/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -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 0.1.25-5644d1e-m [2020-08-19 06:46:16,092 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:46:16,095 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:46:16,119 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:46:16,120 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:46:16,121 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:46:16,122 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:46:16,124 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:46:16,126 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:46:16,127 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:46:16,128 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:46:16,129 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:46:16,129 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:46:16,130 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:46:16,132 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:46:16,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:46:16,134 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:46:16,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:46:16,137 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:46:16,139 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:46:16,141 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:46:16,142 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:46:16,143 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:46:16,144 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:46:16,147 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-19 06:46:16,147 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-19 06:46:16,147 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-19 06:46:16,148 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-19 06:46:16,149 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-19 06:46:16,150 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-19 06:46:16,155 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:46:16,156 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:46:16,156 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:46:16,157 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:46:16,180 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:46:16,180 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:46:16,184 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:46:16,184 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:46:16,184 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:46:16,184 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:46:16,184 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:46:16,185 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:46:16,187 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:46:16,187 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:46:16,187 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:46:16,187 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:46:16,188 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:46:16,188 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:46:16,188 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:46:16,188 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:46:16,188 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:46:16,188 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:46:16,189 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:46:16,189 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:46:16,189 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:46:16,189 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:46:16,189 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:46:16,190 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:46:16,191 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:46:16,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:46:16,524 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:46:16,528 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:46:16,529 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:46:16,530 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:46:16,531 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-19 06:46:16,604 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5232a3109/c74edd86f45b479d911569dd3dd59903/FLAG3112c9ecf [2020-08-19 06:46:17,121 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:46:17,122 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_5a.c.cil.c [2020-08-19 06:46:17,131 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5232a3109/c74edd86f45b479d911569dd3dd59903/FLAG3112c9ecf [2020-08-19 06:46:17,453 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5232a3109/c74edd86f45b479d911569dd3dd59903 [2020-08-19 06:46:17,463 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:46:17,465 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:46:17,466 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:46:17,466 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:46:17,469 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:46:17,470 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,474 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5ab41b77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17, skipping insertion in model container [2020-08-19 06:46:17,474 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,482 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:46:17,535 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:46:17,755 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:46:17,759 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:46:17,917 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:46:17,929 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:46:17,930 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17 WrapperNode [2020-08-19 06:46:17,930 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:46:17,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:46:17,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:46:17,931 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:46:17,944 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,944 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,952 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,952 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,969 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,971 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,975 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:46:17,976 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:46:17,976 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:46:17,976 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:46:17,977 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:46:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:46:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:46:18,037 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:46:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 06:46:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 06:46:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 06:46:18,038 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:46:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:46:18,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 06:46:18,039 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:46:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:46:18,040 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:46:18,473 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:46:18,473 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 06:46:18,479 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:46:18 BoogieIcfgContainer [2020-08-19 06:46:18,479 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:46:18,480 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:46:18,480 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:46:18,484 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:46:18,484 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:46:17" (1/3) ... [2020-08-19 06:46:18,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba95d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:46:18, skipping insertion in model container [2020-08-19 06:46:18,485 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (2/3) ... [2020-08-19 06:46:18,485 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ba95d3b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:46:18, skipping insertion in model container [2020-08-19 06:46:18,486 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:46:18" (3/3) ... [2020-08-19 06:46:18,487 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_5a.c.cil.c [2020-08-19 06:46:18,498 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:46:18,506 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:46:18,520 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:46:18,547 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:46:18,547 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:46:18,547 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:46:18,548 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:46:18,548 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:46:18,548 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:46:18,548 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:46:18,549 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:46:18,570 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-19 06:46:18,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 06:46:18,579 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:18,581 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:18,581 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:18,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:18,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-19 06:46:18,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:18,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306391] [2020-08-19 06:46:18,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 06:46:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 06:46:18,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:18,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:18,974 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306391] [2020-08-19 06:46:18,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:18,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 06:46:18,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684449333] [2020-08-19 06:46:18,982 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:18,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:18,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:18,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:19,000 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-19 06:46:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,179 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-19 06:46:19,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:46:19,181 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-19 06:46:19,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,195 INFO L225 Difference]: With dead ends: 136 [2020-08-19 06:46:19,195 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 06:46:19,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:19,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 06:46:19,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-19 06:46:19,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 06:46:19,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-19 06:46:19,256 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-19 06:46:19,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,256 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-19 06:46:19,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:19,257 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-19 06:46:19,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:46:19,260 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,261 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:46:19,261 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,262 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-19 06:46:19,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840042111] [2020-08-19 06:46:19,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:46:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:46:19,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:19,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,402 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:19,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840042111] [2020-08-19 06:46:19,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:19,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 06:46:19,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616364813] [2020-08-19 06:46:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:19,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:19,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:19,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:19,407 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-19 06:46:19,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,512 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-19 06:46:19,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:46:19,513 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-19 06:46:19,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,516 INFO L225 Difference]: With dead ends: 129 [2020-08-19 06:46:19,516 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 06:46:19,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:19,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 06:46:19,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-19 06:46:19,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 06:46:19,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-19 06:46:19,551 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-19 06:46:19,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,552 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-19 06:46:19,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:19,552 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-19 06:46:19,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:46:19,555 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,555 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:46:19,555 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-19 06:46:19,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007460412] [2020-08-19 06:46:19,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,602 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:46:19,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:46:19,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:46:19,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:19,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007460412] [2020-08-19 06:46:19,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:19,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:19,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246411568] [2020-08-19 06:46:19,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:19,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:19,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:19,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:19,725 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-19 06:46:19,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,862 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-19 06:46:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:19,863 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-19 06:46:19,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,865 INFO L225 Difference]: With dead ends: 145 [2020-08-19 06:46:19,865 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:46:19,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:19,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:46:19,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-19 06:46:19,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 06:46:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-19 06:46:19,883 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-19 06:46:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,884 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-19 06:46:19,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-19 06:46:19,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 06:46:19,887 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,887 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:46:19,887 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,888 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-19 06:46:19,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013487553] [2020-08-19 06:46:19,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:46:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:46:20,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:20,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,044 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013487553] [2020-08-19 06:46:20,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,044 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:20,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761552785] [2020-08-19 06:46:20,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:20,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:20,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:20,050 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-19 06:46:20,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,162 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-19 06:46:20,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:20,164 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-19 06:46:20,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,169 INFO L225 Difference]: With dead ends: 156 [2020-08-19 06:46:20,169 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 06:46:20,173 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:20,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 06:46:20,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-19 06:46:20,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:46:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-19 06:46:20,202 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-19 06:46:20,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,203 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-19 06:46:20,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-19 06:46:20,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:46:20,209 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,210 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:20,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:46:20,210 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,213 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-19 06:46:20,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011740144] [2020-08-19 06:46:20,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 06:46:20,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:20,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:46:20,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,352 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011740144] [2020-08-19 06:46:20,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:46:20,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689767477] [2020-08-19 06:46:20,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:20,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:20,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:20,355 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-19 06:46:20,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,471 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-19 06:46:20,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:46:20,472 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-19 06:46:20,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,474 INFO L225 Difference]: With dead ends: 166 [2020-08-19 06:46:20,474 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 06:46:20,475 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:20,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 06:46:20,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-19 06:46:20,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 06:46:20,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-19 06:46:20,491 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-19 06:46:20,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,492 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-19 06:46:20,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:20,492 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-19 