/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.2 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-18 23:29:16,540 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 23:29:16,543 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 23:29:16,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 23:29:16,569 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 23:29:16,570 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 23:29:16,571 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 23:29:16,573 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 23:29:16,575 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 23:29:16,576 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 23:29:16,576 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 23:29:16,578 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 23:29:16,578 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 23:29:16,579 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 23:29:16,580 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 23:29:16,581 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 23:29:16,582 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 23:29:16,583 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 23:29:16,586 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 23:29:16,589 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 23:29:16,594 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 23:29:16,596 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 23:29:16,597 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 23:29:16,598 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 23:29:16,601 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 23:29:16,602 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 23:29:16,604 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 23:29:16,605 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 23:29:16,606 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 23:29:16,608 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 23:29:16,609 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 23:29:16,609 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 23:29:16,610 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 23:29:16,611 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 23:29:16,612 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 23:29:16,612 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 23:29:16,613 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 23:29:16,613 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 23:29:16,613 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 23:29:16,623 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 23:29:16,624 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 23:29:16,625 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-18 23:29:16,670 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 23:29:16,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 23:29:16,672 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 23:29:16,672 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 23:29:16,673 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 23:29:16,673 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 23:29:16,673 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 23:29:16,673 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 23:29:16,673 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 23:29:16,674 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 23:29:16,674 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 23:29:16,675 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 23:29:16,675 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 23:29:16,675 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 23:29:16,675 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 23:29:16,676 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 23:29:16,676 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 23:29:16,676 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 23:29:16,676 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 23:29:16,676 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 23:29:16,677 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 23:29:16,677 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:29:16,677 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 23:29:16,677 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 23:29:16,677 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 23:29:16,678 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 23:29:16,678 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 23:29:16,678 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 23:29:16,678 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 23:29:16,678 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.2; [2020-08-18 23:29:16,992 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 23:29:17,008 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 23:29:17,011 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 23:29:17,013 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 23:29:17,013 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 23:29:17,014 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 23:29:17,071 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13309f9dc/8a8bc91ed67749489c4751aae3e2c107/FLAGbe1cca388 [2020-08-18 23:29:17,583 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 23:29:17,584 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-18 23:29:17,596 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13309f9dc/8a8bc91ed67749489c4751aae3e2c107/FLAGbe1cca388 [2020-08-18 23:29:17,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/13309f9dc/8a8bc91ed67749489c4751aae3e2c107 [2020-08-18 23:29:17,901 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 23:29:17,903 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 23:29:17,904 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:17,904 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 23:29:17,908 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 23:29:17,909 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:17" (1/1) ... [2020-08-18 23:29:17,912 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 18.08 11:29:17, skipping insertion in model container [2020-08-18 23:29:17,912 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 11:29:17" (1/1) ... [2020-08-18 23:29:17,920 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 23:29:17,947 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 23:29:18,188 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:18,192 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 23:29:18,237 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 23:29:18,351 INFO L208 MainTranslator]: Completed translation [2020-08-18 23:29:18,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18 WrapperNode [2020-08-18 23:29:18,353 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 23:29:18,355 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 23:29:18,355 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 23:29:18,355 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 23:29:18,369 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,369 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,377 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,377 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,387 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,395 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,397 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... [2020-08-18 23:29:18,401 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 23:29:18,402 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 23:29:18,402 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 23:29:18,402 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 23:29:18,403 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 23:29:18,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 23:29:18,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 23:29:18,481 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 23:29:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-18 23:29:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-18 23:29:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-18 23:29:18,482 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 23:29:18,482 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 23:29:18,483 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-18 23:29:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-18 23:29:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 23:29:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-18 23:29:18,484 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-18 23:29:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-18 23:29:18,485 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 23:29:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 23:29:18,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 23:29:18,966 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 23:29:18,967 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-18 23:29:18,971 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:18 BoogieIcfgContainer [2020-08-18 23:29:18,971 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 23:29:18,972 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 23:29:18,972 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 23:29:18,975 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 23:29:18,976 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 11:29:17" (1/3) ... [2020-08-18 23:29:18,977 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 18.08 11:29:18, skipping insertion in model container [2020-08-18 23:29:18,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 11:29:18" (2/3) ... [2020-08-18 23:29:18,977 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 18.08 11:29:18, skipping insertion in model container [2020-08-18 23:29:18,977 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 11:29:18" (3/3) ... [2020-08-18 23:29:18,979 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-18 23:29:18,990 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 23:29:18,998 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 23:29:19,012 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 23:29:19,038 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 23:29:19,038 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 23:29:19,039 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 23:29:19,039 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 23:29:19,039 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 23:29:19,039 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 23:29:19,039 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 23:29:19,040 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 23:29:19,060 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-18 23:29:19,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-18 23:29:19,070 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:19,071 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] [2020-08-18 23:29:19,071 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-18 23:29:19,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:19,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132306391] [2020-08-18 23:29:19,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:19,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-18 23:29:19,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-18 23:29:19,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:29:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:19,476 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132306391] [2020-08-18 23:29:19,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:19,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 23:29:19,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684449333] [2020-08-18 23:29:19,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:29:19,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:19,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:29:19,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:29:19,516 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-18 23:29:19,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:19,674 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-18 23:29:19,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:29:19,677 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-18 23:29:19,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:19,690 INFO L225 Difference]: With dead ends: 136 [2020-08-18 23:29:19,690 INFO L226 Difference]: Without dead ends: 76 [2020-08-18 23:29:19,695 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 [2020-08-18 23:29:19,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-18 23:29:19,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-18 23:29:19,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-18 23:29:19,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-18 23:29:19,745 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-18 23:29:19,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:19,745 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-18 23:29:19,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:29:19,746 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-18 23:29:19,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 23:29:19,749 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:19,749 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] [2020-08-18 23:29:19,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 23:29:19,750 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:19,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:19,751 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-18 23:29:19,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:19,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840042111] [2020-08-18 23:29:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:19,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:19,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:19,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,885 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-18 23:29:19,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 23:29:19,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:29:19,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:19,928 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:19,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840042111] [2020-08-18 23:29:19,929 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:19,929 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-18 23:29:19,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616364813] [2020-08-18 23:29:19,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:29:19,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:19,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:29:19,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:29:19,932 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-18 23:29:20,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:20,016 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-18 23:29:20,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:29:20,016 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-18 23:29:20,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:20,019 INFO L225 Difference]: With dead ends: 129 [2020-08-18 23:29:20,019 INFO L226 Difference]: Without dead ends: 79 [2020-08-18 23:29:20,021 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 [2020-08-18 23:29:20,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-18 23:29:20,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-18 23:29:20,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-18 23:29:20,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-18 23:29:20,039 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-18 23:29:20,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:20,053 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-18 23:29:20,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:29:20,054 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-18 23:29:20,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 23:29:20,057 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:20,057 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] [2020-08-18 23:29:20,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 23:29:20,059 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:20,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:20,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-18 23:29:20,060 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:20,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2007460412] [2020-08-18 23:29:20,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:20,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:20,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:20,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-18 23:29:20,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 23:29:20,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:29:20,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,226 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:20,226 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2007460412] [2020-08-18 23:29:20,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:20,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:29:20,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246411568] [2020-08-18 23:29:20,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:29:20,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:20,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:29:20,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:29:20,228 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-18 23:29:20,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:20,333 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-18 23:29:20,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:29:20,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-18 23:29:20,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:20,337 INFO L225 Difference]: With dead ends: 145 [2020-08-18 23:29:20,337 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 23:29:20,339 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 [2020-08-18 23:29:20,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 23:29:20,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-18 23:29:20,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-18 23:29:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-18 23:29:20,354 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-18 23:29:20,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:20,354 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-18 23:29:20,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:29:20,354 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-18 23:29:20,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-18 23:29:20,356 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:20,357 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] [2020-08-18 23:29:20,357 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 23:29:20,357 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:20,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:20,358 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-18 23:29:20,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:20,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2013487553] [2020-08-18 23:29:20,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:20,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:20,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:20,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:20,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 23:29:20,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-18 23:29:20,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 23:29:20,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,450 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:20,450 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2013487553] [2020-08-18 23:29:20,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:20,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:29:20,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761552785] [2020-08-18 23:29:20,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:29:20,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:20,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:29:20,452 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:29:20,453 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-18 23:29:20,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:20,528 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-18 23:29:20,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:29:20,529 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-18 23:29:20,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:20,531 INFO L225 Difference]: With dead ends: 156 [2020-08-18 23:29:20,531 INFO L226 Difference]: Without dead ends: 93 [2020-08-18 23:29:20,532 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 [2020-08-18 23:29:20,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-18 23:29:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-18 23:29:20,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 23:29:20,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-18 23:29:20,547 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-18 23:29:20,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:20,547 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-18 23:29:20,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:29:20,547 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-18 23:29:20,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-18 23:29:20,549 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:20,550 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] [2020-08-18 23:29:20,550 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 23:29:20,550 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:20,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:20,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-18 23:29:20,551 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:20,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011740144] [2020-08-18 23:29:20,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:20,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:20,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:20,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 23:29:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:29:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 23:29:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:20,713 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011740144] [2020-08-18 23:29:20,713 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:20,713 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 23:29:20,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689767477] [2020-08-18 23:29:20,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:29:20,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:20,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:29:20,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:29:20,724 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-18 