/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.5 -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-5644d1e-m [2020-08-19 06:46:15,438 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-19 06:46:15,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-19 06:46:15,465 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-19 06:46:15,465 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-19 06:46:15,466 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-19 06:46:15,468 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-19 06:46:15,470 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-19 06:46:15,471 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-19 06:46:15,472 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-19 06:46:15,473 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-19 06:46:15,474 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-19 06:46:15,475 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-19 06:46:15,476 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-19 06:46:15,477 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-19 06:46:15,478 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-19 06:46:15,479 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-19 06:46:15,480 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-19 06:46:15,481 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-19 06:46:15,483 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-19 06:46:15,485 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-19 06:46:15,486 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-19 06:46:15,487 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-19 06:46:15,488 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-19 06:46:15,493 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-19 06:46:15,503 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-19 06:46:15,504 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-19 06:46:15,510 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-19 06:46:15,511 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-19 06:46:15,553 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-19 06:46:15,553 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-19 06:46:15,556 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-19 06:46:15,556 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-19 06:46:15,557 INFO L138 SettingsManager]: * Use SBE=true [2020-08-19 06:46:15,557 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-19 06:46:15,557 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-19 06:46:15,557 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-19 06:46:15,557 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-19 06:46:15,558 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-19 06:46:15,558 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-19 06:46:15,559 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-19 06:46:15,559 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-19 06:46:15,559 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-19 06:46:15,560 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-19 06:46:15,560 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-19 06:46:15,561 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-19 06:46:15,561 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-19 06:46:15,561 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-19 06:46:15,561 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-19 06:46:15,561 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-19 06:46:15,561 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:46:15,562 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-19 06:46:15,562 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-19 06:46:15,562 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-19 06:46:15,563 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-19 06:46:15,563 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-19 06:46:15,563 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-19 06:46:15,563 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-19 06:46:15,563 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.5; [2020-08-19 06:46:15,903 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-19 06:46:15,920 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-19 06:46:15,924 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-19 06:46:15,926 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-19 06:46:15,926 INFO L275 PluginConnector]: CDTParser initialized [2020-08-19 06:46:15,927 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 06:46:16,006 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f954ab2be/95570d602888423d9cc60c5f4280af7f/FLAGc449706c4 [2020-08-19 06:46:16,534 INFO L306 CDTParser]: Found 1 translation units. [2020-08-19 06:46:16,535 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/bitvector/soft_float_2a.c.cil.c [2020-08-19 06:46:16,543 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f954ab2be/95570d602888423d9cc60c5f4280af7f/FLAGc449706c4 [2020-08-19 06:46:16,946 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/f954ab2be/95570d602888423d9cc60c5f4280af7f [2020-08-19 06:46:16,956 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-19 06:46:16,958 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-19 06:46:16,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-19 06:46:16,959 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-19 06:46:16,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-19 06:46:16,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:46:16" (1/1) ... [2020-08-19 06:46:16,966 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@478ac3cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:16, skipping insertion in model container [2020-08-19 06:46:16,967 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.08 06:46:16" (1/1) ... [2020-08-19 06:46:16,974 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-19 06:46:17,015 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-19 06:46:17,246 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:46:17,250 INFO L203 MainTranslator]: Completed pre-run [2020-08-19 06:46:17,381 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-19 06:46:17,395 INFO L208 MainTranslator]: Completed translation [2020-08-19 06:46:17,396 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17 WrapperNode [2020-08-19 06:46:17,396 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-19 06:46:17,397 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-19 06:46:17,397 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-19 06:46:17,397 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-19 06:46:17,410 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,410 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,416 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,417 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,433 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,435 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... [2020-08-19 06:46:17,438 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-19 06:46:17,438 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-19 06:46:17,438 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-19 06:46:17,438 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-19 06:46:17,439 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-19 06:46:17,512 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-19 06:46:17,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-19 06:46:17,513 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-19 06:46:17,514 INFO L138 BoogieDeclarations]: Found implementation of procedure base2flt [2020-08-19 06:46:17,514 INFO L138 BoogieDeclarations]: Found implementation of procedure addflt [2020-08-19 06:46:17,514 INFO L138 BoogieDeclarations]: Found implementation of procedure mulflt [2020-08-19 06:46:17,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-19 06:46:17,515 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-19 06:46:17,516 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-08-19 06:46:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2020-08-19 06:46:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-19 06:46:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure base2flt [2020-08-19 06:46:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure addflt [2020-08-19 06:46:17,517 INFO L130 BoogieDeclarations]: Found specification of procedure mulflt [2020-08-19 06:46:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-19 06:46:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-19 06:46:17,518 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-19 06:46:17,937 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-19 06:46:17,937 INFO L295 CfgBuilder]: Removed 2 assume(true) statements. [2020-08-19 06:46:17,942 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:46:17 BoogieIcfgContainer [2020-08-19 06:46:17,942 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-19 06:46:17,944 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-19 06:46:17,944 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-19 06:46:17,947 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-19 06:46:17,947 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.08 06:46:16" (1/3) ... [2020-08-19 06:46:17,948 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceec6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:46:17, skipping insertion in model container [2020-08-19 06:46:17,948 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.08 06:46:17" (2/3) ... [2020-08-19 06:46:17,949 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2ceec6b0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.08 06:46:17, skipping insertion in model container [2020-08-19 06:46:17,949 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.08 06:46:17" (3/3) ... [2020-08-19 06:46:17,951 INFO L109 eAbstractionObserver]: Analyzing ICFG soft_float_2a.c.cil.c [2020-08-19 06:46:17,963 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-19 06:46:17,970 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-19 06:46:17,989 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-19 06:46:18,019 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-19 06:46:18,019 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-19 06:46:18,020 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-19 06:46:18,020 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-19 06:46:18,020 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-19 06:46:18,020 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-19 06:46:18,021 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-19 06:46:18,021 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-19 06:46:18,040 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states. [2020-08-19 06:46:18,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-19 06:46:18,048 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:18,049 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:18,049 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:18,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:18,055 INFO L82 PathProgramCache]: Analyzing trace with hash -1570912407, now seen corresponding path program 1 times [2020-08-19 06:46:18,063 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:18,063 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521674111] [2020-08-19 06:46:18,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,235 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:18,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:18,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-08-19 06:46:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,334 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2020-08-19 06:46:18,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:18,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,375 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:18,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521674111] [2020-08-19 06:46:18,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:18,379 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 06:46:18,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343405424] [2020-08-19 06:46:18,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:18,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:18,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:18,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:18,413 INFO L87 Difference]: Start difference. First operand 68 states. Second operand 4 states. [2020-08-19 06:46:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:18,590 INFO L93 Difference]: Finished difference Result 136 states and 213 transitions. [2020-08-19 06:46:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:46:18,592 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 48 [2020-08-19 06:46:18,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:18,605 INFO L225 Difference]: With dead ends: 136 [2020-08-19 06:46:18,605 INFO L226 Difference]: Without dead ends: 76 [2020-08-19 06:46:18,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:18,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-19 06:46:18,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 62. [2020-08-19 06:46:18,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-08-19 06:46:18,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 86 transitions. [2020-08-19 06:46:18,664 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 86 transitions. Word has length 48 [2020-08-19 06:46:18,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:18,665 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 86 transitions. [2020-08-19 06:46:18,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:18,665 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 86 transitions. [2020-08-19 06:46:18,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-19 06:46:18,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:18,669 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:18,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-19 06:46:18,669 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:18,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:18,670 INFO L82 PathProgramCache]: Analyzing trace with hash -771486554, now seen corresponding path program 1 times [2020-08-19 06:46:18,670 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:18,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51283193] [2020-08-19 06:46:18,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:18,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:18,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-08-19 06:46:18,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-19 06:46:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:18,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,791 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:18,791 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51283193] [2020-08-19 06:46:18,792 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:18,792 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4] total 4 [2020-08-19 06:46:18,792 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520226343] [2020-08-19 06:46:18,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:18,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:18,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:18,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:18,796 INFO L87 Difference]: Start difference. First operand 62 states and 86 transitions. Second operand 4 states. [2020-08-19 06:46:18,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:18,893 INFO L93 Difference]: Finished difference Result 129 states and 182 transitions. [2020-08-19 06:46:18,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:46:18,893 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 51 [2020-08-19 06:46:18,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:18,896 INFO L225 Difference]: With dead ends: 129 [2020-08-19 06:46:18,896 INFO L226 Difference]: Without dead ends: 79 [2020-08-19 06:46:18,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:18,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-08-19 06:46:18,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 72. [2020-08-19 06:46:18,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-08-19 06:46:18,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 101 transitions. [2020-08-19 06:46:18,915 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 101 transitions. Word has length 51 [2020-08-19 06:46:18,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:18,915 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 101 transitions. [2020-08-19 06:46:18,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:18,915 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 101 transitions. [2020-08-19 06:46:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-19 06:46:18,918 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:18,918 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:18,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-19 06:46:18,919 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:18,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:18,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1553856699, now seen corresponding path program 1 times [2020-08-19 06:46:18,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:18,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839719009] [2020-08-19 06:46:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:18,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:18,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:18,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:18,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:18,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2020-08-19 06:46:19,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:46:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:46:19,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:19,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839719009] [2020-08-19 06:46:19,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:19,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:19,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896006764] [2020-08-19 06:46:19,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:19,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:19,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:19,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:19,150 INFO L87 Difference]: Start difference. First operand 72 states and 101 transitions. Second operand 5 states. [2020-08-19 06:46:19,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,259 INFO L93 Difference]: Finished difference Result 145 states and 205 transitions. [2020-08-19 06:46:19,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:19,261 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 53 [2020-08-19 06:46:19,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,264 INFO L225 Difference]: With dead ends: 145 [2020-08-19 06:46:19,264 INFO L226 Difference]: Without dead ends: 89 [2020-08-19 06:46:19,265 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:19,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-19 06:46:19,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-08-19 06:46:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-08-19 06:46:19,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 104 transitions. [2020-08-19 06:46:19,292 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 104 transitions. Word has length 53 [2020-08-19 06:46:19,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,293 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 104 transitions. [2020-08-19 06:46:19,293 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:19,293 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 104 transitions. [2020-08-19 06:46:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-19 06:46:19,297 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,298 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-19 06:46:19,298 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,299 INFO L82 PathProgramCache]: Analyzing trace with hash 76110071, now seen corresponding path program 1 times [2020-08-19 06:46:19,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501724232] [2020-08-19 06:46:19,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,349 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-19 06:46:19,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-08-19 06:46:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:19,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:19,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501724232] [2020-08-19 06:46:19,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:19,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:19,447 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074816347] [2020-08-19 06:46:19,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:19,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:19,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:19,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:19,448 INFO L87 Difference]: Start difference. First operand 74 states and 104 transitions. Second operand 5 states. [2020-08-19 06:46:19,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,530 INFO L93 Difference]: Finished difference Result 156 states and 218 transitions. [2020-08-19 06:46:19,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:19,531 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 54 [2020-08-19 06:46:19,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,533 INFO L225 Difference]: With dead ends: 156 [2020-08-19 06:46:19,533 INFO L226 Difference]: Without dead ends: 93 [2020-08-19 06:46:19,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:19,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-08-19 06:46:19,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 83. [2020-08-19 06:46:19,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-19 06:46:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 115 transitions. [2020-08-19 06:46:19,549 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 115 transitions. Word has length 54 [2020-08-19 06:46:19,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,550 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 115 transitions. [2020-08-19 06:46:19,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:19,550 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 115 transitions. [2020-08-19 06:46:19,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-19 06:46:19,552 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,553 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-19 06:46:19,554 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1237680982, now seen corresponding path program 1 times [2020-08-19 06:46:19,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060056808] [2020-08-19 06:46:19,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-19 06:46:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:19,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:46:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,742 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 4 proven. 