06:46:20,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:46:20,495 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,495 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:20,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:46:20,495 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,496 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-19 06:46:20,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339242043] [2020-08-19 06:46:20,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,527 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 06:46:20,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:46:20,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339242043] [2020-08-19 06:46:20,632 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:46:20,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530733522] [2020-08-19 06:46:20,633 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:20,633 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:20,635 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-19 06:46:20,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,754 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 06:46:20,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:46:20,755 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 06:46:20,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,760 INFO L225 Difference]: With dead ends: 176 [2020-08-19 06:46:20,760 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 06:46:20,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:20,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 06:46:20,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-19 06:46:20,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 06:46:20,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-19 06:46:20,788 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-19 06:46:20,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,790 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-19 06:46:20,790 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-19 06:46:20,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 06:46:20,792 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,792 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:20,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:46:20,792 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,793 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-19 06:46:20,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950022568] [2020-08-19 06:46:20,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 06:46:20,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:20,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:46:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,997 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950022568] [2020-08-19 06:46:20,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:46:20,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877850004] [2020-08-19 06:46:20,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:46:21,000 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:46:21,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:21,001 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-19 06:46:21,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,156 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-19 06:46:21,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:46:21,158 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-19 06:46:21,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,161 INFO L225 Difference]: With dead ends: 178 [2020-08-19 06:46:21,161 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 06:46:21,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:21,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 06:46:21,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-19 06:46:21,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 06:46:21,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-19 06:46:21,194 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-19 06:46:21,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,200 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-19 06:46:21,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:46:21,200 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-19 06:46:21,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 06:46:21,203 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,203 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:46:21,204 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-19 06:46:21,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360347831] [2020-08-19 06:46:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:46:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 06:46:21,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:21,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,328 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360347831] [2020-08-19 06:46:21,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:46:21,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063266245] [2020-08-19 06:46:21,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:46:21,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:46:21,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:21,331 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-19 06:46:21,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,428 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-19 06:46:21,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:46:21,429 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-19 06:46:21,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,431 INFO L225 Difference]: With dead ends: 193 [2020-08-19 06:46:21,431 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 06:46:21,432 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:21,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 06:46:21,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-19 06:46:21,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 06:46:21,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-19 06:46:21,447 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-19 06:46:21,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,448 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-19 06:46:21,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:46:21,448 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-19 06:46:21,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:46:21,449 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,449 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,450 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:46:21,450 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,450 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-19 06:46:21,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689435823] [2020-08-19 06:46:21,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:46:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:46:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689435823] [2020-08-19 06:46:21,642 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,642 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:46:21,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024626511] [2020-08-19 06:46:21,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:21,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:21,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:21,651 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-19 06:46:21,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,837 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-19 06:46:21,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:21,838 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-19 06:46:21,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,839 INFO L225 Difference]: With dead ends: 190 [2020-08-19 06:46:21,839 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 06:46:21,840 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 [2020-08-19 06:46:21,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 06:46:21,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-19 06:46:21,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 06:46:21,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-19 06:46:21,853 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-19 06:46:21,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,853 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-19 06:46:21,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:21,853 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-19 06:46:21,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 06:46:21,855 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,855 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:46:21,855 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-19 06:46:21,856 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,856 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708646928] [2020-08-19 06:46:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:46:21,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708646928] [2020-08-19 06:46:21,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:46:21,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585764413] [2020-08-19 06:46:21,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:21,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:21,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:21,977 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-19 06:46:22,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:22,080 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-19 06:46:22,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:22,080 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 06:46:22,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:22,082 INFO L225 Difference]: With dead ends: 210 [2020-08-19 06:46:22,082 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 06:46:22,083 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:22,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 06:46:22,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-19 06:46:22,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 06:46:22,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-19 06:46:22,093 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-19 06:46:22,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,094 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-19 06:46:22,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:22,094 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-19 06:46:22,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 06:46:22,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,095 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,095 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:46:22,095 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,096 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-19 06:46:22,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875162629] [2020-08-19 06:46:22,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:46:22,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:22,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:46:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,287 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875162629] [2020-08-19 06:46:22,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,288 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:22,288 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786938723] [2020-08-19 06:46:22,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:22,289 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:22,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:22,289 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-19 06:46:22,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:22,437 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-19 06:46:22,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:22,438 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-19 06:46:22,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:22,439 INFO L225 Difference]: With dead ends: 202 [2020-08-19 06:46:22,439 INFO L226 Difference]: Without dead ends: 133 [2020-08-19 06:46:22,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:22,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-19 06:46:22,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-19 06:46:22,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-19 06:46:22,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-19 06:46:22,450 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-19 06:46:22,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,450 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-19 06:46:22,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:22,450 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-19 06:46:22,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:46:22,451 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,451 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,452 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:46:22,452 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-19 06:46:22,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528500664] [2020-08-19 06:46:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,470 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:22,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 06:46:22,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:22,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,578 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528500664] [2020-08-19 06:46:22,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,578 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:22,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688125611] [2020-08-19 06:46:22,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:22,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:22,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:22,580 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-19 06:46:22,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:22,690 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-19 06:46:22,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:22,691 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 06:46:22,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:22,693 INFO L225 Difference]: With dead ends: 227 [2020-08-19 06:46:22,693 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 06:46:22,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:22,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 06:46:22,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-19 06:46:22,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 06:46:22,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-19 06:46:22,706 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-19 06:46:22,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,707 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-19 06:46:22,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:22,707 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-19 06:46:22,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:46:22,708 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,708 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:46:22,709 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-19 06:46:22,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851427605] [2020-08-19 06:46:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,732 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:46:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:22,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,888 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:46:22,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,898 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851427605] [2020-08-19 06:46:22,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:22,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594559377] [2020-08-19 06:46:22,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:22,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:22,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:22,900 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-19 06:46:23,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:23,105 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-19 06:46:23,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:46:23,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 06:46:23,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:23,107 INFO L225 Difference]: With dead ends: 214 [2020-08-19 06:46:23,107 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 06:46:23,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:23,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 06:46:23,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-19 06:46:23,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 06:46:23,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-19 06:46:23,118 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-19 06:46:23,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:23,119 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-19 06:46:23,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:23,119 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-19 06:46:23,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 06:46:23,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:23,120 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:23,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:46:23,121 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:23,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:23,121 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-19 06:46:23,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:23,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952537509] [2020-08-19 06:46:23,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:23,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:23,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:23,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:23,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:23,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:46:23,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:23,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:23,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952537509] [2020-08-19 06:46:23,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:23,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:23,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661877031] [2020-08-19 06:46:23,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:23,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:23,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:23,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:23,253 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-19 06:46:23,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:23,385 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-19 06:46:23,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:46:23,385 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-19 06:46:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:23,387 INFO L225 Difference]: With dead ends: 244 [2020-08-19 06:46:23,387 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 06:46:23,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:23,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 06:46:23,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-19 06:46:23,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 06:46:23,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-19 06:46:23,400 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-19 06:46:23,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:23,401 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-19 06:46:23,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:23,401 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-19 06:46:23,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 06:46:23,402 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:23,403 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:23,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:46:23,403 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:23,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:23,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-19 06:46:23,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:23,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058431409] [2020-08-19 