23:29:20,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:20,856 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-18 23:29:20,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:29:20,857 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-18 23:29:20,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:20,859 INFO L225 Difference]: With dead ends: 166 [2020-08-18 23:29:20,860 INFO L226 Difference]: Without dead ends: 106 [2020-08-18 23:29:20,864 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 [2020-08-18 23:29:20,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-18 23:29:20,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-18 23:29:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-18 23:29:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-18 23:29:20,892 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-18 23:29:20,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:20,893 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-18 23:29:20,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:29:20,893 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-18 23:29:20,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 23:29:20,902 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:20,902 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] [2020-08-18 23:29:20,903 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 23:29:20,903 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:20,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:20,903 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-18 23:29:20,904 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:20,904 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339242043] [2020-08-18 23:29:20,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:20,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:20,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:20,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:20,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,051 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-18 23:29:21,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 23:29:21,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:29:21,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,078 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:21,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339242043] [2020-08-18 23:29:21,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:21,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 23:29:21,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530733522] [2020-08-18 23:29:21,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:29:21,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:21,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:29:21,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:29:21,083 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-18 23:29:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:21,208 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-18 23:29:21,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 23:29:21,210 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-18 23:29:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:21,213 INFO L225 Difference]: With dead ends: 176 [2020-08-18 23:29:21,213 INFO L226 Difference]: Without dead ends: 110 [2020-08-18 23:29:21,214 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 [2020-08-18 23:29:21,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-18 23:29:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-18 23:29:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 23:29:21,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-18 23:29:21,241 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-18 23:29:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:21,241 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-18 23:29:21,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:29:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-18 23:29:21,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 23:29:21,244 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:21,244 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] [2020-08-18 23:29:21,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 23:29:21,245 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:21,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:21,245 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-18 23:29:21,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:21,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [950022568] [2020-08-18 23:29:21,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:21,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:21,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,307 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:21,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:21,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-18 23:29:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:29:21,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:29:21,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:21,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [950022568] [2020-08-18 23:29:21,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:21,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:29:21,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877850004] [2020-08-18 23:29:21,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:29:21,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:29:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:29:21,423 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-18 23:29:21,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:21,547 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-18 23:29:21,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:29:21,548 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-18 23:29:21,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:21,550 INFO L225 Difference]: With dead ends: 178 [2020-08-18 23:29:21,550 INFO L226 Difference]: Without dead ends: 115 [2020-08-18 23:29:21,551 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 [2020-08-18 23:29:21,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-18 23:29:21,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-18 23:29:21,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-18 23:29:21,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-18 23:29:21,564 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-18 23:29:21,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:21,564 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-18 23:29:21,564 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:29:21,565 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-18 23:29:21,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-18 23:29:21,565 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:21,566 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] [2020-08-18 23:29:21,566 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 23:29:21,566 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:21,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:21,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-18 23:29:21,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:21,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360347831] [2020-08-18 23:29:21,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:21,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:21,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:21,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,596 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 23:29:21,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,664 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-18 23:29:21,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 23:29:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:21,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360347831] [2020-08-18 23:29:21,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:21,679 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 23:29:21,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063266245] [2020-08-18 23:29:21,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 23:29:21,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:21,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 23:29:21,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-18 23:29:21,681 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-18 23:29:21,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:21,781 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-18 23:29:21,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 23:29:21,782 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-18 23:29:21,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:21,783 INFO L225 Difference]: With dead ends: 193 [2020-08-18 23:29:21,783 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 23:29:21,784 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 [2020-08-18 23:29:21,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 23:29:21,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-18 23:29:21,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 23:29:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-18 23:29:21,794 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-18 23:29:21,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:21,795 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-18 23:29:21,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 23:29:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-18 23:29:21,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-18 23:29:21,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:21,796 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] [2020-08-18 23:29:21,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 23:29:21,797 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:21,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:21,797 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-18 23:29:21,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:21,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689435823] [2020-08-18 23:29:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:21,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:21,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 23:29:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 23:29:21,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:29:21,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:21,968 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:21,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689435823] [2020-08-18 23:29:21,968 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:21,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 23:29:21,973 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024626511] [2020-08-18 23:29:21,974 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:29:21,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:21,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:29:21,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:29:21,976 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-18 23:29:22,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:22,151 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-18 23:29:22,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:29:22,152 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-18 23:29:22,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:22,153 INFO L225 Difference]: With dead ends: 190 [2020-08-18 23:29:22,153 INFO L226 Difference]: Without dead ends: 124 [2020-08-18 23:29:22,154 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 [2020-08-18 23:29:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-18 23:29:22,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-18 23:29:22,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-18 23:29:22,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-18 23:29:22,167 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-18 23:29:22,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:22,168 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-18 23:29:22,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:29:22,168 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-18 23:29:22,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 23:29:22,169 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:22,170 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] [2020-08-18 23:29:22,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 23:29:22,170 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:22,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:22,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-18 23:29:22,171 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:22,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708646928] [2020-08-18 23:29:22,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:22,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:22,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-18 23:29:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 23:29:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,281 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:29:22,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,289 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:22,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708646928] [2020-08-18 23:29:22,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:22,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-18 23:29:22,291 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585764413] [2020-08-18 23:29:22,291 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:29:22,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:22,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:29:22,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:29:22,292 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-18 23:29:22,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:22,398 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-18 23:29:22,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:29:22,399 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-18 23:29:22,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:22,401 INFO L225 Difference]: With dead ends: 210 [2020-08-18 23:29:22,401 INFO L226 Difference]: Without dead ends: 138 [2020-08-18 23:29:22,401 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 [2020-08-18 23:29:22,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-18 23:29:22,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-18 23:29:22,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 23:29:22,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-18 23:29:22,417 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-18 23:29:22,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:22,417 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-18 23:29:22,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:29:22,417 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-18 23:29:22,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 23:29:22,418 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:22,419 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] [2020-08-18 23:29:22,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 23:29:22,419 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:22,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:22,420 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-18 23:29:22,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:22,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875162629] [2020-08-18 23:29:22,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:22,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-18 23:29:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:29:22,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 23:29:22,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,602 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:22,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875162629] [2020-08-18 23:29:22,603 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:22,603 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:29:22,604 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786938723] [2020-08-18 23:29:22,604 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:29:22,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:22,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:29:22,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:29:22,606 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-18 23:29:22,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:22,766 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-18 23:29:22,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:29:22,767 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-18 23:29:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:22,768 INFO L225 Difference]: With dead ends: 202 [2020-08-18 23:29:22,769 INFO L226 Difference]: Without dead ends: 133 [2020-08-18 23:29:22,769 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 [2020-08-18 23:29:22,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-18 23:29:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-18 23:29:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-18 23:29:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-18 23:29:22,780 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-18 23:29:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:22,781 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-18 23:29:22,781 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:29:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-18 23:29:22,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-18 23:29:22,782 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:22,782 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] [2020-08-18 23:29:22,783 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 23:29:22,783 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:22,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:22,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-18 23:29:22,784 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:22,784 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528500664] [2020-08-18 23:29:22,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:22,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:22,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:22,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 23:29:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-18 23:29:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 23:29:22,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:22,937 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:22,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528500664] [2020-08-18 23:29:22,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:22,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:29:22,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688125611] [2020-08-18 23:29:22,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:29:22,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:22,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:29:22,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:29:22,939 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-18 23:29:23,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:23,054 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-18 23:29:23,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:29:23,054 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-18 23:29:23,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:23,056 INFO L225 Difference]: With dead ends: 227 [2020-08-18 23:29:23,056 INFO L226 Difference]: Without dead ends: 152 [2020-08-18 23:29:23,057 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 [2020-08-18 23:29:23,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-18 23:29:23,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-18 23:29:23,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 23:29:23,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-18 23:29:23,067 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-18 23:29:23,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:23,068 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-18 23:29:23,068 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:29:23,068 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-18 23:29:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-18 23:29:23,069 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:23,069 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] [2020-08-18 23:29:23,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 23:29:23,070 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:23,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:23,070 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-18 23:29:23,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:23,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1851427605] [2020-08-18 23:29:23,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:23,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,257 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 23:29:23,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 23:29:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 23:29:23,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,275 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:23,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1851427605] [2020-08-18 23:29:23,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:23,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:29:23,276 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594559377] [2020-08-18 23:29:23,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:29:23,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:23,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:29:23,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:29:23,278 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-18 23:29:23,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:23,522 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-18 23:29:23,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:29:23,523 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-18 23:29:23,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:23,525 INFO L225 Difference]: With dead ends: 214 [2020-08-18 23:29:23,525 INFO L226 Difference]: Without dead ends: 142 [2020-08-18 23:29:23,526 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 [2020-08-18 23:29:23,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-18 23:29:23,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-18 23:29:23,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-18 23:29:23,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-18 23:29:23,539 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-18 23:29:23,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:23,540 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-18 23:29:23,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:29:23,540 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-18 23:29:23,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 23:29:23,541 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:23,541 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] [2020-08-18 