11 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:19,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060056808] [2020-08-19 06:46:19,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:19,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:46:19,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154524628] [2020-08-19 06:46:19,746 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:19,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:19,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:19,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:19,752 INFO L87 Difference]: Start difference. First operand 83 states and 115 transitions. Second operand 6 states. [2020-08-19 06:46:19,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:19,883 INFO L93 Difference]: Finished difference Result 166 states and 233 transitions. [2020-08-19 06:46:19,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:46:19,884 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 56 [2020-08-19 06:46:19,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:19,887 INFO L225 Difference]: With dead ends: 166 [2020-08-19 06:46:19,887 INFO L226 Difference]: Without dead ends: 106 [2020-08-19 06:46:19,889 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:19,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-19 06:46:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 84. [2020-08-19 06:46:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-08-19 06:46:19,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 117 transitions. [2020-08-19 06:46:19,921 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 117 transitions. Word has length 56 [2020-08-19 06:46:19,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:19,922 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 117 transitions. [2020-08-19 06:46:19,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:19,922 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 117 transitions. [2020-08-19 06:46:19,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-19 06:46:19,925 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:19,926 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:19,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-19 06:46:19,929 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:19,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:19,929 INFO L82 PathProgramCache]: Analyzing trace with hash 714432262, now seen corresponding path program 2 times [2020-08-19 06:46:19,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:19,930 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252814697] [2020-08-19 06:46:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:19,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:19,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:19,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:19,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:19,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-08-19 06:46:20,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-19 06:46:20,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:20,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252814697] [2020-08-19 06:46:20,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-19 06:46:20,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131788243] [2020-08-19 06:46:20,084 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:20,084 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:20,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:20,085 INFO L87 Difference]: Start difference. First operand 84 states and 117 transitions. Second operand 6 states. [2020-08-19 06:46:20,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,197 INFO L93 Difference]: Finished difference Result 176 states and 245 transitions. [2020-08-19 06:46:20,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-19 06:46:20,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 57 [2020-08-19 06:46:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,202 INFO L225 Difference]: With dead ends: 176 [2020-08-19 06:46:20,202 INFO L226 Difference]: Without dead ends: 110 [2020-08-19 06:46:20,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:20,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-08-19 06:46:20,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 89. [2020-08-19 06:46:20,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-19 06:46:20,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 124 transitions. [2020-08-19 06:46:20,226 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 124 transitions. Word has length 57 [2020-08-19 06:46:20,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,227 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 124 transitions. [2020-08-19 06:46:20,227 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:20,227 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 124 transitions. [2020-08-19 06:46:20,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-19 06:46:20,229 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,229 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:20,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-19 06:46:20,229 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,230 INFO L82 PathProgramCache]: Analyzing trace with hash 484983205, now seen corresponding path program 2 times [2020-08-19 06:46:20,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1993081103] [2020-08-19 06:46:20,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2020-08-19 06:46:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:46:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 4 proven. 17 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1993081103] [2020-08-19 06:46:20,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:46:20,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129211461] [2020-08-19 06:46:20,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:46:20,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:46:20,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:20,414 INFO L87 Difference]: Start difference. First operand 89 states and 124 transitions. Second operand 7 states. [2020-08-19 06:46:20,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,560 INFO L93 Difference]: Finished difference Result 178 states and 251 transitions. [2020-08-19 06:46:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:46:20,561 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-08-19 06:46:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,563 INFO L225 Difference]: With dead ends: 178 [2020-08-19 06:46:20,563 INFO L226 Difference]: Without dead ends: 115 [2020-08-19 06:46:20,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-08-19 06:46:20,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 90. [2020-08-19 06:46:20,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-08-19 06:46:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 126 transitions. [2020-08-19 06:46:20,576 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 126 transitions. Word has length 59 [2020-08-19 06:46:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,577 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 126 transitions. [2020-08-19 06:46:20,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:46:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 126 transitions. [2020-08-19 06:46:20,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-19 06:46:20,578 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,578 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:20,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-19 06:46:20,579 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,579 INFO L82 PathProgramCache]: Analyzing trace with hash -1144362345, now seen corresponding path program 3 times [2020-08-19 06:46:20,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576203657] [2020-08-19 06:46:20,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,605 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-19 06:46:20,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,676 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2020-08-19 06:46:20,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,687 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,687 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576203657] [2020-08-19 06:46:20,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-19 06:46:20,688 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905931799] [2020-08-19 06:46:20,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-19 06:46:20,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-19 06:46:20,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2020-08-19 06:46:20,690 INFO L87 Difference]: Start difference. First operand 90 states and 126 transitions. Second operand 7 states. [2020-08-19 06:46:20,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:20,780 INFO L93 Difference]: Finished difference Result 193 states and 268 transitions. [2020-08-19 06:46:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-19 06:46:20,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 60 [2020-08-19 06:46:20,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:20,782 INFO L225 Difference]: With dead ends: 193 [2020-08-19 06:46:20,783 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 06:46:20,783 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 06:46:20,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 95. [2020-08-19 06:46:20,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-19 06:46:20,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 133 transitions. [2020-08-19 06:46:20,794 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 133 transitions. Word has length 60 [2020-08-19 06:46:20,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:20,795 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 133 transitions. [2020-08-19 06:46:20,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-19 06:46:20,795 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 133 transitions. [2020-08-19 06:46:20,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-19 06:46:20,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:20,796 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] [2020-08-19 06:46:20,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-19 06:46:20,796 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:20,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:20,797 INFO L82 PathProgramCache]: Analyzing trace with hash 889761014, now seen corresponding path program 3 times [2020-08-19 06:46:20,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:20,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1823558306] [2020-08-19 06:46:20,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:20,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-19 06:46:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:20,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:46:20,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 4 proven. 26 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:20,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1823558306] [2020-08-19 06:46:20,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:20,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:46:20,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807419410] [2020-08-19 06:46:20,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:20,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:20,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:20,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:20,958 INFO L87 Difference]: Start difference. First operand 95 states and 133 transitions. Second operand 8 states. [2020-08-19 06:46:21,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,109 INFO L93 Difference]: Finished difference Result 190 states and 269 transitions. [2020-08-19 06:46:21,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:21,109 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 62 [2020-08-19 06:46:21,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,111 INFO L225 Difference]: With dead ends: 190 [2020-08-19 06:46:21,111 INFO L226 Difference]: Without dead ends: 124 [2020-08-19 06:46:21,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:21,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-08-19 06:46:21,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 96. [2020-08-19 06:46:21,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-08-19 06:46:21,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 135 transitions. [2020-08-19 06:46:21,122 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 135 transitions. Word has length 62 [2020-08-19 06:46:21,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,123 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 135 transitions. [2020-08-19 06:46:21,123 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:21,123 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 135 transitions. [2020-08-19 06:46:21,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-19 06:46:21,124 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,124 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-19 06:46:21,125 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1481152154, now seen corresponding path program 4 times [2020-08-19 06:46:21,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796959544] [2020-08-19 06:46:21,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-08-19 06:46:21,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-19 06:46:21,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:21,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 4 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796959544] [2020-08-19 06:46:21,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-19 06:46:21,261 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792197088] [2020-08-19 06:46:21,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:21,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:21,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:21,262 INFO L87 Difference]: Start difference. First operand 96 states and 135 transitions. Second operand 8 states. [2020-08-19 06:46:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,374 INFO L93 Difference]: Finished difference Result 210 states and 291 transitions. [2020-08-19 06:46:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:21,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 63 [2020-08-19 06:46:21,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,377 INFO L225 Difference]: With dead ends: 210 [2020-08-19 06:46:21,377 INFO L226 Difference]: Without dead ends: 138 [2020-08-19 06:46:21,378 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:21,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-08-19 06:46:21,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 101. [2020-08-19 06:46:21,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-19 06:46:21,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 142 transitions. [2020-08-19 06:46:21,390 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 142 transitions. Word has length 63 [2020-08-19 06:46:21,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,390 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 142 transitions. [2020-08-19 06:46:21,390 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:21,391 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 142 transitions. [2020-08-19 06:46:21,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-19 06:46:21,392 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,392 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,392 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-19 06:46:21,392 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,393 INFO L82 PathProgramCache]: Analyzing trace with hash -642698235, now seen corresponding path program 4 times [2020-08-19 06:46:21,393 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,393 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1994172221] [2020-08-19 06:46:21,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2020-08-19 06:46:21,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:21,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:46:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,558 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 4 proven. 38 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1994172221] [2020-08-19 06:46:21,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:21,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725628606] [2020-08-19 06:46:21,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:21,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:21,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:21,560 INFO L87 Difference]: Start difference. First operand 101 states and 142 transitions. Second operand 9 states. [2020-08-19 06:46:21,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,737 INFO L93 Difference]: Finished difference Result 202 states and 287 transitions. [2020-08-19 06:46:21,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:21,737 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 65 [2020-08-19 06:46:21,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,739 INFO L225 Difference]: With dead ends: 202 [2020-08-19 06:46:21,739 INFO L226 Difference]: Without dead ends: 133 [2020-08-19 06:46:21,740 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:21,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-08-19 06:46:21,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-08-19 06:46:21,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-08-19 06:46:21,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 144 transitions. [2020-08-19 06:46:21,750 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 144 transitions. Word has length 65 [2020-08-19 06:46:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:21,751 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 144 transitions. [2020-08-19 06:46:21,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:21,751 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 144 transitions. [2020-08-19 06:46:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-19 06:46:21,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:21,752 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:21,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-19 06:46:21,753 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:21,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:21,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1742748617, now seen corresponding path program 5 times [2020-08-19 06:46:21,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:21,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200081511] [2020-08-19 06:46:21,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:21,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:21,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,774 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:21,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-19 06:46:21,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-08-19 06:46:21,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:21,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 4 proven. 