,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:22:51,925 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 01:22:51,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 01:22:51,926 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:51,926 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:51,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:22:51,927 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:51,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:51,927 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 01:22:51,927 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:51,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2098641658] [2020-08-22 01:22:51,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:51,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:51,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:51,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:22:52,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:52,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:22:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,240 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:52,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2098641658] [2020-08-22 01:22:52,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:52,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:22:52,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506129168] [2020-08-22 01:22:52,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:22:52,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:22:52,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:52,242 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 01:22:52,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,681 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 01:22:52,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:22:52,682 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 01:22:52,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,684 INFO L225 Difference]: With dead ends: 274 [2020-08-22 01:22:52,684 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 01:22:52,685 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:52,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 01:22:52,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 01:22:52,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 01:22:52,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 01:22:52,700 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 01:22:52,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,700 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 01:22:52,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:22:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 01:22:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 01:22:52,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,702 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:22:52,702 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,703 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 01:22:52,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095389084] [2020-08-22 01:22:52,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:52,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:52,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:52,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 01:22:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:22:52,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:52,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095389084] [2020-08-22 01:22:52,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:52,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:22:52,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771639428] [2020-08-22 01:22:52,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:22:52,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:22:52,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:52,958 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 01:22:53,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:53,152 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 01:22:53,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:22:53,153 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 01:22:53,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:53,155 INFO L225 Difference]: With dead ends: 329 [2020-08-22 01:22:53,156 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 01:22:53,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:53,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 01:22:53,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 01:22:53,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 01:22:53,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 01:22:53,174 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 01:22:53,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:53,174 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 01:22:53,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:22:53,175 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 01:22:53,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:22:53,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:53,177 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:53,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:22:53,177 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:53,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:53,178 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 01:22:53,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:53,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221836276] [2020-08-22 01:22:53,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:53,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:22:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:53,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 01:22:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,573 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:53,573 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221836276] [2020-08-22 01:22:53,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:53,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:22:53,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752331669] [2020-08-22 01:22:53,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:22:53,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:53,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:22:53,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:53,575 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 01:22:54,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,009 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 01:22:54,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:22:54,009 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 01:22:54,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,011 INFO L225 Difference]: With dead ends: 286 [2020-08-22 01:22:54,011 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 01:22:54,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:54,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 01:22:54,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 01:22:54,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 01:22:54,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 01:22:54,027 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 01:22:54,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,027 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 01:22:54,027 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:22:54,028 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 01:22:54,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 01:22:54,029 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,029 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:22:54,029 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 01:22:54,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007747565] [2020-08-22 01:22:54,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 01:22:54,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:22:54,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,335 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:54,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007747565] [2020-08-22 01:22:54,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:54,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:22:54,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239758264] [2020-08-22 01:22:54,338 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:22:54,338 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:22:54,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:54,339 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 01:22:54,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,547 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 01:22:54,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:22:54,548 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 01:22:54,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,550 INFO L225 Difference]: With dead ends: 346 [2020-08-22 01:22:54,550 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 01:22:54,551 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:54,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 01:22:54,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 01:22:54,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 01:22:54,565 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 01:22:54,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,566 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 01:22:54,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:22:54,566 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 01:22:54,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 01:22:54,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,568 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:22:54,568 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,569 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 01:22:54,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1554700021] [2020-08-22 01:22:54,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 01:22:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,637 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 01:22:54,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1554700021] [2020-08-22 01:22:54,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:54,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:22:54,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [3248681] [2020-08-22 01:22:54,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:22:54,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:22:54,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:22:54,639 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 01:22:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,664 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 01:22:54,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:22:54,664 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 01:22:54,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,666 INFO L225 Difference]: With dead ends: 160 [2020-08-22 01:22:54,666 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 01:22:54,667 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:22:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 01:22:54,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 01:22:54,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 01:22:54,683 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 01:22:54,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,683 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 01:22:54,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:22:54,683 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 01:22:54,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:22:54,685 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,685 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:22:54,685 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,686 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 01:22:54,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733982516] [2020-08-22 01:22:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:54,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:54,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:22:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,761 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 01:22:54,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733982516] [2020-08-22 01:22:54,761 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:54,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:22:54,762 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606157667] [2020-08-22 01:22:54,762 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:54,762 