23:29:23,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 23:29:23,542 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:23,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:23,542 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-18 23:29:23,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:23,543 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952537509] [2020-08-18 23:29:23,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:23,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:23,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-18 23:29:23,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 23:29:23,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:29:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,673 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:23,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952537509] [2020-08-18 23:29:23,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:23,675 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:29:23,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661877031] [2020-08-18 23:29:23,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:29:23,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:23,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:29:23,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:29:23,677 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-18 23:29:23,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:23,850 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-18 23:29:23,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 23:29:23,851 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-18 23:29:23,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:23,853 INFO L225 Difference]: With dead ends: 244 [2020-08-18 23:29:23,853 INFO L226 Difference]: Without dead ends: 166 [2020-08-18 23:29:23,854 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 [2020-08-18 23:29:23,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-18 23:29:23,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-18 23:29:23,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 23:29:23,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-18 23:29:23,865 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-18 23:29:23,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:23,866 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-18 23:29:23,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:29:23,866 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-18 23:29:23,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 23:29:23,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:23,867 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] [2020-08-18 23:29:23,867 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 23:29:23,868 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:23,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:23,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-18 23:29:23,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:23,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058431409] [2020-08-18 23:29:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:23,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:23,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:23,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:23,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:23,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-18 23:29:24,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:29:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 23:29:24,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,069 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:24,069 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058431409] [2020-08-18 23:29:24,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:24,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:29:24,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11745055] [2020-08-18 23:29:24,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:29:24,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:24,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:29:24,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:29:24,071 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-18 23:29:24,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:24,311 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-18 23:29:24,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 23:29:24,312 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-18 23:29:24,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:24,313 INFO L225 Difference]: With dead ends: 226 [2020-08-18 23:29:24,314 INFO L226 Difference]: Without dead ends: 151 [2020-08-18 23:29:24,314 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 [2020-08-18 23:29:24,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-18 23:29:24,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-18 23:29:24,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 23:29:24,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-18 23:29:24,325 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-18 23:29:24,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:24,326 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-18 23:29:24,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:29:24,326 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-18 23:29:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-18 23:29:24,327 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:24,327 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] [2020-08-18 23:29:24,327 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 23:29:24,328 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:24,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:24,328 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-18 23:29:24,328 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:24,329 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900074772] [2020-08-18 23:29:24,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:24,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:24,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 23:29:24,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,476 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-18 23:29:24,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 23:29:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,491 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:24,491 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900074772] [2020-08-18 23:29:24,494 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:24,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:29:24,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228068182] [2020-08-18 23:29:24,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:29:24,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:24,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:29:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:29:24,496 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-18 23:29:24,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:24,643 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-18 23:29:24,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 23:29:24,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-18 23:29:24,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:24,645 INFO L225 Difference]: With dead ends: 261 [2020-08-18 23:29:24,645 INFO L226 Difference]: Without dead ends: 180 [2020-08-18 23:29:24,646 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:29:24,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-18 23:29:24,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-18 23:29:24,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-18 23:29:24,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-18 23:29:24,659 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-18 23:29:24,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:24,660 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-18 23:29:24,660 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:29:24,660 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-18 23:29:24,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-18 23:29:24,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:24,663 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] [2020-08-18 23:29:24,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 23:29:24,663 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:24,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:24,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-18 23:29:24,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:24,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1947635126] [2020-08-18 23:29:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:24,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:24,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:24,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 23:29:24,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 23:29:24,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 23:29:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:24,921 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:24,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1947635126] [2020-08-18 23:29:24,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:24,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:29:24,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31735199] [2020-08-18 23:29:24,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:29:24,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:24,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:29:24,924 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:29:24,924 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-18 23:29:25,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:25,195 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-18 23:29:25,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:29:25,197 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-18 23:29:25,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:25,199 INFO L225 Difference]: With dead ends: 238 [2020-08-18 23:29:25,199 INFO L226 Difference]: Without dead ends: 160 [2020-08-18 23:29:25,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:29:25,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-18 23:29:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-18 23:29:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-18 23:29:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-18 23:29:25,217 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-18 23:29:25,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:25,217 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-18 23:29:25,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:29:25,218 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-18 23:29:25,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 23:29:25,219 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:25,220 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] [2020-08-18 23:29:25,220 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 23:29:25,220 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:25,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:25,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-18 23:29:25,221 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:25,221 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226944220] [2020-08-18 23:29:25,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:25,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:25,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-18 23:29:25,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 23:29:25,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:29:25,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,417 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:25,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226944220] [2020-08-18 23:29:25,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:25,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:29:25,418 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731763901] [2020-08-18 23:29:25,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:29:25,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:25,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:29:25,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:29:25,423 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-18 23:29:25,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:25,579 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-18 23:29:25,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:29:25,582 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-18 23:29:25,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:25,584 INFO L225 Difference]: With dead ends: 278 [2020-08-18 23:29:25,584 INFO L226 Difference]: Without dead ends: 194 [2020-08-18 23:29:25,586 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 [2020-08-18 23:29:25,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-18 23:29:25,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-18 23:29:25,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-18 23:29:25,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-18 23:29:25,601 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-18 23:29:25,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:25,602 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-18 23:29:25,602 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:29:25,602 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-18 23:29:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 23:29:25,604 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:25,604 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] [2020-08-18 23:29:25,604 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 23:29:25,604 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-18 23:29:25,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:25,607 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622386580] [2020-08-18 23:29:25,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:25,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:25,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:25,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-18 23:29:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:29:25,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 23:29:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:25,906 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:25,906 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622386580] [2020-08-18 23:29:25,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:25,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:29:25,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164234181] [2020-08-18 23:29:25,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:29:25,908 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:25,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:29:25,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:29:25,908 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-18 23:29:26,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:26,176 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-18 23:29:26,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:29:26,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-18 23:29:26,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:26,179 INFO L225 Difference]: With dead ends: 250 [2020-08-18 23:29:26,179 INFO L226 Difference]: Without dead ends: 169 [2020-08-18 23:29:26,180 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 [2020-08-18 23:29:26,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-18 23:29:26,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-18 23:29:26,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-18 23:29:26,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-18 23:29:26,191 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-18 23:29:26,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:26,191 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-18 23:29:26,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:29:26,192 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-18 23:29:26,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-18 23:29:26,193 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:26,193 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] [2020-08-18 23:29:26,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 23:29:26,193 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:26,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:26,194 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-18 23:29:26,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:26,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [77367117] [2020-08-18 23:29:26,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:26,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:26,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:26,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,360 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 23:29:26,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-18 23:29:26,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 23:29:26,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:26,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [77367117] [2020-08-18 23:29:26,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:26,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:29:26,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734695571] [2020-08-18 23:29:26,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:29:26,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:26,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:29:26,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:29:26,380 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-18 23:29:26,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:26,530 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-18 23:29:26,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 23:29:26,532 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-18 23:29:26,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:26,534 INFO L225 Difference]: With dead ends: 295 [2020-08-18 23:29:26,534 INFO L226 Difference]: Without dead ends: 208 [2020-08-18 23:29:26,535 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 [2020-08-18 23:29:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-18 23:29:26,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-18 23:29:26,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 23:29:26,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-18 23:29:26,551 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-18 23:29:26,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:26,551 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-18 23:29:26,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:29:26,552 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-18 23:29:26,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-18 23:29:26,553 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:26,553 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] [2020-08-18 23:29:26,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 23:29:26,553 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:26,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:26,554 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-18 23:29:26,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:26,554 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082412582] [2020-08-18 23:29:26,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:26,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:26,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,579 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 23:29:26,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 23:29:26,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,842 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 23:29:26,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:26,855 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:26,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082412582] [2020-08-18 23:29:26,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:26,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:29:26,856 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588557493] [2020-08-18 23:29:26,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:29:26,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:26,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:29:26,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:29:26,858 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-18 23:29:27,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:27,217 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-18 23:29:27,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:29:27,217 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-18 23:29:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:27,219 INFO L225 Difference]: With dead ends: 262 [2020-08-18 23:29:27,219 INFO L226 Difference]: Without dead ends: 178 [2020-08-18 23:29:27,220 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 [2020-08-18 23:29:27,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-18 23:29:27,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-18 23:29:27,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-18 23:29:27,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-18 23:29:27,235 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-18 23:29:27,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:27,235 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-18 23:29:27,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:29:27,236 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-18 23:29:27,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 23:29:27,237 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:27,237 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] [2020-08-18 23:29:27,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 23:29:27,238 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:27,239 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-18 23:29:27,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:27,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017549929] [2020-08-18 23:29:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,452 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-18 23:29:27,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 23:29:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:29:27,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,477 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:27,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017549929] [2020-08-18 23:29:27,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:27,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 23:29:27,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163604346] [2020-08-18 23:29:27,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 23:29:27,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:27,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 23:29:27,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:29:27,480 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-18 