06:46:23,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:23,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:23,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:23,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:46:23,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:46:23,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:23,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058431409] [2020-08-19 06:46:23,654 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:23,654 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:46:23,654 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11745055] [2020-08-19 06:46:23,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:23,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:23,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:23,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:23,656 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-19 06:46:23,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:23,900 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-19 06:46:23,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:46:23,901 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-19 06:46:23,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:23,903 INFO L225 Difference]: With dead ends: 226 [2020-08-19 06:46:23,904 INFO L226 Difference]: Without dead ends: 151 [2020-08-19 06:46:23,906 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:23,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-19 06:46:23,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-19 06:46:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 06:46:23,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-19 06:46:23,921 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-19 06:46:23,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:23,921 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-19 06:46:23,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:23,921 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-19 06:46:23,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 06:46:23,922 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:23,923 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:23,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:46:23,923 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:23,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:23,924 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-19 06:46:23,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:23,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900074772] [2020-08-19 06:46:23,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:23,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:23,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 06:46:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,068 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:24,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900074772] [2020-08-19 06:46:24,071 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:24,071 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:46:24,071 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228068182] [2020-08-19 06:46:24,072 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:24,072 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:24,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:24,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:24,073 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-19 06:46:24,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:24,200 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-19 06:46:24,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:46:24,201 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-19 06:46:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:24,202 INFO L225 Difference]: With dead ends: 261 [2020-08-19 06:46:24,203 INFO L226 Difference]: Without dead ends: 180 [2020-08-19 06:46:24,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:24,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-19 06:46:24,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-19 06:46:24,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-19 06:46:24,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-19 06:46:24,215 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-19 06:46:24,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:24,215 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-19 06:46:24,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:24,215 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-19 06:46:24,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 06:46:24,216 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:24,216 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:24,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:46:24,217 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:24,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:24,217 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-19 06:46:24,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:24,218 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947635126] [2020-08-19 06:46:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:24,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:24,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:46:24,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:24,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:24,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,504 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:24,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947635126] [2020-08-19 06:46:24,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:24,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:24,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31735199] [2020-08-19 06:46:24,506 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:24,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:24,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:24,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:24,507 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-19 06:46:24,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:24,766 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-19 06:46:24,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:46:24,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 06:46:24,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:24,768 INFO L225 Difference]: With dead ends: 238 [2020-08-19 06:46:24,768 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 06:46:24,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:24,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 06:46:24,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-19 06:46:24,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 06:46:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-19 06:46:24,781 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-19 06:46:24,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:24,781 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-19 06:46:24,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-19 06:46:24,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 06:46:24,783 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:24,783 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:24,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:46:24,783 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:24,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:24,784 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-19 06:46:24,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:24,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226944220] [2020-08-19 06:46:24,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:24,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:24,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:24,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:24,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:46:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:24,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:24,955 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226944220] [2020-08-19 06:46:24,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:24,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:24,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731763901] [2020-08-19 06:46:24,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:24,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:24,957 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-19 06:46:25,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:25,142 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-19 06:46:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:46:25,142 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-19 06:46:25,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:25,145 INFO L225 Difference]: With dead ends: 278 [2020-08-19 06:46:25,145 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 06:46:25,147 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:25,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 06:46:25,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-19 06:46:25,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 06:46:25,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-19 06:46:25,162 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-19 06:46:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:25,163 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-19 06:46:25,163 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:25,163 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-19 06:46:25,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 06:46:25,164 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:25,164 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:25,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:46:25,165 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:25,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:25,165 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-19 06:46:25,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:25,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622386580] [2020-08-19 06:46:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:25,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:25,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,192 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:25,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:46:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:25,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:46:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:25,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622386580] [2020-08-19 06:46:25,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:25,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:46:25,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164234181] [2020-08-19 06:46:25,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:46:25,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:25,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:46:25,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:25,499 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-19 06:46:25,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:25,795 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-19 06:46:25,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:46:25,796 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-19 06:46:25,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:25,797 INFO L225 Difference]: With dead ends: 250 [2020-08-19 06:46:25,797 INFO L226 Difference]: Without dead ends: 169 [2020-08-19 06:46:25,798 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 [2020-08-19 06:46:25,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-19 06:46:25,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-19 06:46:25,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 06:46:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-19 06:46:25,810 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-19 06:46:25,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:25,810 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-19 06:46:25,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:46:25,810 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-19 06:46:25,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 06:46:25,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:25,812 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:25,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:46:25,813 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:25,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:25,813 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-19 06:46:25,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:25,814 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77367117] [2020-08-19 06:46:25,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:25,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:25,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:25,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:26,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-19 06:46:26,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:26,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:26,048 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77367117] [2020-08-19 06:46:26,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:26,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:46:26,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734695571] [2020-08-19 06:46:26,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:46:26,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:26,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:46:26,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:26,050 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-19 06:46:26,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:26,220 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-19 06:46:26,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:46:26,221 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-19 06:46:26,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:26,224 INFO L225 Difference]: With dead ends: 295 [2020-08-19 06:46:26,224 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 06:46:26,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:26,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 06:46:26,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-19 06:46:26,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 06:46:26,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-19 06:46:26,249 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-19 06:46:26,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:26,249 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-19 06:46:26,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:46:26,250 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-19 06:46:26,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 06:46:26,257 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:26,257 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:26,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:46:26,258 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:26,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:26,258 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-19 06:46:26,259 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:26,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082412582] [2020-08-19 06:46:26,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:26,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:26,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:26,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:46:26,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 06:46:26,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,605 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:26,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082412582] [2020-08-19 06:46:26,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:26,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:46:26,607 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588557493] [2020-08-19 06:46:26,608 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:46:26,608 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:26,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:46:26,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:26,608 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-19 06:46:27,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:27,013 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-19 06:46:27,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:46:27,014 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-19 06:46:27,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:27,015 INFO L225 Difference]: With dead ends: 262 [2020-08-19 06:46:27,015 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 06:46:27,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:27,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 06:46:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-19 06:46:27,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-19 06:46:27,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-19 06:46:27,030 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-19 06:46:27,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:27,031 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-19 06:46:27,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:46:27,031 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-19 06:46:27,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 06:46:27,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:27,032 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:27,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:46:27,034 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:27,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:27,035 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-19 06:46:27,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:27,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017549929] [2020-08-19 06:46:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:27,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:27,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:27,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:27,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:46:27,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,265 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:27,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017549929] [2020-08-19 06:46:27,267 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:27,267 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:46:27,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163604346] [2020-08-19 06:46:27,268 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:46:27,268 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:27,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:46:27,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:27,269 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-19 06:46:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:27,458 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-19 06:46:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:46:27,459 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-19 06:46:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:27,461 INFO L225 Difference]: With dead ends: 312 [2020-08-19 06:46:27,461 INFO L226 Difference]: Without dead ends: 222 [2020-08-19 06:46:27,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:27,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-19 06:46:27,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-19 06:46:27,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 06:46:27,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-19 06:46:27,476 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-19 06:46:27,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:27,476 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-19 06:46:27,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:46:27,476 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-19 06:46:27,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 06:46:27,477 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:27,478 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:27,478 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:46:27,478 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:27,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:27,478 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-19 06:46:27,479 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:27,479 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192941461] [2020-08-19 