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:54,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:54,763 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 01:22:54,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,801 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 01:22:54,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:22:54,801 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 01:22:54,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,803 INFO L225 Difference]: With dead ends: 161 [2020-08-22 01:22:54,804 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 01:22:54,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:54,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 01:22:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 01:22:54,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 01:22:54,821 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 01:22:54,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,822 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 01:22:54,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:54,822 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 01:22:54,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:22:54,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,825 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:22:54,825 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 01:22:54,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1728747244] [2020-08-22 01:22:54,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:55,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:55,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:22:55,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,258 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:55,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1728747244] [2020-08-22 01:22:55,259 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:55,259 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:22:55,259 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84395492] [2020-08-22 01:22:55,260 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:22:55,260 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:55,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:22:55,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:55,261 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 01:22:55,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:55,935 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 01:22:55,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:22:55,935 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 01:22:55,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:55,937 INFO L225 Difference]: With dead ends: 298 [2020-08-22 01:22:55,937 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 01:22:55,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:55,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 01:22:55,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 01:22:55,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 01:22:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 01:22:55,955 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 01:22:55,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:55,955 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 01:22:55,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:22:55,955 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 01:22:55,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 01:22:55,956 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:55,957 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:55,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:22:55,957 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:55,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:55,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 01:22:55,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:55,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381830355] [2020-08-22 01:22:55,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:55,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:55,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:56,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 01:22:56,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 01:22:56,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,273 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:56,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381830355] [2020-08-22 01:22:56,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:22:56,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876007127] [2020-08-22 01:22:56,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:22:56,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:22:56,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:56,278 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 01:22:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:56,515 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 01:22:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:22:56,516 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 01:22:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:56,518 INFO L225 Difference]: With dead ends: 363 [2020-08-22 01:22:56,518 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 01:22:56,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:56,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 01:22:56,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 01:22:56,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 01:22:56,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 01:22:56,535 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 01:22:56,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:56,535 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 01:22:56,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:22:56,535 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 01:22:56,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 01:22:56,537 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:56,537 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:56,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:22:56,537 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 01:22:56,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:56,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340373386] [2020-08-22 01:22:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:56,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:56,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:56,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:22:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:22:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,951 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 01:22:56,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,969 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:56,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340373386] [2020-08-22 01:22:56,969 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:22:56,970 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119932970] [2020-08-22 01:22:56,970 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:22:56,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:22:56,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:56,971 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 01:22:57,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:57,571 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 01:22:57,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:22:57,572 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 01:22:57,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:57,574 INFO L225 Difference]: With dead ends: 310 [2020-08-22 01:22:57,574 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 01:22:57,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:57,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 01:22:57,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 01:22:57,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 01:22:57,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 01:22:57,591 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 01:22:57,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:57,591 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 01:22:57,591 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:22:57,591 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 01:22:57,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 01:22:57,592 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:57,593 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:57,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:22:57,593 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:57,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:57,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 01:22:57,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:57,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266436064] [2020-08-22 01:22:57,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:57,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:57,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:57,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:57,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 01:22:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:22:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,911 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:57,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266436064] [2020-08-22 01:22:57,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:57,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:22:57,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287201367] [2020-08-22 01:22:57,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:22:57,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:57,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:22:57,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:57,916 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 01:22:58,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:58,213 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 01:22:58,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:22:58,214 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 01:22:58,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:58,218 INFO L225 Difference]: With dead ends: 380 [2020-08-22 01:22:58,218 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 01:22:58,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:58,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 01:22:58,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 01:22:58,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 01:22:58,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 01:22:58,247 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 01:22:58,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:58,247 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 01:22:58,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:22:58,248 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 01:22:58,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 01:22:58,250 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:58,250 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:58,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:22:58,251 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:58,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:58,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 01:22:58,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:58,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632015638] [2020-08-22 01:22:58,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 01:22:59,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:22:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 01:22:59,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,062 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:59,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632015638] [2020-08-22 01:22:59,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:59,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:22:59,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26491108] [2020-08-22 01:22:59,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:22:59,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:59,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:22:59,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:59,067 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 01:22:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:59,898 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 01:22:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:22:59,899 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 01:22:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:59,906 