/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.8 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 01:22:40,107 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 01:22:40,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 01:22:40,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 01:22:40,134 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 01:22:40,135 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 01:22:40,137 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 01:22:40,139 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 01:22:40,140 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 01:22:40,141 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 01:22:40,142 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 01:22:40,143 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 01:22:40,144 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 01:22:40,145 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 01:22:40,146 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 01:22:40,147 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 01:22:40,148 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 01:22:40,149 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 01:22:40,151 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 01:22:40,153 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 01:22:40,155 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 01:22:40,156 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 01:22:40,157 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 01:22:40,158 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 01:22:40,161 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 01:22:40,169 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 01:22:40,170 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 01:22:40,171 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 01:22:40,172 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 01:22:40,200 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 01:22:40,200 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 01:22:40,202 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 01:22:40,202 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 01:22:40,202 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 01:22:40,202 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 01:22:40,203 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 01:22:40,203 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 01:22:40,203 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 01:22:40,203 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 01:22:40,203 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 01:22:40,204 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 01:22:40,204 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 01:22:40,204 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 01:22:40,204 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 01:22:40,204 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 01:22:40,205 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 01:22:40,205 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 01:22:40,205 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 01:22:40,205 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 01:22:40,206 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 01:22:40,206 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:40,206 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 01:22:40,206 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 01:22:40,206 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 01:22:40,207 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 01:22:40,207 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 01:22:40,207 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 01:22:40,207 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 01:22:40,207 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.8;log-additional-information=true; [2020-08-22 01:22:40,507 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 01:22:40,519 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 01:22:40,523 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 01:22:40,524 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 01:22:40,525 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 01:22:40,526 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 01:22:40,601 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9006092ae/c945cedb525444e0b2586d8c1b6baa71/FLAGc550df82f [2020-08-22 01:22:41,073 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 01:22:41,074 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-22 01:22:41,081 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9006092ae/c945cedb525444e0b2586d8c1b6baa71/FLAGc550df82f [2020-08-22 01:22:41,411 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9006092ae/c945cedb525444e0b2586d8c1b6baa71 [2020-08-22 01:22:41,421 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 01:22:41,424 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 01:22:41,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:41,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 01:22:41,431 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 01:22:41,432 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:41" (1/1) ... [2020-08-22 01:22:41,436 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@43889371 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:41, skipping insertion in model container [2020-08-22 01:22:41,436 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 01:22:41" (1/1) ... [2020-08-22 01:22:41,445 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 01:22:41,491 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 01:22:41,833 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:41,841 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 01:22:41,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 01:22:42,018 INFO L208 MainTranslator]: Completed translation [2020-08-22 01:22:42,020 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42 WrapperNode [2020-08-22 01:22:42,020 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 01:22:42,022 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 01:22:42,022 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 01:22:42,022 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 01:22:42,033 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,033 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,041 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,042 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,063 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,070 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,073 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... [2020-08-22 01:22:42,076 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 01:22:42,077 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 01:22:42,077 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 01:22:42,077 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 01:22:42,079 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 01:22:42,144 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-22 01:22:42,145 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 01:22:42,145 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-22 01:22:42,146 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-22 01:22:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 01:22:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 01:22:42,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 01:22:42,574 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 01:22:42,575 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-22 01:22:42,579 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:42 BoogieIcfgContainer [2020-08-22 01:22:42,579 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 01:22:42,581 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 01:22:42,581 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 01:22:42,584 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 01:22:42,584 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 01:22:41" (1/3) ... [2020-08-22 01:22:42,585 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6ff834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:42, skipping insertion in model container [2020-08-22 01:22:42,585 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 01:22:42" (2/3) ... [2020-08-22 01:22:42,586 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c6ff834 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 01:22:42, skipping insertion in model container [2020-08-22 01:22:42,586 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 01:22:42" (3/3) ... [2020-08-22 01:22:42,587 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-22 01:22:42,596 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 01:22:42,603 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 01:22:42,615 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 01:22:42,639 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 01:22:42,639 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 01:22:42,639 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 01:22:42,639 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 01:22:42,640 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 01:22:42,640 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 01:22:42,640 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 01:22:42,640 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 01:22:42,662 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-22 01:22:42,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 01:22:42,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:42,671 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:42,672 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-22 01:22:42,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:42,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640615370] [2020-08-22 01:22:42,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:42,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:42,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,983 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-22 01:22:42,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:42,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-22 01:22:42,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,070 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:43,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640615370] [2020-08-22 01:22:43,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:43,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 01:22:43,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570697846] [2020-08-22 01:22:43,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:43,089 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:43,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:43,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:43,108 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-22 01:22:43,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:43,341 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-22 01:22:43,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:22:43,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-22 01:22:43,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:43,368 INFO L225 Difference]: With dead ends: 136 [2020-08-22 01:22:43,368 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 01:22:43,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:43,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 01:22:43,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-22 01:22:43,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-22 01:22:43,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-22 01:22:43,434 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-22 01:22:43,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:43,435 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-22 01:22:43,435 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:43,435 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-22 01:22:43,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 01:22:43,438 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:43,439 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:43,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 01:22:43,439 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:43,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:43,440 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-22 01:22:43,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:43,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258915095] [2020-08-22 01:22:43,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:43,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:43,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:43,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-22 01:22:43,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 01:22:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:43,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,574 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:43,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258915095] [2020-08-22 01:22:43,575 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:43,575 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-22 01:22:43,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913746026] [2020-08-22 01:22:43,577 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:43,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:43,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:43,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:43,578 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-22 01:22:43,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:43,669 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-22 01:22:43,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:22:43,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-22 01:22:43,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:43,673 INFO L225 Difference]: With dead ends: 129 [2020-08-22 01:22:43,673 INFO L226 Difference]: Without dead ends: 79 [2020-08-22 01:22:43,675 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:43,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-22 01:22:43,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-22 01:22:43,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-22 01:22:43,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-22 01:22:43,721 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-22 01:22:43,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:43,721 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-22 01:22:43,721 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:43,723 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-22 01:22:43,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 01:22:43,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:43,726 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:43,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 01:22:43,726 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:43,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:43,727 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-22 01:22:43,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:43,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698904102] [2020-08-22 01:22:43,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:43,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:43,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-22 01:22:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:22:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:22:43,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:43,867 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:43,868 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698904102] [2020-08-22 01:22:43,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:43,868 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:22:43,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509739540] [2020-08-22 01:22:43,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:43,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:43,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:43,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:43,870 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-22 01:22:44,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,042 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-22 01:22:44,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:44,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-22 01:22:44,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,047 INFO L225 Difference]: With dead ends: 145 [2020-08-22 01:22:44,047 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 01:22:44,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 01:22:44,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-22 01:22:44,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-22 01:22:44,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-22 01:22:44,074 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-22 01:22:44,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,075 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-22 01:22:44,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:44,075 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-22 01:22:44,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 01:22:44,081 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,081 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:44,082 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 01:22:44,082 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,085 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-22 01:22:44,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492910739] [2020-08-22 01:22:44,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 01:22:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-22 01:22:44,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,254 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492910739] [2020-08-22 01:22:44,255 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:22:44,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476360126] [2020-08-22 01:22:44,256 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:22:44,256 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:22:44,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:44,257 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-22 01:22:44,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,352 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-22 01:22:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:22:44,353 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-22 01:22:44,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,357 INFO L225 Difference]: With dead ends: 156 [2020-08-22 01:22:44,357 INFO L226 Difference]: Without dead ends: 93 [2020-08-22 01:22:44,358 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-22 01:22:44,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-22 01:22:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 01:22:44,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-22 01:22:44,378 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-22 01:22:44,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,378 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-22 01:22:44,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:22:44,379 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-22 01:22:44,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 01:22:44,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,381 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:44,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 01:22:44,382 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,382 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-22 01:22:44,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679740896] [2020-08-22 01:22:44,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 01:22:44,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:44,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:22:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,561 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679740896] [2020-08-22 01:22:44,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:22:44,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595789066] [2020-08-22 01:22:44,566 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:44,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:44,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,567 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-22 01:22:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,696 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-22 01:22:44,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:22:44,697 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-22 01:22:44,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:44,700 INFO L225 Difference]: With dead ends: 166 [2020-08-22 