06:46:27,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:27,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:46:27,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:27,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:46:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,758 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:27,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192941461] [2020-08-19 06:46:27,759 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:27,759 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:46:27,759 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506660661] [2020-08-19 06:46:27,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:46:27,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:27,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:46:27,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:27,761 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-19 06:46:28,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:28,228 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-19 06:46:28,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:46:28,229 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-19 06:46:28,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:28,231 INFO L225 Difference]: With dead ends: 274 [2020-08-19 06:46:28,231 INFO L226 Difference]: Without dead ends: 187 [2020-08-19 06:46:28,232 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 [2020-08-19 06:46:28,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-19 06:46:28,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-19 06:46:28,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-19 06:46:28,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-19 06:46:28,246 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-19 06:46:28,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:28,246 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-19 06:46:28,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:46:28,246 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-19 06:46:28,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 06:46:28,247 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:28,248 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:28,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:46:28,248 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:28,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:28,248 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-19 06:46:28,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:28,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034129898] [2020-08-19 06:46:28,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:28,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:28,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:28,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:28,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 06:46:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:28,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,458 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:28,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034129898] [2020-08-19 06:46:28,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:28,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:46:28,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029966348] [2020-08-19 06:46:28,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:46:28,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:28,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:46:28,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:28,460 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-19 06:46:28,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:28,637 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-19 06:46:28,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:46:28,637 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-19 06:46:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:28,640 INFO L225 Difference]: With dead ends: 329 [2020-08-19 06:46:28,640 INFO L226 Difference]: Without dead ends: 236 [2020-08-19 06:46:28,641 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:28,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-19 06:46:28,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-19 06:46:28,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-19 06:46:28,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-19 06:46:28,654 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-19 06:46:28,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:28,655 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-19 06:46:28,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:46:28,655 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-19 06:46:28,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 06:46:28,656 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:28,656 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:28,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:46:28,657 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:28,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:28,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-19 06:46:28,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:28,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671927796] [2020-08-19 06:46:28,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:28,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:28,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:28,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:46:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:46:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,968 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:28,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671927796] [2020-08-19 06:46:28,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:28,969 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:46:28,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245016438] [2020-08-19 06:46:28,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:46:28,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:28,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:46:28,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:28,970 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-19 06:46:29,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:29,429 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-19 06:46:29,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:46:29,430 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-19 06:46:29,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:29,432 INFO L225 Difference]: With dead ends: 286 [2020-08-19 06:46:29,432 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 06:46:29,433 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 [2020-08-19 06:46:29,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 06:46:29,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-19 06:46:29,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 06:46:29,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-19 06:46:29,446 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-19 06:46:29,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:29,447 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-19 06:46:29,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:46:29,447 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-19 06:46:29,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 06:46:29,448 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:29,448 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:29,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:46:29,449 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:29,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:29,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-19 06:46:29,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:29,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156553139] [2020-08-19 06:46:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:29,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:29,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:29,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:29,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:46:29,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:29,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,685 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:29,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156553139] [2020-08-19 06:46:29,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:29,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:46:29,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883385414] [2020-08-19 06:46:29,688 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:46:29,688 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:29,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:46:29,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:29,689 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-19 06:46:29,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:29,920 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-19 06:46:29,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:46:29,921 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-19 06:46:29,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:29,923 INFO L225 Difference]: With dead ends: 346 [2020-08-19 06:46:29,923 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:46:29,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:46:29,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-19 06:46:29,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:29,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-19 06:46:29,942 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-19 06:46:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:29,943 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-19 06:46:29,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:46:29,943 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-19 06:46:29,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 06:46:29,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:29,945 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:29,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:46:29,945 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:29,946 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-19 06:46:29,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:29,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860231924] [2020-08-19 06:46:29,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:29,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:30,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:30,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:30,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:46:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,026 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 06:46:30,027 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860231924] [2020-08-19 06:46:30,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:30,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:46:30,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098859553] [2020-08-19 06:46:30,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:46:30,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:30,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:46:30,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:46:30,029 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-19 06:46:30,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:30,045 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-19 06:46:30,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:46:30,046 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-19 06:46:30,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:30,048 INFO L225 Difference]: With dead ends: 160 [2020-08-19 06:46:30,048 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 06:46:30,048 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:46:30,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 06:46:30,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 06:46:30,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:30,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-19 06:46:30,066 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-19 06:46:30,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:30,066 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-19 06:46:30,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:46:30,066 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-19 06:46:30,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:46:30,068 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:30,068 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:30,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:46:30,068 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:30,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:30,069 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-19 06:46:30,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:30,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408868760] [2020-08-19 06:46:30,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:30,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:30,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:30,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:30,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 06:46:30,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408868760] [2020-08-19 06:46:30,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:30,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:46:30,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587106060] [2020-08-19 06:46:30,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:30,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:30,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:30,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:30,147 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-19 06:46:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:30,173 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-19 06:46:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:46:30,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-19 06:46:30,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:30,175 INFO L225 Difference]: With dead ends: 161 [2020-08-19 06:46:30,176 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 06:46:30,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:30,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 06:46:30,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 06:46:30,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:30,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-19 06:46:30,189 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-19 06:46:30,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:30,189 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-19 06:46:30,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:30,189 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-19 06:46:30,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:46:30,191 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:30,191 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:30,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:46:30,191 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:30,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:30,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-19 06:46:30,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:30,192 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339684534] [2020-08-19 06:46:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:30,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:30,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,595 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:30,596 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339684534] [2020-08-19 06:46:30,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:30,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:46:30,597 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281426946] [2020-08-19 06:46:30,597 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:46:30,597 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:30,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:46:30,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:30,598 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-19 06:46:31,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:31,146 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-19 06:46:31,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:46:31,147 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-19 06:46:31,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:31,148 INFO L225 Difference]: With dead ends: 298 [2020-08-19 06:46:31,149 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 06:46:31,150 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 06:46:31,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-19 06:46:31,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-19 06:46:31,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-19 06:46:31,163 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-19 06:46:31,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:31,163 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-19 06:46:31,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:46:31,164 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-19 06:46:31,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 06:46:31,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:31,165 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:31,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 06:46:31,166 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:31,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:31,166 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-19 06:46:31,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:31,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144239617] [2020-08-19 06:46:31,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:31,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:31,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:31,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:31,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-19 06:46:31,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 06:46:31,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,426 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:31,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144239617] [2020-08-19 06:46:31,427 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:31,427 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:46:31,427 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175694304] [2020-08-19 06:46:31,428 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:46:31,428 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:31,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:46:31,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:31,429 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-19 06:46:31,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:31,676 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-19 06:46:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:46:31,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-19 06:46:31,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:31,679 INFO L225 Difference]: With dead ends: 363 [2020-08-19 06:46:31,679 INFO L226 Difference]: Without dead ends: 264 [2020-08-19 06:46:31,680 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:31,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-19 06:46:31,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-19 06:46:31,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-19 06:46:31,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-19 06:46:31,695 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-19 06:46:31,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:31,695 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-19 06:46:31,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:46:31,695 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-19 06:46:31,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 06:46:31,697 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:31,697 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:31,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 06:46:31,697 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:31,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:31,698 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-19 06:46:31,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:31,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449068324] [2020-08-19 