/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.4 -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 0.1.25-5644d1e-m [2020-08-19 00:17:48,005 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 00:17:48,008 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 00:17:48,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 00:17:48,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 00:17:48,034 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 00:17:48,035 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 00:17:48,037 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 00:17:48,039 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 00:17:48,040 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 00:17:48,041 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 00:17:48,042 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 00:17:48,043 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 00:17:48,043 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 00:17:48,045 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 00:17:48,046 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 00:17:48,047 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 00:17:48,048 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 00:17:48,050 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 00:17:48,051 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 00:17:48,053 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 00:17:48,054 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 00:17:48,056 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 00:17:48,056 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 00:17:48,059 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 00:17:48,059 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 00:17:48,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 00:17:48,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 00:17:48,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 00:17:48,062 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 00:17:48,067 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 00:17:48,068 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 00:17:48,068 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 00:17:48,069 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 00:17:48,093 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 00:17:48,093 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 00:17:48,095 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 00:17:48,095 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 00:17:48,095 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 00:17:48,095 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 00:17:48,096 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 00:17:48,096 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 00:17:48,096 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 00:17:48,096 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 00:17:48,096 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 00:17:48,097 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 00:17:48,097 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 00:17:48,097 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 00:17:48,097 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 00:17:48,097 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 00:17:48,098 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 00:17:48,098 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 00:17:48,098 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 00:17:48,098 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 00:17:48,099 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 00:17:48,099 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:17:48,099 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 00:17:48,099 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 00:17:48,099 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 00:17:48,100 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 00:17:48,100 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 00:17:48,100 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 00:17:48,100 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 00:17:48,100 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.4; [2020-08-19 00:17:48,466 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 00:17:48,483 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 00:17:48,487 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 00:17:48,489 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 00:17:48,490 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 00:17:48,491 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 00:17:48,562 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78706dd24/915b10f59a4943a6b5d7f10aaac90a1e/FLAGd12100694 [2020-08-19 00:17:49,063 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 00:17:49,065 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 00:17:49,073 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78706dd24/915b10f59a4943a6b5d7f10aaac90a1e/FLAGd12100694 [2020-08-19 00:17:49,408 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/78706dd24/915b10f59a4943a6b5d7f10aaac90a1e [2020-08-19 00:17:49,417 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 00:17:49,419 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 00:17:49,420 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:49,421 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 00:17:49,424 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 00:17:49,426 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,429 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@69fc9fb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49, skipping insertion in model container [2020-08-19 00:17:49,429 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 00:17:49,470 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 00:17:49,720 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:49,725 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 00:17:49,852 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 00:17:49,866 INFO L208 MainTranslator]: Completed translation [2020-08-19 00:17:49,866 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49 WrapperNode [2020-08-19 00:17:49,866 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 00:17:49,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 00:17:49,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 00:17:49,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 00:17:49,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,890 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,890 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,900 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,908 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,910 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... [2020-08-19 00:17:49,913 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 00:17:49,914 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 00:17:49,914 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 00:17:49,914 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 00:17:49,915 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 00:17:49,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 00:17:49,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 00:17:49,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 00:17:49,980 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 00:17:49,980 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 00:17:49,980 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 00:17:49,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 00:17:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 00:17:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 00:17:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 00:17:49,981 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 00:17:49,982 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 00:17:50,430 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 00:17:50,430 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 00:17:50,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:50 BoogieIcfgContainer [2020-08-19 00:17:50,436 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 00:17:50,437 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 00:17:50,437 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 00:17:50,440 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 00:17:50,440 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 12:17:49" (1/3) ... [2020-08-19 00:17:50,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a42acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:50, skipping insertion in model container [2020-08-19 00:17:50,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 12:17:49" (2/3) ... [2020-08-19 00:17:50,441 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@39a42acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 12:17:50, skipping insertion in model container [2020-08-19 00:17:50,441 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 12:17:50" (3/3) ... [2020-08-19 00:17:50,443 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-19 00:17:50,451 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 00:17:50,458 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 00:17:50,470 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 00:17:50,491 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 00:17:50,491 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 00:17:50,492 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 00:17:50,492 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 00:17:50,492 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 00:17:50,492 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 00:17:50,492 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 00:17:50,492 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 00:17:50,511 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-19 00:17:50,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 00:17:50,519 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:50,521 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] [2020-08-19 00:17:50,521 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:50,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:50,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-19 00:17:50,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:50,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1297769728] [2020-08-19 00:17:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:50,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:50,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 00:17:50,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 00:17:50,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 00:17:50,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:50,985 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:50,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1297769728] [2020-08-19 00:17:50,991 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:50,992 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 00:17:50,993 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026940886] [2020-08-19 00:17:51,000 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 00:17:51,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:51,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 00:17:51,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 00:17:51,025 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-19 00:17:51,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:51,242 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-19 00:17:51,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:17:51,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-19 00:17:51,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:51,258 INFO L225 Difference]: With dead ends: 136 [2020-08-19 00:17:51,258 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 00:17:51,263 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 [2020-08-19 00:17:51,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 00:17:51,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-19 00:17:51,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 00:17:51,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-19 00:17:51,321 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-19 00:17:51,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:51,322 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-19 00:17:51,322 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 00:17:51,322 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-19 00:17:51,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 00:17:51,325 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:51,326 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] [2020-08-19 00:17:51,326 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 00:17:51,326 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:51,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:51,327 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-19 00:17:51,327 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:51,328 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1736409471] [2020-08-19 00:17:51,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:51,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 00:17:51,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 00:17:51,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:17:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,485 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:51,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1736409471] [2020-08-19 00:17:51,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:51,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 00:17:51,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31623198] [2020-08-19 00:17:51,488 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 00:17:51,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:51,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 00:17:51,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 00:17:51,489 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-19 00:17:51,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:51,578 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-19 00:17:51,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 00:17:51,579 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-19 00:17:51,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:51,582 INFO L225 Difference]: With dead ends: 129 [2020-08-19 00:17:51,582 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 00:17:51,584 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 [2020-08-19 00:17:51,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 00:17:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-19 00:17:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 00:17:51,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-19 00:17:51,621 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-19 00:17:51,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:51,621 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-19 00:17:51,622 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 00:17:51,622 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-19 00:17:51,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 00:17:51,626 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:51,627 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] [2020-08-19 00:17:51,627 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 00:17:51,627 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:51,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:51,628 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-19 00:17:51,628 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:51,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537413905] [2020-08-19 00:17:51,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:51,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:51,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:51,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 00:17:51,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 00:17:51,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 00:17:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:51,874 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:51,874 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537413905] [2020-08-19 00:17:51,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:51,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 00:17:51,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063246327] [2020-08-19 00:17:51,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:17:51,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:51,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:17:51,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:17:51,876 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-19 00:17:51,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:51,993 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-19 00:17:51,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:17:51,993 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-19 00:17:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:51,996 INFO L225 Difference]: With dead ends: 145 [2020-08-19 00:17:51,996 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 00:17:51,997 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 [2020-08-19 00:17:51,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 00:17:52,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-19 00:17:52,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 00:17:52,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-19 00:17:52,012 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-19 00:17:52,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:52,012 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-19 00:17:52,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:17:52,013 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-19 00:17:52,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 00:17:52,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:52,015 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] [2020-08-19 00:17:52,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 00:17:52,015 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:52,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:52,015 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-19 00:17:52,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:52,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1793836757] [2020-08-19 00:17:52,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:52,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:52,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:52,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:52,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 00:17:52,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 00:17:52,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 00:17:52,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:52,112 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1793836757] [2020-08-19 00:17:52,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:52,112 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 00:17:52,113 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158495380] [2020-08-19 00:17:52,113 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:17:52,113 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:52,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:17:52,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:17:52,114 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-19 00:17:52,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:52,204 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-19 00:17:52,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:17:52,204 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-19 00:17:52,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:52,206 INFO L225 Difference]: With dead ends: 156 [2020-08-19 00:17:52,207 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 00:17:52,208 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 [2020-08-19 00:17:52,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 00:17:52,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-19 00:17:52,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 00:17:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-19 00:17:52,221 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-19 00:17:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:52,222 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-19 00:17:52,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:17:52,222 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-19 00:17:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 00:17:52,224 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:52,225 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] [2020-08-19 00:17:52,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 00:17:52,225 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:52,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:52,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-19 00:17:52,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:52,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [60529287] [2020-08-19 00:17:52,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:52,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,256 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:52,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:52,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 00:17:52,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 00:17:52,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 00:17:52,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,375 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:52,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [60529287] [2020-08-19 00:17:52,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:52,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 00:17:52,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346804267] [2020-08-19 00:17:52,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:17:52,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:52,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:17:52,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:17:52,378 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-19 00:17:52,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:52,508 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-19 00:17:52,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:17:52,510 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-19 00:17:52,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:52,511 