48 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:21,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200081511] [2020-08-19 06:46:21,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:21,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:21,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302256006] [2020-08-19 06:46:21,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:21,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:21,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:21,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=37, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:21,872 INFO L87 Difference]: Start difference. First operand 102 states and 144 transitions. Second operand 9 states. [2020-08-19 06:46:21,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:21,992 INFO L93 Difference]: Finished difference Result 227 states and 314 transitions. [2020-08-19 06:46:21,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:21,993 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 66 [2020-08-19 06:46:21,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:21,994 INFO L225 Difference]: With dead ends: 227 [2020-08-19 06:46:21,995 INFO L226 Difference]: Without dead ends: 152 [2020-08-19 06:46:21,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:21,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-08-19 06:46:22,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 107. [2020-08-19 06:46:22,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-19 06:46:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2020-08-19 06:46:22,007 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 66 [2020-08-19 06:46:22,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,008 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2020-08-19 06:46:22,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:22,008 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2020-08-19 06:46:22,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-19 06:46:22,009 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,009 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-19 06:46:22,010 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,010 INFO L82 PathProgramCache]: Analyzing trace with hash 1366171286, now seen corresponding path program 5 times [2020-08-19 06:46:22,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,010 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1287684583] [2020-08-19 06:46:22,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-19 06:46:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:22,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:46:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,181 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 4 proven. 53 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1287684583] [2020-08-19 06:46:22,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:22,182 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208823284] [2020-08-19 06:46:22,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:22,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:22,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:22,183 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand 10 states. [2020-08-19 06:46:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:22,407 INFO L93 Difference]: Finished difference Result 214 states and 305 transitions. [2020-08-19 06:46:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:46:22,408 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 68 [2020-08-19 06:46:22,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:22,410 INFO L225 Difference]: With dead ends: 214 [2020-08-19 06:46:22,410 INFO L226 Difference]: Without dead ends: 142 [2020-08-19 06:46:22,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:22,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-08-19 06:46:22,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 108. [2020-08-19 06:46:22,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-08-19 06:46:22,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 153 transitions. [2020-08-19 06:46:22,422 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 153 transitions. Word has length 68 [2020-08-19 06:46:22,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,423 INFO L479 AbstractCegarLoop]: Abstraction has 108 states and 153 transitions. [2020-08-19 06:46:22,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:22,423 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 153 transitions. [2020-08-19 06:46:22,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-19 06:46:22,424 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,424 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,425 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-19 06:46:22,425 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,425 INFO L82 PathProgramCache]: Analyzing trace with hash 402664390, now seen corresponding path program 6 times [2020-08-19 06:46:22,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,426 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [573665691] [2020-08-19 06:46:22,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-08-19 06:46:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-19 06:46:22,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:22,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,573 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,574 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [573665691] [2020-08-19 06:46:22,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:22,575 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115145900] [2020-08-19 06:46:22,575 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:22,575 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:22,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:22,576 INFO L87 Difference]: Start difference. First operand 108 states and 153 transitions. Second operand 10 states. [2020-08-19 06:46:22,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:22,706 INFO L93 Difference]: Finished difference Result 244 states and 337 transitions. [2020-08-19 06:46:22,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-19 06:46:22,706 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-08-19 06:46:22,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:22,708 INFO L225 Difference]: With dead ends: 244 [2020-08-19 06:46:22,708 INFO L226 Difference]: Without dead ends: 166 [2020-08-19 06:46:22,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:22,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-08-19 06:46:22,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 113. [2020-08-19 06:46:22,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-19 06:46:22,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 160 transitions. [2020-08-19 06:46:22,724 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 160 transitions. Word has length 69 [2020-08-19 06:46:22,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:22,724 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 160 transitions. [2020-08-19 06:46:22,724 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:22,724 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 160 transitions. [2020-08-19 06:46:22,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-19 06:46:22,725 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:22,726 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:22,726 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-19 06:46:22,726 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:22,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:22,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1523768933, now seen corresponding path program 6 times [2020-08-19 06:46:22,728 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:22,728 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288882523] [2020-08-19 06:46:22,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:22,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:22,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2020-08-19 06:46:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,927 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:46:22,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:22,940 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 4 proven. 71 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:22,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288882523] [2020-08-19 06:46:22,940 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:22,940 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:46:22,941 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270658417] [2020-08-19 06:46:22,941 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:22,941 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:22,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:22,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:22,942 INFO L87 Difference]: Start difference. First operand 113 states and 160 transitions. Second operand 11 states. [2020-08-19 06:46:23,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:23,241 INFO L93 Difference]: Finished difference Result 226 states and 323 transitions. [2020-08-19 06:46:23,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:46:23,242 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-08-19 06:46:23,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:23,245 INFO L225 Difference]: With dead ends: 226 [2020-08-19 06:46:23,246 INFO L226 Difference]: Without dead ends: 151 [2020-08-19 06:46:23,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:23,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-08-19 06:46:23,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 114. [2020-08-19 06:46:23,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-19 06:46:23,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 162 transitions. [2020-08-19 06:46:23,270 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 162 transitions. Word has length 71 [2020-08-19 06:46:23,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:23,271 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 162 transitions. [2020-08-19 06:46:23,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:23,271 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 162 transitions. [2020-08-19 06:46:23,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-19 06:46:23,273 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:23,273 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:23,274 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-19 06:46:23,274 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:23,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:23,274 INFO L82 PathProgramCache]: Analyzing trace with hash 993224151, now seen corresponding path program 7 times [2020-08-19 06:46:23,275 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:23,275 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794101439] [2020-08-19 06:46:23,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:23,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,322 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,324 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:23,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:23,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-19 06:46:23,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2020-08-19 06:46:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,492 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 4 proven. 85 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:23,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794101439] [2020-08-19 06:46:23,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:23,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:46:23,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849590287] [2020-08-19 06:46:23,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:23,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:23,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:23,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=56, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:23,499 INFO L87 Difference]: Start difference. First operand 114 states and 162 transitions. Second operand 11 states. [2020-08-19 06:46:23,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:23,659 INFO L93 Difference]: Finished difference Result 261 states and 360 transitions. [2020-08-19 06:46:23,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-19 06:46:23,660 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-08-19 06:46:23,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:23,661 INFO L225 Difference]: With dead ends: 261 [2020-08-19 06:46:23,661 INFO L226 Difference]: Without dead ends: 180 [2020-08-19 06:46:23,662 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 [2020-08-19 06:46:23,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-08-19 06:46:23,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 119. [2020-08-19 06:46:23,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-08-19 06:46:23,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 169 transitions. [2020-08-19 06:46:23,674 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 169 transitions. Word has length 72 [2020-08-19 06:46:23,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:23,674 INFO L479 AbstractCegarLoop]: Abstraction has 119 states and 169 transitions. [2020-08-19 06:46:23,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:23,674 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 169 transitions. [2020-08-19 06:46:23,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-19 06:46:23,675 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:23,676 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:23,676 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-19 06:46:23,676 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:23,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:23,677 INFO L82 PathProgramCache]: Analyzing trace with hash 2116016182, now seen corresponding path program 7 times [2020-08-19 06:46:23,677 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:23,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254310084] [2020-08-19 06:46:23,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:23,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:23,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:23,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-19 06:46:23,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:23,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:23,936 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 4 proven. 92 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:23,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254310084] [2020-08-19 06:46:23,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:23,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:23,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566936668] [2020-08-19 06:46:23,938 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:23,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:23,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:23,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:23,939 INFO L87 Difference]: Start difference. First operand 119 states and 169 transitions. Second operand 12 states. [2020-08-19 06:46:24,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:24,199 INFO L93 Difference]: Finished difference Result 238 states and 341 transitions. [2020-08-19 06:46:24,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:46:24,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-08-19 06:46:24,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:24,203 INFO L225 Difference]: With dead ends: 238 [2020-08-19 06:46:24,203 INFO L226 Difference]: Without dead ends: 160 [2020-08-19 06:46:24,204 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:24,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-08-19 06:46:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 120. [2020-08-19 06:46:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-08-19 06:46:24,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 171 transitions. [2020-08-19 06:46:24,218 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 171 transitions. Word has length 74 [2020-08-19 06:46:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:24,218 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 171 transitions. [2020-08-19 06:46:24,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:24,218 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 171 transitions. [2020-08-19 06:46:24,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-19 06:46:24,220 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:24,220 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] [2020-08-19 06:46:24,221 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-19 06:46:24,221 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:24,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:24,223 INFO L82 PathProgramCache]: Analyzing trace with hash -2121947610, now seen corresponding path program 8 times [2020-08-19 06:46:24,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:24,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302628526] [2020-08-19 06:46:24,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:24,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:24,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:24,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:24,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2020-08-19 06:46:24,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-19 06:46:24,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:24,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,398 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 4 proven. 108 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:24,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302628526] [2020-08-19 06:46:24,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:24,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:24,399 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922806140] [2020-08-19 06:46:24,401 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:24,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:24,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:24,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=67, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:24,407 INFO L87 Difference]: Start difference. First operand 120 states and 171 transitions. Second operand 12 states. [2020-08-19 06:46:24,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:24,565 INFO L93 Difference]: Finished difference Result 278 states and 383 transitions. [2020-08-19 06:46:24,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:46:24,567 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 75 [2020-08-19 06:46:24,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:24,569 INFO L225 Difference]: With dead ends: 278 [2020-08-19 06:46:24,570 INFO L226 Difference]: Without dead ends: 194 [2020-08-19 06:46:24,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:24,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-08-19 06:46:24,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 125. [2020-08-19 06:46:24,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-08-19 06:46:24,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 178 transitions. [2020-08-19 06:46:24,587 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 178 transitions. Word has length 75 [2020-08-19 06:46:24,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:24,587 INFO L479 AbstractCegarLoop]: Abstraction has 125 states and 178 transitions. [2020-08-19 06:46:24,588 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:24,588 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 178 transitions. [2020-08-19 06:46:24,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-19 06:46:24,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:24,592 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:24,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-19 06:46:24,592 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:24,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:24,592 INFO L82 PathProgramCache]: Analyzing trace with hash 2028159173, now seen corresponding path program 8 times [2020-08-19 06:46:24,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:24,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [321089184] [2020-08-19 06:46:24,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:24,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:24,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-08-19 06:46:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:24,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:46:24,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:24,879 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 4 proven. 