23:29:27,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:27,690 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-18 23:29:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:29:27,692 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-18 23:29:27,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:27,694 INFO L225 Difference]: With dead ends: 312 [2020-08-18 23:29:27,694 INFO L226 Difference]: Without dead ends: 222 [2020-08-18 23:29:27,695 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 [2020-08-18 23:29:27,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-18 23:29:27,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-18 23:29:27,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 23:29:27,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-18 23:29:27,709 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-18 23:29:27,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:27,710 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-18 23:29:27,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 23:29:27,710 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-18 23:29:27,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 23:29:27,711 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:27,712 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] [2020-08-18 23:29:27,712 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 23:29:27,712 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-18 23:29:27,713 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:27,714 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192941461] [2020-08-18 23:29:27,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:27,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:27,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:27,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:27,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-18 23:29:28,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:29:28,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:29:28,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,075 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:28,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192941461] [2020-08-18 23:29:28,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:28,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 23:29:28,084 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506660661] [2020-08-18 23:29:28,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 23:29:28,088 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:28,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 23:29:28,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:29:28,091 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-18 23:29:28,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:28,507 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-18 23:29:28,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 23:29:28,508 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-18 23:29:28,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:28,510 INFO L225 Difference]: With dead ends: 274 [2020-08-18 23:29:28,510 INFO L226 Difference]: Without dead ends: 187 [2020-08-18 23:29:28,511 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 [2020-08-18 23:29:28,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-18 23:29:28,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-18 23:29:28,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-18 23:29:28,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-18 23:29:28,525 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-18 23:29:28,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:28,525 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-18 23:29:28,525 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 23:29:28,525 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-18 23:29:28,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-18 23:29:28,526 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:28,527 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] [2020-08-18 23:29:28,527 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 23:29:28,527 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:28,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:28,527 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-18 23:29:28,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:28,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034129898] [2020-08-18 23:29:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:28,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 23:29:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-18 23:29:28,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,767 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 23:29:28,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:28,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034129898] [2020-08-18 23:29:28,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:28,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 23:29:28,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029966348] [2020-08-18 23:29:28,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 23:29:28,788 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:28,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 23:29:28,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:29:28,789 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-18 23:29:28,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:28,968 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-18 23:29:28,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 23:29:28,969 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-18 23:29:28,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:28,971 INFO L225 Difference]: With dead ends: 329 [2020-08-18 23:29:28,971 INFO L226 Difference]: Without dead ends: 236 [2020-08-18 23:29:28,972 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 [2020-08-18 23:29:28,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-18 23:29:28,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-18 23:29:28,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-18 23:29:28,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-18 23:29:28,988 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-18 23:29:28,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:28,988 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-18 23:29:28,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 23:29:28,988 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-18 23:29:28,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-18 23:29:28,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:28,990 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] [2020-08-18 23:29:28,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 23:29:28,992 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:28,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:28,993 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-18 23:29:28,993 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:28,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671927796] [2020-08-18 23:29:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:29,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:29,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:29,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 23:29:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 23:29:29,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 23:29:29,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,376 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:29,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671927796] [2020-08-18 23:29:29,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:29,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 23:29:29,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245016438] [2020-08-18 23:29:29,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 23:29:29,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:29,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 23:29:29,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:29:29,379 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-18 23:29:29,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:29,910 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-18 23:29:29,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:29:29,911 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-18 23:29:29,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:29,914 INFO L225 Difference]: With dead ends: 286 [2020-08-18 23:29:29,914 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 23:29:29,916 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 [2020-08-18 23:29:29,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 23:29:29,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-18 23:29:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-18 23:29:29,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-18 23:29:29,938 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-18 23:29:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:29,938 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-18 23:29:29,938 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 23:29:29,938 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-18 23:29:29,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 23:29:29,939 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:29,940 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] [2020-08-18 23:29:29,940 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 23:29:29,940 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:29,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:29,941 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-18 23:29:29,941 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:29,941 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [156553139] [2020-08-18 23:29:29,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:29,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:29,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:29,995 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:29,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:30,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-18 23:29:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 23:29:30,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:29:30,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:30,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [156553139] [2020-08-18 23:29:30,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:30,228 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 23:29:30,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883385414] [2020-08-18 23:29:30,230 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 23:29:30,230 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:30,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 23:29:30,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:29:30,231 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-18 23:29:30,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:30,454 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-18 23:29:30,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 23:29:30,454 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-18 23:29:30,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:30,456 INFO L225 Difference]: With dead ends: 346 [2020-08-18 23:29:30,457 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 23:29:30,457 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 [2020-08-18 23:29:30,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 23:29:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-18 23:29:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 23:29:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-18 23:29:30,474 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-18 23:29:30,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:30,474 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-18 23:29:30,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 23:29:30,474 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-18 23:29:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 23:29:30,475 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:30,475 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] [2020-08-18 23:29:30,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 23:29:30,476 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:30,476 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-18 23:29:30,476 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:30,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860231924] [2020-08-18 23:29:30,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:30,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:30,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:30,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:30,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 23:29:30,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:29:30,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,547 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 23:29:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,561 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 23:29:30,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860231924] [2020-08-18 23:29:30,562 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:30,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-18 23:29:30,562 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098859553] [2020-08-18 23:29:30,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-18 23:29:30,563 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:30,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-18 23:29:30,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-18 23:29:30,563 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-18 23:29:30,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:30,578 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-18 23:29:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-18 23:29:30,580 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-18 23:29:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:30,581 INFO L225 Difference]: With dead ends: 160 [2020-08-18 23:29:30,582 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 23:29:30,582 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 [2020-08-18 23:29:30,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 23:29:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 23:29:30,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 23:29:30,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-18 23:29:30,598 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-18 23:29:30,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:30,598 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-18 23:29:30,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-18 23:29:30,598 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-18 23:29:30,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 23:29:30,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:30,600 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] [2020-08-18 23:29:30,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 23:29:30,601 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:30,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:30,601 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-18 23:29:30,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:30,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1408868760] [2020-08-18 23:29:30,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:30,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:30,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 23:29:30,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:29:30,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 23:29:30,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,711 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-18 23:29:30,711 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1408868760] [2020-08-18 23:29:30,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:30,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 23:29:30,712 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587106060] [2020-08-18 23:29:30,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 23:29:30,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:30,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 23:29:30,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 23:29:30,713 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-18 23:29:30,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:30,740 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-18 23:29:30,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 23:29:30,741 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-18 23:29:30,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:30,742 INFO L225 Difference]: With dead ends: 161 [2020-08-18 23:29:30,742 INFO L226 Difference]: Without dead ends: 149 [2020-08-18 23:29:30,743 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 [2020-08-18 23:29:30,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-18 23:29:30,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-18 23:29:30,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-18 23:29:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-18 23:29:30,755 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-18 23:29:30,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:30,755 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-18 23:29:30,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 23:29:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-18 23:29:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 23:29:30,757 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:30,757 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] [2020-08-18 23:29:30,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 23:29:30,758 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-18 23:29:30,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:30,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1339684534] [2020-08-18 23:29:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:30,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:30,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:30,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-18 23:29:31,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:29:31,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 23:29:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,110 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:31,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1339684534] [2020-08-18 23:29:31,111 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:31,111 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:29:31,111 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281426946] [2020-08-18 23:29:31,112 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:29:31,112 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:31,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:29:31,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:29:31,113 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-18 23:29:31,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:31,699 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-18 23:29:31,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 23:29:31,700 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-18 23:29:31,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:31,704 INFO L225 Difference]: With dead ends: 298 [2020-08-18 23:29:31,704 INFO L226 Difference]: Without dead ends: 205 [2020-08-18 23:29:31,705 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 [2020-08-18 23:29:31,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-18 23:29:31,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-18 23:29:31,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-18 23:29:31,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-18 23:29:31,729 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-18 23:29:31,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:31,730 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-18 23:29:31,730 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:29:31,730 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-18 23:29:31,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-18 23:29:31,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:31,732 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] [2020-08-18 23:29:31,732 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 23:29:31,733 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:31,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:31,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-18 23:29:31,733 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:31,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144239617] [2020-08-18 23:29:31,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:31,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:31,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:31,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:31,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,092 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 23:29:32,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-18 23:29:32,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,096 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 23:29:32,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:32,113 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144239617] [2020-08-18 23:29:32,113 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:32,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 23:29:32,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175694304] [2020-08-18 23:29:32,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 23:29:32,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:32,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 23:29:32,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:29:32,116 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-18 23:29:32,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:32,371 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-18 23:29:32,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 23:29:32,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-18 23:29:32,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:32,375 INFO L225 Difference]: With dead ends: 363 [2020-08-18 23:29:32,376 INFO L226 Difference]: Without dead ends: 264 [2020-08-18 23:29:32,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:29:32,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-18 23:29:32,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-18 23:29:32,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-18 23:29:32,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-18 23:29:32,397 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-18 23:29:32,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:32,398 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-18 23:29:32,398 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 23:29:32,398 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-18 23:29:32,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-18 23:29:32,399 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:32,400 