INFO L225 Difference]: With dead ends: 166 [2020-08-19 00:17:52,512 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 00:17:52,515 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 [2020-08-19 00:17:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 00:17:52,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-19 00:17:52,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 00:17:52,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-19 00:17:52,531 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-19 00:17:52,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:52,531 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-19 00:17:52,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:17:52,532 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-19 00:17:52,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 00:17:52,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:52,534 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] [2020-08-19 00:17:52,534 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 00:17:52,534 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:52,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:52,535 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-19 00:17:52,535 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:52,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [728410682] [2020-08-19 00:17:52,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:52,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:52,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 00:17:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 00:17:52,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 00:17:52,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,653 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:52,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [728410682] [2020-08-19 00:17:52,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:52,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 00:17:52,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53737661] [2020-08-19 00:17:52,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:17:52,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:52,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:17:52,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:17:52,656 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-19 00:17:52,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:52,764 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 00:17:52,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 00:17:52,764 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 00:17:52,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:52,766 INFO L225 Difference]: With dead ends: 176 [2020-08-19 00:17:52,766 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 00:17:52,767 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 [2020-08-19 00:17:52,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 00:17:52,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-19 00:17:52,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 00:17:52,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-19 00:17:52,780 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-19 00:17:52,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:52,781 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-19 00:17:52,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:17:52,781 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-19 00:17:52,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 00:17:52,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:52,783 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] [2020-08-19 00:17:52,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 00:17:52,784 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:52,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:52,784 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-19 00:17:52,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:52,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039139595] [2020-08-19 00:17:52,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:52,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:52,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:52,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 00:17:52,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:17:52,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 00:17:52,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:52,953 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:52,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039139595] [2020-08-19 00:17:52,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:52,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:17:52,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [526093725] [2020-08-19 00:17:52,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:17:52,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:52,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:17:52,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:17:52,956 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-19 00:17:53,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:53,107 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-19 00:17:53,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 00:17:53,109 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-19 00:17:53,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:53,110 INFO L225 Difference]: With dead ends: 178 [2020-08-19 00:17:53,111 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 00:17:53,111 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 [2020-08-19 00:17:53,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 00:17:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-19 00:17:53,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 00:17:53,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-19 00:17:53,123 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-19 00:17:53,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:53,124 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-19 00:17:53,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:17:53,124 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-19 00:17:53,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 00:17:53,125 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:53,125 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] [2020-08-19 00:17:53,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 00:17:53,126 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:53,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:53,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-19 00:17:53,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:53,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718445964] [2020-08-19 00:17:53,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:53,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:53,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:53,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:53,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 00:17:53,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 00:17:53,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 00:17:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,233 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:53,234 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718445964] [2020-08-19 00:17:53,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:53,235 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 00:17:53,235 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003350046] [2020-08-19 00:17:53,235 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 00:17:53,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:53,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 00:17:53,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 00:17:53,236 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-19 00:17:53,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:53,335 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-19 00:17:53,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 00:17:53,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-19 00:17:53,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:53,338 INFO L225 Difference]: With dead ends: 193 [2020-08-19 00:17:53,338 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 00:17:53,339 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 [2020-08-19 00:17:53,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 00:17:53,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-19 00:17:53,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 00:17:53,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-19 00:17:53,349 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-19 00:17:53,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:53,350 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-19 00:17:53,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 00:17:53,350 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-19 00:17:53,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 00:17:53,352 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:53,352 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] [2020-08-19 00:17:53,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 00:17:53,352 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:53,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:53,353 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-19 00:17:53,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:53,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793245222] [2020-08-19 00:17:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:53,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:53,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 00:17:53,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 00:17:53,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 00:17:53,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,515 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:53,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793245222] [2020-08-19 00:17:53,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:53,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:17:53,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658258764] [2020-08-19 00:17:53,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:17:53,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:53,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:17:53,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:17:53,518 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-19 00:17:53,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:53,708 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-19 00:17:53,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:17:53,709 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-19 00:17:53,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:53,711 INFO L225 Difference]: With dead ends: 190 [2020-08-19 00:17:53,711 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 00:17:53,712 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 [2020-08-19 00:17:53,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 00:17:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-19 00:17:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 00:17:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-19 00:17:53,723 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-19 00:17:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:53,724 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-19 00:17:53,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:17:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-19 00:17:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 00:17:53,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:53,726 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] [2020-08-19 00:17:53,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 00:17:53,726 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:53,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:53,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-19 00:17:53,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:53,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252887516] [2020-08-19 00:17:53,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:53,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:53,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:53,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 00:17:53,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 00:17:53,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:17:53,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:53,884 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:53,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252887516] [2020-08-19 00:17:53,886 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:53,886 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 00:17:53,886 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701519772] [2020-08-19 00:17:53,887 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:17:53,887 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:53,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:17:53,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:17:53,888 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-19 00:17:53,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:53,997 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-19 00:17:53,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:17:53,999 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 00:17:54,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:54,002 INFO L225 Difference]: With dead ends: 210 [2020-08-19 00:17:54,003 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 00:17:54,004 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 [2020-08-19 00:17:54,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 00:17:54,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-19 00:17:54,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 00:17:54,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-19 00:17:54,018 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-19 00:17:54,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:54,018 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-19 00:17:54,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:17:54,018 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-19 00:17:54,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 00:17:54,020 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:54,020 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] [2020-08-19 00:17:54,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 00:17:54,020 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:54,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:54,021 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-19 00:17:54,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:54,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2114749891] [2020-08-19 00:17:54,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:54,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:54,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,218 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 00:17:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 00:17:54,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 00:17:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:54,237 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2114749891] [2020-08-19 00:17:54,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:54,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:17:54,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414307451] [2020-08-19 00:17:54,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:17:54,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:54,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:17:54,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:17:54,239 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-19 00:17:54,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:54,383 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-19 00:17:54,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:17:54,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-19 00:17:54,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:54,385 INFO L225 Difference]: With dead ends: 202 [2020-08-19 00:17:54,385 INFO L226 Difference]: Without dead ends: 133 [2020-08-19 00:17:54,386 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 [2020-08-19 00:17:54,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-19 00:17:54,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-19 00:17:54,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-19 00:17:54,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-19 00:17:54,396 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-19 00:17:54,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:54,397 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-19 00:17:54,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:17:54,397 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-19 00:17:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 00:17:54,398 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:54,398 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] [2020-08-19 00:17:54,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 00:17:54,399 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-19 00:17:54,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:54,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1611406485] [2020-08-19 00:17:54,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:54,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:54,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 00:17:54,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 00:17:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 00:17:54,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,543 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:54,543 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1611406485] [2020-08-19 00:17:54,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:54,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:17:54,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284273357] [2020-08-19 00:17:54,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:17:54,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:54,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:17:54,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:17:54,546 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-19 00:17:54,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:54,662 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-19 00:17:54,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:17:54,663 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 00:17:54,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:54,665 INFO L225 Difference]: With dead ends: 227 [2020-08-19 00:17:54,665 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 00:17:54,667 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 [2020-08-19 00:17:54,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 00:17:54,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-19 00:17:54,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 00:17:54,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-19 00:17:54,678 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-19 00:17:54,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:54,678 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-19 00:17:54,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:17:54,678 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-19 00:17:54,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 00:17:54,680 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:54,680 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] [2020-08-19 00:17:54,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 00:17:54,681 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:54,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:54,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-19 00:17:54,682 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:54,682 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321537419] [2020-08-19 00:17:54,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:54,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:54,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 00:17:54,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 00:17:54,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 00:17:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:54,870 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:54,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321537419] [2020-08-19 00:17:54,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:54,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:17:54,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659847821] [2020-08-19 00:17:54,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:17:54,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:54,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:17:54,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:17:54,872 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-19 00:17:55,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:55,094 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-19 00:17:55,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:17:55,095 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 00:17:55,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:55,097 INFO L225 Difference]: With dead ends: 214 [2020-08-19 00:17:55,097 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 00:17:55,098 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 [2020-08-19 00:17:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 00:17:55,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-19 00:17:55,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 00:17:55,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-19 00:17:55,110 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-19 00:17:55,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:55,111 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-19 00:17:55,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:17:55,111 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-19 00:17:55,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 00:17:55,112 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:55,113 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] [2020-08-19 00:17:55,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 00:17:55,113 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:55,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:55,114 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-19 