INFO L225 Difference]: With dead ends: 322 [2020-08-22 01:22:59,906 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 01:22:59,908 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:22:59,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 01:22:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 01:22:59,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 01:22:59,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 01:22:59,924 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 01:22:59,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:59,925 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 01:22:59,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:22:59,925 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 01:22:59,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 01:22:59,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:59,927 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:59,927 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:22:59,927 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:59,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:59,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 01:22:59,928 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:59,928 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169922452] [2020-08-22 01:22:59,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:59,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:59,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:23:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 01:23:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 01:23:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,254 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:00,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169922452] [2020-08-22 01:23:00,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:00,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:23:00,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764571457] [2020-08-22 01:23:00,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:23:00,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:00,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:23:00,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:23:00,256 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 01:23:00,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:00,514 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 01:23:00,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:00,514 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 01:23:00,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:00,517 INFO L225 Difference]: With dead ends: 397 [2020-08-22 01:23:00,517 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 01:23:00,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:00,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 01:23:00,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 01:23:00,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 01:23:00,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 01:23:00,532 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 01:23:00,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:00,532 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 01:23:00,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:23:00,533 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 01:23:00,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 01:23:00,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:00,534 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:00,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 01:23:00,534 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:00,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:00,535 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 01:23:00,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:00,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200331623] [2020-08-22 01:23:00,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:00,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:23:01,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 01:23:01,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 01:23:01,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,258 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:01,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200331623] [2020-08-22 01:23:01,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:01,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:23:01,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994154982] [2020-08-22 01:23:01,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:23:01,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:01,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:23:01,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:01,264 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 01:23:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:02,261 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 01:23:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:23:02,262 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 01:23:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:02,264 INFO L225 Difference]: With dead ends: 334 [2020-08-22 01:23:02,264 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 01:23:02,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 01:23:02,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 01:23:02,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 01:23:02,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 01:23:02,291 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 01:23:02,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:02,294 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 01:23:02,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:23:02,295 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 01:23:02,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 01:23:02,296 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:02,296 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:02,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 01:23:02,297 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 01:23:02,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:02,298 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379223724] [2020-08-22 01:23:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:02,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:02,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:23:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:23:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 01:23:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,646 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:02,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379223724] [2020-08-22 01:23:02,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:02,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:23:02,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047967944] [2020-08-22 01:23:02,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:23:02,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:02,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:23:02,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:02,648 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 01:23:02,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:02,921 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 01:23:02,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:23:02,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 01:23:02,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:02,923 INFO L225 Difference]: With dead ends: 414 [2020-08-22 01:23:02,924 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 01:23:02,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:02,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 01:23:02,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 01:23:02,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 01:23:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 01:23:02,943 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 01:23:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:02,944 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 01:23:02,944 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:23:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 01:23:02,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 01:23:02,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:02,946 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:02,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 01:23:02,946 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:02,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:02,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 01:23:02,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:02,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147203180] [2020-08-22 01:23:02,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:02,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:03,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:03,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:03,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 01:23:03,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:23:03,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 01:23:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,519 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:03,520 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147203180] [2020-08-22 01:23:03,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:03,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:03,521 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93272565] [2020-08-22 01:23:03,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:03,522 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:03,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:03,523 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 01:23:04,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:04,433 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 01:23:04,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:04,434 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 01:23:04,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:04,437 INFO L225 Difference]: With dead ends: 346 [2020-08-22 01:23:04,437 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 01:23:04,438 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:04,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 01:23:04,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 01:23:04,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 01:23:04,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 01:23:04,455 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 01:23:04,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:04,456 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 01:23:04,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:04,456 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 01:23:04,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 01:23:04,457 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:04,458 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:04,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 01:23:04,458 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:04,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:04,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 01:23:04,459 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:04,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776476461] [2020-08-22 01:23:04,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:04,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:04,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:04,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:04,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:23:04,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 01:23:04,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 01:23:04,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:04,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776476461] [2020-08-22 01:23:04,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:04,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:04,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077865507] [2020-08-22 01:23:04,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:04,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:04,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:04,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:04,876 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 01:23:05,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:05,276 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 01:23:05,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:05,277 