06:46:31,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:31,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:46:32,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:32,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 06:46:32,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,117 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:32,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449068324] [2020-08-19 06:46:32,117 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:32,118 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:46:32,118 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222721341] [2020-08-19 06:46:32,118 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:46:32,118 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:32,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:46:32,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:32,119 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-19 06:46:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:32,684 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-19 06:46:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:46:32,684 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-19 06:46:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:32,689 INFO L225 Difference]: With dead ends: 310 [2020-08-19 06:46:32,689 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 06:46:32,690 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 [2020-08-19 06:46:32,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 06:46:32,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-19 06:46:32,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 06:46:32,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-19 06:46:32,705 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-19 06:46:32,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:32,706 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-19 06:46:32,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:46:32,706 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-19 06:46:32,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-19 06:46:32,707 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:32,707 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:32,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 06:46:32,708 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:32,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:32,708 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-19 06:46:32,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:32,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [727545875] [2020-08-19 06:46:32,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:32,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:32,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:32,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:46:32,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,992 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:46:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:33,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [727545875] [2020-08-19 06:46:33,018 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:33,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:46:33,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311398554] [2020-08-19 06:46:33,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:46:33,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:33,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:46:33,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:33,020 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-19 06:46:33,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:33,215 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-19 06:46:33,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:46:33,216 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-19 06:46:33,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:33,218 INFO L225 Difference]: With dead ends: 380 [2020-08-19 06:46:33,218 INFO L226 Difference]: Without dead ends: 278 [2020-08-19 06:46:33,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:33,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-19 06:46:33,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-19 06:46:33,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-19 06:46:33,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-19 06:46:33,236 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-19 06:46:33,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:33,236 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-19 06:46:33,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:46:33,237 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-19 06:46:33,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 06:46:33,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:33,239 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:33,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 06:46:33,239 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:33,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:33,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-19 06:46:33,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:33,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142988229] [2020-08-19 06:46:33,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:33,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:33,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:33,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:33,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 06:46:33,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:46:33,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:33,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142988229] [2020-08-19 06:46:33,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:33,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:46:33,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079419874] [2020-08-19 06:46:33,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:46:33,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:33,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:46:33,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:33,799 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-19 06:46:34,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:34,435 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-19 06:46:34,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:46:34,436 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 06:46:34,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:34,442 INFO L225 Difference]: With dead ends: 322 [2020-08-19 06:46:34,442 INFO L226 Difference]: Without dead ends: 223 [2020-08-19 06:46:34,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:34,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-19 06:46:34,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-19 06:46:34,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-19 06:46:34,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-19 06:46:34,465 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-19 06:46:34,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:34,465 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-19 06:46:34,465 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:46:34,466 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-19 06:46:34,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 06:46:34,467 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:34,468 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:34,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 06:46:34,468 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:34,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:34,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-19 06:46:34,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:34,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808765990] [2020-08-19 06:46:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:34,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:34,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:34,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:34,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 06:46:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 06:46:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,810 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:34,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808765990] [2020-08-19 06:46:34,810 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:34,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:46:34,811 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74088917] [2020-08-19 06:46:34,811 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:46:34,811 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:34,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:46:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:34,812 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-19 06:46:35,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:35,065 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-19 06:46:35,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:46:35,066 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-19 06:46:35,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:35,068 INFO L225 Difference]: With dead ends: 397 [2020-08-19 06:46:35,068 INFO L226 Difference]: Without dead ends: 292 [2020-08-19 06:46:35,069 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:35,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-19 06:46:35,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-19 06:46:35,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-19 06:46:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-19 06:46:35,088 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-19 06:46:35,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:35,088 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-19 06:46:35,088 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:46:35,088 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-19 06:46:35,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 06:46:35,090 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:35,090 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:35,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 06:46:35,090 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:35,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:35,090 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-19 06:46:35,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:35,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464093478] [2020-08-19 06:46:35,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:35,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:35,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:46:35,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 06:46:35,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 06:46:35,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,731 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:35,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464093478] [2020-08-19 06:46:35,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:35,732 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 06:46:35,732 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360379634] [2020-08-19 06:46:35,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 06:46:35,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:35,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 06:46:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:35,735 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-19 06:46:36,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:36,534 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-19 06:46:36,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:46:36,535 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-19 06:46:36,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:36,538 INFO L225 Difference]: With dead ends: 334 [2020-08-19 06:46:36,539 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 06:46:36,540 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 [2020-08-19 06:46:36,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 06:46:36,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-19 06:46:36,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 06:46:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-19 06:46:36,574 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-19 06:46:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:36,575 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-19 06:46:36,575 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 06:46:36,575 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-19 06:46:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-19 06:46:36,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:36,578 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:36,578 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 06:46:36,578 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:36,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:36,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-19 06:46:36,579 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:36,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315940891] [2020-08-19 06:46:36,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:36,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:36,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:36,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:37,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:37,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:46:37,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:37,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315940891] [2020-08-19 06:46:37,092 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:37,092 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 06:46:37,093 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128366770] [2020-08-19 06:46:37,093 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 06:46:37,093 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:37,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 06:46:37,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:37,095 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-19 06:46:37,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:37,491 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-19 06:46:37,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:46:37,491 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-19 06:46:37,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:37,493 INFO L225 Difference]: With dead ends: 414 [2020-08-19 06:46:37,493 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 06:46:37,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 06:46:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-19 06:46:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-19 06:46:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-19 06:46:37,512 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-19 06:46:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:37,513 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-19 06:46:37,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 06:46:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-19 06:46:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 06:46:37,514 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:37,514 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:37,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 06:46:37,515 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:37,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:37,515 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-19 06:46:37,515 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:37,516 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757637664] [2020-08-19 06:46:37,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:37,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,559 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:37,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:46:38,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:46:38,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:46:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,052 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:38,052 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757637664] [2020-08-19 06:46:38,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:38,052 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:46:38,052 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358240960] [2020-08-19 06:46:38,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:46:38,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:38,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:46:38,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:38,055 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-19 06:46:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:38,820 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-19 06:46:38,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:46:38,821 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-19 06:46:38,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:38,825 INFO L225 Difference]: With dead ends: 346 [2020-08-19 06:46:38,825 INFO L226 Difference]: Without dead ends: 241 [2020-08-19 06:46:38,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:38,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-19 06:46:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-19 06:46:38,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 06:46:38,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-19 06:46:38,842 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-19 06:46:38,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:38,843 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-19 06:46:38,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:46:38,843 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-19 06:46:38,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 06:46:38,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:38,848 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:38,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 06:46:38,848 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:38,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-19 06:46:38,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:38,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142770057] [2020-08-19 06:46:38,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:38,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:38,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:38,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:39,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 06:46:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 06:46:39,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,235 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:39,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142770057] [2020-08-19 06:46:39,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:39,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:46:39,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829416564] [2020-08-19 06:46:39,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:46:39,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:39,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:46:39,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:39,238 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-19 06:46:39,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:39,597 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-19 06:46:39,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:46:39,598 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-19 06:46:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:39,601 INFO L225 Difference]: With dead ends: 431 [2020-08-19 06:46:39,601 INFO L226 Difference]: Without dead ends: 320 [2020-08-19 06:46:39,602 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:39,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-19 06:46:39,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-19 06:46:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-19 06:46:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-19 06:46:39,618 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-19 06:46:39,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:39,619 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-19 06:46:39,619 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:46:39,619 