01:22:44,701 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 01:22:44,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:44,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 01:22:44,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-22 01:22:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-22 01:22:44,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-22 01:22:44,731 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-22 01:22:44,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:44,731 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-22 01:22:44,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:44,731 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-22 01:22:44,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 01:22:44,735 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:44,736 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:44,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 01:22:44,736 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:44,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:44,737 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-22 01:22:44,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:44,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [405041483] [2020-08-22 01:22:44,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:44,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:44,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:44,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-22 01:22:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 01:22:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:44,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:44,896 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:44,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [405041483] [2020-08-22 01:22:44,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:44,897 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 01:22:44,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184371058] [2020-08-22 01:22:44,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:22:44,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:44,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:22:44,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:22:44,899 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-22 01:22:44,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:44,999 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 01:22:44,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:22:44,999 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-22 01:22:45,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,001 INFO L225 Difference]: With dead ends: 176 [2020-08-22 01:22:45,001 INFO L226 Difference]: Without dead ends: 110 [2020-08-22 01:22:45,002 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-22 01:22:45,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-22 01:22:45,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 01:22:45,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-22 01:22:45,016 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-22 01:22:45,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,016 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-22 01:22:45,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:22:45,016 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-22 01:22:45,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 01:22:45,018 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,018 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,018 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 01:22:45,018 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,019 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-22 01:22:45,019 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,019 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420562017] [2020-08-22 01:22:45,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-22 01:22:45,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:22:45,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420562017] [2020-08-22 01:22:45,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:22:45,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938114268] [2020-08-22 01:22:45,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:22:45,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:22:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,160 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-22 01:22:45,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,303 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-22 01:22:45,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:22:45,304 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-22 01:22:45,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,306 INFO L225 Difference]: With dead ends: 178 [2020-08-22 01:22:45,306 INFO L226 Difference]: Without dead ends: 115 [2020-08-22 01:22:45,307 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-22 01:22:45,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-22 01:22:45,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-22 01:22:45,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-22 01:22:45,318 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-22 01:22:45,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,319 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-22 01:22:45,319 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:22:45,319 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-22 01:22:45,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 01:22:45,320 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,321 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 01:22:45,321 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-22 01:22:45,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,322 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600147640] [2020-08-22 01:22:45,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 01:22:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-22 01:22:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:45,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,417 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600147640] [2020-08-22 01:22:45,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 01:22:45,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518513343] [2020-08-22 01:22:45,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 01:22:45,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 01:22:45,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-22 01:22:45,419 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-22 01:22:45,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,508 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-22 01:22:45,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:22:45,509 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-22 01:22:45,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,511 INFO L225 Difference]: With dead ends: 193 [2020-08-22 01:22:45,511 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 01:22:45,512 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 01:22:45,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-22 01:22:45,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 01:22:45,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-22 01:22:45,522 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-22 01:22:45,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,523 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-22 01:22:45,523 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 01:22:45,523 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-22 01:22:45,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 01:22:45,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,524 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 01:22:45,524 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,525 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-22 01:22:45,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [989701516] [2020-08-22 01:22:45,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,553 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 01:22:45,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,675 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:45,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,678 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 01:22:45,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,688 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:45,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [989701516] [2020-08-22 01:22:45,689 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:45,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:22:45,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641882435] [2020-08-22 01:22:45,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:22:45,690 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:45,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:22:45,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:45,691 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-22 01:22:45,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:45,883 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-22 01:22:45,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:22:45,884 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-22 01:22:45,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:45,886 INFO L225 Difference]: With dead ends: 190 [2020-08-22 01:22:45,886 INFO L226 Difference]: Without dead ends: 124 [2020-08-22 01:22:45,887 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:45,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-22 01:22:45,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-22 01:22:45,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-22 01:22:45,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-22 01:22:45,897 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-22 01:22:45,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:45,898 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-22 01:22:45,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:22:45,898 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-22 01:22:45,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 01:22:45,899 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:45,899 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:45,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 01:22:45,900 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:45,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:45,900 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-22 01:22:45,900 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:45,901 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687777830] [2020-08-22 01:22:45,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:45,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:45,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:45,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:45,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-22 01:22:46,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 01:22:46,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:46,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,062 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,063 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687777830] [2020-08-22 01:22:46,063 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:22:46,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532416426] [2020-08-22 01:22:46,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:22:46,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:22:46,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:22:46,065 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-22 01:22:46,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,202 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-22 01:22:46,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:22:46,204 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-22 01:22:46,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,208 INFO L225 Difference]: With dead ends: 210 [2020-08-22 01:22:46,208 INFO L226 Difference]: Without dead ends: 138 [2020-08-22 01:22:46,209 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-22 01:22:46,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-22 01:22:46,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 01:22:46,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-22 01:22:46,227 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-22 01:22:46,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,228 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-22 01:22:46,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:22:46,228 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-22 01:22:46,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 01:22:46,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,229 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 01:22:46,230 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,230 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-22 01:22:46,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [601173416] [2020-08-22 01:22:46,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-22 01:22:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:22:46,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [601173416] [2020-08-22 01:22:46,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:22:46,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782760688] [2020-08-22 01:22:46,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:22:46,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:22:46,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,440 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-22 01:22:46,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,597 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-22 01:22:46,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:22:46,600 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-22 01:22:46,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,601 INFO L225 Difference]: With dead ends: 202 [2020-08-22 01:22:46,601 INFO L226 Difference]: Without dead ends: 133 [2020-08-22 01:22:46,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:46,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-22 01:22:46,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-22 01:22:46,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-22 01:22:46,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-22 01:22:46,633 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-22 01:22:46,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,633 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-22 01:22:46,633 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:22:46,633 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-22 01:22:46,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 01:22:46,637 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,638 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 01:22:46,638 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-22 01:22:46,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1538698698] [2020-08-22 01:22:46,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 01:22:46,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-22 01:22:46,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:46,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:46,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1538698698] [2020-08-22 01:22:46,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:46,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:22:46,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877667357] [2020-08-22 01:22:46,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:22:46,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:46,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:22:46,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:22:46,768 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-22 01:22:46,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:46,889 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-22 01:22:46,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:22:46,890 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-22 01:22:46,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:46,892 INFO L225 Difference]: With dead ends: 227 [2020-08-22 01:22:46,892 INFO L226 Difference]: Without dead ends: 152 [2020-08-22 01:22:46,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:46,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-22 01:22:46,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-22 01:22:46,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 01:22:46,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-22 01:22:46,904 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-22 01:22:46,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:46,904 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-22 01:22:46,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:22:46,905 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-22 01:22:46,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 01:22:46,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:46,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:46,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 01:22:46,907 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:46,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:46,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-22 01:22:46,908 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:46,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559811265] [2020-08-22 01:22:46,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:46,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:46,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:46,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:46,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 01:22:47,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:22:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,116 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:47,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559811265] [2020-08-22 01:22:47,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:47,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:22:47,117 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623215351] [2020-08-22 01:22:47,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:22:47,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:47,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:22:47,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:47,120 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-22 01:22:47,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:47,346 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-22 01:22:47,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:22:47,347 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-22 01:22:47,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:47,349 INFO L225 Difference]: With dead ends: 214 [2020-08-22 01:22:47,349 INFO L226 Difference]: Without dead ends: 142 [2020-08-22 01:22:47,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:47,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-22 01:22:47,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-22 01:22:47,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-22 01:22:47,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-22 01:22:47,362 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-22 01:22:47,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:47,364 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-22 01:22:47,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:22:47,364 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-22 01:22:47,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 01:22:47,365 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:47,365 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:47,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 01:22:47,366 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:47,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:47,366 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-22 01:22:47,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:47,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485757734] [2020-08-22 01:22:47,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:47,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:47,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:47,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-22 01:22:47,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 01:22:47,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:47,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,519 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:47,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485757734] [2020-08-22 01:22:47,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:47,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:22:47,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281501376] [2020-08-22 