00:17:55,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:55,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88685023] [2020-08-19 00:17:55,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:55,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:55,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 00:17:55,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 00:17:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 00:17:55,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,243 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:55,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88685023] [2020-08-19 00:17:55,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:55,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:17:55,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477269366] [2020-08-19 00:17:55,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:17:55,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:55,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:17:55,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:17:55,245 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-19 00:17:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:55,384 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-19 00:17:55,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 00:17:55,384 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-19 00:17:55,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:55,386 INFO L225 Difference]: With dead ends: 244 [2020-08-19 00:17:55,387 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 00:17:55,388 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 [2020-08-19 00:17:55,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 00:17:55,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-19 00:17:55,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 00:17:55,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-19 00:17:55,401 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-19 00:17:55,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:55,401 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-19 00:17:55,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:17:55,402 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-19 00:17:55,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 00:17:55,403 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:55,404 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] [2020-08-19 00:17:55,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 00:17:55,404 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:55,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:55,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-19 00:17:55,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:55,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730232546] [2020-08-19 00:17:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:55,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:55,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:55,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 00:17:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:17:55,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 00:17:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,644 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:55,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730232546] [2020-08-19 00:17:55,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:55,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:17:55,645 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986186349] [2020-08-19 00:17:55,645 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:17:55,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:55,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:17:55,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:17:55,647 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-19 00:17:55,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:55,900 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-19 00:17:55,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:17:55,900 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-19 00:17:55,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:55,903 INFO L225 Difference]: With dead ends: 226 [2020-08-19 00:17:55,903 INFO L226 Difference]: Without dead ends: 151 [2020-08-19 00:17:55,905 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 [2020-08-19 00:17:55,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-19 00:17:55,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-19 00:17:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 00:17:55,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-19 00:17:55,920 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-19 00:17:55,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:55,920 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-19 00:17:55,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:17:55,921 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-19 00:17:55,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 00:17:55,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:55,922 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] [2020-08-19 00:17:55,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 00:17:55,922 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:55,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:55,923 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-19 00:17:55,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:55,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1407504798] [2020-08-19 00:17:55,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:55,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:55,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:55,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:55,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 00:17:56,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 00:17:56,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 00:17:56,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:56,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1407504798] [2020-08-19 00:17:56,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:56,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:17:56,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79479997] [2020-08-19 00:17:56,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:17:56,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:17:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:17:56,071 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-19 00:17:56,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:56,188 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-19 00:17:56,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 00:17:56,190 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-19 00:17:56,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:56,191 INFO L225 Difference]: With dead ends: 261 [2020-08-19 00:17:56,191 INFO L226 Difference]: Without dead ends: 180 [2020-08-19 00:17:56,192 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 [2020-08-19 00:17:56,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-19 00:17:56,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-19 00:17:56,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-19 00:17:56,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-19 00:17:56,203 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-19 00:17:56,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:56,203 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-19 00:17:56,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:17:56,203 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-19 00:17:56,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 00:17:56,204 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:56,205 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] [2020-08-19 00:17:56,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 00:17:56,205 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:56,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:56,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-19 00:17:56,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:56,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61490869] [2020-08-19 00:17:56,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:56,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:56,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:56,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:56,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 00:17:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 00:17:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 00:17:56,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,455 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:56,455 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61490869] [2020-08-19 00:17:56,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:56,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:17:56,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420044173] [2020-08-19 00:17:56,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:17:56,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:56,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:17:56,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:17:56,458 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-19 00:17:56,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:56,717 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-19 00:17:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:17:56,718 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 00:17:56,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:56,720 INFO L225 Difference]: With dead ends: 238 [2020-08-19 00:17:56,720 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 00:17:56,721 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 [2020-08-19 00:17:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 00:17:56,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-19 00:17:56,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 00:17:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-19 00:17:56,731 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-19 00:17:56,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:56,732 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-19 00:17:56,732 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:17:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-19 00:17:56,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 00:17:56,733 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:56,733 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] [2020-08-19 00:17:56,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 00:17:56,734 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:56,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:56,734 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-19 00:17:56,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:56,735 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626927705] [2020-08-19 00:17:56,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:56,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:56,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:56,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 00:17:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,889 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 00:17:56,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:17:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:56,912 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:56,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626927705] [2020-08-19 00:17:56,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:56,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:17:56,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930760175] [2020-08-19 00:17:56,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:17:56,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:56,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:17:56,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:17:56,921 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-19 00:17:57,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:57,072 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-19 00:17:57,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:17:57,073 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-19 00:17:57,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:57,074 INFO L225 Difference]: With dead ends: 278 [2020-08-19 00:17:57,074 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 00:17:57,075 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 [2020-08-19 00:17:57,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 00:17:57,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-19 00:17:57,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 00:17:57,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-19 00:17:57,086 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-19 00:17:57,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:57,086 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-19 00:17:57,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:17:57,087 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-19 00:17:57,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 00:17:57,089 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:57,089 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] [2020-08-19 00:17:57,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 00:17:57,089 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:57,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:57,090 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-19 00:17:57,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:57,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730092775] [2020-08-19 00:17:57,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:57,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:57,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:57,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 00:17:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 00:17:57,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 00:17:57,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,380 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:57,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730092775] [2020-08-19 00:17:57,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:57,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:17:57,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638817209] [2020-08-19 00:17:57,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:17:57,382 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:57,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:17:57,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:17:57,382 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-19 00:17:57,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:57,690 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-19 00:17:57,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:17:57,691 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-19 00:17:57,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:57,692 INFO L225 Difference]: With dead ends: 250 [2020-08-19 00:17:57,692 INFO L226 Difference]: Without dead ends: 169 [2020-08-19 00:17:57,693 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 [2020-08-19 00:17:57,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-19 00:17:57,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-19 00:17:57,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 00:17:57,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-19 00:17:57,704 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-19 00:17:57,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:57,705 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-19 00:17:57,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:17:57,705 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-19 00:17:57,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 00:17:57,706 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:57,706 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] [2020-08-19 00:17:57,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 00:17:57,706 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:57,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:57,707 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-19 00:17:57,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:57,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1465588138] [2020-08-19 00:17:57,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:57,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:57,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:57,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:57,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 00:17:57,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-19 00:17:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:17:57,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:57,900 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:57,900 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1465588138] [2020-08-19 00:17:57,900 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:57,901 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:17:57,901 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489977135] [2020-08-19 00:17:57,902 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:17:57,902 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:57,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:17:57,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:17:57,903 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-19 00:17:58,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:58,046 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-19 00:17:58,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 00:17:58,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-19 00:17:58,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:58,049 INFO L225 Difference]: With dead ends: 295 [2020-08-19 00:17:58,049 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 00:17:58,050 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 [2020-08-19 00:17:58,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 00:17:58,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-19 00:17:58,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 00:17:58,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-19 00:17:58,061 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-19 00:17:58,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:58,061 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-19 00:17:58,061 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:17:58,061 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-19 00:17:58,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 00:17:58,063 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:58,063 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] [2020-08-19 00:17:58,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 00:17:58,063 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:58,064 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-19 00:17:58,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:58,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1537164960] [2020-08-19 00:17:58,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:58,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:58,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:58,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 00:17:58,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,332 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 00:17:58,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 00:17:58,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:58,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1537164960] [2020-08-19 00:17:58,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:58,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 00:17:58,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74490353] [2020-08-19 00:17:58,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 00:17:58,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:58,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 00:17:58,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:17:58,351 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-19 00:17:58,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:58,715 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-19 00:17:58,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:17:58,716 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-19 00:17:58,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:58,717 INFO L225 Difference]: With dead ends: 262 [2020-08-19 00:17:58,718 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 00:17:58,718 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 [2020-08-19 00:17:58,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 00:17:58,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-19 00:17:58,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-19 00:17:58,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-19 00:17:58,749 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-19 00:17:58,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:58,749 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-19 00:17:58,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 00:17:58,750 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-19 00:17:58,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 00:17:58,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:58,751 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] [2020-08-19 00:17:58,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 00:17:58,752 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:58,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:58,752 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-19 00:17:58,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:58,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325595873] [2020-08-19 00:17:58,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:58,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:58,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:58,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:58,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 00:17:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 00:17:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 00:17:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:58,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325595873] [2020-08-19 00:17:58,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:58,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 