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-19 06:46:39,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 06:46:39,621 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:39,621 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:39,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 06:46:39,621 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:39,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:39,622 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-19 06:46:39,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:39,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492065359] [2020-08-19 06:46:39,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:39,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:39,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:39,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:46:40,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 06:46:40,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:46:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,125 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:40,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492065359] [2020-08-19 06:46:40,125 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:40,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:46:40,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143577957] [2020-08-19 06:46:40,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:46:40,126 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:40,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:46:40,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:40,127 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-19 06:46:40,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:40,922 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-19 06:46:40,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 06:46:40,923 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-19 06:46:40,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:40,925 INFO L225 Difference]: With dead ends: 358 [2020-08-19 06:46:40,925 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:46:40,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:40,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:46:40,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-19 06:46:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-19 06:46:40,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-19 06:46:40,942 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-19 06:46:40,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:40,942 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-19 06:46:40,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:46:40,942 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-19 06:46:40,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 06:46:40,944 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:40,944 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:40,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 06:46:40,944 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:40,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:40,945 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-19 06:46:40,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:40,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713076937] [2020-08-19 06:46:40,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:40,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:40,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:40,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,980 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:40,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 06:46:41,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:46:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:41,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,420 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:41,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713076937] [2020-08-19 06:46:41,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:41,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:46:41,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007892593] [2020-08-19 06:46:41,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:46:41,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:41,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:46:41,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:41,423 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-19 06:46:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:41,723 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-19 06:46:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 06:46:41,724 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 06:46:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:41,727 INFO L225 Difference]: With dead ends: 448 [2020-08-19 06:46:41,727 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 06:46:41,730 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:41,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 06:46:41,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-19 06:46:41,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 06:46:41,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-19 06:46:41,768 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-19 06:46:41,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:41,769 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-19 06:46:41,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:46:41,769 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-19 06:46:41,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 06:46:41,771 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:41,772 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:41,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 06:46:41,772 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:41,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:41,773 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-19 06:46:41,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:41,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795327094] [2020-08-19 06:46:41,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:41,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 06:46:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:46:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:46:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,429 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:42,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795327094] [2020-08-19 06:46:42,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:42,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:46:42,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912769936] [2020-08-19 06:46:42,431 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:46:42,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:42,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:46:42,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:42,432 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-19 06:46:43,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:43,300 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-19 06:46:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:46:43,301 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-19 06:46:43,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:43,303 INFO L225 Difference]: With dead ends: 370 [2020-08-19 06:46:43,303 INFO L226 Difference]: Without dead ends: 259 [2020-08-19 06:46:43,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:43,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-19 06:46:43,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-19 06:46:43,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-19 06:46:43,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-19 06:46:43,321 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-19 06:46:43,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:43,321 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-19 06:46:43,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:46:43,321 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-19 06:46:43,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 06:46:43,323 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:43,323 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:43,323 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 06:46:43,323 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:43,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:43,324 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-19 06:46:43,324 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:43,324 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816927709] [2020-08-19 06:46:43,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:43,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:43,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:43,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:46:43,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 06:46:43,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-19 06:46:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:43,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816927709] [2020-08-19 06:46:43,789 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:43,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:46:43,790 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599209929] [2020-08-19 06:46:43,790 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:46:43,790 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:43,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:46:43,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:43,791 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-19 06:46:44,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:44,130 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-19 06:46:44,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:46:44,131 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-19 06:46:44,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:44,134 INFO L225 Difference]: With dead ends: 465 [2020-08-19 06:46:44,134 INFO L226 Difference]: Without dead ends: 348 [2020-08-19 06:46:44,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:44,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-19 06:46:44,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-19 06:46:44,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-19 06:46:44,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-19 06:46:44,153 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-19 06:46:44,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:44,154 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-19 06:46:44,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:46:44,154 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-19 06:46:44,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-19 06:46:44,156 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:44,156 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:44,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 06:46:44,156 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:44,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:44,157 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-19 06:46:44,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:44,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203051886] [2020-08-19 06:46:44,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,726 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:46:44,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 06:46:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,730 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 06:46:44,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:44,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203051886] [2020-08-19 06:46:44,757 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:44,757 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 06:46:44,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067157809] [2020-08-19 06:46:44,758 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 06:46:44,758 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:44,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 06:46:44,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:44,759 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-19 06:46:45,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:45,896 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-19 06:46:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 06:46:45,899 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-19 06:46:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:45,901 INFO L225 Difference]: With dead ends: 382 [2020-08-19 06:46:45,901 INFO L226 Difference]: Without dead ends: 268 [2020-08-19 06:46:45,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:45,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-19 06:46:45,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-19 06:46:45,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 06:46:45,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-19 06:46:45,920 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-19 06:46:45,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:45,921 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-19 06:46:45,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 06:46:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-19 06:46:45,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 06:46:45,923 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:45,923 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:45,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 06:46:45,924 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:45,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:45,924 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-19 06:46:45,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:45,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26496284] [2020-08-19 06:46:45,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:45,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:45,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:45,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 06:46:46,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:46:46,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:46:46,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,566 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:46,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26496284] [2020-08-19 06:46:46,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:46,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 06:46:46,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121828971] [2020-08-19 06:46:46,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 06:46:46,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:46,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 06:46:46,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:46,569 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-19 06:46:46,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:46,998 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-19 06:46:46,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 06:46:46,998 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-19 06:46:46,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:47,001 INFO L225 Difference]: With dead ends: 482 [2020-08-19 06:46:47,001 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 06:46:47,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:47,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 06:46:47,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-19 06:46:47,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-19 06:46:47,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-19 06:46:47,022 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-19 06:46:47,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:47,022 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-19 06:46:47,022 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 06:46:47,023 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-19 06:46:47,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 06:46:47,024 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:47,024 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:47,025 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 06:46:47,025 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:47,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:47,025 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-19 06:46:47,025 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:47,026 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710917461] [2020-08-19 06:46:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:47,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,066 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:47,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 06:46:47,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:46:47,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:46:47,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:47,703 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:47,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710917461] [2020-08-19 06:46:47,704 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:47,704 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:46:47,704 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721513553] [2020-08-19 06:46:47,704 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:46:47,705 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:47,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:46:47,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:47,705 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-19 06:46:48,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:48,903 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-19 06:46:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:46:48,904 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-19 06:46:48,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:48,906 INFO L225 Difference]: With dead ends: 394 [2020-08-19 06:46:48,906 INFO L226 Difference]: Without dead ends: 277 [2020-08-19 06:46:48,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:48,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-19 06:46:48,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-19 06:46:48,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-19 06:46:48,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-19 06:46:48,925 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-19 06:46:48,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:48,926 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-19 06:46:48,926 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:46:48,926 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-19 06:46:48,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 06:46:48,927 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:48,928 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] [2020-08-19 06:46:48,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 06:46:48,928 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:48,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:48,929 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-19 06:46:48,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:48,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558545438] [2020-08-19 06:46:48,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:48,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:48,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:46:49,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:46:49,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-19 06:46:49,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,436 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:49,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558545438] [2020-08-19 06:46:49,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:49,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:46:49,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145424045] [2020-08-19 06:46:49,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:46:49,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:49,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:46:49,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:49,438 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-19 06:46:49,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:49,875 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-19 06:46:49,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:46:49,876 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-19 