01:22:47,521 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:22:47,521 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:47,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:22:47,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:22:47,522 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-22 01:22:47,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:47,684 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-22 01:22:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:22:47,685 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-22 01:22:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:47,686 INFO L225 Difference]: With dead ends: 244 [2020-08-22 01:22:47,687 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 01:22:47,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:47,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 01:22:47,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-22 01:22:47,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 01:22:47,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-22 01:22:47,701 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-22 01:22:47,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:47,701 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-22 01:22:47,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:22:47,702 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-22 01:22:47,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 01:22:47,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:47,703 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:47,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 01:22:47,703 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-22 01:22:47,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:47,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839782089] [2020-08-22 01:22:47,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:47,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:47,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:47,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-22 01:22:47,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:22:47,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:47,905 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:47,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839782089] [2020-08-22 01:22:47,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:47,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:22:47,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198890651] [2020-08-22 01:22:47,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:22:47,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:47,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:22:47,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:47,908 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-22 01:22:48,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:48,154 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-22 01:22:48,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:48,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-22 01:22:48,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:48,157 INFO L225 Difference]: With dead ends: 226 [2020-08-22 01:22:48,157 INFO L226 Difference]: Without dead ends: 151 [2020-08-22 01:22:48,158 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-22 01:22:48,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-22 01:22:48,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 01:22:48,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-22 01:22:48,176 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-22 01:22:48,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:48,176 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-22 01:22:48,176 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:22:48,176 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-22 01:22:48,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 01:22:48,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:48,178 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:48,178 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 01:22:48,179 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:48,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:48,179 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-22 01:22:48,179 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:48,180 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200086998] [2020-08-22 01:22:48,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:48,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,222 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:48,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:48,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 01:22:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-22 01:22:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:48,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200086998] [2020-08-22 01:22:48,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:48,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 01:22:48,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977817803] [2020-08-22 01:22:48,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 01:22:48,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:48,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 01:22:48,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-22 01:22:48,345 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-22 01:22:48,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:48,480 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-22 01:22:48,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 01:22:48,480 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-22 01:22:48,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:48,482 INFO L225 Difference]: With dead ends: 261 [2020-08-22 01:22:48,482 INFO L226 Difference]: Without dead ends: 180 [2020-08-22 01:22:48,483 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-22 01:22:48,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-22 01:22:48,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-22 01:22:48,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-22 01:22:48,517 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-22 01:22:48,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:48,517 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-22 01:22:48,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 01:22:48,517 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-22 01:22:48,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 01:22:48,518 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:48,519 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:48,519 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 01:22:48,519 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:48,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:48,520 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-22 01:22:48,520 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:48,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352177680] [2020-08-22 01:22:48,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:48,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:48,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:48,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 01:22:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:48,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:48,738 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352177680] [2020-08-22 01:22:48,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:48,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:22:48,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820848365] [2020-08-22 01:22:48,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:22:48,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:48,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:22:48,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:48,741 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-22 01:22:48,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:48,982 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-22 01:22:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:22:48,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-22 01:22:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:48,985 INFO L225 Difference]: With dead ends: 238 [2020-08-22 01:22:48,985 INFO L226 Difference]: Without dead ends: 160 [2020-08-22 01:22:48,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:48,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-22 01:22:48,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-22 01:22:48,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-22 01:22:48,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-22 01:22:48,996 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-22 01:22:48,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:48,997 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-22 01:22:48,997 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:22:48,997 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-22 01:22:48,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 01:22:48,998 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:48,998 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:48,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 01:22:48,998 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:48,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:48,999 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-22 01:22:48,999 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:48,999 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2010526940] [2020-08-22 01:22:48,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:49,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,018 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:49,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-22 01:22:49,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 01:22:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:49,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:49,168 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2010526940] [2020-08-22 01:22:49,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:49,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:22:49,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644203280] [2020-08-22 01:22:49,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:22:49,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:49,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:22:49,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:22:49,170 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-22 01:22:49,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:49,322 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-22 01:22:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 01:22:49,323 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-22 01:22:49,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:49,325 INFO L225 Difference]: With dead ends: 278 [2020-08-22 01:22:49,325 INFO L226 Difference]: Without dead ends: 194 [2020-08-22 01:22:49,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:49,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-22 01:22:49,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-22 01:22:49,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-22 01:22:49,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-22 01:22:49,341 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-22 01:22:49,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:49,341 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-22 01:22:49,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:22:49,342 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-22 01:22:49,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 01:22:49,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:49,344 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:49,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 01:22:49,344 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:49,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:49,345 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-22 01:22:49,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:49,345 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683523174] [2020-08-22 01:22:49,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:49,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:49,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-22 01:22:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:22:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:49,664 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:49,665 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683523174] [2020-08-22 01:22:49,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:49,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:22:49,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763132338] [2020-08-22 01:22:49,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:22:49,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:49,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:22:49,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:49,668 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-22 01:22:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:49,960 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-22 01:22:49,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:49,961 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-22 01:22:49,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:49,962 INFO L225 Difference]: With dead ends: 250 [2020-08-22 01:22:49,962 INFO L226 Difference]: Without dead ends: 169 [2020-08-22 01:22:49,963 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:49,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-22 01:22:49,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-22 01:22:49,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-22 01:22:49,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-22 01:22:49,977 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-22 01:22:49,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:49,977 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-22 01:22:49,977 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:22:49,978 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-22 01:22:49,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 01:22:49,979 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:49,979 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:49,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 01:22:49,979 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:49,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:49,980 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-22 01:22:49,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:49,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1613957266] [2020-08-22 01:22:49,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:49,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:50,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,008 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:50,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:50,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 01:22:50,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-22 01:22:50,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:50,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,165 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:50,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1613957266] [2020-08-22 01:22:50,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:50,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 01:22:50,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253502741] [2020-08-22 01:22:50,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 01:22:50,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:50,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 01:22:50,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:22:50,168 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-22 01:22:50,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:50,367 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-22 01:22:50,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 01:22:50,368 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-22 01:22:50,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:50,370 INFO L225 Difference]: With dead ends: 295 [2020-08-22 01:22:50,371 INFO L226 Difference]: Without dead ends: 208 [2020-08-22 01:22:50,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:50,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-22 01:22:50,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-22 01:22:50,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 01:22:50,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-22 01:22:50,387 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-22 01:22:50,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:50,388 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-22 01:22:50,388 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 01:22:50,388 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-22 01:22:50,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 01:22:50,390 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:50,390 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:50,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 01:22:50,391 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:50,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:50,391 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-22 01:22:50,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:50,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [910477499] [2020-08-22 01:22:50,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:50,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:50,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:50,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:50,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 01:22:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:50,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 01:22:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:50,801 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:50,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [910477499] [2020-08-22 01:22:50,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:50,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:22:50,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907295675] [2020-08-22 01:22:50,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:22:50,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:50,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:22:50,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:50,803 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-22 01:22:51,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:51,207 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-22 01:22:51,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:22:51,208 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-22 01:22:51,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:51,210 INFO L225 Difference]: With dead ends: 262 [2020-08-22 01:22:51,210 INFO L226 Difference]: Without dead ends: 178 [2020-08-22 01:22:51,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:51,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-22 01:22:51,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-22 01:22:51,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-22 01:22:51,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-22 01:22:51,227 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-22 01:22:51,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:51,228 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-22 01:22:51,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:22:51,228 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-22 01:22:51,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 01:22:51,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:51,229 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:51,231 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 01:22:51,232 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:51,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:51,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-22 01:22:51,232 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:51,232 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [749439320] [2020-08-22 01:22:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:51,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:51,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:51,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:51,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-22 01:22:51,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 01:22:51,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,444 