116 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:24,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [321089184] [2020-08-19 06:46:24,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:24,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:46:24,880 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078060770] [2020-08-19 06:46:24,881 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:46:24,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:24,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:46:24,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:24,883 INFO L87 Difference]: Start difference. First operand 125 states and 178 transitions. Second operand 13 states. [2020-08-19 06:46:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:25,148 INFO L93 Difference]: Finished difference Result 250 states and 359 transitions. [2020-08-19 06:46:25,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:46:25,149 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 77 [2020-08-19 06:46:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:25,150 INFO L225 Difference]: With dead ends: 250 [2020-08-19 06:46:25,151 INFO L226 Difference]: Without dead ends: 169 [2020-08-19 06:46:25,151 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:25,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-08-19 06:46:25,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 126. [2020-08-19 06:46:25,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-08-19 06:46:25,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 180 transitions. [2020-08-19 06:46:25,163 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 180 transitions. Word has length 77 [2020-08-19 06:46:25,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:25,164 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 180 transitions. [2020-08-19 06:46:25,164 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:46:25,164 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 180 transitions. [2020-08-19 06:46:25,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-19 06:46:25,165 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:25,165 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:25,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-19 06:46:25,165 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:25,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:25,166 INFO L82 PathProgramCache]: Analyzing trace with hash -550547593, now seen corresponding path program 9 times [2020-08-19 06:46:25,166 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:25,166 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778165758] [2020-08-19 06:46:25,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:25,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:25,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,194 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:25,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:25,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-19 06:46:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2020-08-19 06:46:25,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:25,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,368 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 4 proven. 134 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:25,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778165758] [2020-08-19 06:46:25,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:25,368 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:46:25,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131857843] [2020-08-19 06:46:25,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:46:25,369 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:25,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:46:25,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=79, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:25,370 INFO L87 Difference]: Start difference. First operand 126 states and 180 transitions. Second operand 13 states. [2020-08-19 06:46:25,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:25,518 INFO L93 Difference]: Finished difference Result 295 states and 406 transitions. [2020-08-19 06:46:25,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-19 06:46:25,521 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 78 [2020-08-19 06:46:25,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:25,522 INFO L225 Difference]: With dead ends: 295 [2020-08-19 06:46:25,523 INFO L226 Difference]: Without dead ends: 208 [2020-08-19 06:46:25,524 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-08-19 06:46:25,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 131. [2020-08-19 06:46:25,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-19 06:46:25,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 187 transitions. [2020-08-19 06:46:25,535 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 187 transitions. Word has length 78 [2020-08-19 06:46:25,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:25,535 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 187 transitions. [2020-08-19 06:46:25,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:46:25,535 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 187 transitions. [2020-08-19 06:46:25,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-19 06:46:25,536 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:25,537 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:25,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-19 06:46:25,537 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:25,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:25,537 INFO L82 PathProgramCache]: Analyzing trace with hash 315087318, now seen corresponding path program 9 times [2020-08-19 06:46:25,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:25,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871519348] [2020-08-19 06:46:25,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:25,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:25,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:25,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-19 06:46:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:25,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 06:46:25,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:25,891 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 4 proven. 143 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:25,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871519348] [2020-08-19 06:46:25,891 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:25,891 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:46:25,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137916862] [2020-08-19 06:46:25,892 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:46:25,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:25,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:46:25,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:25,893 INFO L87 Difference]: Start difference. First operand 131 states and 187 transitions. Second operand 14 states. [2020-08-19 06:46:26,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:26,312 INFO L93 Difference]: Finished difference Result 262 states and 377 transitions. [2020-08-19 06:46:26,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:46:26,313 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 80 [2020-08-19 06:46:26,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:26,315 INFO L225 Difference]: With dead ends: 262 [2020-08-19 06:46:26,315 INFO L226 Difference]: Without dead ends: 178 [2020-08-19 06:46:26,316 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:26,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-08-19 06:46:26,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-08-19 06:46:26,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-08-19 06:46:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 189 transitions. [2020-08-19 06:46:26,328 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 189 transitions. Word has length 80 [2020-08-19 06:46:26,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:26,328 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 189 transitions. [2020-08-19 06:46:26,328 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:46:26,328 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 189 transitions. [2020-08-19 06:46:26,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-19 06:46:26,329 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:26,330 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:26,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-19 06:46:26,330 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:26,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2116167546, now seen corresponding path program 10 times [2020-08-19 06:46:26,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:26,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360742065] [2020-08-19 06:46:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:26,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:26,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:26,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2020-08-19 06:46:26,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-19 06:46:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 4 proven. 163 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:26,545 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360742065] [2020-08-19 06:46:26,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:26,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-19 06:46:26,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372308656] [2020-08-19 06:46:26,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-19 06:46:26,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:26,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-19 06:46:26,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=92, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:26,546 INFO L87 Difference]: Start difference. First operand 132 states and 189 transitions. Second operand 14 states. [2020-08-19 06:46:26,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:26,727 INFO L93 Difference]: Finished difference Result 312 states and 429 transitions. [2020-08-19 06:46:26,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:46:26,728 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 81 [2020-08-19 06:46:26,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:26,730 INFO L225 Difference]: With dead ends: 312 [2020-08-19 06:46:26,730 INFO L226 Difference]: Without dead ends: 222 [2020-08-19 06:46:26,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:26,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-08-19 06:46:26,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 137. [2020-08-19 06:46:26,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 06:46:26,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 196 transitions. [2020-08-19 06:46:26,749 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 196 transitions. Word has length 81 [2020-08-19 06:46:26,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:26,749 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 196 transitions. [2020-08-19 06:46:26,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-19 06:46:26,749 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 196 transitions. [2020-08-19 06:46:26,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-19 06:46:26,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:26,751 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 10, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:26,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-19 06:46:26,751 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:26,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:26,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1007133915, now seen corresponding path program 10 times [2020-08-19 06:46:26,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:26,752 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45504809] [2020-08-19 06:46:26,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:26,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:26,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:26,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:26,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-08-19 06:46:27,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:46:27,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 195 backedges. 4 proven. 173 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:27,101 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45504809] [2020-08-19 06:46:27,101 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:27,101 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:46:27,101 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993891607] [2020-08-19 06:46:27,102 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:46:27,102 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:27,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:46:27,102 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:27,103 INFO L87 Difference]: Start difference. First operand 137 states and 196 transitions. Second operand 15 states. [2020-08-19 06:46:27,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:27,517 INFO L93 Difference]: Finished difference Result 274 states and 395 transitions. [2020-08-19 06:46:27,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:46:27,518 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 83 [2020-08-19 06:46:27,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:27,520 INFO L225 Difference]: With dead ends: 274 [2020-08-19 06:46:27,520 INFO L226 Difference]: Without dead ends: 187 [2020-08-19 06:46:27,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:27,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-08-19 06:46:27,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 138. [2020-08-19 06:46:27,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-08-19 06:46:27,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 198 transitions. [2020-08-19 06:46:27,533 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 198 transitions. Word has length 83 [2020-08-19 06:46:27,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:27,533 INFO L479 AbstractCegarLoop]: Abstraction has 138 states and 198 transitions. [2020-08-19 06:46:27,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:46:27,533 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 198 transitions. [2020-08-19 06:46:27,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-19 06:46:27,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:27,535 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:27,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-19 06:46:27,535 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:27,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:27,535 INFO L82 PathProgramCache]: Analyzing trace with hash -155352809, now seen corresponding path program 11 times [2020-08-19 06:46:27,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:27,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91301427] [2020-08-19 06:46:27,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:27,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:27,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-19 06:46:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-08-19 06:46:27,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:27,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,763 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 4 proven. 195 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:27,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91301427] [2020-08-19 06:46:27,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:27,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-19 06:46:27,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162974233] [2020-08-19 06:46:27,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-19 06:46:27,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:27,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-19 06:46:27,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=106, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:27,765 INFO L87 Difference]: Start difference. First operand 138 states and 198 transitions. Second operand 15 states. [2020-08-19 06:46:27,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:27,928 INFO L93 Difference]: Finished difference Result 329 states and 452 transitions. [2020-08-19 06:46:27,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-19 06:46:27,929 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 84 [2020-08-19 06:46:27,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:27,931 INFO L225 Difference]: With dead ends: 329 [2020-08-19 06:46:27,931 INFO L226 Difference]: Without dead ends: 236 [2020-08-19 06:46:27,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:27,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-08-19 06:46:27,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 143. [2020-08-19 06:46:27,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-08-19 06:46:27,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 205 transitions. [2020-08-19 06:46:27,944 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 205 transitions. Word has length 84 [2020-08-19 06:46:27,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:27,945 INFO L479 AbstractCegarLoop]: Abstraction has 143 states and 205 transitions. [2020-08-19 06:46:27,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-19 06:46:27,945 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 205 transitions. [2020-08-19 06:46:27,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-19 06:46:27,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:27,947 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 11, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:27,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-19 06:46:27,947 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:27,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:27,947 INFO L82 PathProgramCache]: Analyzing trace with hash 2140152694, now seen corresponding path program 11 times [2020-08-19 06:46:27,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:27,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658787737] [2020-08-19 06:46:27,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:27,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:27,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:27,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:27,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-19 06:46:28,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:28,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,238 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:46:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,252 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 4 proven. 206 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:28,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658787737] [2020-08-19 06:46:28,253 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:28,253 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:46:28,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [60491307] [2020-08-19 06:46:28,253 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:46:28,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:28,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:46:28,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:28,254 INFO L87 Difference]: Start difference. First operand 143 states and 205 transitions. Second operand 16 states. [2020-08-19 06:46:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:28,671 INFO L93 Difference]: Finished difference Result 286 states and 413 transitions. [2020-08-19 06:46:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:46:28,672 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 86 [2020-08-19 06:46:28,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:28,673 INFO L225 Difference]: With dead ends: 286 [2020-08-19 06:46:28,673 INFO L226 Difference]: Without dead ends: 196 [2020-08-19 06:46:28,674 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:28,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-19 06:46:28,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 144. [2020-08-19 06:46:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-08-19 06:46:28,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 207 transitions. [2020-08-19 06:46:28,688 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 207 transitions. Word has length 86 [2020-08-19 06:46:28,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:28,689 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 207 transitions. [2020-08-19 06:46:28,689 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:46:28,689 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 207 transitions. [2020-08-19 06:46:28,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-19 06:46:28,690 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:28,690 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:28,691 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-19 06:46:28,691 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:28,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:28,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1373715738, now seen corresponding path program 12 times [2020-08-19 06:46:28,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:28,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068273259] [2020-08-19 06:46:28,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:28,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,734 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:28,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-08-19 06:46:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-19 06:46:28,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 4 proven. 