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] [2020-08-18 23:29:32,400 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 23:29:32,400 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:32,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:32,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-18 23:29:32,401 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:32,401 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449068324] [2020-08-18 23:29:32,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:32,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:32,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:32,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:32,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 23:29:32,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 23:29:32,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 23:29:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:32,854 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:32,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449068324] [2020-08-18 23:29:32,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:32,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 23:29:32,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222721341] [2020-08-18 23:29:32,855 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 23:29:32,855 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:32,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 23:29:32,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:29:32,856 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-18 23:29:33,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:33,655 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-18 23:29:33,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 23:29:33,656 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-18 23:29:33,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:33,664 INFO L225 Difference]: With dead ends: 310 [2020-08-18 23:29:33,664 INFO L226 Difference]: Without dead ends: 214 [2020-08-18 23:29:33,666 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 [2020-08-18 23:29:33,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-18 23:29:33,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-18 23:29:33,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-18 23:29:33,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-18 23:29:33,690 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-18 23:29:33,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:33,690 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-18 23:29:33,691 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 23:29:33,691 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-18 23:29:33,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-18 23:29:33,693 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:33,694 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] [2020-08-18 23:29:33,694 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 23:29:33,695 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:33,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:33,695 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-18 23:29:33,695 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:33,696 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489320495] [2020-08-18 23:29:33,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:33,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:33,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:33,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:33,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:33,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:33,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:33,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,131 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-18 23:29:34,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 23:29:34,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 23:29:34,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:34,178 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489320495] [2020-08-18 23:29:34,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:34,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 23:29:34,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762675735] [2020-08-18 23:29:34,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 23:29:34,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:34,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 23:29:34,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:29:34,181 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-18 23:29:34,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:34,468 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-18 23:29:34,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 23:29:34,469 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-18 23:29:34,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:34,473 INFO L225 Difference]: With dead ends: 380 [2020-08-18 23:29:34,473 INFO L226 Difference]: Without dead ends: 278 [2020-08-18 23:29:34,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:29:34,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-18 23:29:34,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-18 23:29:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-18 23:29:34,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-18 23:29:34,503 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-18 23:29:34,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:34,504 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-18 23:29:34,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 23:29:34,504 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-18 23:29:34,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-18 23:29:34,507 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:34,508 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] [2020-08-18 23:29:34,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 23:29:34,508 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:34,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:34,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-18 23:29:34,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:34,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619346344] [2020-08-18 23:29:34,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:34,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:34,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:34,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:34,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-18 23:29:35,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:29:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:29:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:35,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619346344] [2020-08-18 23:29:35,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:35,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 23:29:35,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730796526] [2020-08-18 23:29:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 23:29:35,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:35,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 23:29:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:29:35,049 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-18 23:29:35,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:35,753 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-18 23:29:35,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 23:29:35,753 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-18 23:29:35,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:35,755 INFO L225 Difference]: With dead ends: 322 [2020-08-18 23:29:35,756 INFO L226 Difference]: Without dead ends: 223 [2020-08-18 23:29:35,756 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:29:35,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-18 23:29:35,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-18 23:29:35,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-18 23:29:35,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-18 23:29:35,769 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-18 23:29:35,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:35,769 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-18 23:29:35,769 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 23:29:35,769 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-18 23:29:35,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-18 23:29:35,770 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:35,771 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] [2020-08-18 23:29:35,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 23:29:35,771 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:35,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:35,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-18 23:29:35,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:35,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208660555] [2020-08-18 23:29:35,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:35,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:35,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:35,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 23:29:36,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-18 23:29:36,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 23:29:36,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,156 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:36,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208660555] [2020-08-18 23:29:36,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:36,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 23:29:36,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74088917] [2020-08-18 23:29:36,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 23:29:36,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:36,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 23:29:36,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-18 23:29:36,159 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-18 23:29:36,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:36,525 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-18 23:29:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 23:29:36,526 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-18 23:29:36,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:36,530 INFO L225 Difference]: With dead ends: 397 [2020-08-18 23:29:36,530 INFO L226 Difference]: Without dead ends: 292 [2020-08-18 23:29:36,536 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 [2020-08-18 23:29:36,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-18 23:29:36,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-18 23:29:36,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-18 23:29:36,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-18 23:29:36,561 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-18 23:29:36,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:36,562 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-18 23:29:36,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 23:29:36,562 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-18 23:29:36,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-18 23:29:36,563 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:36,564 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] [2020-08-18 23:29:36,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-18 23:29:36,564 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:36,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:36,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-18 23:29:36,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:36,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1464093478] [2020-08-18 23:29:36,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:36,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:36,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:36,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:36,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 23:29:37,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:29:37,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 23:29:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,067 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:37,067 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1464093478] [2020-08-18 23:29:37,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:37,068 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:29:37,068 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360379634] [2020-08-18 23:29:37,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:29:37,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:29:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:29:37,070 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-18 23:29:37,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:37,819 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-18 23:29:37,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:29:37,820 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-18 23:29:37,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:37,822 INFO L225 Difference]: With dead ends: 334 [2020-08-18 23:29:37,822 INFO L226 Difference]: Without dead ends: 232 [2020-08-18 23:29:37,823 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:29:37,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-18 23:29:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-18 23:29:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-18 23:29:37,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-18 23:29:37,839 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-18 23:29:37,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:37,839 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-18 23:29:37,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:29:37,840 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-18 23:29:37,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-18 23:29:37,841 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:37,841 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] [2020-08-18 23:29:37,841 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-18 23:29:37,842 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-18 23:29:37,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:37,842 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315940891] [2020-08-18 23:29:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:37,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:37,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:37,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:37,884 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-18 23:29:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 23:29:38,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 23:29:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,193 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:38,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315940891] [2020-08-18 23:29:38,193 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:38,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 23:29:38,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128366770] [2020-08-18 23:29:38,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 23:29:38,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:38,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 23:29:38,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-18 23:29:38,195 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-18 23:29:38,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:38,498 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-18 23:29:38,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 23:29:38,498 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-18 23:29:38,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:38,501 INFO L225 Difference]: With dead ends: 414 [2020-08-18 23:29:38,501 INFO L226 Difference]: Without dead ends: 306 [2020-08-18 23:29:38,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:29:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-18 23:29:38,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-18 23:29:38,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-18 23:29:38,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-18 23:29:38,528 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-18 23:29:38,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:38,528 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-18 23:29:38,528 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 23:29:38,528 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-18 23:29:38,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-18 23:29:38,532 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:38,532 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] [2020-08-18 23:29:38,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-18 23:29:38,532 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:38,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:38,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-18 23:29:38,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:38,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757637664] [2020-08-18 23:29:38,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:38,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,576 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:38,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:38,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:38,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-18 23:29:39,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 23:29:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 23:29:39,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,087 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:39,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757637664] [2020-08-18 23:29:39,088 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:39,088 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 23:29:39,089 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358240960] [2020-08-18 23:29:39,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 23:29:39,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:39,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 23:29:39,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:29:39,093 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-18 23:29:39,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:39,808 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-18 23:29:39,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 23:29:39,809 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-18 23:29:39,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:39,811 INFO L225 Difference]: With dead ends: 346 [2020-08-18 23:29:39,811 INFO L226 Difference]: Without dead ends: 241 [2020-08-18 23:29:39,812 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 [2020-08-18 23:29:39,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-18 23:29:39,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-18 23:29:39,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-18 23:29:39,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-18 23:29:39,828 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-18 23:29:39,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:39,828 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-18 23:29:39,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 23:29:39,828 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-18 23:29:39,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-18 23:29:39,830 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:39,830 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] [2020-08-18 23:29:39,830 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-18 23:29:39,830 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:39,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:39,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-18 23:29:39,831 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:39,831 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142770057] [2020-08-18 23:29:39,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:39,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,864 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:39,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:39,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:39,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 23:29:40,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-18 23:29:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:29:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,190 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:40,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142770057] [2020-08-18 23:29:40,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:40,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 23:29:40,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829416564] [2020-08-18 23:29:40,194 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 23:29:40,194 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:40,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 23:29:40,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-18 23:29:40,196 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-18 23:29:40,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:40,483 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-18 23:29:40,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 23:29:40,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-18 23:29:40,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:40,486 INFO L225 Difference]: With dead ends: 431 [2020-08-18 23:29:40,486 INFO L226 Difference]: Without dead ends: 320 [2020-08-18 23:29:40,487 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 [2020-08-18 23:29:40,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-18 23:29:40,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-18 23:29:40,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-18 23:29:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-18 23:29:40,507 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-18 23:29:40,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:40,507 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-18 23:29:40,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 23:29:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-18 23:29:40,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-18 23:29:40,510 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:40,510 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] [2020-08-18 23:29:40,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-18 23:29:40,510 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:40,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:40,511 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-18 23:29:40,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:40,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492065359] [2020-08-18 23:29:40,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:40,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:40,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:41,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 