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:51,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [749439320] [2020-08-22 01:22:51,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:51,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 01:22:51,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046799808] [2020-08-22 01:22:51,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 01:22:51,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:51,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 01:22:51,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:22:51,448 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-22 01:22:51,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:51,645 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-22 01:22:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 01:22:51,647 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-22 01:22:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:51,650 INFO L225 Difference]: With dead ends: 312 [2020-08-22 01:22:51,650 INFO L226 Difference]: Without dead ends: 222 [2020-08-22 01:22:51,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:51,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-22 01:22:51,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-22 01:22:51,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 01:22:51,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-22 01:22:51,668 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-22 01:22:51,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:51,668 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-22 01:22:51,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 01:22:51,668 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-22 01:22:51,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 01:22:51,670 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:51,670 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:51,670 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 01:22:51,670 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:51,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:51,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-22 01:22:51,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:51,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [981997027] [2020-08-22 01:22:51,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:51,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:51,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:51,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-22 01:22:52,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:52,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:22:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,035 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:52,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [981997027] [2020-08-22 01:22:52,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:52,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:22:52,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829666201] [2020-08-22 01:22:52,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:22:52,043 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:22:52,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:52,044 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-22 01:22:52,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,438 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-22 01:22:52,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:22:52,438 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-22 01:22:52,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,440 INFO L225 Difference]: With dead ends: 274 [2020-08-22 01:22:52,440 INFO L226 Difference]: Without dead ends: 187 [2020-08-22 01:22:52,441 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:52,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-22 01:22:52,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-22 01:22:52,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-22 01:22:52,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-22 01:22:52,453 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-22 01:22:52,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,454 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-22 01:22:52,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:22:52,454 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-22 01:22:52,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 01:22:52,455 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,455 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,455 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 01:22:52,456 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,456 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-22 01:22:52,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [219090601] [2020-08-22 01:22:52,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:52,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 01:22:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-22 01:22:52,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:22:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,682 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:52,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [219090601] [2020-08-22 01:22:52,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:52,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 01:22:52,683 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771699266] [2020-08-22 01:22:52,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 01:22:52,684 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:52,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 01:22:52,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-22 01:22:52,684 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-22 01:22:52,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:52,855 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-22 01:22:52,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 01:22:52,855 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-22 01:22:52,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:52,857 INFO L225 Difference]: With dead ends: 329 [2020-08-22 01:22:52,858 INFO L226 Difference]: Without dead ends: 236 [2020-08-22 01:22:52,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:52,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-22 01:22:52,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-22 01:22:52,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-22 01:22:52,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-22 01:22:52,873 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-22 01:22:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:52,873 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-22 01:22:52,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 01:22:52,873 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-22 01:22:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 01:22:52,875 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:52,875 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:52,877 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 01:22:52,878 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:52,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:52,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-22 01:22:52,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:52,879 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [983298905] [2020-08-22 01:22:52,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:52,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:52,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 01:22:53,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:53,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 01:22:53,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,263 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:53,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [983298905] [2020-08-22 01:22:53,264 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:53,264 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:22:53,264 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787546560] [2020-08-22 01:22:53,265 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:22:53,265 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:53,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:22:53,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:53,266 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-22 01:22:53,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:53,882 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-22 01:22:53,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:22:53,883 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-22 01:22:53,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:53,885 INFO L225 Difference]: With dead ends: 286 [2020-08-22 01:22:53,885 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 01:22:53,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:53,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 01:22:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-22 01:22:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-22 01:22:53,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-22 01:22:53,903 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-22 01:22:53,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:53,904 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-22 01:22:53,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:22:53,904 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-22 01:22:53,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 01:22:53,906 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:53,906 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:53,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 01:22:53,906 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-22 01:22:53,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:53,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343703891] [2020-08-22 01:22:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:53,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:53,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:53,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-22 01:22:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 01:22:54,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:22:54,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,166 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:54,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343703891] [2020-08-22 01:22:54,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 01:22:54,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456209986] [2020-08-22 01:22:54,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 01:22:54,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 01:22:54,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:22:54,169 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-22 01:22:54,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,362 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-22 01:22:54,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 01:22:54,362 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-22 01:22:54,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,364 INFO L225 Difference]: With dead ends: 346 [2020-08-22 01:22:54,364 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 01:22:54,366 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 [2020-08-22 01:22:54,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 01:22:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-22 01:22:54,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-22 01:22:54,379 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-22 01:22:54,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,379 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-22 01:22:54,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 01:22:54,380 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-22 01:22:54,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 01:22:54,381 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,381 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 01:22:54,382 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,382 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-22 01:22:54,382 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,382 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964465762] [2020-08-22 01:22:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:54,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:54,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 01:22:54,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,446 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 01:22:54,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964465762] [2020-08-22 01:22:54,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:54,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-22 01:22:54,448 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333198040] [2020-08-22 01:22:54,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-22 01:22:54,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-22 01:22:54,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:22:54,449 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-22 01:22:54,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,464 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-22 01:22:54,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 01:22:54,465 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-22 01:22:54,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,466 INFO L225 Difference]: With dead ends: 160 [2020-08-22 01:22:54,466 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 01:22:54,467 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-22 01:22:54,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 01:22:54,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 01:22:54,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-22 01:22:54,479 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-22 01:22:54,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,479 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-22 01:22:54,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-22 01:22:54,480 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-22 01:22:54,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:22:54,482 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,482 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 01:22:54,482 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,483 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-22 01:22:54,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215761613] [2020-08-22 01:22:54,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,551 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:54,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:22:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-22 01:22:54,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215761613] [2020-08-22 01:22:54,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:22:54,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 01:22:54,603 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876265149] [2020-08-22 01:22:54,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 01:22:54,604 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:54,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 01:22:54,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 01:22:54,604 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-22 01:22:54,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:54,627 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-22 01:22:54,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 01:22:54,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-22 01:22:54,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:54,630 INFO L225 Difference]: With dead ends: 161 [2020-08-22 01:22:54,630 INFO L226 Difference]: Without dead ends: 149 [2020-08-22 01:22:54,631 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:22:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-22 01:22:54,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-22 01:22:54,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-22 01:22:54,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-22 01:22:54,642 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-22 01:22:54,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:54,642 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-22 01:22:54,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 01:22:54,643 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-22 01:22:54,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 01:22:54,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:54,644 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:54,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 01:22:54,644 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:54,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:54,645 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-22 01:22:54,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:54,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748641868] [2020-08-22 01:22:54,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:54,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:54,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:54,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:54,866 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 8 DAG size of output: 6 [2020-08-22 01:22:55,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-22 01:22:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:55,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:22:55,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,165 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:55,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748641868] [2020-08-22 01:22:55,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:55,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:22:55,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507589578] [2020-08-22 01:22:55,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:22:55,167 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:55,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:22:55,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:55,168 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-22 01:22:55,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:55,751 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-22 01:22:55,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:22:55,752 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-22 01:22:55,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:55,754 INFO L225 Difference]: With dead ends: 298 [2020-08-22 01:22:55,754 INFO L226 Difference]: Without dead ends: 205 [2020-08-22 01:22:55,755 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:55,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-22 01:22:55,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-22 01:22:55,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-22 01:22:55,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-22 01:22:55,769 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-22 01:22:55,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:55,770 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-22 01:22:55,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:22:55,770 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-22 01:22:55,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 01:22:55,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:55,772 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:55,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 01:22:55,772 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:55,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:55,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-22 01:22:55,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:55,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312114899] [2020-08-22 01:22:55,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:55,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:55,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:55,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:55,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 01:22:56,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-22 01:22:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 01:22:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,141 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:56,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312114899] [2020-08-22 01:22:56,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 01:22:56,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443812492] [2020-08-22 01:22:56,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 01:22:56,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 01:22:56,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-22 01:22:56,143 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-22 