230 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:28,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068273259] [2020-08-19 06:46:28,962 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:28,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-19 06:46:28,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147613015] [2020-08-19 06:46:28,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-19 06:46:28,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:28,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-19 06:46:28,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=121, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:28,964 INFO L87 Difference]: Start difference. First operand 144 states and 207 transitions. Second operand 16 states. [2020-08-19 06:46:29,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:29,213 INFO L93 Difference]: Finished difference Result 346 states and 475 transitions. [2020-08-19 06:46:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-19 06:46:29,213 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 87 [2020-08-19 06:46:29,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:29,215 INFO L225 Difference]: With dead ends: 346 [2020-08-19 06:46:29,215 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:46:29,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:29,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:46:29,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 149. [2020-08-19 06:46:29,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:29,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 214 transitions. [2020-08-19 06:46:29,231 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 214 transitions. Word has length 87 [2020-08-19 06:46:29,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:29,232 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 214 transitions. [2020-08-19 06:46:29,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-19 06:46:29,232 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 214 transitions. [2020-08-19 06:46:29,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-19 06:46:29,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:29,233 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:29,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-19 06:46:29,234 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:29,234 INFO L82 PathProgramCache]: Analyzing trace with hash -475517563, now seen corresponding path program 12 times [2020-08-19 06:46:29,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:29,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976396868] [2020-08-19 06:46:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:29,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:29,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:29,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,280 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:46:29,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 06:46:29,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976396868] [2020-08-19 06:46:29,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:29,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-08-19 06:46:29,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87795689] [2020-08-19 06:46:29,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-08-19 06:46:29,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:29,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-08-19 06:46:29,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:46:29,303 INFO L87 Difference]: Start difference. First operand 149 states and 214 transitions. Second operand 3 states. [2020-08-19 06:46:29,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:29,317 INFO L93 Difference]: Finished difference Result 160 states and 227 transitions. [2020-08-19 06:46:29,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-19 06:46:29,319 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2020-08-19 06:46:29,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:29,320 INFO L225 Difference]: With dead ends: 160 [2020-08-19 06:46:29,320 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 06:46:29,321 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-08-19 06:46:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 06:46:29,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 06:46:29,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:29,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 213 transitions. [2020-08-19 06:46:29,336 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 213 transitions. Word has length 89 [2020-08-19 06:46:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:29,336 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 213 transitions. [2020-08-19 06:46:29,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-08-19 06:46:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 213 transitions. [2020-08-19 06:46:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:46:29,337 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:29,338 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:29,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-19 06:46:29,338 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:29,338 INFO L82 PathProgramCache]: Analyzing trace with hash -472997077, now seen corresponding path program 1 times [2020-08-19 06:46:29,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:29,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178336019] [2020-08-19 06:46:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:29,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:29,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:29,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:29,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:29,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:29,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:29,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,417 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2020-08-19 06:46:29,418 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178336019] [2020-08-19 06:46:29,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:29,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-19 06:46:29,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121607423] [2020-08-19 06:46:29,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-19 06:46:29,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:29,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-19 06:46:29,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-19 06:46:29,420 INFO L87 Difference]: Start difference. First operand 149 states and 213 transitions. Second operand 4 states. [2020-08-19 06:46:29,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:29,450 INFO L93 Difference]: Finished difference Result 161 states and 227 transitions. [2020-08-19 06:46:29,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-19 06:46:29,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 91 [2020-08-19 06:46:29,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:29,454 INFO L225 Difference]: With dead ends: 161 [2020-08-19 06:46:29,454 INFO L226 Difference]: Without dead ends: 149 [2020-08-19 06:46:29,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:29,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-08-19 06:46:29,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2020-08-19 06:46:29,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-08-19 06:46:29,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 212 transitions. [2020-08-19 06:46:29,469 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 212 transitions. Word has length 91 [2020-08-19 06:46:29,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:29,470 INFO L479 AbstractCegarLoop]: Abstraction has 149 states and 212 transitions. [2020-08-19 06:46:29,470 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-19 06:46:29,470 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 212 transitions. [2020-08-19 06:46:29,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-19 06:46:29,472 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:29,472 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 12, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:29,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-19 06:46:29,473 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:29,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:29,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1494065431, now seen corresponding path program 1 times [2020-08-19 06:46:29,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:29,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136644973] [2020-08-19 06:46:29,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:29,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:29,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:29,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-08-19 06:46:29,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:29,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,851 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:29,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 4 proven. 242 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:29,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136644973] [2020-08-19 06:46:29,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:29,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:46:29,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151614482] [2020-08-19 06:46:29,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:46:29,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:29,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:46:29,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:29,871 INFO L87 Difference]: Start difference. First operand 149 states and 212 transitions. Second operand 17 states. [2020-08-19 06:46:30,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:30,511 INFO L93 Difference]: Finished difference Result 298 states and 427 transitions. [2020-08-19 06:46:30,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:46:30,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 91 [2020-08-19 06:46:30,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:30,515 INFO L225 Difference]: With dead ends: 298 [2020-08-19 06:46:30,516 INFO L226 Difference]: Without dead ends: 205 [2020-08-19 06:46:30,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:30,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-08-19 06:46:30,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2020-08-19 06:46:30,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-08-19 06:46:30,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 214 transitions. [2020-08-19 06:46:30,533 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 214 transitions. Word has length 91 [2020-08-19 06:46:30,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:30,533 INFO L479 AbstractCegarLoop]: Abstraction has 150 states and 214 transitions. [2020-08-19 06:46:30,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:46:30,533 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 214 transitions. [2020-08-19 06:46:30,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-19 06:46:30,534 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:30,535 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:30,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-19 06:46:30,535 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:30,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:30,535 INFO L82 PathProgramCache]: Analyzing trace with hash -1215060069, now seen corresponding path program 1 times [2020-08-19 06:46:30,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:30,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [965542438] [2020-08-19 06:46:30,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:30,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,794 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-19 06:46:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,797 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2020-08-19 06:46:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 06:46:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:30,815 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 4 proven. 268 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:30,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [965542438] [2020-08-19 06:46:30,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:30,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-19 06:46:30,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068216925] [2020-08-19 06:46:30,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-19 06:46:30,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:30,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-19 06:46:30,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=137, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:46:30,820 INFO L87 Difference]: Start difference. First operand 150 states and 214 transitions. Second operand 17 states. [2020-08-19 06:46:31,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:31,046 INFO L93 Difference]: Finished difference Result 363 states and 494 transitions. [2020-08-19 06:46:31,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-19 06:46:31,047 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 92 [2020-08-19 06:46:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:31,049 INFO L225 Difference]: With dead ends: 363 [2020-08-19 06:46:31,049 INFO L226 Difference]: Without dead ends: 264 [2020-08-19 06:46:31,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-08-19 06:46:31,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 155. [2020-08-19 06:46:31,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-08-19 06:46:31,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 221 transitions. [2020-08-19 06:46:31,064 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 221 transitions. Word has length 92 [2020-08-19 06:46:31,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:31,064 INFO L479 AbstractCegarLoop]: Abstraction has 155 states and 221 transitions. [2020-08-19 06:46:31,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-19 06:46:31,065 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 221 transitions. [2020-08-19 06:46:31,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-19 06:46:31,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:31,066 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 13, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:31,066 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-19 06:46:31,067 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:31,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:31,067 INFO L82 PathProgramCache]: Analyzing trace with hash 1005143610, now seen corresponding path program 2 times [2020-08-19 06:46:31,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:31,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739861371] [2020-08-19 06:46:31,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:31,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:31,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,106 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:31,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:31,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-19 06:46:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:31,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 06:46:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:31,457 INFO L134 CoverageAnalysis]: Checked inductivity of 303 backedges. 4 proven. 281 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:31,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739861371] [2020-08-19 06:46:31,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:31,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:46:31,458 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980849944] [2020-08-19 06:46:31,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:46:31,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:31,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:46:31,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:31,460 INFO L87 Difference]: Start difference. First operand 155 states and 221 transitions. Second operand 18 states. [2020-08-19 06:46:32,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:32,100 INFO L93 Difference]: Finished difference Result 310 states and 445 transitions. [2020-08-19 06:46:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:46:32,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 94 [2020-08-19 06:46:32,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:32,102 INFO L225 Difference]: With dead ends: 310 [2020-08-19 06:46:32,102 INFO L226 Difference]: Without dead ends: 214 [2020-08-19 06:46:32,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:32,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-08-19 06:46:32,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 156. [2020-08-19 06:46:32,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-08-19 06:46:32,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 223 transitions. [2020-08-19 06:46:32,118 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 223 transitions. Word has length 94 [2020-08-19 06:46:32,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:32,118 INFO L479 AbstractCegarLoop]: Abstraction has 156 states and 223 transitions. [2020-08-19 06:46:32,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:46:32,118 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 223 transitions. [2020-08-19 06:46:32,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-08-19 06:46:32,120 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:32,120 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:32,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-19 06:46:32,120 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:32,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:32,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1048991126, now seen corresponding path program 2 times [2020-08-19 06:46:32,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:32,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806539086] [2020-08-19 06:46:32,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:32,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,151 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,154 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,407 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-08-19 06:46:32,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-19 06:46:32,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:46:32,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 4 proven. 309 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:32,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806539086] [2020-08-19 06:46:32,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:32,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-19 06:46:32,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041921863] [2020-08-19 06:46:32,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-19 06:46:32,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:32,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-19 06:46:32,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=154, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:32,439 INFO L87 Difference]: Start difference. First operand 156 states and 223 transitions. Second operand 18 states. [2020-08-19 06:46:32,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:32,636 INFO L93 Difference]: Finished difference Result 380 states and 517 transitions. [2020-08-19 06:46:32,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-19 06:46:32,637 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 95 [2020-08-19 06:46:32,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:32,639 INFO L225 Difference]: With dead ends: 380 [2020-08-19 06:46:32,639 INFO L226 Difference]: Without dead ends: 278 [2020-08-19 06:46:32,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:32,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-08-19 06:46:32,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 161. [2020-08-19 06:46:32,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-08-19 06:46:32,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 230 transitions. [2020-08-19 06:46:32,657 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 230 transitions. Word has length 95 [2020-08-19 06:46:32,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:32,658 INFO L479 AbstractCegarLoop]: Abstraction has 161 states and 230 transitions. [2020-08-19 06:46:32,658 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-19 06:46:32,658 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 230 transitions. [2020-08-19 06:46:32,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-08-19 06:46:32,659 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:32,660 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 14, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:32,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-19 06:46:32,660 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:32,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:32,660 INFO L82 PathProgramCache]: Analyzing trace with hash 1683607881, now seen corresponding path program 3 times [2020-08-19 06:46:32,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:32,661 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525409319] [2020-08-19 06:46:32,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:32,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,708 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:32,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:32,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:32,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-08-19 06:46:33,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:33,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:46:33,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 4 proven. 