23:29:41,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:41,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 23:29:41,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:41,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 23:29:41,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:41,104 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492065359] [2020-08-18 23:29:41,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:41,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 23:29:41,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143577957] [2020-08-18 23:29:41,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 23:29:41,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:41,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 23:29:41,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:29:41,106 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-18 23:29:41,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:41,985 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-18 23:29:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 23:29:41,986 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-18 23:29:41,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:41,988 INFO L225 Difference]: With dead ends: 358 [2020-08-18 23:29:41,988 INFO L226 Difference]: Without dead ends: 250 [2020-08-18 23:29:41,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:29:41,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-18 23:29:42,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-18 23:29:42,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-18 23:29:42,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-18 23:29:42,005 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-18 23:29:42,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:42,006 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-18 23:29:42,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 23:29:42,006 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-18 23:29:42,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-18 23:29:42,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:42,007 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] [2020-08-18 23:29:42,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-18 23:29:42,008 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:42,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:42,008 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-18 23:29:42,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:42,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713076937] [2020-08-18 23:29:42,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:42,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-18 23:29:42,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-18 23:29:42,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,378 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,398 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:42,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713076937] [2020-08-18 23:29:42,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:42,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 23:29:42,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007892593] [2020-08-18 23:29:42,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 23:29:42,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:42,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 23:29:42,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-18 23:29:42,401 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-18 23:29:42,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:42,677 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-18 23:29:42,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 23:29:42,678 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-18 23:29:42,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:42,681 INFO L225 Difference]: With dead ends: 448 [2020-08-18 23:29:42,681 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 23:29:42,682 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 [2020-08-18 23:29:42,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 23:29:42,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-18 23:29:42,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-18 23:29:42,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-18 23:29:42,700 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-18 23:29:42,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:42,700 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-18 23:29:42,700 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 23:29:42,700 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-18 23:29:42,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-18 23:29:42,702 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:42,702 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] [2020-08-18 23:29:42,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-18 23:29:42,702 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:42,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:42,703 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-18 23:29:42,703 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:42,703 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795327094] [2020-08-18 23:29:42,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:42,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:42,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:42,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:42,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:43,283 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-18 23:29:43,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:43,285 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 23:29:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:43,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 23:29:43,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:43,309 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:43,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795327094] [2020-08-18 23:29:43,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:43,310 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 23:29:43,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912769936] [2020-08-18 23:29:43,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 23:29:43,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:43,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 23:29:43,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:29:43,311 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-18 23:29:44,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:44,186 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-18 23:29:44,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 23:29:44,187 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-18 23:29:44,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:44,189 INFO L225 Difference]: With dead ends: 370 [2020-08-18 23:29:44,189 INFO L226 Difference]: Without dead ends: 259 [2020-08-18 23:29:44,190 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 [2020-08-18 23:29:44,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-18 23:29:44,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-18 23:29:44,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-18 23:29:44,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-18 23:29:44,206 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-18 23:29:44,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:44,207 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-18 23:29:44,207 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 23:29:44,207 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-18 23:29:44,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-18 23:29:44,208 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:44,208 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] [2020-08-18 23:29:44,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-18 23:29:44,209 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:44,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:44,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-18 23:29:44,209 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:44,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816927709] [2020-08-18 23:29:44,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:44,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:44,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 23:29:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-18 23:29:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-18 23:29:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:44,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816927709] [2020-08-18 23:29:44,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:44,682 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 23:29:44,682 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599209929] [2020-08-18 23:29:44,682 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 23:29:44,682 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:44,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 23:29:44,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-18 23:29:44,683 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-18 23:29:45,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:45,007 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-18 23:29:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 23:29:45,009 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-18 23:29:45,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:45,011 INFO L225 Difference]: With dead ends: 465 [2020-08-18 23:29:45,012 INFO L226 Difference]: Without dead ends: 348 [2020-08-18 23:29:45,013 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 [2020-08-18 23:29:45,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-18 23:29:45,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-18 23:29:45,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-18 23:29:45,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-18 23:29:45,030 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-18 23:29:45,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:45,030 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-18 23:29:45,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 23:29:45,031 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-18 23:29:45,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-18 23:29:45,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:45,032 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] [2020-08-18 23:29:45,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-18 23:29:45,032 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:45,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:45,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-18 23:29:45,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:45,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203051886] [2020-08-18 23:29:45,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:45,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:45,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 23:29:45,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 23:29:45,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 23:29:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:45,661 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:45,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203051886] [2020-08-18 23:29:45,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:45,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 23:29:45,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067157809] [2020-08-18 23:29:45,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 23:29:45,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:45,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 23:29:45,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-18 23:29:45,663 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-18 23:29:46,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:46,823 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-18 23:29:46,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:29:46,824 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-18 23:29:46,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:46,827 INFO L225 Difference]: With dead ends: 382 [2020-08-18 23:29:46,827 INFO L226 Difference]: Without dead ends: 268 [2020-08-18 23:29:46,828 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:29:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-18 23:29:46,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-18 23:29:46,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-18 23:29:46,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-18 23:29:46,844 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-18 23:29:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:46,845 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-18 23:29:46,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 23:29:46,845 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-18 23:29:46,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-18 23:29:46,847 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:46,847 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] [2020-08-18 23:29:46,847 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-18 23:29:46,847 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:46,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:46,847 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-18 23:29:46,848 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:46,848 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26496284] [2020-08-18 23:29:46,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:46,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:46,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:46,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:46,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:46,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-18 23:29:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,266 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-18 23:29:47,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-18 23:29:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,296 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:47,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26496284] [2020-08-18 23:29:47,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:47,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 23:29:47,296 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121828971] [2020-08-18 23:29:47,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 23:29:47,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:47,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 23:29:47,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-18 23:29:47,298 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-18 23:29:47,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:47,675 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-18 23:29:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 23:29:47,679 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-18 23:29:47,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:47,681 INFO L225 Difference]: With dead ends: 482 [2020-08-18 23:29:47,682 INFO L226 Difference]: Without dead ends: 362 [2020-08-18 23:29:47,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:29:47,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-18 23:29:47,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-18 23:29:47,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-18 23:29:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-18 23:29:47,702 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-18 23:29:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:47,703 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-18 23:29:47,703 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 23:29:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-18 23:29:47,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-18 23:29:47,704 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:47,704 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] [2020-08-18 23:29:47,705 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-18 23:29:47,705 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:47,705 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-18 23:29:47,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:47,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710917461] [2020-08-18 23:29:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:47,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:47,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:47,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:47,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:47,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:48,502 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-18 23:29:48,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:48,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 23:29:48,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:48,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-18 23:29:48,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:48,542 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:48,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710917461] [2020-08-18 23:29:48,542 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:48,543 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 23:29:48,543 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721513553] [2020-08-18 23:29:48,543 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 23:29:48,543 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:48,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 23:29:48,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:29:48,544 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-18 23:29:49,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:49,796 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-18 23:29:49,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 23:29:49,796 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-18 23:29:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:49,798 INFO L225 Difference]: With dead ends: 394 [2020-08-18 23:29:49,798 INFO L226 Difference]: Without dead ends: 277 [2020-08-18 23:29:49,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:29:49,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-18 23:29:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-18 23:29:49,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-18 23:29:49,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-18 23:29:49,817 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-18 23:29:49,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:49,818 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-18 23:29:49,818 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 23:29:49,818 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-18 23:29:49,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-18 23:29:49,819 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:49,819 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] [2020-08-18 23:29:49,820 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-18 23:29:49,820 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:49,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:49,820 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-18 23:29:49,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:49,821 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558545438] [2020-08-18 23:29:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:49,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:49,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:49,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:49,855 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:49,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-18 23:29:50,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-18 23:29:50,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-18 23:29:50,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,353 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:50,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558545438] [2020-08-18 23:29:50,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:50,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 23:29:50,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145424045] [2020-08-18 23:29:50,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 23:29:50,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:50,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 23:29:50,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-18 23:29:50,355 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-18 23:29:50,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:50,754 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-18 23:29:50,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 23:29:50,755 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-18 23:29:50,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:50,758 INFO L225 Difference]: With dead ends: 499 [2020-08-18 23:29:50,758 INFO L226 Difference]: Without dead ends: 376 [2020-08-18 23:29:50,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:29:50,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-18 23:29:50,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-18 23:29:50,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-18 23:29:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-18 23:29:50,782 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-18 23:29:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:50,782 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-18 23:29:50,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 23:29:50,783 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-18 23:29:50,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-18 23:29:50,784 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:50,784 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] [2020-08-18 23:29:50,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-18 23:29:50,785 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:50,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:50,785 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-18 23:29:50,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:50,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1860513712] [2020-08-18 23:29:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:50,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:50,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:50,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:50,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:51,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-18 23:29:51,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:51,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-18 23:29:51,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:51,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:29:51,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:51,513 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:51,514 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1860513712] [2020-08-18 23:29:51,514 