01:22:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:56,445 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-22 01:22:56,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 01:22:56,446 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-22 01:22:56,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:56,449 INFO L225 Difference]: With dead ends: 363 [2020-08-22 01:22:56,449 INFO L226 Difference]: Without dead ends: 264 [2020-08-22 01:22:56,451 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:56,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-22 01:22:56,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-22 01:22:56,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-22 01:22:56,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-22 01:22:56,470 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-22 01:22:56,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:56,470 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-22 01:22:56,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 01:22:56,471 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-22 01:22:56,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 01:22:56,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:56,473 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:56,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 01:22:56,474 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:56,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:56,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-22 01:22:56,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:56,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943265916] [2020-08-22 01:22:56,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:56,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:56,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:56,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:56,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 01:22:56,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:22:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 01:22:56,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:56,942 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:56,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943265916] [2020-08-22 01:22:56,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:56,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:22:56,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835923757] [2020-08-22 01:22:56,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:22:56,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:56,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:22:56,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:56,945 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-22 01:22:57,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:57,543 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-22 01:22:57,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:22:57,544 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-22 01:22:57,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:57,546 INFO L225 Difference]: With dead ends: 310 [2020-08-22 01:22:57,546 INFO L226 Difference]: Without dead ends: 214 [2020-08-22 01:22:57,547 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:57,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-22 01:22:57,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-22 01:22:57,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-22 01:22:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-22 01:22:57,561 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-22 01:22:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:57,562 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-22 01:22:57,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:22:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-22 01:22:57,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-22 01:22:57,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:57,563 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:57,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 01:22:57,564 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-22 01:22:57,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:57,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063150954] [2020-08-22 01:22:57,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:57,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:57,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:57,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-22 01:22:57,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 01:22:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,876 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:22:57,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:57,904 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:57,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063150954] [2020-08-22 01:22:57,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:57,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 01:22:57,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972704285] [2020-08-22 01:22:57,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 01:22:57,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:57,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 01:22:57,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-22 01:22:57,907 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-22 01:22:58,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:58,123 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-22 01:22:58,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 01:22:58,124 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-22 01:22:58,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:58,126 INFO L225 Difference]: With dead ends: 380 [2020-08-22 01:22:58,126 INFO L226 Difference]: Without dead ends: 278 [2020-08-22 01:22:58,127 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:58,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-22 01:22:58,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-22 01:22:58,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-22 01:22:58,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-22 01:22:58,144 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-22 01:22:58,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:58,145 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-22 01:22:58,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 01:22:58,145 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-22 01:22:58,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-22 01:22:58,146 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:58,146 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:58,147 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 01:22:58,147 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:58,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:58,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-22 01:22:58,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:58,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436290897] [2020-08-22 01:22:58,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:58,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:58,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:58,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:58,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-22 01:22:58,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:22:58,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 01:22:58,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:58,714 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:58,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436290897] [2020-08-22 01:22:58,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:58,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:22:58,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432994502] [2020-08-22 01:22:58,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:22:58,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:58,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:22:58,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:58,716 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-22 01:22:59,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:22:59,422 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-22 01:22:59,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:22:59,423 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-22 01:22:59,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:22:59,425 INFO L225 Difference]: With dead ends: 322 [2020-08-22 01:22:59,425 INFO L226 Difference]: Without dead ends: 223 [2020-08-22 01:22:59,426 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 [2020-08-22 01:22:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-22 01:22:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-22 01:22:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-22 01:22:59,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-22 01:22:59,439 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-22 01:22:59,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:22:59,439 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-22 01:22:59,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:22:59,439 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-22 01:22:59,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 01:22:59,440 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:22:59,441 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:22:59,441 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 01:22:59,441 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:22:59,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:22:59,441 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-22 01:22:59,442 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:22:59,442 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306341737] [2020-08-22 01:22:59,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:22:59,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:22:59,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:22:59,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:22:59,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 01:22:59,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-22 01:22:59,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 01:22:59,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:22:59,810 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:22:59,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306341737] [2020-08-22 01:22:59,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:22:59,811 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 01:22:59,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064030131] [2020-08-22 01:22:59,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 01:22:59,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:22:59,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 01:22:59,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-22 01:22:59,818 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-22 01:23:00,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:00,174 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-22 01:23:00,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 01:23:00,178 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-22 01:23:00,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:00,182 INFO L225 Difference]: With dead ends: 397 [2020-08-22 01:23:00,182 INFO L226 Difference]: Without dead ends: 292 [2020-08-22 01:23:00,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:00,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-22 01:23:00,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-22 01:23:00,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-22 01:23:00,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-22 01:23:00,214 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-22 01:23:00,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:00,215 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-22 01:23:00,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 01:23:00,215 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-22 01:23:00,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 01:23:00,217 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:00,217 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:00,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 01:23:00,218 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:00,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:00,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-22 01:23:00,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:00,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236746077] [2020-08-22 01:23:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:00,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:00,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:00,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 01:23:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 01:23:00,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,874 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 01:23:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:00,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236746077] [2020-08-22 01:23:00,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:00,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:23:00,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808841564] [2020-08-22 01:23:00,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:23:00,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:23:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:00,912 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-22 01:23:01,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:01,753 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-22 01:23:01,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:23:01,754 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-22 01:23:01,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:01,758 INFO L225 Difference]: With dead ends: 334 [2020-08-22 01:23:01,758 INFO L226 Difference]: Without dead ends: 232 [2020-08-22 01:23:01,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:01,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-22 01:23:01,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-22 01:23:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-22 01:23:01,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-22 01:23:01,780 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-22 01:23:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:01,781 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-22 01:23:01,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:23:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-22 01:23:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-22 01:23:01,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:01,783 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:01,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 01:23:01,783 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:01,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:01,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-22 01:23:01,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:01,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88285956] [2020-08-22 01:23:01,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:01,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:01,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:01,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-22 01:23:02,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 01:23:02,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 01:23:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:02,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88285956] [2020-08-22 01:23:02,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:02,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 01:23:02,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461238731] [2020-08-22 01:23:02,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 01:23:02,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 01:23:02,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-22 01:23:02,175 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-22 01:23:02,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:02,464 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-22 01:23:02,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 01:23:02,465 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-22 01:23:02,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:02,471 INFO L225 Difference]: With dead ends: 414 [2020-08-22 01:23:02,471 INFO L226 Difference]: Without dead ends: 306 [2020-08-22 01:23:02,472 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:02,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-22 01:23:02,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-22 01:23:02,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-22 01:23:02,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-22 01:23:02,490 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-22 01:23:02,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:02,490 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-22 01:23:02,490 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 01:23:02,490 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-22 01:23:02,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-22 01:23:02,492 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:02,492 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:02,492 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 01:23:02,492 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:02,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:02,492 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-22 01:23:02,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:02,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1956577035] [2020-08-22 01:23:02,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:02,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:02,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:02,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:02,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-22 01:23:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:23:03,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 01:23:03,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,025 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:03,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1956577035] [2020-08-22 01:23:03,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:03,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:03,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590543787] [2020-08-22 01:23:03,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:03,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:03,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:03,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:03,027 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-22 01:23:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:03,893 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-22 01:23:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:03,894 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-22 01:23:03,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:03,898 INFO L225 Difference]: With dead ends: 346 [2020-08-22 01:23:03,898 INFO L226 Difference]: Without dead ends: 241 [2020-08-22 01:23:03,899 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:03,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-22 01:23:03,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-22 01:23:03,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-22 01:23:03,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-22 01:23:03,915 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-22 01:23:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:03,916 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-22 01:23:03,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:03,916 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-22 01:23:03,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-22 01:23:03,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:03,918 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:03,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 01:23:03,919 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-22 01:23:03,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:03,919 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [562342639] [2020-08-22 01:23:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:03,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:03,955 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:03,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 01:23:04,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-22 01:23:04,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 01:23:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,351 