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 01:23:05,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:05,279 INFO L225 Difference]: With dead ends: 431 [2020-08-22 01:23:05,279 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 01:23:05,281 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:05,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 01:23:05,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 01:23:05,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 01:23:05,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 01:23:05,306 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 01:23:05,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:05,306 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 01:23:05,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:05,307 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 01:23:05,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 01:23:05,309 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:05,310 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:05,310 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 01:23:05,310 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:05,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:05,311 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 01:23:05,311 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:05,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588584330] [2020-08-22 01:23:05,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:05,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:05,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 01:23:05,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 01:23:05,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,859 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 01:23:05,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,883 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:05,883 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588584330] [2020-08-22 01:23:05,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:05,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:05,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567917305] [2020-08-22 01:23:05,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:05,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:05,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:05,885 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 01:23:06,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:06,719 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 01:23:06,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:23:06,720 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 01:23:06,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:06,722 INFO L225 Difference]: With dead ends: 358 [2020-08-22 01:23:06,722 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 01:23:06,723 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:06,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 01:23:06,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 01:23:06,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 01:23:06,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 01:23:06,739 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 01:23:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:06,739 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 01:23:06,740 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:06,740 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 01:23:06,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 01:23:06,741 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:06,741 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:06,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 01:23:06,742 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:06,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:06,742 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 01:23:06,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:06,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752484660] [2020-08-22 01:23:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:06,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 01:23:07,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 01:23:07,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:07,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,220 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:07,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752484660] [2020-08-22 01:23:07,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:07,221 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:07,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558275966] [2020-08-22 01:23:07,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:07,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:07,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:07,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:07,225 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 01:23:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:07,532 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 01:23:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:23:07,533 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 01:23:07,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:07,535 INFO L225 Difference]: With dead ends: 448 [2020-08-22 01:23:07,535 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 01:23:07,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:07,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 01:23:07,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 01:23:07,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 01:23:07,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 01:23:07,563 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 01:23:07,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:07,564 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 01:23:07,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:07,564 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 01:23:07,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 01:23:07,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:07,568 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:07,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 01:23:07,568 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:07,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:07,569 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 01:23:07,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:07,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982015665] [2020-08-22 01:23:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:07,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:07,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:07,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 01:23:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 01:23:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 01:23:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,160 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:08,160 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982015665] [2020-08-22 01:23:08,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:08,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:23:08,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728677772] [2020-08-22 01:23:08,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:23:08,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:08,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:23:08,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:08,162 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 01:23:09,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:09,184 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 01:23:09,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:09,185 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 01:23:09,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:09,187 INFO L225 Difference]: With dead ends: 370 [2020-08-22 01:23:09,187 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 01:23:09,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:09,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 01:23:09,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 01:23:09,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 01:23:09,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 01:23:09,205 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 01:23:09,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:09,206 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 01:23:09,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:23:09,206 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 01:23:09,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 01:23:09,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:09,207 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:09,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 01:23:09,208 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:09,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:09,208 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 01:23:09,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:09,209 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775377517] [2020-08-22 01:23:09,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:09,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:23:09,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 01:23:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 01:23:09,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,796 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:09,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775377517] [2020-08-22 01:23:09,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:23:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917989155] [2020-08-22 01:23:09,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:23:09,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:09,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:23:09,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:09,798 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 01:23:10,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:10,144 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 01:23:10,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:10,149 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 01:23:10,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:10,152 INFO L225 Difference]: With dead ends: 465 [2020-08-22 01:23:10,152 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 01:23:10,153 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:10,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 01:23:10,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 01:23:10,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 01:23:10,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 01:23:10,173 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 01:23:10,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:10,173 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 01:23:10,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:23:10,174 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 01:23:10,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 01:23:10,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:10,176 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:10,176 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 01:23:10,176 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:10,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:10,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 01:23:10,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:10,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348802608] [2020-08-22 01:23:10,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:10,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:10,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:10,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:23:10,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 01:23:10,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 01:23:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,902 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:10,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348802608] [2020-08-22 01:23:10,904 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:10,904 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:10,904 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574173824] [2020-08-22 01:23:10,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:10,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:10,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:10,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:10,907 