00:17:58,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236139143] [2020-08-19 00:17:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 00:17:58,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:58,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 00:17:58,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 00:17:58,936 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-19 00:17:59,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:17:59,166 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-19 00:17:59,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:17:59,168 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-19 00:17:59,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:17:59,171 INFO L225 Difference]: With dead ends: 312 [2020-08-19 00:17:59,171 INFO L226 Difference]: Without dead ends: 222 [2020-08-19 00:17:59,172 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 [2020-08-19 00:17:59,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-19 00:17:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-19 00:17:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 00:17:59,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-19 00:17:59,190 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-19 00:17:59,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:17:59,191 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-19 00:17:59,191 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 00:17:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-19 00:17:59,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 00:17:59,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:17:59,194 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] [2020-08-19 00:17:59,194 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 00:17:59,194 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:17:59,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:17:59,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-19 00:17:59,195 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:17:59,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017477462] [2020-08-19 00:17:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:17:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:17:59,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:17:59,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:17:59,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 00:17:59,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:17:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 00:17:59,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:17:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:17:59,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017477462] [2020-08-19 00:17:59,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:17:59,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 00:17:59,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104223435] [2020-08-19 00:17:59,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 00:17:59,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:17:59,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 00:17:59,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:17:59,603 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-19 00:18:00,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,098 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-19 00:18:00,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:18:00,098 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-19 00:18:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,100 INFO L225 Difference]: With dead ends: 274 [2020-08-19 00:18:00,100 INFO L226 Difference]: Without dead ends: 187 [2020-08-19 00:18:00,101 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:18:00,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-19 00:18:00,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-19 00:18:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-19 00:18:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-19 00:18:00,119 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-19 00:18:00,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,120 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-19 00:18:00,120 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 00:18:00,120 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-19 00:18:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 00:18:00,121 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,121 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] [2020-08-19 00:18:00,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 00:18:00,122 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,122 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-19 00:18:00,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1155263465] [2020-08-19 00:18:00,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:00,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 00:18:00,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 00:18:00,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 00:18:00,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,362 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:00,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1155263465] [2020-08-19 00:18:00,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:00,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 00:18:00,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036054331] [2020-08-19 00:18:00,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 00:18:00,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:00,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 00:18:00,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 00:18:00,364 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-19 00:18:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:00,545 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-19 00:18:00,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 00:18:00,545 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-19 00:18:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:00,547 INFO L225 Difference]: With dead ends: 329 [2020-08-19 00:18:00,548 INFO L226 Difference]: Without dead ends: 236 [2020-08-19 00:18:00,549 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 [2020-08-19 00:18:00,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-19 00:18:00,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-19 00:18:00,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-19 00:18:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-19 00:18:00,566 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-19 00:18:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:00,566 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-19 00:18:00,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 00:18:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-19 00:18:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 00:18:00,568 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:00,568 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] [2020-08-19 00:18:00,569 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 00:18:00,571 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:00,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:00,571 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-19 00:18:00,571 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:00,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009047485] [2020-08-19 00:18:00,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:00,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:00,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:00,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 00:18:00,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:18:00,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:00,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 00:18:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,009 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:01,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009047485] [2020-08-19 00:18:01,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:01,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 00:18:01,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512728195] [2020-08-19 00:18:01,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 00:18:01,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:01,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 00:18:01,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:18:01,012 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-19 00:18:01,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:01,463 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-19 00:18:01,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:18:01,464 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-19 00:18:01,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:01,465 INFO L225 Difference]: With dead ends: 286 [2020-08-19 00:18:01,466 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 00:18:01,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:18:01,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 00:18:01,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-19 00:18:01,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 00:18:01,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-19 00:18:01,483 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-19 00:18:01,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:01,484 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-19 00:18:01,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 00:18:01,484 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-19 00:18:01,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 00:18:01,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:01,486 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] [2020-08-19 00:18:01,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 00:18:01,486 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:01,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:01,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-19 00:18:01,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:01,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871098299] [2020-08-19 00:18:01,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:01,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:01,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 00:18:01,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,776 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 00:18:01,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 00:18:01,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:01,797 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:01,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871098299] [2020-08-19 00:18:01,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:01,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 00:18:01,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635299241] [2020-08-19 00:18:01,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 00:18:01,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:01,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 00:18:01,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 00:18:01,802 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-19 00:18:02,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:02,025 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-19 00:18:02,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 00:18:02,026 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-19 00:18:02,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:02,028 INFO L225 Difference]: With dead ends: 346 [2020-08-19 00:18:02,028 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 00:18:02,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:18:02,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 00:18:02,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-19 00:18:02,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 00:18:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-19 00:18:02,047 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-19 00:18:02,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:02,048 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-19 00:18:02,048 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 00:18:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-19 00:18:02,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 00:18:02,049 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:02,049 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] [2020-08-19 00:18:02,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 00:18:02,050 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:02,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:02,050 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-19 00:18:02,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:02,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718430835] [2020-08-19 00:18:02,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:02,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:02,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 00:18:02,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 00:18:02,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 00:18:02,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,129 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 00:18:02,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718430835] [2020-08-19 00:18:02,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:02,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 00:18:02,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270768232] [2020-08-19 00:18:02,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 00:18:02,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:02,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 00:18:02,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 00:18:02,132 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-19 00:18:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:02,144 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-19 00:18:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 00:18:02,145 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-19 00:18:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:02,146 INFO L225 Difference]: With dead ends: 160 [2020-08-19 00:18:02,147 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 00:18:02,147 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 [2020-08-19 00:18:02,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 00:18:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 00:18:02,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 00:18:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-19 00:18:02,165 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-19 00:18:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:02,166 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-19 00:18:02,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 00:18:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-19 00:18:02,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 00:18:02,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:02,168 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] [2020-08-19 00:18:02,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 00:18:02,168 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:02,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:02,168 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-19 00:18:02,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:02,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [67998858] [2020-08-19 00:18:02,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:02,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:02,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:02,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 00:18:02,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 00:18:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 00:18:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,240 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 00:18:02,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [67998858] [2020-08-19 00:18:02,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:02,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 00:18:02,241 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538493591] [2020-08-19 00:18:02,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 00:18:02,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:02,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 00:18:02,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 00:18:02,242 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-19 00:18:02,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:02,268 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-19 00:18:02,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 00:18:02,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-19 00:18:02,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:02,270 INFO L225 Difference]: With dead ends: 161 [2020-08-19 00:18:02,270 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 00:18:02,271 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 [2020-08-19 00:18:02,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 00:18:02,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 00:18:02,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 00:18:02,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-19 00:18:02,288 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-19 00:18:02,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:02,288 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-19 00:18:02,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 00:18:02,288 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-19 00:18:02,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 00:18:02,290 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:02,290 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] [2020-08-19 00:18:02,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 00:18:02,291 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:02,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:02,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-19 00:18:02,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:02,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [645759816] [2020-08-19 00:18:02,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:02,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 00:18:02,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 00:18:02,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 00:18:02,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:02,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [645759816] [2020-08-19 00:18:02,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:02,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 00:18:02,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862207231] [2020-08-19 00:18:02,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 00:18:02,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:02,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 00:18:02,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:18:02,691 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-19 00:18:03,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:03,309 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-19 00:18:03,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:18:03,310 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-19 00:18:03,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:03,314 INFO L225 Difference]: With dead ends: 298 [2020-08-19 00:18:03,314 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 00:18:03,317 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:18:03,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 00:18:03,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-19 00:18:03,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-19 00:18:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-19 00:18:03,336 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-19 00:18:03,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:03,336 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-19 00:18:03,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 00:18:03,336 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-19 00:18:03,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 00:18:03,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:03,338 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] [2020-08-19 00:18:03,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 00:18:03,338 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:03,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:03,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-19 00:18:03,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:03,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378030860] [2020-08-19 00:18:03,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:03,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:03,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:03,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:03,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 00:18:03,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-19 00:18:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 00:18:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:03,674 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:03,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378030860] [2020-08-19 00:18:03,675 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:03,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 00:18:03,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313925732] [2020-08-19 00:18:03,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 00:18:03,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:03,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 00:18:03,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 00:18:03,677 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-19 00:18:04,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:04,004 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-19 00:18:04,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 00:18:04,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-19 00:18:04,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:04,008 INFO L225 Difference]: With dead ends: 363 [2020-08-19 00:18:04,008 INFO L226 Difference]: Without dead ends: 264 [2020-08-19 00:18:04,011 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 [2020-08-19 00:18:04,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-19 00:18:04,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-19 00:18:04,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-19 00:18:04,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-19 