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:04,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [562342639] [2020-08-22 01:23:04,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:04,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 01:23:04,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788896419] [2020-08-22 01:23:04,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 01:23:04,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 01:23:04,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-22 01:23:04,355 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-22 01:23:04,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:04,674 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-22 01:23:04,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 01:23:04,677 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-22 01:23:04,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:04,679 INFO L225 Difference]: With dead ends: 431 [2020-08-22 01:23:04,680 INFO L226 Difference]: Without dead ends: 320 [2020-08-22 01:23:04,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:04,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-22 01:23:04,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-22 01:23:04,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-22 01:23:04,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-22 01:23:04,695 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-22 01:23:04,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:04,696 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-22 01:23:04,696 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 01:23:04,696 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-22 01:23:04,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-22 01:23:04,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:04,697 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:04,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 01:23:04,697 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:04,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:04,698 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-22 01:23:04,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:04,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [427571135] [2020-08-22 01:23:04,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:04,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:04,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:04,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:04,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 01:23:05,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 01:23:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 01:23:05,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:05,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [427571135] [2020-08-22 01:23:05,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:05,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:05,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875673196] [2020-08-22 01:23:05,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:05,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:05,233 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-22 01:23:05,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:05,994 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-22 01:23:05,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:23:05,995 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-22 01:23:05,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:05,997 INFO L225 Difference]: With dead ends: 358 [2020-08-22 01:23:05,997 INFO L226 Difference]: Without dead ends: 250 [2020-08-22 01:23:05,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:05,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-22 01:23:06,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-22 01:23:06,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-22 01:23:06,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-22 01:23:06,012 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-22 01:23:06,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:06,013 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-22 01:23:06,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:06,013 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-22 01:23:06,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-22 01:23:06,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:06,014 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:06,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 01:23:06,014 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:06,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:06,015 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-22 01:23:06,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:06,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418998986] [2020-08-22 01:23:06,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:06,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:06,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:06,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:06,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-22 01:23:06,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-22 01:23:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,417 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:06,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418998986] [2020-08-22 01:23:06,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:06,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 01:23:06,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835479420] [2020-08-22 01:23:06,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 01:23:06,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:06,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 01:23:06,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-22 01:23:06,419 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-22 01:23:06,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:06,691 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-22 01:23:06,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 01:23:06,692 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-22 01:23:06,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:06,695 INFO L225 Difference]: With dead ends: 448 [2020-08-22 01:23:06,695 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 01:23:06,696 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:06,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 01:23:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-22 01:23:06,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-22 01:23:06,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-22 01:23:06,724 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-22 01:23:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:06,724 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-22 01:23:06,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 01:23:06,725 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-22 01:23:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-22 01:23:06,726 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:06,726 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:06,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 01:23:06,726 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:06,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:06,726 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-22 01:23:06,727 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:06,727 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1856019417] [2020-08-22 01:23:06,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:06,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:06,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:06,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:06,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:06,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-22 01:23:07,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 01:23:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 01:23:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:07,335 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:07,335 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1856019417] [2020-08-22 01:23:07,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:07,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:23:07,336 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235681332] [2020-08-22 01:23:07,336 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:23:07,336 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:07,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:23:07,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:07,337 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-22 01:23:08,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:08,240 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-22 01:23:08,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:08,241 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-22 01:23:08,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:08,243 INFO L225 Difference]: With dead ends: 370 [2020-08-22 01:23:08,243 INFO L226 Difference]: Without dead ends: 259 [2020-08-22 01:23:08,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:08,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-22 01:23:08,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-22 01:23:08,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-22 01:23:08,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-22 01:23:08,260 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-22 01:23:08,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:08,261 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-22 01:23:08,261 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:23:08,261 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-22 01:23:08,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-22 01:23:08,262 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:08,262 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:08,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 01:23:08,263 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:08,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:08,263 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-22 01:23:08,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:08,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28790616] [2020-08-22 01:23:08,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:08,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:08,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:08,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 01:23:08,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-22 01:23:08,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-22 01:23:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:08,736 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28790616] [2020-08-22 01:23:08,736 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:08,736 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 01:23:08,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873701697] [2020-08-22 01:23:08,737 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 01:23:08,737 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:08,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 01:23:08,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-22 01:23:08,738 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-22 01:23:09,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:09,098 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-22 01:23:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 01:23:09,102 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-22 01:23:09,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:09,105 INFO L225 Difference]: With dead ends: 465 [2020-08-22 01:23:09,105 INFO L226 Difference]: Without dead ends: 348 [2020-08-22 01:23:09,106 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 [2020-08-22 01:23:09,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-22 01:23:09,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-22 01:23:09,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-22 01:23:09,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-22 01:23:09,125 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-22 01:23:09,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:09,126 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-22 01:23:09,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 01:23:09,126 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-22 01:23:09,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-22 01:23:09,128 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:09,128 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:09,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 01:23:09,128 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:09,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:09,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-22 01:23:09,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:09,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [66976658] [2020-08-22 01:23:09,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:09,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:09,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:09,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:09,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 01:23:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 01:23:09,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 01:23:09,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:09,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [66976658] [2020-08-22 01:23:09,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:09,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:09,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696323050] [2020-08-22 01:23:09,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:09,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:09,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:09,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:09,797 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-22 01:23:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:10,882 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-22 01:23:10,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:23:10,888 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-22 01:23:10,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:10,890 INFO L225 Difference]: With dead ends: 382 [2020-08-22 01:23:10,890 INFO L226 Difference]: Without dead ends: 268 [2020-08-22 01:23:10,893 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:10,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-22 01:23:10,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-22 01:23:10,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-22 01:23:10,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-22 01:23:10,912 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-22 01:23:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:10,914 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-22 01:23:10,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-22 01:23:10,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-22 01:23:10,915 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:10,916 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:10,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-22 01:23:10,916 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:10,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:10,916 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-22 01:23:10,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:10,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718689729] [2020-08-22 01:23:10,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:10,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:10,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:10,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:10,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-22 01:23:11,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-22 01:23:11,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-22 01:23:11,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,411 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:11,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718689729] [2020-08-22 01:23:11,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:11,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 01:23:11,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027072369] [2020-08-22 01:23:11,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 01:23:11,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:11,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 01:23:11,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-22 01:23:11,414 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-22 01:23:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:11,834 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-22 01:23:11,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 01:23:11,839 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-22 01:23:11,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:11,842 INFO L225 Difference]: With dead ends: 482 [2020-08-22 01:23:11,842 INFO L226 Difference]: Without dead ends: 362 [2020-08-22 01:23:11,843 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:11,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-22 01:23:11,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-22 01:23:11,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-22 01:23:11,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-22 01:23:11,862 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-22 01:23:11,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:11,862 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-22 01:23:11,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 01:23:11,862 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-22 01:23:11,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-22 01:23:11,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:11,864 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:11,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-22 01:23:11,864 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:11,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:11,864 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-22 01:23:11,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:11,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584456766] [2020-08-22 01:23:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,901 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:11,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:11,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:11,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-22 01:23:12,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 01:23:12,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-22 01:23:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:12,612 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:12,613 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584456766] [2020-08-22 01:23:12,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:12,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:12,613 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54556761] [2020-08-22 01:23:12,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:12,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:12,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:12,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:12,614 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-22 01:23:13,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:13,903 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-22 01:23:13,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:23:13,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-22 01:23:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:13,906 INFO L225 Difference]: With dead ends: 394 [2020-08-22 01:23:13,906 INFO L226 Difference]: Without dead ends: 277 [2020-08-22 01:23:13,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:13,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-22 01:23:13,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-22 01:23:13,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-22 01:23:13,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-22 01:23:13,925 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-22 01:23:13,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:13,925 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-22 01:23:13,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:13,926 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-22 01:23:13,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-22 01:23:13,928 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:13,928 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:13,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-22 