06:46:49,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:49,879 INFO L225 Difference]: With dead ends: 499 [2020-08-19 06:46:49,880 INFO L226 Difference]: Without dead ends: 376 [2020-08-19 06:46:49,881 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 [2020-08-19 06:46:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-19 06:46:49,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-19 06:46:49,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-19 06:46:49,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-19 06:46:49,901 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-19 06:46:49,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:49,902 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-19 06:46:49,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:46:49,902 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-19 06:46:49,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-19 06:46:49,903 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:49,903 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:49,904 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-19 06:46:49,904 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:49,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:49,904 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-19 06:46:49,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:49,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860513712] [2020-08-19 06:46:49,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:49,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:49,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,941 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:49,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:49,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:46:50,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-19 06:46:50,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:50,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,631 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:50,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860513712] [2020-08-19 06:46:50,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:50,632 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:46:50,632 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589988048] [2020-08-19 06:46:50,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:46:50,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:50,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:46:50,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:50,633 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-19 06:46:51,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:51,951 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-19 06:46:51,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:46:51,954 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-19 06:46:51,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:51,956 INFO L225 Difference]: With dead ends: 406 [2020-08-19 06:46:51,957 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 06:46:51,958 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 [2020-08-19 06:46:51,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 06:46:51,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-19 06:46:51,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 06:46:51,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-19 06:46:51,976 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-19 06:46:51,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:51,976 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-19 06:46:51,976 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:46:51,977 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-19 06:46:51,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 06:46:51,978 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:51,978 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:51,978 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-19 06:46:51,979 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:51,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:51,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-19 06:46:51,979 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:51,979 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418136965] [2020-08-19 06:46:51,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:52,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:52,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:52,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 06:46:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,494 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:46:52,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:46:52,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,530 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:52,531 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418136965] [2020-08-19 06:46:52,531 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:52,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:46:52,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645261843] [2020-08-19 06:46:52,532 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:46:52,532 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:52,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:46:52,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:52,533 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-19 06:46:52,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:52,848 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-19 06:46:52,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:46:52,852 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-19 06:46:52,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:52,854 INFO L225 Difference]: With dead ends: 516 [2020-08-19 06:46:52,854 INFO L226 Difference]: Without dead ends: 390 [2020-08-19 06:46:52,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-19 06:46:52,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-19 06:46:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-19 06:46:52,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-19 06:46:52,874 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-19 06:46:52,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:52,874 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-19 06:46:52,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:46:52,875 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-19 06:46:52,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 06:46:52,876 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:52,876 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:52,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-19 06:46:52,877 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:52,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-19 06:46:52,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:52,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299421612] [2020-08-19 06:46:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:52,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:52,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:53,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 06:46:53,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:53,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:46:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:53,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:46:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:53,605 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:53,606 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299421612] [2020-08-19 06:46:53,606 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:53,606 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:46:53,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873259666] [2020-08-19 06:46:53,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:46:53,607 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:53,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:46:53,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:53,607 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-19 06:46:55,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:55,038 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-19 06:46:55,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:46:55,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-19 06:46:55,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:55,041 INFO L225 Difference]: With dead ends: 418 [2020-08-19 06:46:55,041 INFO L226 Difference]: Without dead ends: 295 [2020-08-19 06:46:55,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:46:55,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-19 06:46:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-19 06:46:55,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-19 06:46:55,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-19 06:46:55,068 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-19 06:46:55,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:55,069 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-19 06:46:55,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:46:55,069 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-19 06:46:55,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 06:46:55,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:55,070 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:55,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-19 06:46:55,070 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:55,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-19 06:46:55,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:55,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809634578] [2020-08-19 06:46:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:55,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:55,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:46:55,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 06:46:55,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-19 06:46:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,659 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:55,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809634578] [2020-08-19 06:46:55,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:55,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:46:55,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756933445] [2020-08-19 06:46:55,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:46:55,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:55,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:46:55,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:55,661 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-19 06:46:56,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:56,118 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-19 06:46:56,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:46:56,118 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-19 06:46:56,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:56,120 INFO L225 Difference]: With dead ends: 533 [2020-08-19 06:46:56,121 INFO L226 Difference]: Without dead ends: 404 [2020-08-19 06:46:56,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:46:56,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-19 06:46:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-19 06:46:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-19 06:46:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-19 06:46:56,143 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-19 06:46:56,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:56,144 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-19 06:46:56,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:46:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-19 06:46:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 06:46:56,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:56,145 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:56,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-19 06:46:56,146 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:56,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-19 06:46:56,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:56,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131704428] [2020-08-19 06:46:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:56,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:56,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:56,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:56,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:56,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:56,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 06:46:56,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131704428] [2020-08-19 06:46:56,375 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:56,375 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 06:46:56,375 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014843981] [2020-08-19 06:46:56,376 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:56,376 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:56,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:56,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:56,377 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-19 06:46:56,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:56,757 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-19 06:46:56,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:56,758 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 06:46:56,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:56,760 INFO L225 Difference]: With dead ends: 271 [2020-08-19 06:46:56,760 INFO L226 Difference]: Without dead ends: 261 [2020-08-19 06:46:56,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:56,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-19 06:46:56,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-19 06:46:56,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-19 06:46:56,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-19 06:46:56,788 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-19 06:46:56,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:56,788 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-19 06:46:56,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:56,789 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-19 06:46:56,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 06:46:56,790 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:56,790 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:56,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-19 06:46:56,791 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:56,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:56,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-19 06:46:56,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:56,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062195818] [2020-08-19 06:46:56,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:56,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:56,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:56,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:56,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:56,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,029 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:57,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062195818] [2020-08-19 06:46:57,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:57,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:57,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377274198] [2020-08-19 06:46:57,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:57,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:57,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:57,031 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-19 06:46:57,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:57,293 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-19 06:46:57,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:57,294 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 06:46:57,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:57,297 INFO L225 Difference]: With dead ends: 285 [2020-08-19 06:46:57,297 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 06:46:57,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:57,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 06:46:57,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-19 06:46:57,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 06:46:57,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-19 06:46:57,327 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-19 06:46:57,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,328 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-19 06:46:57,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:57,328 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-19 06:46:57,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 06:46:57,331 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,331 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:57,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-19 06:46:57,331 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:57,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:57,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-19 06:46:57,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:57,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434854194] [2020-08-19 06:46:57,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:57,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:57,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:57,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:57,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:57,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:57,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,429 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-19 06:46:57,429 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434854194] [2020-08-19 06:46:57,429 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:57,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:46:57,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920265864] [2020-08-19 06:46:57,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:57,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:57,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:57,431 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-19 06:46:57,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:57,486 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-19 06:46:57,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:57,487 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-19 06:46:57,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:57,489 INFO L225 Difference]: With dead ends: 271 [2020-08-19 06:46:57,490 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 06:46:57,490 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 06:46:57,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-19 06:46:57,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 06:46:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-19 06:46:57,521 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-19 06:46:57,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,521 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-19 06:46:57,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-19 06:46:57,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 06:46:57,523 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,524 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:57,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-19 06:46:57,524 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:57,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:57,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-19 06:46:57,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:57,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524444241] [2020-08-19 06:46:57,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:57,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:57,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:57,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,824 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:57,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524444241] [2020-08-19 06:46:57,825 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:57,825 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:57,825 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970524161] [2020-08-19 06:46:57,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:57,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:57,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:57,827 