323 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:33,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525409319] [2020-08-19 06:46:33,116 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:33,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:46:33,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222550691] [2020-08-19 06:46:33,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:46:33,117 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:33,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:46:33,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:33,117 INFO L87 Difference]: Start difference. First operand 161 states and 230 transitions. Second operand 19 states. [2020-08-19 06:46:33,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:33,830 INFO L93 Difference]: Finished difference Result 322 states and 463 transitions. [2020-08-19 06:46:33,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:46:33,837 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 97 [2020-08-19 06:46:33,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:33,843 INFO L225 Difference]: With dead ends: 322 [2020-08-19 06:46:33,843 INFO L226 Difference]: Without dead ends: 223 [2020-08-19 06:46:33,844 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 [2020-08-19 06:46:33,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-08-19 06:46:33,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-08-19 06:46:33,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-08-19 06:46:33,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 232 transitions. [2020-08-19 06:46:33,862 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 232 transitions. Word has length 97 [2020-08-19 06:46:33,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:33,863 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 232 transitions. [2020-08-19 06:46:33,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:46:33,863 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 232 transitions. [2020-08-19 06:46:33,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-19 06:46:33,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:33,864 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:33,865 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-19 06:46:33,865 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:33,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:33,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1491435205, now seen corresponding path program 3 times [2020-08-19 06:46:33,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:33,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521356748] [2020-08-19 06:46:33,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:33,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:33,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:33,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:33,896 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:33,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-19 06:46:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,181 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-08-19 06:46:34,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 06:46:34,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 375 backedges. 4 proven. 353 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:34,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521356748] [2020-08-19 06:46:34,200 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:34,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-19 06:46:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890290954] [2020-08-19 06:46:34,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-19 06:46:34,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-19 06:46:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=172, Unknown=0, NotChecked=0, Total=342 [2020-08-19 06:46:34,202 INFO L87 Difference]: Start difference. First operand 162 states and 232 transitions. Second operand 19 states. [2020-08-19 06:46:34,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:34,461 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2020-08-19 06:46:34,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-19 06:46:34,462 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 98 [2020-08-19 06:46:34,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:34,464 INFO L225 Difference]: With dead ends: 397 [2020-08-19 06:46:34,464 INFO L226 Difference]: Without dead ends: 292 [2020-08-19 06:46:34,466 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:34,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-08-19 06:46:34,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 167. [2020-08-19 06:46:34,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-08-19 06:46:34,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 239 transitions. [2020-08-19 06:46:34,480 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 239 transitions. Word has length 98 [2020-08-19 06:46:34,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:34,480 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 239 transitions. [2020-08-19 06:46:34,480 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-19 06:46:34,480 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 239 transitions. [2020-08-19 06:46:34,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-19 06:46:34,481 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:34,482 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:34,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-19 06:46:34,482 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:34,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:34,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1696610266, now seen corresponding path program 4 times [2020-08-19 06:46:34,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:34,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544954732] [2020-08-19 06:46:34,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:34,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:34,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:34,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:34,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-19 06:46:34,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 06:46:34,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 06:46:34,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 4 proven. 368 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:34,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1544954732] [2020-08-19 06:46:34,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:34,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 06:46:34,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528858786] [2020-08-19 06:46:34,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 06:46:34,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:34,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 06:46:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:34,963 INFO L87 Difference]: Start difference. First operand 167 states and 239 transitions. Second operand 20 states. [2020-08-19 06:46:35,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:35,702 INFO L93 Difference]: Finished difference Result 334 states and 481 transitions. [2020-08-19 06:46:35,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:46:35,703 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 100 [2020-08-19 06:46:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:35,705 INFO L225 Difference]: With dead ends: 334 [2020-08-19 06:46:35,705 INFO L226 Difference]: Without dead ends: 232 [2020-08-19 06:46:35,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-08-19 06:46:35,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 168. [2020-08-19 06:46:35,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-08-19 06:46:35,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 241 transitions. [2020-08-19 06:46:35,719 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 241 transitions. Word has length 100 [2020-08-19 06:46:35,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:35,720 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 241 transitions. [2020-08-19 06:46:35,720 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 06:46:35,720 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 241 transitions. [2020-08-19 06:46:35,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-08-19 06:46:35,721 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:35,721 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:35,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-19 06:46:35,722 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:35,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:35,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1088361270, now seen corresponding path program 4 times [2020-08-19 06:46:35,722 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:35,722 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656164718] [2020-08-19 06:46:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:35,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:35,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:35,752 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2020-08-19 06:46:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-19 06:46:36,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:46:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,060 INFO L134 CoverageAnalysis]: Checked inductivity of 422 backedges. 4 proven. 400 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:36,061 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656164718] [2020-08-19 06:46:36,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:36,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-19 06:46:36,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373267466] [2020-08-19 06:46:36,061 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-19 06:46:36,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:36,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-19 06:46:36,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=191, Unknown=0, NotChecked=0, Total=380 [2020-08-19 06:46:36,062 INFO L87 Difference]: Start difference. First operand 168 states and 241 transitions. Second operand 20 states. [2020-08-19 06:46:36,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:36,390 INFO L93 Difference]: Finished difference Result 414 states and 563 transitions. [2020-08-19 06:46:36,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-19 06:46:36,391 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 101 [2020-08-19 06:46:36,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:36,393 INFO L225 Difference]: With dead ends: 414 [2020-08-19 06:46:36,393 INFO L226 Difference]: Without dead ends: 306 [2020-08-19 06:46:36,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:36,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-08-19 06:46:36,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 173. [2020-08-19 06:46:36,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-08-19 06:46:36,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 248 transitions. [2020-08-19 06:46:36,409 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 248 transitions. Word has length 101 [2020-08-19 06:46:36,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:36,410 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 248 transitions. [2020-08-19 06:46:36,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-19 06:46:36,410 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 248 transitions. [2020-08-19 06:46:36,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-08-19 06:46:36,411 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:36,411 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:36,411 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-19 06:46:36,412 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:36,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1791362135, now seen corresponding path program 5 times [2020-08-19 06:46:36,412 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:36,413 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1272304679] [2020-08-19 06:46:36,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:36,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,448 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:36,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2020-08-19 06:46:36,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:46:36,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:46:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:36,986 INFO L134 CoverageAnalysis]: Checked inductivity of 438 backedges. 4 proven. 416 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:36,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1272304679] [2020-08-19 06:46:36,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:36,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:46:36,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818313609] [2020-08-19 06:46:36,988 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:46:36,988 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:36,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:46:36,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:36,988 INFO L87 Difference]: Start difference. First operand 173 states and 248 transitions. Second operand 21 states. [2020-08-19 06:46:37,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:37,775 INFO L93 Difference]: Finished difference Result 346 states and 499 transitions. [2020-08-19 06:46:37,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:46:37,776 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 103 [2020-08-19 06:46:37,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:37,778 INFO L225 Difference]: With dead ends: 346 [2020-08-19 06:46:37,778 INFO L226 Difference]: Without dead ends: 241 [2020-08-19 06:46:37,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:37,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-08-19 06:46:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 174. [2020-08-19 06:46:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-08-19 06:46:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 250 transitions. [2020-08-19 06:46:37,794 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 250 transitions. Word has length 103 [2020-08-19 06:46:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:37,794 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 250 transitions. [2020-08-19 06:46:37,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:46:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 250 transitions. [2020-08-19 06:46:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-08-19 06:46:37,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:37,796 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:37,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-19 06:46:37,796 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:37,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:37,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1841323301, now seen corresponding path program 5 times [2020-08-19 06:46:37,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:37,797 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108036917] [2020-08-19 06:46:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:37,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:37,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:37,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:37,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:37,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,148 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-19 06:46:38,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-08-19 06:46:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 06:46:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,177 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 4 proven. 450 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:38,177 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108036917] [2020-08-19 06:46:38,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:38,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-19 06:46:38,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [866594537] [2020-08-19 06:46:38,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-19 06:46:38,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:38,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-19 06:46:38,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=211, Unknown=0, NotChecked=0, Total=420 [2020-08-19 06:46:38,182 INFO L87 Difference]: Start difference. First operand 174 states and 250 transitions. Second operand 21 states. [2020-08-19 06:46:38,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:38,522 INFO L93 Difference]: Finished difference Result 431 states and 586 transitions. [2020-08-19 06:46:38,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-19 06:46:38,522 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 104 [2020-08-19 06:46:38,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:38,525 INFO L225 Difference]: With dead ends: 431 [2020-08-19 06:46:38,525 INFO L226 Difference]: Without dead ends: 320 [2020-08-19 06:46:38,526 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-08-19 06:46:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 179. [2020-08-19 06:46:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-08-19 06:46:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 257 transitions. [2020-08-19 06:46:38,545 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 257 transitions. Word has length 104 [2020-08-19 06:46:38,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:38,545 INFO L479 AbstractCegarLoop]: Abstraction has 179 states and 257 transitions. [2020-08-19 06:46:38,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-19 06:46:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 257 transitions. [2020-08-19 06:46:38,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-08-19 06:46:38,547 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:38,547 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:38,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-19 06:46:38,547 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:38,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:38,548 INFO L82 PathProgramCache]: Analyzing trace with hash 461599098, now seen corresponding path program 6 times [2020-08-19 06:46:38,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:38,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1740874412] [2020-08-19 06:46:38,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:38,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:38,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-19 06:46:39,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 06:46:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:46:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,097 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 4 proven. 467 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:39,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1740874412] [2020-08-19 06:46:39,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:39,098 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:46:39,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270525777] [2020-08-19 06:46:39,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:46:39,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:39,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:46:39,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=385, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:39,099 INFO L87 Difference]: Start difference. First operand 179 states and 257 transitions. Second operand 22 states. [2020-08-19 06:46:39,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:39,911 INFO L93 Difference]: Finished difference Result 358 states and 517 transitions. [2020-08-19 06:46:39,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 06:46:39,914 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 106 [2020-08-19 06:46:39,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:39,916 INFO L225 Difference]: With dead ends: 358 [2020-08-19 06:46:39,916 INFO L226 Difference]: Without dead ends: 250 [2020-08-19 06:46:39,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:39,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-08-19 06:46:39,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 180. [2020-08-19 06:46:39,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-08-19 06:46:39,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 259 transitions. [2020-08-19 06:46:39,932 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 259 transitions. Word has length 106 [2020-08-19 06:46:39,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:39,932 INFO L479 AbstractCegarLoop]: Abstraction has 180 states and 259 transitions. [2020-08-19 06:46:39,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:46:39,932 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 259 transitions. [2020-08-19 06:46:39,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-08-19 06:46:39,933 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:39,934 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:39,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-19 06:46:39,934 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:39,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:39,934 INFO L82 PathProgramCache]: Analyzing trace with hash -719001814, now seen corresponding path program 6 times [2020-08-19 06:46:39,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:39,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875703648] [2020-08-19 06:46:39,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:39,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:39,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:39,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:39,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:39,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2020-08-19 06:46:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2020-08-19 06:46:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:40,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,330 INFO L134 CoverageAnalysis]: Checked inductivity of 525 backedges. 