01:23:13,928 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:13,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:13,929 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-22 01:23:13,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:13,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935969136] [2020-08-22 01:23:13,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:13,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:13,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:13,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:13,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:13,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-22 01:23:14,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-22 01:23:14,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-22 01:23:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:14,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935969136] [2020-08-22 01:23:14,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:14,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 01:23:14,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26825920] [2020-08-22 01:23:14,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 01:23:14,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 01:23:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-22 01:23:14,438 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-22 01:23:14,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:14,857 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-22 01:23:14,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 01:23:14,858 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-22 01:23:14,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:14,860 INFO L225 Difference]: With dead ends: 499 [2020-08-22 01:23:14,860 INFO L226 Difference]: Without dead ends: 376 [2020-08-22 01:23:14,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:14,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-22 01:23:14,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-22 01:23:14,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-22 01:23:14,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-22 01:23:14,881 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-22 01:23:14,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:14,882 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-22 01:23:14,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 01:23:14,882 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-22 01:23:14,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-22 01:23:14,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:14,883 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:14,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-22 01:23:14,883 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:14,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:14,884 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-22 01:23:14,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:14,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443247016] [2020-08-22 01:23:14,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:14,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:14,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:14,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:14,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:14,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-22 01:23:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-22 01:23:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:15,594 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:15,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443247016] [2020-08-22 01:23:15,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:15,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:15,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108819059] [2020-08-22 01:23:15,595 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:15,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:15,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:15,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:15,596 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-22 01:23:16,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:16,947 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-22 01:23:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:23:16,951 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-22 01:23:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:16,953 INFO L225 Difference]: With dead ends: 406 [2020-08-22 01:23:16,953 INFO L226 Difference]: Without dead ends: 286 [2020-08-22 01:23:16,954 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:16,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-22 01:23:16,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-22 01:23:16,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-22 01:23:16,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-22 01:23:16,973 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-22 01:23:16,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:16,973 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-22 01:23:16,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:16,973 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-22 01:23:16,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-22 01:23:16,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:16,979 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:16,979 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-22 01:23:16,979 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:16,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:16,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-22 01:23:16,980 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:16,980 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168516338] [2020-08-22 01:23:16,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:17,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:17,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-22 01:23:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-22 01:23:17,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-22 01:23:17,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,562 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:17,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168516338] [2020-08-22 01:23:17,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:17,563 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 01:23:17,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32898772] [2020-08-22 01:23:17,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 01:23:17,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 01:23:17,564 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-22 01:23:17,564 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-22 01:23:17,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:17,915 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-22 01:23:17,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 01:23:17,916 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-22 01:23:17,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:17,918 INFO L225 Difference]: With dead ends: 516 [2020-08-22 01:23:17,918 INFO L226 Difference]: Without dead ends: 390 [2020-08-22 01:23:17,920 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:17,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-22 01:23:17,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-22 01:23:17,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-22 01:23:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-22 01:23:17,939 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-22 01:23:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:17,939 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-22 01:23:17,939 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 01:23:17,939 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-22 01:23:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-22 01:23:17,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:17,941 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:17,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-22 01:23:17,941 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:17,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:17,941 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-22 01:23:17,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:17,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310579985] [2020-08-22 01:23:17,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:17,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,975 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:17,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:17,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:17,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:17,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-22 01:23:18,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 01:23:18,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-22 01:23:18,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:18,773 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:18,773 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310579985] [2020-08-22 01:23:18,773 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:18,773 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:23:18,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111587172] [2020-08-22 01:23:18,776 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:23:18,776 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:18,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:23:18,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:18,777 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-22 01:23:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:20,245 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-22 01:23:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:23:20,246 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-22 01:23:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:20,248 INFO L225 Difference]: With dead ends: 418 [2020-08-22 01:23:20,248 INFO L226 Difference]: Without dead ends: 295 [2020-08-22 01:23:20,249 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 [2020-08-22 01:23:20,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-22 01:23:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-22 01:23:20,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-22 01:23:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-22 01:23:20,271 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-22 01:23:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:20,271 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-22 01:23:20,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:23:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-22 01:23:20,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-22 01:23:20,272 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:20,273 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:20,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-22 01:23:20,273 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:20,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:20,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-22 01:23:20,274 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:20,274 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363543375] [2020-08-22 01:23:20,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:20,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:20,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:20,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-22 01:23:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-22 01:23:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-22 01:23:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:20,884 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-22 01:23:20,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363543375] [2020-08-22 01:23:20,885 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:20,885 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 01:23:20,885 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697655331] [2020-08-22 01:23:20,886 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 01:23:20,886 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:20,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 01:23:20,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-22 01:23:20,887 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-22 01:23:21,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:21,400 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-22 01:23:21,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 01:23:21,401 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-22 01:23:21,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:21,403 INFO L225 Difference]: With dead ends: 533 [2020-08-22 01:23:21,403 INFO L226 Difference]: Without dead ends: 404 [2020-08-22 01:23:21,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-22 01:23:21,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-22 01:23:21,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-22 01:23:21,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-22 01:23:21,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-22 01:23:21,425 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-22 01:23:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:21,425 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-22 01:23:21,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 01:23:21,425 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-22 01:23:21,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 01:23:21,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:21,427 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:21,427 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-22 01:23:21,427 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:21,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:21,427 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-22 01:23:21,428 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:21,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181593568] [2020-08-22 01:23:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:21,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:21,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:21,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:21,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:21,659 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 01:23:21,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181593568] [2020-08-22 01:23:21,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:21,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-22 01:23:21,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810441129] [2020-08-22 01:23:21,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:21,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:21,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:21,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:21,662 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-22 01:23:22,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:22,139 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-22 01:23:22,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:22,140 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 01:23:22,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:22,143 INFO L225 Difference]: With dead ends: 271 [2020-08-22 01:23:22,143 INFO L226 Difference]: Without dead ends: 261 [2020-08-22 01:23:22,143 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:22,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-22 01:23:22,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-22 01:23:22,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-22 01:23:22,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-22 01:23:22,165 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-22 01:23:22,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:22,166 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-22 01:23:22,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:22,166 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-22 01:23:22,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-22 01:23:22,167 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:22,168 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:22,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-22 01:23:22,168 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:22,168 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-22 01:23:22,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:22,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705613590] [2020-08-22 01:23:22,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:22,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:22,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:22,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:22,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,446 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:22,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705613590] [2020-08-22 01:23:22,447 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:22,447 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 01:23:22,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645946930] [2020-08-22 01:23:22,448 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 01:23:22,448 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:22,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 01:23:22,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:22,449 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-22 01:23:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:22,724 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-22 01:23:22,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:22,727 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-22 01:23:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:22,730 INFO L225 Difference]: With dead ends: 285 [2020-08-22 01:23:22,730 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 01:23:22,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-22 01:23:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 01:23:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-22 01:23:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 01:23:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-22 01:23:22,780 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-22 01:23:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:22,781 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-22 01:23:22,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 01:23:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-22 01:23:22,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 01:23:22,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:22,783 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:22,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-22 01:23:22,784 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:22,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-22 01:23:22,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:22,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1574096034] [2020-08-22 01:23:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:22,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:22,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:22,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:22,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:22,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:22,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-22 01:23:22,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1574096034] [2020-08-22 01:23:22,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:22,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 01:23:22,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952780206] [2020-08-22 01:23:22,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 01:23:22,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:22,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 01:23:22,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 01:23:22,915 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-22 01:23:22,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:22,971 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-22 01:23:22,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 01:23:22,972 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-22 01:23:22,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:22,976 INFO L225 Difference]: With dead ends: 271 [2020-08-22 01:23:22,976 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 01:23:22,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:22,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 01:23:23,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-22 01:23:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-22 01:23:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-22 01:23:23,021 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-22 