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:51,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 23:29:51,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589988048] [2020-08-18 23:29:51,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 23:29:51,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:51,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 23:29:51,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:29:51,516 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-18 23:29:52,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:52,861 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-18 23:29:52,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 23:29:52,862 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-18 23:29:52,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:52,869 INFO L225 Difference]: With dead ends: 406 [2020-08-18 23:29:52,869 INFO L226 Difference]: Without dead ends: 286 [2020-08-18 23:29:52,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:29:52,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-18 23:29:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-18 23:29:52,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-18 23:29:52,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-18 23:29:52,889 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-18 23:29:52,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:52,890 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-18 23:29:52,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 23:29:52,890 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-18 23:29:52,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-18 23:29:52,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:52,891 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] [2020-08-18 23:29:52,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-18 23:29:52,892 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:52,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:52,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-18 23:29:52,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:52,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418136965] [2020-08-18 23:29:52,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:52,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:52,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:52,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:52,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:52,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-18 23:29:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-18 23:29:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-18 23:29:53,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,457 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:53,457 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418136965] [2020-08-18 23:29:53,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 23:29:53,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645261843] [2020-08-18 23:29:53,458 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 23:29:53,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 23:29:53,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-18 23:29:53,459 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-18 23:29:53,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:53,782 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-18 23:29:53,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 23:29:53,785 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-18 23:29:53,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:53,788 INFO L225 Difference]: With dead ends: 516 [2020-08-18 23:29:53,788 INFO L226 Difference]: Without dead ends: 390 [2020-08-18 23:29:53,790 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 [2020-08-18 23:29:53,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-18 23:29:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-18 23:29:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-18 23:29:53,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-18 23:29:53,810 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-18 23:29:53,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:53,811 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-18 23:29:53,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 23:29:53,811 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-18 23:29:53,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-18 23:29:53,812 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:53,812 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] [2020-08-18 23:29:53,813 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-18 23:29:53,813 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:53,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:53,813 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-18 23:29:53,813 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:53,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299421612] [2020-08-18 23:29:53,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:53,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,848 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:53,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:53,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:53,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:53,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:54,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-18 23:29:54,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:54,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:29:54,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:54,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-18 23:29:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:54,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299421612] [2020-08-18 23:29:54,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 23:29:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345078791] [2020-08-18 23:29:54,650 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 23:29:54,650 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 23:29:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:29:54,651 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-18 23:29:56,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:56,120 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-18 23:29:56,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 23:29:56,121 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-18 23:29:56,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:56,122 INFO L225 Difference]: With dead ends: 418 [2020-08-18 23:29:56,122 INFO L226 Difference]: Without dead ends: 295 [2020-08-18 23:29:56,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-18 23:29:56,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-18 23:29:56,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-18 23:29:56,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-18 23:29:56,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-18 23:29:56,144 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-18 23:29:56,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:56,144 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-18 23:29:56,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 23:29:56,144 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-18 23:29:56,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-18 23:29:56,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:56,146 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] [2020-08-18 23:29:56,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-18 23:29:56,146 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:56,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:56,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-18 23:29:56,147 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:56,147 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1176304422] [2020-08-18 23:29:56,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:56,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:56,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:56,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-18 23:29:56,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-18 23:29:56,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-18 23:29:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-18 23:29:56,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1176304422] [2020-08-18 23:29:56,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:56,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 23:29:56,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756933445] [2020-08-18 23:29:56,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 23:29:56,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:56,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 23:29:56,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-18 23:29:56,695 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-18 23:29:57,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:57,126 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-18 23:29:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 23:29:57,127 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-18 23:29:57,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:57,129 INFO L225 Difference]: With dead ends: 533 [2020-08-18 23:29:57,129 INFO L226 Difference]: Without dead ends: 404 [2020-08-18 23:29:57,130 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 [2020-08-18 23:29:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-18 23:29:57,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-18 23:29:57,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-18 23:29:57,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-18 23:29:57,150 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-18 23:29:57,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:57,151 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-18 23:29:57,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 23:29:57,151 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-18 23:29:57,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 23:29:57,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:57,152 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] [2020-08-18 23:29:57,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-18 23:29:57,153 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:57,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:57,153 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-18 23:29:57,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:57,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131704428] [2020-08-18 23:29:57,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:57,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:57,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:57,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:57,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:57,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 23:29:57,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 23:29:57,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131704428] [2020-08-18 23:29:57,333 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:57,333 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-18 23:29:57,333 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014843981] [2020-08-18 23:29:57,334 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:29:57,334 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:57,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:29:57,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:29:57,335 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-18 23:29:57,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:57,572 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-18 23:29:57,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:29:57,573 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 23:29:57,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:57,575 INFO L225 Difference]: With dead ends: 271 [2020-08-18 23:29:57,575 INFO L226 Difference]: Without dead ends: 261 [2020-08-18 23:29:57,576 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 [2020-08-18 23:29:57,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-18 23:29:57,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-18 23:29:57,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-18 23:29:57,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-18 23:29:57,598 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-18 23:29:57,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:57,599 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-18 23:29:57,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:29:57,599 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-18 23:29:57,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-18 23:29:57,600 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:57,601 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] [2020-08-18 23:29:57,601 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-18 23:29:57,601 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:57,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:57,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-18 23:29:57,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:57,602 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062195818] [2020-08-18 23:29:57,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:57,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:57,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:57,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:57,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 23:29:57,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:57,890 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 23:29:57,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062195818] [2020-08-18 23:29:57,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:57,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:29:57,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377274198] [2020-08-18 23:29:57,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:29:57,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:57,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:29:57,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:29:57,894 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-18 23:29:58,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:58,105 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-18 23:29:58,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:29:58,106 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-18 23:29:58,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:58,111 INFO L225 Difference]: With dead ends: 285 [2020-08-18 23:29:58,111 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 23:29:58,112 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 [2020-08-18 23:29:58,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 23:29:58,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-18 23:29:58,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 23:29:58,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-18 23:29:58,151 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-18 23:29:58,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:58,152 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-18 23:29:58,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:29:58,152 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-18 23:29:58,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 23:29:58,154 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:58,155 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] [2020-08-18 23:29:58,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-18 23:29:58,155 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:58,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:58,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-18 23:29:58,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:58,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434854194] [2020-08-18 23:29:58,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:58,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:58,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:58,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,264 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:58,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,265 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:58,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 23:29:58,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,276 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-18 23:29:58,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434854194] [2020-08-18 23:29:58,277 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:58,277 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 23:29:58,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920265864] [2020-08-18 23:29:58,278 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 23:29:58,278 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:58,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 23:29:58,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 23:29:58,279 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-18 23:29:58,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:58,344 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-18 23:29:58,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 23:29:58,345 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-18 23:29:58,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:58,347 INFO L225 Difference]: With dead ends: 271 [2020-08-18 23:29:58,348 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 23:29:58,348 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 [2020-08-18 23:29:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 23:29:58,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-18 23:29:58,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-18 23:29:58,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-18 23:29:58,382 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-18 23:29:58,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:58,382 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-18 23:29:58,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 23:29:58,382 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-18 23:29:58,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-18 23:29:58,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:58,385 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] [2020-08-18 23:29:58,385 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-18 23:29:58,385 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:58,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:58,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-18 23:29:58,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:58,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [524444241] [2020-08-18 23:29:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:58,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:58,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:58,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:58,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 23:29:58,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:58,765 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 23:29:58,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [524444241] [2020-08-18 23:29:58,766 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:58,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 23:29:58,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970524161] [2020-08-18 23:29:58,767 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 23:29:58,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:58,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 23:29:58,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-18 23:29:58,768 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-18 23:29:59,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:59,015 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-18 23:29:59,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:29:59,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-18 23:29:59,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:59,019 INFO L225 Difference]: With dead ends: 284 [2020-08-18 23:29:59,020 INFO L226 Difference]: Without dead ends: 274 [2020-08-18 23:29:59,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-18 23:29:59,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-18 23:29:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-18 23:29:59,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-18 23:29:59,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-18 23:29:59,052 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-18 23:29:59,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:59,053 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-18 23:29:59,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 23:29:59,053 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-18 23:29:59,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-18 23:29:59,055 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:59,056 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] [2020-08-18 23:29:59,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-18 23:29:59,056 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:59,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:59,056 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-18 23:29:59,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:59,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154240358] [2020-08-18 23:29:59,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:59,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:59,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:59,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,157 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:59,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:59,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-18 23:29:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,251 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 23:29:59,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154240358] [2020-08-18 23:29:59,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:29:59,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-18 23:29:59,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99070115] [2020-08-18 23:29:59,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-18 23:29:59,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:59,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-18 23:29:59,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-18 23:29:59,253 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-18 23:29:59,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:59,386 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-18 23:29:59,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:29:59,386 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-18 23:29:59,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:59,389 INFO L225 Difference]: With dead ends: 303 [2020-08-18 23:29:59,389 INFO L226 Difference]: Without dead ends: 280 [2020-08-18 23:29:59,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:29:59,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-18 