4 proven. 503 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:40,330 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875703648] [2020-08-19 06:46:40,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:40,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-19 06:46:40,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55069507] [2020-08-19 06:46:40,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-19 06:46:40,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:40,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-19 06:46:40,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=232, Unknown=0, NotChecked=0, Total=462 [2020-08-19 06:46:40,332 INFO L87 Difference]: Start difference. First operand 180 states and 259 transitions. Second operand 22 states. [2020-08-19 06:46:40,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:40,580 INFO L93 Difference]: Finished difference Result 448 states and 609 transitions. [2020-08-19 06:46:40,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-19 06:46:40,581 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-08-19 06:46:40,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:40,584 INFO L225 Difference]: With dead ends: 448 [2020-08-19 06:46:40,584 INFO L226 Difference]: Without dead ends: 334 [2020-08-19 06:46:40,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-19 06:46:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 185. [2020-08-19 06:46:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 185 states. [2020-08-19 06:46:40,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 266 transitions. [2020-08-19 06:46:40,601 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 266 transitions. Word has length 107 [2020-08-19 06:46:40,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:40,601 INFO L479 AbstractCegarLoop]: Abstraction has 185 states and 266 transitions. [2020-08-19 06:46:40,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-19 06:46:40,601 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 266 transitions. [2020-08-19 06:46:40,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-08-19 06:46:40,602 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:40,603 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 18, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:40,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-19 06:46:40,603 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:40,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:40,603 INFO L82 PathProgramCache]: Analyzing trace with hash 975756809, now seen corresponding path program 7 times [2020-08-19 06:46:40,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:40,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68508105] [2020-08-19 06:46:40,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:40,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:40,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:40,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:40,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2020-08-19 06:46:41,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:46:41,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:46:41,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:41,195 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 4 proven. 521 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:41,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68508105] [2020-08-19 06:46:41,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:41,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:46:41,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290076609] [2020-08-19 06:46:41,196 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:46:41,196 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:41,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:46:41,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:41,197 INFO L87 Difference]: Start difference. First operand 185 states and 266 transitions. Second operand 23 states. [2020-08-19 06:46:42,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:42,208 INFO L93 Difference]: Finished difference Result 370 states and 535 transitions. [2020-08-19 06:46:42,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:46:42,209 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 109 [2020-08-19 06:46:42,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:42,211 INFO L225 Difference]: With dead ends: 370 [2020-08-19 06:46:42,211 INFO L226 Difference]: Without dead ends: 259 [2020-08-19 06:46:42,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:42,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-08-19 06:46:42,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 186. [2020-08-19 06:46:42,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-08-19 06:46:42,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 268 transitions. [2020-08-19 06:46:42,237 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 268 transitions. Word has length 109 [2020-08-19 06:46:42,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:42,237 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 268 transitions. [2020-08-19 06:46:42,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:46:42,237 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 268 transitions. [2020-08-19 06:46:42,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2020-08-19 06:46:42,238 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:42,239 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:42,239 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-19 06:46:42,239 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:42,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:42,239 INFO L82 PathProgramCache]: Analyzing trace with hash -1959981957, now seen corresponding path program 7 times [2020-08-19 06:46:42,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:42,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819470065] [2020-08-19 06:46:42,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:42,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:42,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-19 06:46:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-08-19 06:46:42,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2020-08-19 06:46:42,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:42,677 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 4 proven. 559 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:42,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819470065] [2020-08-19 06:46:42,678 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:42,678 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-19 06:46:42,678 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466925264] [2020-08-19 06:46:42,679 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-19 06:46:42,679 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:42,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-19 06:46:42,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=254, Unknown=0, NotChecked=0, Total=506 [2020-08-19 06:46:42,680 INFO L87 Difference]: Start difference. First operand 186 states and 268 transitions. Second operand 23 states. [2020-08-19 06:46:43,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:43,107 INFO L93 Difference]: Finished difference Result 465 states and 632 transitions. [2020-08-19 06:46:43,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-19 06:46:43,107 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 110 [2020-08-19 06:46:43,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:43,109 INFO L225 Difference]: With dead ends: 465 [2020-08-19 06:46:43,110 INFO L226 Difference]: Without dead ends: 348 [2020-08-19 06:46:43,111 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:43,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-08-19 06:46:43,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 191. [2020-08-19 06:46:43,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-08-19 06:46:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 275 transitions. [2020-08-19 06:46:43,132 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 275 transitions. Word has length 110 [2020-08-19 06:46:43,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:43,132 INFO L479 AbstractCegarLoop]: Abstraction has 191 states and 275 transitions. [2020-08-19 06:46:43,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-19 06:46:43,132 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 275 transitions. [2020-08-19 06:46:43,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-08-19 06:46:43,134 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:43,134 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:43,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-19 06:46:43,135 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1900219622, now seen corresponding path program 8 times [2020-08-19 06:46:43,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:43,135 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1204850525] [2020-08-19 06:46:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:43,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:43,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:43,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-19 06:46:43,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 06:46:43,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 06:46:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:43,793 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 4 proven. 578 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:43,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1204850525] [2020-08-19 06:46:43,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:43,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 06:46:43,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156763212] [2020-08-19 06:46:43,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 06:46:43,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:43,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 06:46:43,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:43,798 INFO L87 Difference]: Start difference. First operand 191 states and 275 transitions. Second operand 24 states. [2020-08-19 06:46:44,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:44,948 INFO L93 Difference]: Finished difference Result 382 states and 553 transitions. [2020-08-19 06:46:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 06:46:44,951 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 112 [2020-08-19 06:46:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:44,953 INFO L225 Difference]: With dead ends: 382 [2020-08-19 06:46:44,953 INFO L226 Difference]: Without dead ends: 268 [2020-08-19 06:46:44,956 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:44,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-08-19 06:46:44,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 192. [2020-08-19 06:46:44,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-08-19 06:46:44,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 277 transitions. [2020-08-19 06:46:44,973 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 277 transitions. Word has length 112 [2020-08-19 06:46:44,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:44,974 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 277 transitions. [2020-08-19 06:46:44,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 06:46:44,974 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 277 transitions. [2020-08-19 06:46:44,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-08-19 06:46:44,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:44,975 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:44,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-08-19 06:46:44,976 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:44,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:44,976 INFO L82 PathProgramCache]: Analyzing trace with hash -920938102, now seen corresponding path program 8 times [2020-08-19 06:46:44,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:44,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632899170] [2020-08-19 06:46:44,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:44,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:45,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-08-19 06:46:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,533 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-08-19 06:46:45,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2020-08-19 06:46:45,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 640 backedges. 4 proven. 618 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:45,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632899170] [2020-08-19 06:46:45,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:45,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-19 06:46:45,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139447547] [2020-08-19 06:46:45,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-19 06:46:45,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:45,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-19 06:46:45,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=275, Invalid=277, Unknown=0, NotChecked=0, Total=552 [2020-08-19 06:46:45,568 INFO L87 Difference]: Start difference. First operand 192 states and 277 transitions. Second operand 24 states. [2020-08-19 06:46:45,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:46,000 INFO L93 Difference]: Finished difference Result 482 states and 655 transitions. [2020-08-19 06:46:46,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-19 06:46:46,001 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 113 [2020-08-19 06:46:46,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:46,003 INFO L225 Difference]: With dead ends: 482 [2020-08-19 06:46:46,004 INFO L226 Difference]: Without dead ends: 362 [2020-08-19 06:46:46,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:46,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-08-19 06:46:46,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 197. [2020-08-19 06:46:46,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-08-19 06:46:46,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 284 transitions. [2020-08-19 06:46:46,030 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 284 transitions. Word has length 113 [2020-08-19 06:46:46,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:46,030 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 284 transitions. [2020-08-19 06:46:46,030 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-19 06:46:46,030 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 284 transitions. [2020-08-19 06:46:46,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-08-19 06:46:46,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:46,032 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:46,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-08-19 06:46:46,032 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:46,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:46,033 INFO L82 PathProgramCache]: Analyzing trace with hash 188512361, now seen corresponding path program 9 times [2020-08-19 06:46:46,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:46,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810527336] [2020-08-19 06:46:46,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:46,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:46,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:46,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:46,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-08-19 06:46:46,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:46:46,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2020-08-19 06:46:46,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:46,706 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 4 proven. 638 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:46,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810527336] [2020-08-19 06:46:46,707 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:46,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:46:46,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781258290] [2020-08-19 06:46:46,708 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:46:46,708 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:46,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:46:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:46,708 INFO L87 Difference]: Start difference. First operand 197 states and 284 transitions. Second operand 25 states. [2020-08-19 06:46:47,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:47,962 INFO L93 Difference]: Finished difference Result 394 states and 571 transitions. [2020-08-19 06:46:47,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:46:47,964 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 115 [2020-08-19 06:46:47,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:47,965 INFO L225 Difference]: With dead ends: 394 [2020-08-19 06:46:47,965 INFO L226 Difference]: Without dead ends: 277 [2020-08-19 06:46:47,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:47,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2020-08-19 06:46:47,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 198. [2020-08-19 06:46:47,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-08-19 06:46:47,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 286 transitions. [2020-08-19 06:46:47,984 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 286 transitions. Word has length 115 [2020-08-19 06:46:47,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:47,984 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 286 transitions. [2020-08-19 06:46:47,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:46:47,984 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 286 transitions. [2020-08-19 06:46:47,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-08-19 06:46:47,985 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:47,986 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:47,986 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-08-19 06:46:47,986 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:47,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:47,986 INFO L82 PathProgramCache]: Analyzing trace with hash -594756069, now seen corresponding path program 9 times [2020-08-19 06:46:47,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:47,987 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183512427] [2020-08-19 06:46:47,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:48,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:48,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:48,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2020-08-19 06:46:48,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-08-19 06:46:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2020-08-19 06:46:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,477 INFO L134 CoverageAnalysis]: Checked inductivity of 702 backedges. 4 proven. 