01:23:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:23,021 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-22 01:23:23,021 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 01:23:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-22 01:23:23,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-22 01:23:23,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:23,024 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:23,024 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-22 01:23:23,024 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:23,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:23,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-22 01:23:23,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:23,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1584889361] [2020-08-22 01:23:23,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:23,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,226 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:23,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:23,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:23,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1584889361] [2020-08-22 01:23:23,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:23,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 01:23:23,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743982529] [2020-08-22 01:23:23,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 01:23:23,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:23,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 01:23:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:23:23,355 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-22 01:23:23,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:23,617 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-22 01:23:23,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:23,618 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-22 01:23:23,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:23,620 INFO L225 Difference]: With dead ends: 284 [2020-08-22 01:23:23,620 INFO L226 Difference]: Without dead ends: 274 [2020-08-22 01:23:23,621 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-22 01:23:23,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-22 01:23:23,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-22 01:23:23,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-22 01:23:23,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-22 01:23:23,649 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-22 01:23:23,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:23,649 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-22 01:23:23,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 01:23:23,649 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-22 01:23:23,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-22 01:23:23,651 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:23,652 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:23,652 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-22 01:23:23,652 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:23,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:23,652 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-22 01:23:23,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:23,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1612058224] [2020-08-22 01:23:23,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:23,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:23,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:23,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:23,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-22 01:23:23,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,795 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-22 01:23:23,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1612058224] [2020-08-22 01:23:23,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:23,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:23:23,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783867886] [2020-08-22 01:23:23,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:23:23,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:23,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:23:23,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:23,797 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-22 01:23:23,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:23,918 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-22 01:23:23,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:23:23,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-22 01:23:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:23,921 INFO L225 Difference]: With dead ends: 303 [2020-08-22 01:23:23,921 INFO L226 Difference]: Without dead ends: 280 [2020-08-22 01:23:23,922 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-22 01:23:23,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-22 01:23:23,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-22 01:23:23,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-22 01:23:23,951 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-22 01:23:23,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:23,952 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-22 01:23:23,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:23:23,952 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-22 01:23:23,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-22 01:23:23,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:23,954 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:23,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-22 01:23:23,954 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:23,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:23,955 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-22 01:23:23,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:23,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033468016] [2020-08-22 01:23:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:23,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:23,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:23,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-22 01:23:24,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-22 01:23:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-22 01:23:24,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033468016] [2020-08-22 01:23:24,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:24,075 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 01:23:24,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943447177] [2020-08-22 01:23:24,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 01:23:24,076 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:24,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 01:23:24,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:23:24,077 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-22 01:23:24,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,187 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-22 01:23:24,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 01:23:24,188 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-22 01:23:24,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,190 INFO L225 Difference]: With dead ends: 409 [2020-08-22 01:23:24,190 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 01:23:24,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 01:23:24,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 01:23:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-22 01:23:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:24,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 01:23:24,210 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-22 01:23:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,210 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 01:23:24,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 01:23:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 01:23:24,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 01:23:24,211 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,212 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:24,212 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-22 01:23:24,212 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,212 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-22 01:23:24,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187146514] [2020-08-22 01:23:24,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:24,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:24,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:24,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,365 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:24,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-22 01:23:24,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187146514] [2020-08-22 01:23:24,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 01:23:24,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-22 01:23:24,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188352438] [2020-08-22 01:23:24,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:23:24,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:24,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:23:24,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:24,384 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-22 01:23:24,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,506 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-22 01:23:24,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 01:23:24,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-22 01:23:24,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,509 INFO L225 Difference]: With dead ends: 158 [2020-08-22 01:23:24,509 INFO L226 Difference]: Without dead ends: 143 [2020-08-22 01:23:24,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-08-22 01:23:24,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-22 01:23:24,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-22 01:23:24,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:24,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-22 01:23:24,543 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-22 01:23:24,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,543 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-22 01:23:24,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:23:24,543 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-22 01:23:24,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 01:23:24,544 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,545 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, 1, 1, 1] [2020-08-22 01:23:24,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-22 01:23:24,545 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,545 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-22 01:23:24,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936238148] [2020-08-22 01:23:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:24,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:24,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:24,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,695 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 01:23:24,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936238148] [2020-08-22 01:23:24,696 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:24,696 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:23:24,696 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861021929] [2020-08-22 01:23:24,697 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:23:24,697 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:24,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:23:24,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:23:24,697 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-22 01:23:24,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:24,812 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-22 01:23:24,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 01:23:24,813 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 01:23:24,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:24,814 INFO L225 Difference]: With dead ends: 176 [2020-08-22 01:23:24,815 INFO L226 Difference]: Without dead ends: 166 [2020-08-22 01:23:24,815 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 [2020-08-22 01:23:24,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-22 01:23:24,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-22 01:23:24,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-22 01:23:24,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-22 01:23:24,842 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-22 01:23:24,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:24,842 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-22 01:23:24,842 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:23:24,842 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-22 01:23:24,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-22 01:23:24,843 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:24,844 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, 1, 1, 1] [2020-08-22 01:23:24,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-22 01:23:24,844 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:24,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:24,844 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-22 01:23:24,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:24,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274583725] [2020-08-22 01:23:24,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:24,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,907 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:24,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:24,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:24,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-22 01:23:24,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:24,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-22 01:23:24,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,033 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-22 01:23:25,033 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274583725] [2020-08-22 01:23:25,033 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,034 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:23:25,034 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625264155] [2020-08-22 01:23:25,034 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:23:25,035 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:23:25,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:23:25,035 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-22 01:23:25,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,238 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-22 01:23:25,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 01:23:25,239 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-22 01:23:25,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,240 INFO L225 Difference]: With dead ends: 170 [2020-08-22 01:23:25,240 INFO L226 Difference]: Without dead ends: 150 [2020-08-22 01:23:25,241 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-08-22 01:23:25,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-22 01:23:25,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-22 01:23:25,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-22 01:23:25,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-22 01:23:25,262 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-22 01:23:25,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,262 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-22 01:23:25,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:23:25,263 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-22 01:23:25,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:25,264 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,264 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-22 01:23:25,264 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,265 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-22 01:23:25,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133917236] [2020-08-22 01:23:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:25,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:25,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 01:23:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133917236] [2020-08-22 01:23:25,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 01:23:25,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886924129] [2020-08-22 01:23:25,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 01:23:25,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 01:23:25,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-22 01:23:25,419 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-22 01:23:25,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,512 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-22 01:23:25,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 01:23:25,513 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-22 01:23:25,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,515 INFO L225 Difference]: With dead ends: 173 [2020-08-22 01:23:25,515 INFO L226 Difference]: Without dead ends: 163 [2020-08-22 01:23:25,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:23:25,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-22 01:23:25,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-22 01:23:25,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-22 01:23:25,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-22 01:23:25,538 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-22 01:23:25,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,538 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-22 01:23:25,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 01:23:25,539 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-22 01:23:25,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-22 01:23:25,540 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 01:23:25,540 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 01:23:25,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-22 01:23:25,540 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 01:23:25,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 01:23:25,541 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-22 01:23:25,541 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 01:23:25,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718636474] [2020-08-22 01:23:25,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 01:23:25,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 01:23:25,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-22 01:23:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-22 01:23:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-22 01:23:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-22 01:23:25,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-22 01:23:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 01:23:25,794 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-22 01:23:25,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718636474] [2020-08-22 01:23:25,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 01:23:25,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 01:23:25,795 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058722127] [2020-08-22 01:23:25,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 01:23:25,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 01:23:25,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 01:23:25,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-22 01:23:25,796 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-22 01:23:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 01:23:25,969 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-22 01:23:25,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 01:23:25,969 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-22 01:23:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 01:23:25,970 INFO L225 Difference]: With dead ends: 157 [2020-08-22 01:23:25,970 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 01:23:25,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-08-22 01:23:25,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 01:23:25,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 01:23:25,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 01:23:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 01:23:25,973 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-22 01:23:25,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 01:23:25,973 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 01:23:25,973 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 01:23:25,973 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 01:23:25,974 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 01:23:25,974 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-22 01:23:25,977 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.