00:18:04,039 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-19 00:18:04,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:04,039 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-19 00:18:04,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 00:18:04,040 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-19 00:18:04,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 00:18:04,041 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:04,041 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] [2020-08-19 00:18:04,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 00:18:04,042 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:04,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:04,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-19 00:18:04,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:04,042 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744637816] [2020-08-19 00:18:04,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:04,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,088 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:04,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:04,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 00:18:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 00:18:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 00:18:04,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:04,475 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:04,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744637816] [2020-08-19 00:18:04,476 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:04,476 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 00:18:04,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002132119] [2020-08-19 00:18:04,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 00:18:04,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:04,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 00:18:04,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:18:04,477 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-19 00:18:05,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:05,090 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-19 00:18:05,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:18:05,091 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-19 00:18:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:05,092 INFO L225 Difference]: With dead ends: 310 [2020-08-19 00:18:05,092 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 00:18:05,093 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:18:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 00:18:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-19 00:18:05,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 00:18:05,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-19 00:18:05,107 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-19 00:18:05,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:05,107 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-19 00:18:05,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 00:18:05,107 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-19 00:18:05,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-19 00:18:05,109 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:05,109 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] [2020-08-19 00:18:05,109 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 00:18:05,109 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:05,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:05,110 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-19 00:18:05,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:05,110 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512088740] [2020-08-19 00:18:05,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:05,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 00:18:05,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 00:18:05,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 00:18:05,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,408 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:05,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512088740] [2020-08-19 00:18:05,408 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:05,409 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 00:18:05,409 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768898265] [2020-08-19 00:18:05,409 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 00:18:05,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:05,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 00:18:05,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 00:18:05,410 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-19 00:18:05,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:05,608 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-19 00:18:05,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 00:18:05,608 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-19 00:18:05,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:05,611 INFO L225 Difference]: With dead ends: 380 [2020-08-19 00:18:05,611 INFO L226 Difference]: Without dead ends: 278 [2020-08-19 00:18:05,612 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 [2020-08-19 00:18:05,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-19 00:18:05,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-19 00:18:05,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-19 00:18:05,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-19 00:18:05,627 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-19 00:18:05,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:05,627 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-19 00:18:05,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 00:18:05,628 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-19 00:18:05,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 00:18:05,629 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:05,629 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] [2020-08-19 00:18:05,629 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 00:18:05,629 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:05,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:05,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-19 00:18:05,630 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:05,630 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1165592257] [2020-08-19 00:18:05,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:05,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:05,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,663 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:05,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:05,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 00:18:06,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 00:18:06,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 00:18:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:06,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1165592257] [2020-08-19 00:18:06,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:06,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 00:18:06,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662298619] [2020-08-19 00:18:06,142 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 00:18:06,142 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:06,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 00:18:06,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:18:06,143 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-19 00:18:06,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:06,855 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-19 00:18:06,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 00:18:06,856 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 00:18:06,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:06,864 INFO L225 Difference]: With dead ends: 322 [2020-08-19 00:18:06,864 INFO L226 Difference]: Without dead ends: 223 [2020-08-19 00:18:06,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:18:06,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-19 00:18:06,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-19 00:18:06,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-19 00:18:06,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-19 00:18:06,886 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-19 00:18:06,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:06,886 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-19 00:18:06,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 00:18:06,886 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-19 00:18:06,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 00:18:06,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:06,888 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] [2020-08-19 00:18:06,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 00:18:06,888 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:06,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:06,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-19 00:18:06,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:06,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [402518068] [2020-08-19 00:18:06,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:06,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:06,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:06,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:06,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 00:18:07,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 00:18:07,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 00:18:07,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,314 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:07,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [402518068] [2020-08-19 00:18:07,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:07,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 00:18:07,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679716764] [2020-08-19 00:18:07,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 00:18:07,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:07,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 00:18:07,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 00:18:07,318 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-19 00:18:07,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:07,690 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-19 00:18:07,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 00:18:07,690 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-19 00:18:07,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:07,693 INFO L225 Difference]: With dead ends: 397 [2020-08-19 00:18:07,693 INFO L226 Difference]: Without dead ends: 292 [2020-08-19 00:18:07,695 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 [2020-08-19 00:18:07,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-19 00:18:07,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-19 00:18:07,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-19 00:18:07,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-19 00:18:07,716 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-19 00:18:07,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:07,717 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-19 00:18:07,717 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 00:18:07,717 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-19 00:18:07,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 00:18:07,718 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:07,719 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] [2020-08-19 00:18:07,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 00:18:07,719 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:07,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:07,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-19 00:18:07,721 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:07,723 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548151483] [2020-08-19 00:18:07,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:07,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:07,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:07,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 00:18:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 00:18:08,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 00:18:08,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,210 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:08,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548151483] [2020-08-19 00:18:08,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:08,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 00:18:08,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358760331] [2020-08-19 00:18:08,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 00:18:08,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:08,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 00:18:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:18:08,213 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-19 00:18:08,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:08,939 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-19 00:18:08,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 00:18:08,940 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-19 00:18:08,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:08,942 INFO L225 Difference]: With dead ends: 334 [2020-08-19 00:18:08,942 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 00:18:08,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:18:08,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 00:18:08,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-19 00:18:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 00:18:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-19 00:18:08,960 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-19 00:18:08,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:08,960 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-19 00:18:08,960 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 00:18:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-19 00:18:08,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-19 00:18:08,962 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:08,962 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] [2020-08-19 00:18:08,962 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 00:18:08,963 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:08,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:08,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-19 00:18:08,963 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:08,963 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859658316] [2020-08-19 00:18:08,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,993 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:08,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:08,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:08,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:09,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 00:18:09,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 00:18:09,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 00:18:09,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,335 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:09,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859658316] [2020-08-19 00:18:09,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:09,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 00:18:09,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019481025] [2020-08-19 00:18:09,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 00:18:09,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:09,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 00:18:09,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 00:18:09,338 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-19 00:18:09,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:09,670 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-19 00:18:09,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 00:18:09,670 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-19 00:18:09,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:09,673 INFO L225 Difference]: With dead ends: 414 [2020-08-19 00:18:09,673 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 00:18:09,674 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 [2020-08-19 00:18:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 00:18:09,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-19 00:18:09,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-19 00:18:09,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-19 00:18:09,692 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-19 00:18:09,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:09,693 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-19 00:18:09,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 00:18:09,693 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-19 00:18:09,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 00:18:09,695 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:09,695 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] [2020-08-19 00:18:09,695 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 00:18:09,695 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:09,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:09,696 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-19 00:18:09,696 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:09,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972645588] [2020-08-19 00:18:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:09,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:09,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:09,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:09,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:10,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 00:18:10,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:10,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 00:18:10,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:10,204 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 00:18:10,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:10,226 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:10,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972645588] [2020-08-19 00:18:10,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:10,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 00:18:10,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940235947] [2020-08-19 00:18:10,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 00:18:10,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:10,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 00:18:10,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:18:10,229 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-19 00:18:11,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:11,028 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-19 00:18:11,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 00:18:11,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-19 00:18:11,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:11,033 INFO L225 Difference]: With dead ends: 346 [2020-08-19 00:18:11,033 INFO L226 Difference]: Without dead ends: 241 [2020-08-19 00:18:11,034 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 [2020-08-19 00:18:11,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-19 00:18:11,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-19 00:18:11,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 00:18:11,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-19 00:18:11,051 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-19 00:18:11,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:11,052 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-19 00:18:11,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 00:18:11,052 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-19 00:18:11,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 00:18:11,054 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:11,055 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] [2020-08-19 00:18:11,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 00:18:11,055 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:11,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-19 00:18:11,055 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:11,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1040031740] [2020-08-19 00:18:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:11,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:11,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:11,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:11,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 00:18:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 00:18:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 00:18:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,484 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:11,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1040031740] [2020-08-19 00:18:11,485 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:11,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 00:18:11,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803633517] [2020-08-19 00:18:11,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 00:18:11,490 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:11,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 00:18:11,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 00:18:11,492 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-19 00:18:11,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:11,807 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-19 00:18:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 00:18:11,807 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-19 00:18:11,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:11,810 INFO L225 Difference]: With dead ends: 431 [2020-08-19 00:18:11,810 INFO L226 Difference]: Without dead ends: 320 [2020-08-19 00:18:11,811 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 [2020-08-19 00:18:11,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-19 00:18:11,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-19 00:18:11,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-19 00:18:11,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-19 00:18:11,827 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-19 00:18:11,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:11,828 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-19 00:18:11,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 00:18:11,828 