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 01:23:12,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:12,099 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 01:23:12,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:23:12,107 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 01:23:12,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:12,110 INFO L225 Difference]: With dead ends: 382 [2020-08-22 01:23:12,110 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 01:23:12,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:12,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 01:23:12,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 01:23:12,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 01:23:12,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 01:23:12,134 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 01:23:12,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:12,136 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 01:23:12,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:12,136 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 01:23:12,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 01:23:12,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:12,138 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:12,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 01:23:12,138 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 01:23:12,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:12,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [723571081] [2020-08-22 01:23:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:12,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 01:23:12,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 01:23:12,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 01:23:12,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,617 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:12,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [723571081] [2020-08-22 01:23:12,618 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:12,618 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:12,618 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131240622] [2020-08-22 01:23:12,619 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:12,619 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:12,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:12,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:12,620 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 01:23:13,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:13,140 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 01:23:13,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:23:13,141 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 01:23:13,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:13,144 INFO L225 Difference]: With dead ends: 482 [2020-08-22 01:23:13,144 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 01:23:13,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 01:23:13,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 01:23:13,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 01:23:13,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 01:23:13,165 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 01:23:13,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:13,165 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 01:23:13,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:13,166 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 01:23:13,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 01:23:13,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:13,167 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:13,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 01:23:13,167 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:13,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:13,168 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 01:23:13,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:13,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478503486] [2020-08-22 01:23:13,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:13,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 01:23:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 01:23:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 01:23:13,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,836 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:13,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478503486] [2020-08-22 01:23:13,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:13,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:13,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055117190] [2020-08-22 01:23:13,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:13,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:13,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:13,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:13,838 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 01:23:15,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:15,112 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 01:23:15,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:23:15,113 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 01:23:15,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:15,115 INFO L225 Difference]: With dead ends: 394 [2020-08-22 01:23:15,116 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 01:23:15,117 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:15,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 01:23:15,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 01:23:15,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 01:23:15,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 01:23:15,134 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 01:23:15,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:15,136 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 01:23:15,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:15,137 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 01:23:15,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 01:23:15,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:15,138 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:15,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 01:23:15,138 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:15,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:15,139 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 01:23:15,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:15,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911540739] [2020-08-22 01:23:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:15,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:15,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:15,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:15,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 01:23:15,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 01:23:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 01:23:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:15,700 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911540739] [2020-08-22 01:23:15,700 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:15,700 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:15,700 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814918221] [2020-08-22 01:23:15,701 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:15,701 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:15,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:15,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:15,702 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 01:23:16,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:16,092 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 01:23:16,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:23:16,093 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 01:23:16,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:16,096 INFO L225 Difference]: With dead ends: 499 [2020-08-22 01:23:16,096 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 01:23:16,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:16,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 01:23:16,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 01:23:16,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 01:23:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 01:23:16,118 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 01:23:16,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:16,119 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 01:23:16,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 01:23:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 01:23:16,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:16,121 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:16,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 01:23:16,121 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:16,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:16,121 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 01:23:16,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:16,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [331213753] [2020-08-22 01:23:16,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:16,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:16,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 01:23:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 01:23:17,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:17,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,151 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:17,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [331213753] [2020-08-22 01:23:17,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:17,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:17,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558038602] [2020-08-22 01:23:17,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:17,153 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:17,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:17,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:17,154 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 01:23:18,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:18,542 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 01:23:18,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:23:18,544 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 01:23:18,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:18,548 INFO L225 Difference]: With dead ends: 406 [2020-08-22 01:23:18,548 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 01:23:18,549 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:18,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 01:23:18,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 01:23:18,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 01:23:18,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 01:23:18,587 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 01:23:18,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:18,588 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 01:23:18,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:18,588 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 01:23:18,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 01:23:18,589 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:18,589 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:18,589 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 01:23:18,590 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:18,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:18,590 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 01:23:18,590 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:18,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713860078] [2020-08-22 01:23:18,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:18,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:18,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 01:23:19,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 01:23:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 01:23:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:19,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713860078] [2020-08-22 01:23:19,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:19,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:19,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591306641] [2020-08-22 01:23:19,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:19,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:19,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:19,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:19,210 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 