23:29:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-18 23:29:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-18 23:29:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-18 23:29:59,424 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-18 23:29:59,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:59,424 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-18 23:29:59,424 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-18 23:29:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-18 23:29:59,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-18 23:29:59,426 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:59,426 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] [2020-08-18 23:29:59,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-18 23:29:59,427 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:59,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:59,427 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-18 23:29:59,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:59,427 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541651779] [2020-08-18 23:29:59,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:59,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:59,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:59,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-18 23:29:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,521 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-18 23:29:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:29:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 23:29:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-18 23:29:59,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541651779] [2020-08-18 23:29:59,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:59,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 23:29:59,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66176610] [2020-08-18 23:29:59,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 23:29:59,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:59,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 23:29:59,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-18 23:29:59,539 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-18 23:29:59,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:29:59,640 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-18 23:29:59,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 23:29:59,641 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-18 23:29:59,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:29:59,643 INFO L225 Difference]: With dead ends: 409 [2020-08-18 23:29:59,643 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 23:29:59,645 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 [2020-08-18 23:29:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 23:29:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-18 23:29:59,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 23:29:59,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-18 23:29:59,666 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-18 23:29:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:29:59,666 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-18 23:29:59,666 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 23:29:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-18 23:29:59,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 23:29:59,667 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:29:59,668 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] [2020-08-18 23:29:59,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-18 23:29:59,668 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:29:59,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:29:59,669 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-18 23:29:59,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:29:59,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855171301] [2020-08-18 23:29:59,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:29:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:29:59,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:29:59,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:29:59,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:29:59,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:29:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 23:29:59,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:29:59,845 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-18 23:29:59,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855171301] [2020-08-18 23:29:59,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:29:59,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 23:29:59,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112877222] [2020-08-18 23:29:59,846 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 23:29:59,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:29:59,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 23:29:59,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-18 23:29:59,847 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-18 23:30:00,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:00,033 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-18 23:30:00,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-18 23:30:00,034 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-18 23:30:00,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:00,036 INFO L225 Difference]: With dead ends: 173 [2020-08-18 23:30:00,036 INFO L226 Difference]: Without dead ends: 163 [2020-08-18 23:30:00,036 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 [2020-08-18 23:30:00,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-18 23:30:00,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-18 23:30:00,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 23:30:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-18 23:30:00,062 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-18 23:30:00,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:00,063 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-18 23:30:00,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 23:30:00,063 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-18 23:30:00,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-18 23:30:00,064 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:00,065 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] [2020-08-18 23:30:00,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-18 23:30:00,065 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:00,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:00,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-18 23:30:00,066 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:00,066 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391652944] [2020-08-18 23:30:00,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:00,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:00,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:00,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:00,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-18 23:30:00,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-18 23:30:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,338 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-18 23:30:00,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391652944] [2020-08-18 23:30:00,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:30:00,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:30:00,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982007288] [2020-08-18 23:30:00,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:30:00,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:30:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:30:00,340 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-18 23:30:00,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:00,616 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-18 23:30:00,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 23:30:00,617 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-18 23:30:00,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:00,619 INFO L225 Difference]: With dead ends: 175 [2020-08-18 23:30:00,619 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 23:30:00,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-18 23:30:00,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 23:30:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-18 23:30:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 23:30:00,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-18 23:30:00,634 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-18 23:30:00,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:00,634 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-18 23:30:00,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:30:00,635 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-18 23:30:00,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 23:30:00,636 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:00,636 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:30:00,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-18 23:30:00,637 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:00,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:00,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-18 23:30:00,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:00,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875245428] [2020-08-18 23:30:00,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:00,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:00,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,778 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:00,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:30:00,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:30:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:00,960 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-18 23:30:00,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875245428] [2020-08-18 23:30:00,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 23:30:00,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-18 23:30:00,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753663911] [2020-08-18 23:30:00,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:30:00,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:00,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:30:00,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:30:00,963 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-18 23:30:01,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:01,215 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-18 23:30:01,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:30:01,215 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 23:30:01,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:01,217 INFO L225 Difference]: With dead ends: 184 [2020-08-18 23:30:01,217 INFO L226 Difference]: Without dead ends: 174 [2020-08-18 23:30:01,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:30:01,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-18 23:30:01,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-18 23:30:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-18 23:30:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-18 23:30:01,239 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-18 23:30:01,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:01,239 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-18 23:30:01,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:30:01,239 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-18 23:30:01,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 23:30:01,240 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:01,241 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:30:01,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-18 23:30:01,241 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:01,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:01,241 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-18 23:30:01,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:01,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46736196] [2020-08-18 23:30:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:01,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:01,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:01,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:01,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:30:01,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,505 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:30:01,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,522 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 23:30:01,523 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46736196] [2020-08-18 23:30:01,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:30:01,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 23:30:01,524 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355437687] [2020-08-18 23:30:01,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 23:30:01,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:01,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 23:30:01,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-18 23:30:01,525 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-18 23:30:01,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:01,746 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-18 23:30:01,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:30:01,747 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-18 23:30:01,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:01,749 INFO L225 Difference]: With dead ends: 194 [2020-08-18 23:30:01,751 INFO L226 Difference]: Without dead ends: 150 [2020-08-18 23:30:01,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-18 23:30:01,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-18 23:30:01,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-18 23:30:01,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 23:30:01,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-18 23:30:01,774 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-18 23:30:01,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:01,775 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-18 23:30:01,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 23:30:01,775 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-18 23:30:01,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 23:30:01,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:01,777 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] [2020-08-18 23:30:01,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-18 23:30:01,777 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:01,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:01,778 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-18 23:30:01,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:01,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1517359934] [2020-08-18 23:30:01,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:01,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,892 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:01,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:01,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:01,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:01,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:30:01,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:01,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:30:01,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-18 23:30:02,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1517359934] [2020-08-18 23:30:02,058 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:30:02,058 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:30:02,058 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498901507] [2020-08-18 23:30:02,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:30:02,059 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:02,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:30:02,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:30:02,059 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-18 23:30:02,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:02,251 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-18 23:30:02,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:30:02,253 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 23:30:02,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:02,254 INFO L225 Difference]: With dead ends: 160 [2020-08-18 23:30:02,254 INFO L226 Difference]: Without dead ends: 140 [2020-08-18 23:30:02,255 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:30:02,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-18 23:30:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-18 23:30:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-18 23:30:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-18 23:30:02,277 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-18 23:30:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:02,278 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-18 23:30:02,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:30:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-18 23:30:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 23:30:02,280 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:02,280 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] [2020-08-18 23:30:02,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-18 23:30:02,281 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:02,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:02,281 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-18 23:30:02,281 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:02,282 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1243503822] [2020-08-18 23:30:02,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:02,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:02,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:02,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:02,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,541 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:30:02,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:30:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-18 23:30:02,691 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1243503822] [2020-08-18 23:30:02,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:30:02,692 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 23:30:02,692 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553950050] [2020-08-18 23:30:02,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 23:30:02,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:02,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 23:30:02,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-18 23:30:02,693 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-18 23:30:02,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:02,966 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-18 23:30:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 23:30:02,968 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-18 23:30:02,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:02,969 INFO L225 Difference]: With dead ends: 155 [2020-08-18 23:30:02,969 INFO L226 Difference]: Without dead ends: 137 [2020-08-18 23:30:02,970 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-18 23:30:02,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-18 23:30:02,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-18 23:30:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 23:30:02,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-18 23:30:02,988 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-18 23:30:02,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:02,988 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-18 23:30:02,988 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 23:30:02,989 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-18 23:30:02,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-18 23:30:02,990 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 23:30:02,990 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 23:30:02,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-18 23:30:02,991 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 23:30:02,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 23:30:02,991 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-18 23:30:02,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 23:30:02,992 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272489297] [2020-08-18 23:30:02,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 23:30:03,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 23:30:03,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-18 23:30:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-18 23:30:03,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-18 23:30:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-18 23:30:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-18 23:30:03,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 23:30:03,316 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-18 23:30:03,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272489297] [2020-08-18 23:30:03,317 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 23:30:03,317 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 23:30:03,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708674581] [2020-08-18 23:30:03,318 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 23:30:03,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 23:30:03,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 23:30:03,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-18 23:30:03,319 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-18 23:30:03,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 23:30:03,484 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-18 23:30:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-18 23:30:03,484 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-18 23:30:03,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 23:30:03,485 INFO L225 Difference]: With dead ends: 137 [2020-08-18 23:30:03,485 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 23:30:03,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-18 23:30:03,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 23:30:03,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 23:30:03,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 23:30:03,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 23:30:03,487 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-18 23:30:03,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 23:30:03,489 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 23:30:03,489 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 23:30:03,489 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 23:30:03,490 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 23:30:03,490 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-18 23:30:03,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 23:30:04,277 WARN L193 SmtUtils]: Spent 765.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136