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-19 00:18:11,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 00:18:11,829 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:11,830 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] [2020-08-19 00:18:11,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 00:18:11,830 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:11,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:11,831 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-19 00:18:11,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:11,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973181112] [2020-08-19 00:18:11,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:11,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:11,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:11,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:12,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 00:18:12,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:12,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 00:18:12,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:12,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 00:18:12,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:12,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973181112] [2020-08-19 00:18:12,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:12,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 00:18:12,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545146448] [2020-08-19 00:18:12,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 00:18:12,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:12,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 00:18:12,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:18:12,407 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-19 00:18:13,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:13,281 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-19 00:18:13,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 00:18:13,282 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-19 00:18:13,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:13,284 INFO L225 Difference]: With dead ends: 358 [2020-08-19 00:18:13,284 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 00:18:13,285 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 [2020-08-19 00:18:13,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 00:18:13,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-19 00:18:13,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-19 00:18:13,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-19 00:18:13,305 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-19 00:18:13,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:13,305 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-19 00:18:13,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 00:18:13,305 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-19 00:18:13,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 00:18:13,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:13,308 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] [2020-08-19 00:18:13,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 00:18:13,309 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:13,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:13,309 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-19 00:18:13,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:13,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097500717] [2020-08-19 00:18:13,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:13,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:13,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:13,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 00:18:13,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 00:18:13,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:13,725 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:13,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097500717] [2020-08-19 00:18:13,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:13,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 00:18:13,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806008381] [2020-08-19 00:18:13,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 00:18:13,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:13,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 00:18:13,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 00:18:13,727 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-19 00:18:13,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:13,995 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-19 00:18:13,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 00:18:13,996 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 00:18:13,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:13,998 INFO L225 Difference]: With dead ends: 448 [2020-08-19 00:18:13,998 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 00:18:14,000 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 [2020-08-19 00:18:14,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 00:18:14,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-19 00:18:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 00:18:14,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-19 00:18:14,018 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-19 00:18:14,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:14,018 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-19 00:18:14,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 00:18:14,018 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-19 00:18:14,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 00:18:14,019 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:14,020 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] [2020-08-19 00:18:14,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 00:18:14,020 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:14,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:14,020 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-19 00:18:14,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:14,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048856458] [2020-08-19 00:18:14,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:14,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 00:18:14,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 00:18:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 00:18:14,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:14,593 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:14,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048856458] [2020-08-19 00:18:14,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:14,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 00:18:14,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034250083] [2020-08-19 00:18:14,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 00:18:14,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:14,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 00:18:14,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-19 00:18:14,595 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-19 00:18:15,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:15,485 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-19 00:18:15,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 00:18:15,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-19 00:18:15,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:15,488 INFO L225 Difference]: With dead ends: 370 [2020-08-19 00:18:15,488 INFO L226 Difference]: Without dead ends: 259 [2020-08-19 00:18:15,489 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 [2020-08-19 00:18:15,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-19 00:18:15,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-19 00:18:15,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-19 00:18:15,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-19 00:18:15,506 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-19 00:18:15,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:15,507 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-19 00:18:15,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 00:18:15,507 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-19 00:18:15,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 00:18:15,508 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:15,508 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] [2020-08-19 00:18:15,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 00:18:15,509 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:15,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:15,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-19 00:18:15,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:15,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477937017] [2020-08-19 00:18:15,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:15,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:15,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:15,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 00:18:15,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 00:18:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-19 00:18:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:15,958 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:15,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477937017] [2020-08-19 00:18:15,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:15,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 00:18:15,959 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748035149] [2020-08-19 00:18:15,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 00:18:15,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:15,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 00:18:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 00:18:15,960 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-19 00:18:16,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:16,320 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-19 00:18:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 00:18:16,320 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-19 00:18:16,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:16,323 INFO L225 Difference]: With dead ends: 465 [2020-08-19 00:18:16,323 INFO L226 Difference]: Without dead ends: 348 [2020-08-19 00:18:16,324 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 00:18:16,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-19 00:18:16,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-19 00:18:16,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-19 00:18:16,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-19 00:18:16,343 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-19 00:18:16,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:16,343 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-19 00:18:16,344 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 00:18:16,344 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-19 00:18:16,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-19 00:18:16,345 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:16,345 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] [2020-08-19 00:18:16,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 00:18:16,345 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:16,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:16,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-19 00:18:16,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:16,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569809799] [2020-08-19 00:18:16,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:16,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:16,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:16,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 00:18:16,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 00:18:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:16,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 00:18:16,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:17,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569809799] [2020-08-19 00:18:17,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:17,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 00:18:17,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212387895] [2020-08-19 00:18:17,015 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 00:18:17,015 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:17,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 00:18:17,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-19 00:18:17,016 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-19 00:18:18,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:18,160 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-19 00:18:18,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 00:18:18,163 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-19 00:18:18,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:18,166 INFO L225 Difference]: With dead ends: 382 [2020-08-19 00:18:18,166 INFO L226 Difference]: Without dead ends: 268 [2020-08-19 00:18:18,167 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 [2020-08-19 00:18:18,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-19 00:18:18,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-19 00:18:18,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 00:18:18,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-19 00:18:18,188 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-19 00:18:18,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:18,188 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-19 00:18:18,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 00:18:18,188 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-19 00:18:18,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 00:18:18,189 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:18,190 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] [2020-08-19 00:18:18,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 00:18:18,190 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:18,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:18,190 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-19 00:18:18,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:18,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1576210836] [2020-08-19 00:18:18,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:18,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:18,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:18,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 00:18:18,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 00:18:18,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 00:18:18,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:18,667 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:18,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1576210836] [2020-08-19 00:18:18,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:18,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 00:18:18,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933990708] [2020-08-19 00:18:18,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 00:18:18,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:18,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 00:18:18,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 00:18:18,669 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-19 00:18:19,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:19,046 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-19 00:18:19,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 00:18:19,047 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-19 00:18:19,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:19,049 INFO L225 Difference]: With dead ends: 482 [2020-08-19 00:18:19,049 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 00:18:19,050 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 [2020-08-19 00:18:19,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 00:18:19,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-19 00:18:19,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-19 00:18:19,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-19 00:18:19,070 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-19 00:18:19,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:19,071 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-19 00:18:19,071 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 00:18:19,071 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-19 00:18:19,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 00:18:19,072 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:19,072 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] [2020-08-19 00:18:19,073 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 00:18:19,073 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:19,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:19,073 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-19 00:18:19,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:19,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1629922946] [2020-08-19 00:18:19,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:19,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:19,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:19,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 00:18:19,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 00:18:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 00:18:19,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:19,739 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:19,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1629922946] [2020-08-19 00:18:19,740 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:19,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 00:18:19,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637310183] [2020-08-19 00:18:19,741 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 00:18:19,741 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:19,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 00:18:19,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:18:19,742 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-19 00:18:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:20,973 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-19 00:18:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 00:18:20,973 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-19 00:18:20,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:20,976 INFO L225 Difference]: With dead ends: 394 [2020-08-19 00:18:20,976 INFO L226 Difference]: Without dead ends: 277 [2020-08-19 00:18:20,977 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 [2020-08-19 00:18:20,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-19 00:18:20,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-19 00:18:20,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-19 00:18:20,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-19 00:18:20,996 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-19 00:18:20,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:20,997 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-19 00:18:20,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 00:18:20,997 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-19 00:18:20,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 00:18:20,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:20,998 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] [2020-08-19 00:18:20,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 00:18:20,999 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:20,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:20,999 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-19 00:18:20,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:20,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553974533] [2020-08-19 00:18:21,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:21,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:21,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:21,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 00:18:21,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 00:18:21,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-19 00:18:21,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:21,502 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553974533] [2020-08-19 00:18:21,502 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:21,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 00:18:21,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748783763] [2020-08-19 00:18:21,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 00:18:21,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:21,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 00:18:21,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 00:18:21,505 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-19 00:18:21,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:21,878 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-19 00:18:21,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 00:18:21,878 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-19 00:18:21,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:21,883 INFO L225 Difference]: With dead ends: 499 [2020-08-19 00:18:21,883 INFO L226 Difference]: Without dead ends: 376 [2020-08-19 00:18:21,885 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 [2020-08-19 00:18:21,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-19 00:18:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-19 00:18:21,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-19 00:18:21,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-19 00:18:21,907 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-19 00:18:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:21,908 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-19 00:18:21,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 00:18:21,908 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-19 00:18:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-19 00:18:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:21,909 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] [2020-08-19 00:18:21,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-19 00:18:21,910 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-19 00:18:21,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:21,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463889631] [2020-08-19 00:18:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:21,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:21,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:21,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:21,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 