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-19 06:46:58,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:58,050 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-19 06:46:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:58,051 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-19 06:46:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:58,053 INFO L225 Difference]: With dead ends: 284 [2020-08-19 06:46:58,053 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 06:46:58,055 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:58,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 06:46:58,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-19 06:46:58,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-19 06:46:58,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-19 06:46:58,093 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-19 06:46:58,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:58,093 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-19 06:46:58,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:58,093 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-19 06:46:58,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 06:46:58,095 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:58,096 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:58,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-19 06:46:58,096 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:58,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:58,096 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-19 06:46:58,097 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:58,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154240358] [2020-08-19 06:46:58,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:58,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:58,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,208 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:58,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:58,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,306 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:58,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154240358] [2020-08-19 06:46:58,306 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:58,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:46:58,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99070115] [2020-08-19 06:46:58,307 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:58,307 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:58,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:58,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:58,308 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-19 06:46:58,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:58,465 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-19 06:46:58,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:58,466 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-19 06:46:58,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:58,468 INFO L225 Difference]: With dead ends: 303 [2020-08-19 06:46:58,468 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 06:46:58,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 06:46:58,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-19 06:46:58,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-19 06:46:58,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-19 06:46:58,504 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-19 06:46:58,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:58,504 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-19 06:46:58,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:58,504 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-19 06:46:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 06:46:58,506 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:58,506 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:58,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-19 06:46:58,507 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:58,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:58,507 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-19 06:46:58,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:58,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541651779] [2020-08-19 06:46:58,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:58,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:58,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 06:46:58,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:46:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:58,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,648 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 06:46:58,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541651779] [2020-08-19 06:46:58,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:58,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:58,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66176610] [2020-08-19 06:46:58,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:58,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:58,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:58,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:58,650 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-19 06:46:58,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:58,766 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-19 06:46:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:46:58,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-19 06:46:58,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:58,768 INFO L225 Difference]: With dead ends: 409 [2020-08-19 06:46:58,769 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 06:46:58,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:58,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 06:46:58,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-19 06:46:58,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:46:58,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 06:46:58,793 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-19 06:46:58,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:58,793 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 06:46:58,793 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:58,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 06:46:58,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 06:46:58,795 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:58,795 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:58,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-19 06:46:58,795 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:58,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:58,796 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-19 06:46:58,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:58,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855171301] [2020-08-19 06:46:58,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:58,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:58,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:58,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,997 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-19 06:46:58,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855171301] [2020-08-19 06:46:58,998 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:58,998 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:46:58,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820124535] [2020-08-19 06:46:58,999 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:58,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:58,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:58,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:58,999 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 8 states. [2020-08-19 06:46:59,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:59,122 INFO L93 Difference]: Finished difference Result 158 states and 221 transitions. [2020-08-19 06:46:59,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:46:59,123 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 131 [2020-08-19 06:46:59,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:59,124 INFO L225 Difference]: With dead ends: 158 [2020-08-19 06:46:59,125 INFO L226 Difference]: Without dead ends: 143 [2020-08-19 06:46:59,125 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 [2020-08-19 06:46:59,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-08-19 06:46:59,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2020-08-19 06:46:59,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:46:59,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 06:46:59,146 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 131 [2020-08-19 06:46:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:59,147 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 06:46:59,147 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:59,147 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 06:46:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 06:46:59,148 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:59,148 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] [2020-08-19 06:46:59,148 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-19 06:46:59,149 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:59,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:59,149 INFO L82 PathProgramCache]: Analyzing trace with hash 757405757, now seen corresponding path program 1 times [2020-08-19 06:46:59,149 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:59,149 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499411688] [2020-08-19 06:46:59,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:59,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:59,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:59,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:59,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:59,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,335 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-19 06:46:59,336 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499411688] [2020-08-19 06:46:59,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:59,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:59,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241873188] [2020-08-19 06:46:59,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:59,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:59,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:59,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:59,340 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-19 06:46:59,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:59,475 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 06:46:59,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:59,475 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 06:46:59,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:59,477 INFO L225 Difference]: With dead ends: 176 [2020-08-19 06:46:59,477 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 06:46:59,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:59,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 06:46:59,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 160. [2020-08-19 06:46:59,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-08-19 06:46:59,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 229 transitions. [2020-08-19 06:46:59,507 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 229 transitions. Word has length 131 [2020-08-19 06:46:59,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:59,508 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 229 transitions. [2020-08-19 06:46:59,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:59,508 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 229 transitions. [2020-08-19 06:46:59,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 06:46:59,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:59,510 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] [2020-08-19 06:46:59,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-19 06:46:59,510 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash -522457921, now seen corresponding path program 1 times [2020-08-19 06:46:59,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:59,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998674039] [2020-08-19 06:46:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:59,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,585 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:59,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:59,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:59,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:59,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:59,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,715 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 851 trivial. 0 not checked. [2020-08-19 06:46:59,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998674039] [2020-08-19 06:46:59,716 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:59,716 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:59,716 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582161582] [2020-08-19 06:46:59,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:59,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:59,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:59,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:59,718 INFO L87 Difference]: Start difference. First operand 160 states and 229 transitions. Second operand 9 states. [2020-08-19 06:46:59,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:59,902 INFO L93 Difference]: Finished difference Result 170 states and 238 transitions. [2020-08-19 06:46:59,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:46:59,904 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 06:46:59,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:59,905 INFO L225 Difference]: With dead ends: 170 [2020-08-19 06:46:59,905 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 06:46:59,906 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 [2020-08-19 06:46:59,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 06:46:59,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-19 06:46:59,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:46:59,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-19 06:46:59,925 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 131 [2020-08-19 06:46:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:59,928 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-19 06:46:59,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-19 06:46:59,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:46:59,930 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:59,930 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:59,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-19 06:46:59,930 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:59,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:59,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1688456428, now seen corresponding path program 1 times [2020-08-19 06:46:59,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:59,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981133028] [2020-08-19 06:46:59,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:59,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,030 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:47:00,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:47:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:47:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:47:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 06:47:00,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981133028] [2020-08-19 06:47:00,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:00,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:47:00,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871810255] [2020-08-19 06:47:00,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:47:00,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:00,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:47:00,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:47:00,117 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 8 states. [2020-08-19 06:47:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:00,211 INFO L93 Difference]: Finished difference Result 173 states and 216 transitions. [2020-08-19 06:47:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:47:00,213 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-08-19 06:47:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:00,214 INFO L225 Difference]: With dead ends: 173 [2020-08-19 06:47:00,214 INFO L226 Difference]: Without dead ends: 163 [2020-08-19 06:47:00,217 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 [2020-08-19 06:47:00,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-19 06:47:00,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-19 06:47:00,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 06:47:00,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 200 transitions. [2020-08-19 06:47:00,235 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 200 transitions. Word has length 135 [2020-08-19 06:47:00,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:00,236 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 200 transitions. [2020-08-19 06:47:00,236 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:47:00,236 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 200 transitions. [2020-08-19 06:47:00,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:47:00,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:00,237 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:00,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-19 06:47:00,238 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:00,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:00,238 INFO L82 PathProgramCache]: Analyzing trace with hash 408592750, now seen corresponding path program 1 times [2020-08-19 06:47:00,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:00,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741460945] [2020-08-19 06:47:00,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:00,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:00,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:00,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:47:00,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:47:00,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:47:00,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:47:00,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,513 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 06:47:00,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741460945] [2020-08-19 06:47:00,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:00,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:47:00,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252131519] [2020-08-19 06:47:00,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:47:00,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:00,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:47:00,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:47:00,515 INFO L87 Difference]: Start difference. First operand 157 states and 200 transitions. Second operand 9 states. [2020-08-19 06:47:00,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:00,651 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-08-19 06:47:00,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:47:00,652 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 135 [2020-08-19 06:47:00,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:00,652 INFO L225 Difference]: With dead ends: 157 [2020-08-19 06:47:00,652 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:47:00,654 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 [2020-08-19 06:47:00,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:47:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:47:00,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:47:00,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:47:00,657 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-19 06:47:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:00,657 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:47:00,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:47:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:47:00,657 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:47:00,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-19 06:47:00,660 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.