01:23:19,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:19,500 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 01:23:19,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:23:19,500 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 01:23:19,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:19,503 INFO L225 Difference]: With dead ends: 516 [2020-08-22 01:23:19,503 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 01:23:19,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:19,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 01:23:19,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 01:23:19,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 01:23:19,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 01:23:19,524 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 01:23:19,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:19,524 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 01:23:19,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 01:23:19,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 01:23:19,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:19,526 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:19,526 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 01:23:19,526 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:19,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:19,527 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 01:23:19,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:19,527 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285103116] [2020-08-22 01:23:19,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:19,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:19,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 01:23:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 01:23:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 01:23:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,319 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:20,319 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285103116] [2020-08-22 01:23:20,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:20,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:23:20,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608089956] [2020-08-22 01:23:20,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:23:20,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:23:20,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:20,321 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 01:23:21,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:21,949 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 01:23:21,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:23:21,950 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 01:23:21,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:21,952 INFO L225 Difference]: With dead ends: 418 [2020-08-22 01:23:21,952 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 01:23:21,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:21,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 01:23:21,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 01:23:21,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 01:23:21,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 01:23:21,971 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 01:23:21,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:21,972 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 01:23:21,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:23:21,972 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 01:23:21,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 01:23:21,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:21,973 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:21,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 01:23:21,973 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:21,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:21,974 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 01:23:21,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:21,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875399530] [2020-08-22 01:23:21,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:22,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:22,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 01:23:22,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 01:23:22,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 01:23:22,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,576 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:22,576 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875399530] [2020-08-22 01:23:22,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:22,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:23:22,577 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278968359] [2020-08-22 01:23:22,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:23:22,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:22,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:23:22,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:22,578 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 01:23:23,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:23,037 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 01:23:23,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:23:23,037 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 01:23:23,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:23,039 INFO L225 Difference]: With dead ends: 533 [2020-08-22 01:23:23,039 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 01:23:23,040 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:23,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 01:23:23,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 01:23:23,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 01:23:23,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 01:23:23,060 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 01:23:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:23,061 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 01:23:23,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:23:23,061 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 01:23:23,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 01:23:23,062 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:23,062 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:23,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 01:23:23,063 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:23,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:23,063 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 01:23:23,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:23,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928260018] [2020-08-22 01:23:23,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:23,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:23,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:23,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 01:23:23,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928260018] [2020-08-22 01:23:23,288 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:23,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 01:23:23,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823694374] [2020-08-22 01:23:23,289 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:23,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:23,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:23,290 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:23,290 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 01:23:23,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:23,523 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 01:23:23,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:23,526 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 01:23:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:23,527 INFO L225 Difference]: With dead ends: 271 [2020-08-22 01:23:23,528 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 01:23:23,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:23,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 01:23:23,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 01:23:23,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 01:23:23,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 01:23:23,551 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 01:23:23,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:23,552 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 01:23:23,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:23,552 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 01:23:23,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 01:23:23,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:23,553 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:23,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 01:23:23,554 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:23,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:23,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 01:23:23,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:23,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564713575] [2020-08-22 01:23:23,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:23,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:23,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:23,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:23,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:23,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:23,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564713575] [2020-08-22 01:23:23,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:23,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:23:23,860 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515402041] [2020-08-22 01:23:23,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:23,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:23,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:23,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:23,862 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 01:23:24,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,162 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 01:23:24,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:24,165 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 01:23:24,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,168 INFO L225 Difference]: With dead ends: 285 [2020-08-22 01:23:24,169 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 01:23:24,169 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:23:24,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 01:23:24,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 01:23:24,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 01:23:24,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 01:23:24,200 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 01:23:24,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,201 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 01:23:24,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 01:23:24,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 01:23:24,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,203 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:24,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 01:23:24,203 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 01:23:24,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [667264159] [2020-08-22 01:23:24,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:24,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:24,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:24,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 01:23:24,320 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [667264159] [2020-08-22 01:23:24,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:24,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:23:24,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644845115] [2020-08-22 01:23:24,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:23:24,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:24,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:23:24,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:23:24,322 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 01:23:24,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,390 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 01:23:24,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:23:24,391 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 01:23:24,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,393 INFO L225 Difference]: With dead ends: 271 [2020-08-22 01:23:24,393 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 01:23:24,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:24,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 