00:18:22,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-19 00:18:22,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:22,632 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:22,632 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463889631] [2020-08-19 00:18:22,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:22,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 00:18:22,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965423876] [2020-08-19 00:18:22,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 00:18:22,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:22,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 00:18:22,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 00:18:22,634 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-19 00:18:23,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:23,947 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-19 00:18:23,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 00:18:23,948 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-19 00:18:23,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:23,950 INFO L225 Difference]: With dead ends: 406 [2020-08-19 00:18:23,950 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 00:18:23,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-19 00:18:23,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 00:18:23,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-19 00:18:23,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 00:18:23,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-19 00:18:23,971 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-19 00:18:23,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:23,972 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-19 00:18:23,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 00:18:23,972 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-19 00:18:23,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 00:18:23,973 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:23,973 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] [2020-08-19 00:18:23,973 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-19 00:18:23,973 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:23,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:23,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-19 00:18:23,974 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:23,974 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1175079973] [2020-08-19 00:18:23,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:23,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:24,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:24,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 00:18:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 00:18:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 00:18:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:24,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1175079973] [2020-08-19 00:18:24,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:24,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 00:18:24,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854834625] [2020-08-19 00:18:24,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 00:18:24,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:24,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 00:18:24,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 00:18:24,512 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-19 00:18:24,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:24,808 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-19 00:18:24,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 00:18:24,809 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-19 00:18:24,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:24,811 INFO L225 Difference]: With dead ends: 516 [2020-08-19 00:18:24,811 INFO L226 Difference]: Without dead ends: 390 [2020-08-19 00:18:24,812 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 [2020-08-19 00:18:24,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-19 00:18:24,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-19 00:18:24,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-19 00:18:24,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-19 00:18:24,833 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-19 00:18:24,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:24,834 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-19 00:18:24,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 00:18:24,834 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-19 00:18:24,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 00:18:24,835 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:24,835 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] [2020-08-19 00:18:24,835 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-19 00:18:24,836 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:24,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:24,836 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-19 00:18:24,836 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:24,836 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827437062] [2020-08-19 00:18:24,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:24,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:24,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,873 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:24,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:24,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:25,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 00:18:25,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:25,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 00:18:25,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:25,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 00:18:25,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:25,674 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:25,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827437062] [2020-08-19 00:18:25,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:25,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 00:18:25,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871252366] [2020-08-19 00:18:25,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 00:18:25,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:25,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 00:18:25,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-19 00:18:25,676 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-19 00:18:27,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:27,149 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-19 00:18:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 00:18:27,154 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-19 00:18:27,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:27,156 INFO L225 Difference]: With dead ends: 418 [2020-08-19 00:18:27,156 INFO L226 Difference]: Without dead ends: 295 [2020-08-19 00:18:27,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-19 00:18:27,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-19 00:18:27,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-19 00:18:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-19 00:18:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-19 00:18:27,177 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-19 00:18:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:27,178 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-19 00:18:27,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 00:18:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-19 00:18:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 00:18:27,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:27,179 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] [2020-08-19 00:18:27,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-19 00:18:27,180 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:27,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:27,180 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-19 00:18:27,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:27,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321795546] [2020-08-19 00:18:27,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:27,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 00:18:27,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 00:18:27,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-19 00:18:27,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:27,767 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 00:18:27,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321795546] [2020-08-19 00:18:27,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:27,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 00:18:27,768 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302577261] [2020-08-19 00:18:27,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 00:18:27,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:27,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 00:18:27,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 00:18:27,769 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-19 00:18:28,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:28,215 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-19 00:18:28,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 00:18:28,220 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-19 00:18:28,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:28,223 INFO L225 Difference]: With dead ends: 533 [2020-08-19 00:18:28,223 INFO L226 Difference]: Without dead ends: 404 [2020-08-19 00:18:28,224 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 [2020-08-19 00:18:28,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-19 00:18:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-19 00:18:28,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-19 00:18:28,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-19 00:18:28,246 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-19 00:18:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:28,246 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-19 00:18:28,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 00:18:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-19 00:18:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 00:18:28,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:28,248 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] [2020-08-19 00:18:28,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-19 00:18:28,248 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-19 00:18:28,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:28,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186350594] [2020-08-19 00:18:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:28,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:28,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:28,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:28,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:28,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 00:18:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,448 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 00:18:28,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186350594] [2020-08-19 00:18:28,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:28,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 00:18:28,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044809121] [2020-08-19 00:18:28,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:18:28,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:28,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:18:28,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:18:28,450 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-19 00:18:28,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:28,694 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-19 00:18:28,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:28,694 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 00:18:28,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:28,697 INFO L225 Difference]: With dead ends: 271 [2020-08-19 00:18:28,697 INFO L226 Difference]: Without dead ends: 261 [2020-08-19 00:18:28,698 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 [2020-08-19 00:18:28,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-19 00:18:28,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-19 00:18:28,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-19 00:18:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-19 00:18:28,727 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-19 00:18:28,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:28,727 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-19 00:18:28,727 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:18:28,728 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-19 00:18:28,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 00:18:28,729 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:28,729 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] [2020-08-19 00:18:28,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-19 00:18:28,730 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:28,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-19 00:18:28,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:28,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577216901] [2020-08-19 00:18:28,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:28,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:28,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:28,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 00:18:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 00:18:29,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577216901] [2020-08-19 00:18:29,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:29,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:18:29,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351558702] [2020-08-19 00:18:29,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:18:29,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:29,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:18:29,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:18:29,026 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-19 00:18:29,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:29,261 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-19 00:18:29,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:29,262 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 00:18:29,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:29,267 INFO L225 Difference]: With dead ends: 285 [2020-08-19 00:18:29,267 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 00:18:29,268 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 [2020-08-19 00:18:29,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 00:18:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-19 00:18:29,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 00:18:29,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-19 00:18:29,311 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-19 00:18:29,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:29,312 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-19 00:18:29,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:18:29,312 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-19 00:18:29,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 00:18:29,314 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:29,314 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] [2020-08-19 00:18:29,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-19 00:18:29,314 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:29,315 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-19 00:18:29,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:29,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013525525] [2020-08-19 00:18:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:29,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:29,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:29,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:29,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,441 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:29,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 00:18:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,452 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-19 00:18:29,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013525525] [2020-08-19 00:18:29,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:29,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 00:18:29,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827296457] [2020-08-19 00:18:29,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 00:18:29,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:29,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 00:18:29,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 00:18:29,454 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-19 00:18:29,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:29,508 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-19 00:18:29,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 00:18:29,509 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-19 00:18:29,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:29,512 INFO L225 Difference]: With dead ends: 271 [2020-08-19 00:18:29,512 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 00:18:29,512 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 [2020-08-19 00:18:29,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 00:18:29,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-19 00:18:29,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 00:18:29,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-19 00:18:29,547 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-19 00:18:29,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:29,547 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-19 00:18:29,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 00:18:29,548 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-19 00:18:29,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 00:18:29,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:29,550 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] [2020-08-19 00:18:29,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-19 00:18:29,550 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:29,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:29,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-19 00:18:29,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:29,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [938296901] [2020-08-19 00:18:29,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:29,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:29,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:29,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 00:18:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 00:18:29,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [938296901] [2020-08-19 00:18:29,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:29,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 00:18:29,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89524122] [2020-08-19 00:18:29,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 00:18:29,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 00:18:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 00:18:29,899 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-19 00:18:30,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:30,151 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-19 00:18:30,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:30,151 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-19 00:18:30,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:30,153 INFO L225 Difference]: With dead ends: 284 [2020-08-19 00:18:30,154 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 00:18:30,154 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 [2020-08-19 00:18:30,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 00:18:30,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-19 00:18:30,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-19 00:18:30,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-19 00:18:30,186 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-19 00:18:30,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:30,186 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-19 00:18:30,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 00:18:30,186 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-19 00:18:30,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 00:18:30,188 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:30,188 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] [2020-08-19 00:18:30,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-19 00:18:30,189 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:30,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:30,189 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-19 00:18:30,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:30,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030819257] [2020-08-19 00:18:30,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:30,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:30,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:30,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:30,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:30,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 00:18:30,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,370 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 00:18:30,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030819257] [2020-08-19 00:18:30,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:30,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 00:18:30,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676201146] [2020-08-19 00:18:30,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 00:18:30,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:30,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 00:18:30,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 00:18:30,373 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-19 00:18:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:30,479 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-19 00:18:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:18:30,480 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-19 00:18:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:30,483 INFO L225 Difference]: With dead ends: 303 [2020-08-19 00:18:30,483 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 00:18:30,484 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 [2020-08-19 00:18:30,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 00:18:30,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-19 00:18:30,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-19 00:18:30,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-19 00:18:30,521 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-19 00:18:30,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:30,522 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-19 00:18:30,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 00:18:30,522 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-19 00:18:30,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 00:18:30,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:30,524 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] [2020-08-19 00:18:30,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-19 00:18:30,525 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:30,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:30,525 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-19 00:18:30,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:30,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1808880073] [2020-08-19 00:18:30,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:30,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 00:18:30,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 00:18:30,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,656 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:30,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 00:18:30,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,668 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 00:18:30,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1808880073] [2020-08-19 00:18:30,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:30,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 00:18:30,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131847116] [2020-08-19 00:18:30,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 00:18:30,670 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:30,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 00:18:30,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 00:18:30,670 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-19 00:18:30,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:30,765 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-19 00:18:30,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 00:18:30,766 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-19 00:18:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:30,767 INFO L225 Difference]: With dead ends: 409 [2020-08-19 00:18:30,768 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 00:18:30,769 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 [2020-08-19 00:18:30,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 00:18:30,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-19 00:18:30,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 00:18:30,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 00:18:30,786 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-19 00:18:30,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:30,786 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 00:18:30,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 00:18:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 00:18:30,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 00:18:30,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:30,787 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] [2020-08-19 00:18:30,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-19 00:18:30,788 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:30,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:30,788 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-19 00:18:30,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:30,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926385934] [2020-08-19 00:18:30,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:30,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:30,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:30,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:30,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 00:18:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:30,953 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-19 00:18:30,953 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926385934] [2020-08-19 00:18:30,953 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:30,953 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 00:18:30,954 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604309016] [2020-08-19 00:18:30,954 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 00:18:30,954 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:30,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 00:18:30,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 00:18:30,955 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-19 00:18:31,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:31,080 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-19 00:18:31,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 00:18:31,080 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 00:18:31,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:31,082 INFO L225 Difference]: With dead ends: 173 [2020-08-19 00:18:31,082 INFO L226 Difference]: Without dead ends: 163 [2020-08-19 00:18:31,082 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:18:31,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-19 00:18:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-19 00:18:31,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 00:18:31,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-19 00:18:31,103 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-19 00:18:31,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:31,103 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-19 00:18:31,103 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 00:18:31,103 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-19 00:18:31,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 00:18:31,104 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:31,105 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] [2020-08-19 00:18:31,105 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-19 00:18:31,105 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:31,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:31,105 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-19 00:18:31,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:31,106 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708253094] [2020-08-19 00:18:31,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:31,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:31,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:31,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:31,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:31,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 00:18:31,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 00:18:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,413 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-19 00:18:31,413 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708253094] [2020-08-19 00:18:31,413 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:31,413 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:18:31,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795538962] [2020-08-19 00:18:31,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:18:31,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:18:31,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:18:31,416 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-19 00:18:31,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:31,714 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-19 00:18:31,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 00:18:31,716 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-19 00:18:31,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:31,717 INFO L225 Difference]: With dead ends: 175 [2020-08-19 00:18:31,717 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 00:18:31,718 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 [2020-08-19 00:18:31,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 00:18:31,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-19 00:18:31,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 00:18:31,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-19 00:18:31,734 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-19 00:18:31,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:31,735 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-19 00:18:31,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:18:31,735 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-19 00:18:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 00:18:31,738 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:31,739 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] [2020-08-19 00:18:31,739 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-19 00:18:31,739 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:31,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:31,740 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-19 00:18:31,740 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:31,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545789168] [2020-08-19 00:18:31,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:31,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:31,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:31,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:31,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:31,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:18:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-19 00:18:32,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545789168] [2020-08-19 00:18:32,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 00:18:32,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 00:18:32,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624036052] [2020-08-19 00:18:32,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:18:32,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:32,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:18:32,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:18:32,035 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-19 00:18:32,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:32,268 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-19 00:18:32,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:32,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 00:18:32,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:32,271 INFO L225 Difference]: With dead ends: 184 [2020-08-19 00:18:32,271 INFO L226 Difference]: Without dead ends: 174 [2020-08-19 00:18:32,271 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 [2020-08-19 00:18:32,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-19 00:18:32,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-19 00:18:32,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 00:18:32,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-19 00:18:32,295 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-19 00:18:32,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:32,295 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-19 00:18:32,295 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:18:32,296 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-19 00:18:32,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 00:18:32,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:32,297 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] [2020-08-19 00:18:32,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-19 00:18:32,298 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:32,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:32,298 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-19 00:18:32,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:32,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683656727] [2020-08-19 00:18:32,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:32,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:32,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:32,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:32,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:18:32,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,607 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 00:18:32,607 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683656727] [2020-08-19 00:18:32,607 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:32,608 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 00:18:32,608 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179784494] [2020-08-19 00:18:32,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 00:18:32,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:32,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 00:18:32,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 00:18:32,609 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-19 00:18:32,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:32,829 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-19 00:18:32,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:32,830 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 00:18:32,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:32,832 INFO L225 Difference]: With dead ends: 194 [2020-08-19 00:18:32,832 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 00:18:32,833 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 [2020-08-19 00:18:32,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 00:18:32,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-19 00:18:32,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 00:18:32,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-19 00:18:32,852 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-19 00:18:32,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:32,852 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-19 00:18:32,852 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 00:18:32,853 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-19 00:18:32,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 00:18:32,854 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:32,854 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] [2020-08-19 00:18:32,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-19 00:18:32,854 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:32,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:32,855 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-19 00:18:32,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:32,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424216972] [2020-08-19 00:18:32,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:32,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:32,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:18:33,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,102 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 00:18:33,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424216972] [2020-08-19 00:18:33,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:33,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:18:33,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394616256] [2020-08-19 00:18:33,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:18:33,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:33,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:18:33,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:18:33,104 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-19 00:18:33,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:33,289 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-19 00:18:33,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:33,290 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 00:18:33,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:33,291 INFO L225 Difference]: With dead ends: 160 [2020-08-19 00:18:33,292 INFO L226 Difference]: Without dead ends: 140 [2020-08-19 00:18:33,292 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 [2020-08-19 00:18:33,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-19 00:18:33,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-19 00:18:33,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 00:18:33,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-19 00:18:33,312 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-19 00:18:33,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:33,312 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-19 00:18:33,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:18:33,312 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-19 00:18:33,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 00:18:33,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:33,314 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] [2020-08-19 00:18:33,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-19 00:18:33,314 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:33,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:33,314 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-19 00:18:33,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:33,315 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243501468] [2020-08-19 00:18:33,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:33,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:33,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:33,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:33,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:33,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:33,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:18:33,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:33,712 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 00:18:33,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243501468] [2020-08-19 00:18:33,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:33,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 00:18:33,713 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25159641] [2020-08-19 00:18:33,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 00:18:33,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:33,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 00:18:33,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 00:18:33,714 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-19 00:18:33,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:33,978 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-19 00:18:33,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 00:18:33,981 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-19 00:18:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:33,982 INFO L225 Difference]: With dead ends: 155 [2020-08-19 00:18:33,982 INFO L226 Difference]: Without dead ends: 137 [2020-08-19 00:18:33,982 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 [2020-08-19 00:18:33,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-19 00:18:33,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-19 00:18:33,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 00:18:33,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-19 00:18:33,994 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-19 00:18:33,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:33,994 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-19 00:18:33,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 00:18:33,994 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-19 00:18:33,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 00:18:33,995 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 00:18:33,995 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] [2020-08-19 00:18:33,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-19 00:18:33,996 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 00:18:33,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 00:18:33,996 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-19 00:18:33,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 00:18:33,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [897050399] [2020-08-19 00:18:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 00:18:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 00:18:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 00:18:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 00:18:34,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 00:18:34,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 00:18:34,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 00:18:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 00:18:34,267 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-19 00:18:34,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [897050399] [2020-08-19 00:18:34,268 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 00:18:34,268 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 00:18:34,268 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360003992] [2020-08-19 00:18:34,269 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 00:18:34,269 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 00:18:34,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 00:18:34,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 00:18:34,270 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-19 00:18:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 00:18:34,434 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-19 00:18:34,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 00:18:34,434 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 00:18:34,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 00:18:34,435 INFO L225 Difference]: With dead ends: 137 [2020-08-19 00:18:34,435 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 00:18:34,436 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 [2020-08-19 00:18:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 00:18:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 00:18:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 00:18:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 00:18:34,436 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-19 00:18:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 00:18:34,437 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 00:18:34,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 00:18:34,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 00:18:34,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 00:18:34,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-19 00:18:34,440 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 00:18:35,197 WARN L193 SmtUtils]: Spent 736.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136