01:23:24,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 01:23:24,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 01:23:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 01:23:24,443 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 01:23:24,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,443 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 01:23:24,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:23:24,443 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 01:23:24,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 01:23:24,446 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,446 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:24,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 01:23:24,446 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,447 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 01:23:24,447 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [368406235] [2020-08-22 01:23:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:24,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:24,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:24,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:24,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,807 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:24,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [368406235] [2020-08-22 01:23:24,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:24,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:23:24,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354387430] [2020-08-22 01:23:24,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:23:24,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:24,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:23:24,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:23:24,810 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 01:23:25,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,080 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 01:23:25,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:25,081 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 01:23:25,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,083 INFO L225 Difference]: With dead ends: 284 [2020-08-22 01:23:25,083 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 01:23:25,085 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:23:25,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 01:23:25,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 01:23:25,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 01:23:25,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 01:23:25,126 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 01:23:25,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,126 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 01:23:25,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:23:25,126 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 01:23:25,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 01:23:25,129 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,129 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 01:23:25,130 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,130 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 01:23:25,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888579634] [2020-08-22 01:23:25,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:25,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:25,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:25,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:25,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,316 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:25,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888579634] [2020-08-22 01:23:25,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:25,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:23:25,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296950632] [2020-08-22 01:23:25,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:23:25,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:23:25,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:25,318 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 01:23:25,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,440 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 01:23:25,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:23:25,441 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 01:23:25,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,443 INFO L225 Difference]: With dead ends: 303 [2020-08-22 01:23:25,443 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 01:23:25,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:25,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 01:23:25,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 01:23:25,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 01:23:25,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 01:23:25,483 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 01:23:25,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,483 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 01:23:25,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:23:25,484 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 01:23:25,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 01:23:25,485 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,486 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 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, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 01:23:25,486 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 01:23:25,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400031494] [2020-08-22 01:23:25,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 01:23:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 01:23:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 01:23:25,629 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400031494] [2020-08-22 01:23:25,629 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,629 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:23:25,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140881628] [2020-08-22 01:23:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:23:25,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:23:25,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:23:25,631 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 01:23:25,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,735 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 01:23:25,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:23:25,736 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 01:23:25,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,737 INFO L225 Difference]: With dead ends: 409 [2020-08-22 01:23:25,737 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 01:23:25,738 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:23:25,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 01:23:25,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 01:23:25,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:25,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 01:23:25,758 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 01:23:25,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,759 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 01:23:25,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:23:25,759 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 01:23:25,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 01:23:25,760 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,760 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 01:23:25,761 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,761 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 01:23:25,761 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [184239305] [2020-08-22 01:23:25,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:25,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:25,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:25,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,966 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 01:23:25,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [184239305] [2020-08-22 01:23:25,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:23:25,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712686992] [2020-08-22 01:23:25,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:23:25,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:23:25,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:23:25,968 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 01:23:26,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:26,112 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-22 01:23:26,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:23:26,113 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 01:23:26,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:26,114 INFO L225 Difference]: With dead ends: 173 [2020-08-22 01:23:26,114 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 01:23:26,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:23:26,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 01:23:26,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 01:23:26,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 01:23:26,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-22 01:23:26,137 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-22 01:23:26,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:26,138 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-22 01:23:26,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:23:26,138 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-22 01:23:26,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 01:23:26,140 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:26,140 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:26,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 01:23:26,140 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:26,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:26,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-22 01:23:26,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:26,141 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155311032] [2020-08-22 01:23:26,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:26,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:26,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:26,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:26,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:26,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,467 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-22 01:23:26,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155311032] [2020-08-22 01:23:26,467 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:26,467 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:23:26,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295593885] [2020-08-22 01:23:26,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:23:26,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:26,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:23:26,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:26,471 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-22 01:23:26,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:26,752 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-22 01:23:26,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:23:26,753 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-22 01:23:26,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:26,754 INFO L225 Difference]: With dead ends: 175 [2020-08-22 01:23:26,754 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 01:23:26,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:23:26,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 01:23:26,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-22 01:23:26,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 01:23:26,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-22 01:23:26,770 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-22 01:23:26,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:26,770 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-22 01:23:26,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:23:26,771 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-22 01:23:26,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:26,772 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:26,772 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:26,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 01:23:26,772 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:26,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:26,772 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-22 01:23:26,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:26,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336996092] [2020-08-22 01:23:26,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:26,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:26,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:26,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:26,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:26,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,072 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-22 01:23:27,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336996092] [2020-08-22 01:23:27,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:27,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-22 01:23:27,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248407959] [2020-08-22 01:23:27,074 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:23:27,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:27,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:23:27,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:23:27,075 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-22 01:23:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:27,297 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-22 01:23:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:27,298 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-22 01:23:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:27,299 INFO L225 Difference]: With dead ends: 184 [2020-08-22 01:23:27,299 INFO L226 Difference]: Without dead ends: 174 [2020-08-22 01:23:27,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:23:27,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-22 01:23:27,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-22 01:23:27,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 01:23:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-22 01:23:27,324 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-22 01:23:27,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:27,325 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-22 01:23:27,325 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:23:27,325 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-22 01:23:27,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:27,326 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:27,327 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:27,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 01:23:27,327 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:27,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:27,327 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-22 01:23:27,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:27,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739891625] [2020-08-22 01:23:27,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:27,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:27,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:27,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:27,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:27,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:27,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:27,658 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:27,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739891625] [2020-08-22 01:23:27,658 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:27,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:23:27,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687722948] [2020-08-22 01:23:27,659 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:23:27,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:27,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:23:27,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:23:27,660 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-22 01:23:27,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:27,876 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-22 01:23:27,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:27,877 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-22 01:23:27,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:27,879 INFO L225 Difference]: With dead ends: 194 [2020-08-22 01:23:27,879 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 01:23:27,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:23:27,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 01:23:27,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 01:23:27,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:27,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 01:23:27,898 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-22 01:23:27,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:27,899 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 01:23:27,899 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:23:27,899 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 01:23:27,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:27,900 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:27,900 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:27,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 01:23:27,901 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:27,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:27,901 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-22 01:23:27,901 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:27,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708325938] [2020-08-22 01:23:27,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:27,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:28,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:28,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:28,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:28,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,240 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 01:23:28,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708325938] [2020-08-22 01:23:28,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:28,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:23:28,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708873828] [2020-08-22 01:23:28,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:28,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:28,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:28,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:28,242 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-22 01:23:28,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:28,573 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-22 01:23:28,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:28,575 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 01:23:28,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:28,576 INFO L225 Difference]: With dead ends: 160 [2020-08-22 01:23:28,576 INFO L226 Difference]: Without dead ends: 140 [2020-08-22 01:23:28,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:28,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-22 01:23:28,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-22 01:23:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:28,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-22 01:23:28,594 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-22 01:23:28,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:28,595 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-22 01:23:28,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:28,595 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-22 01:23:28,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:28,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:28,596 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:28,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 01:23:28,596 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:28,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:28,597 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-22 01:23:28,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:28,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698132171] [2020-08-22 01:23:28,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:28,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:28,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:28,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:28,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:28,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,027 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:29,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698132171] [2020-08-22 01:23:29,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:29,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:23:29,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110092381] [2020-08-22 01:23:29,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:23:29,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:29,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:23:29,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:29,029 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-22 01:23:29,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:29,379 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-22 01:23:29,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:23:29,381 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-22 01:23:29,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:29,382 INFO L225 Difference]: With dead ends: 155 [2020-08-22 01:23:29,383 INFO L226 Difference]: Without dead ends: 137 [2020-08-22 01:23:29,383 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:23:29,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-22 01:23:29,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-22 01:23:29,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 01:23:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-22 01:23:29,396 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-22 01:23:29,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:29,397 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-22 01:23:29,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:23:29,397 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-22 01:23:29,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:29,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:29,398 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:29,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-22 01:23:29,398 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:29,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:29,399 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-22 01:23:29,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:29,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666648424] [2020-08-22 01:23:29,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:29,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:29,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:29,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:29,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:29,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-22 01:23:29,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666648424] [2020-08-22 01:23:29,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:29,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:23:29,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919867282] [2020-08-22 01:23:29,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:29,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:29,712 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-22 01:23:29,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:29,878 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-22 01:23:29,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:29,879 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-22 01:23:29,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:29,880 INFO L225 Difference]: With dead ends: 137 [2020-08-22 01:23:29,880 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:23:29,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:23:29,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:23:29,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:23:29,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:23:29,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:23:29,882 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 01:23:29,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:29,882 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:23:29,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:29,882 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:23:29,883 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:23:29,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-22 01:23:29,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.