680 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:48,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183512427] [2020-08-19 06:46:48,478 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:48,478 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-19 06:46:48,478 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054321753] [2020-08-19 06:46:48,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-19 06:46:48,479 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:48,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-19 06:46:48,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=301, Unknown=0, NotChecked=0, Total=600 [2020-08-19 06:46:48,480 INFO L87 Difference]: Start difference. First operand 198 states and 286 transitions. Second operand 25 states. [2020-08-19 06:46:48,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:48,821 INFO L93 Difference]: Finished difference Result 499 states and 678 transitions. [2020-08-19 06:46:48,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-19 06:46:48,821 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-08-19 06:46:48,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:48,824 INFO L225 Difference]: With dead ends: 499 [2020-08-19 06:46:48,824 INFO L226 Difference]: Without dead ends: 376 [2020-08-19 06:46:48,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:48,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-08-19 06:46:48,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 203. [2020-08-19 06:46:48,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-08-19 06:46:48,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 293 transitions. [2020-08-19 06:46:48,848 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 293 transitions. Word has length 116 [2020-08-19 06:46:48,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:48,849 INFO L479 AbstractCegarLoop]: Abstraction has 203 states and 293 transitions. [2020-08-19 06:46:48,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-19 06:46:48,849 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 293 transitions. [2020-08-19 06:46:48,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2020-08-19 06:46:48,850 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:48,850 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 21, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:48,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-08-19 06:46:48,851 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:48,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:48,851 INFO L82 PathProgramCache]: Analyzing trace with hash 116833466, now seen corresponding path program 10 times [2020-08-19 06:46:48,851 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:48,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741708879] [2020-08-19 06:46:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:48,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,899 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:48,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:48,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:48,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:48,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2020-08-19 06:46:49,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2020-08-19 06:46:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 723 backedges. 4 proven. 701 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:49,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741708879] [2020-08-19 06:46:49,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:49,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:46:49,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547918621] [2020-08-19 06:46:49,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:46:49,612 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:49,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:46:49,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=557, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:49,612 INFO L87 Difference]: Start difference. First operand 203 states and 293 transitions. Second operand 26 states. [2020-08-19 06:46:50,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:50,926 INFO L93 Difference]: Finished difference Result 406 states and 589 transitions. [2020-08-19 06:46:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:46:50,927 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 118 [2020-08-19 06:46:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:50,929 INFO L225 Difference]: With dead ends: 406 [2020-08-19 06:46:50,929 INFO L226 Difference]: Without dead ends: 286 [2020-08-19 06:46:50,930 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:50,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-08-19 06:46:50,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 204. [2020-08-19 06:46:50,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-08-19 06:46:50,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 295 transitions. [2020-08-19 06:46:50,949 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 295 transitions. Word has length 118 [2020-08-19 06:46:50,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:50,950 INFO L479 AbstractCegarLoop]: Abstraction has 204 states and 295 transitions. [2020-08-19 06:46:50,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:46:50,950 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 295 transitions. [2020-08-19 06:46:50,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-08-19 06:46:50,951 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:50,951 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:50,952 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-08-19 06:46:50,952 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:50,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:50,952 INFO L82 PathProgramCache]: Analyzing trace with hash 1478165482, now seen corresponding path program 10 times [2020-08-19 06:46:50,952 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:50,953 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705331791] [2020-08-19 06:46:50,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:50,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:50,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:50,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:50,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2020-08-19 06:46:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-08-19 06:46:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2020-08-19 06:46:51,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 767 backedges. 4 proven. 745 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:51,510 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705331791] [2020-08-19 06:46:51,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:51,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-19 06:46:51,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365608477] [2020-08-19 06:46:51,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-19 06:46:51,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:51,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-19 06:46:51,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=324, Invalid=326, Unknown=0, NotChecked=0, Total=650 [2020-08-19 06:46:51,512 INFO L87 Difference]: Start difference. First operand 204 states and 295 transitions. Second operand 26 states. [2020-08-19 06:46:51,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:51,800 INFO L93 Difference]: Finished difference Result 516 states and 701 transitions. [2020-08-19 06:46:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-19 06:46:51,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 119 [2020-08-19 06:46:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:51,803 INFO L225 Difference]: With dead ends: 516 [2020-08-19 06:46:51,803 INFO L226 Difference]: Without dead ends: 390 [2020-08-19 06:46:51,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:51,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-08-19 06:46:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 209. [2020-08-19 06:46:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 209 states. [2020-08-19 06:46:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 302 transitions. [2020-08-19 06:46:51,823 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 302 transitions. Word has length 119 [2020-08-19 06:46:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:51,824 INFO L479 AbstractCegarLoop]: Abstraction has 209 states and 302 transitions. [2020-08-19 06:46:51,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-19 06:46:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 302 transitions. [2020-08-19 06:46:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-08-19 06:46:51,825 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:51,825 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 22, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:51,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-08-19 06:46:51,825 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:51,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:51,826 INFO L82 PathProgramCache]: Analyzing trace with hash -670381367, now seen corresponding path program 11 times [2020-08-19 06:46:51,826 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:51,826 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659180743] [2020-08-19 06:46:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:51,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:51,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,858 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:51,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:51,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2020-08-19 06:46:52,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:46:52,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2020-08-19 06:46:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 4 proven. 767 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:52,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659180743] [2020-08-19 06:46:52,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:52,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:46:52,606 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167051703] [2020-08-19 06:46:52,606 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:46:52,606 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:52,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:46:52,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=605, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:52,607 INFO L87 Difference]: Start difference. First operand 209 states and 302 transitions. Second operand 27 states. [2020-08-19 06:46:54,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:54,060 INFO L93 Difference]: Finished difference Result 418 states and 607 transitions. [2020-08-19 06:46:54,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:46:54,060 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 121 [2020-08-19 06:46:54,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:54,062 INFO L225 Difference]: With dead ends: 418 [2020-08-19 06:46:54,062 INFO L226 Difference]: Without dead ends: 295 [2020-08-19 06:46:54,063 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:46:54,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2020-08-19 06:46:54,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 210. [2020-08-19 06:46:54,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-08-19 06:46:54,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 304 transitions. [2020-08-19 06:46:54,081 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 304 transitions. Word has length 121 [2020-08-19 06:46:54,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:54,082 INFO L479 AbstractCegarLoop]: Abstraction has 210 states and 304 transitions. [2020-08-19 06:46:54,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:46:54,082 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 304 transitions. [2020-08-19 06:46:54,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-08-19 06:46:54,083 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:54,083 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:54,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-08-19 06:46:54,084 INFO L427 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:54,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:54,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1450657861, now seen corresponding path program 11 times [2020-08-19 06:46:54,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:54,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626976497] [2020-08-19 06:46:54,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:54,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:54,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:54,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2020-08-19 06:46:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2020-08-19 06:46:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2020-08-19 06:46:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:54,648 INFO L134 CoverageAnalysis]: Checked inductivity of 835 backedges. 4 proven. 813 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-08-19 06:46:54,648 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626976497] [2020-08-19 06:46:54,648 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:54,649 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-19 06:46:54,649 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075377742] [2020-08-19 06:46:54,649 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-19 06:46:54,649 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:54,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-19 06:46:54,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=350, Invalid=352, Unknown=0, NotChecked=0, Total=702 [2020-08-19 06:46:54,650 INFO L87 Difference]: Start difference. First operand 210 states and 304 transitions. Second operand 27 states. [2020-08-19 06:46:55,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:55,108 INFO L93 Difference]: Finished difference Result 533 states and 724 transitions. [2020-08-19 06:46:55,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-19 06:46:55,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 122 [2020-08-19 06:46:55,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:55,111 INFO L225 Difference]: With dead ends: 533 [2020-08-19 06:46:55,111 INFO L226 Difference]: Without dead ends: 404 [2020-08-19 06:46:55,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=377, Invalid=379, Unknown=0, NotChecked=0, Total=756 [2020-08-19 06:46:55,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-08-19 06:46:55,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 215. [2020-08-19 06:46:55,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-08-19 06:46:55,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 311 transitions. [2020-08-19 06:46:55,136 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 311 transitions. Word has length 122 [2020-08-19 06:46:55,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:55,136 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 311 transitions. [2020-08-19 06:46:55,136 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-19 06:46:55,136 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 311 transitions. [2020-08-19 06:46:55,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 06:46:55,137 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:55,138 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:55,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-08-19 06:46:55,138 INFO L427 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:55,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:55,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2066035110, now seen corresponding path program 12 times [2020-08-19 06:46:55,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:55,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [241884020] [2020-08-19 06:46:55,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:55,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,228 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:55,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:55,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:55,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:55,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,320 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 06:46:55,321 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [241884020] [2020-08-19 06:46:55,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:55,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-08-19 06:46:55,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599678580] [2020-08-19 06:46:55,322 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:55,322 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:55,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:55,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:55,322 INFO L87 Difference]: Start difference. First operand 215 states and 311 transitions. Second operand 10 states. [2020-08-19 06:46:55,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:55,586 INFO L93 Difference]: Finished difference Result 271 states and 393 transitions. [2020-08-19 06:46:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:55,587 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 06:46:55,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:55,589 INFO L225 Difference]: With dead ends: 271 [2020-08-19 06:46:55,590 INFO L226 Difference]: Without dead ends: 261 [2020-08-19 06:46:55,590 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:55,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2020-08-19 06:46:55,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 241. [2020-08-19 06:46:55,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-08-19 06:46:55,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 355 transitions. [2020-08-19 06:46:55,622 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 355 transitions. Word has length 124 [2020-08-19 06:46:55,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:55,623 INFO L479 AbstractCegarLoop]: Abstraction has 241 states and 355 transitions. [2020-08-19 06:46:55,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:55,624 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 355 transitions. [2020-08-19 06:46:55,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2020-08-19 06:46:55,625 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:55,625 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:55,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-08-19 06:46:55,626 INFO L427 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:55,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:55,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1807869672, now seen corresponding path program 1 times [2020-08-19 06:46:55,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:55,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1588346449] [2020-08-19 06:46:55,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,815 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:55,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,852 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:55,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:55,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:55,931 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:55,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1588346449] [2020-08-19 06:46:55,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:55,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:55,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707867122] [2020-08-19 06:46:55,936 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:55,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:55,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:55,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:55,936 INFO L87 Difference]: Start difference. First operand 241 states and 355 transitions. Second operand 10 states. [2020-08-19 06:46:56,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:56,178 INFO L93 Difference]: Finished difference Result 285 states and 429 transitions. [2020-08-19 06:46:56,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:56,180 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 124 [2020-08-19 06:46:56,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:56,182 INFO L225 Difference]: With dead ends: 285 [2020-08-19 06:46:56,183 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 06:46:56,185 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=149, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:56,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 06:46:56,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 265. [2020-08-19 06:46:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 06:46:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 402 transitions. [2020-08-19 06:46:56,220 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 402 transitions. Word has length 124 [2020-08-19 06:46:56,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:56,221 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 402 transitions. [2020-08-19 06:46:56,221 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:46:56,221 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 402 transitions. [2020-08-19 06:46:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 06:46:56,223 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:56,223 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:56,224 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-08-19 06:46:56,224 INFO L427 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:56,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:56,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1864277052, now seen corresponding path program 1 times [2020-08-19 06:46:56,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:56,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569241381] [2020-08-19 06:46:56,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:56,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:56,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:56,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:56,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,326 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,338 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 858 trivial. 0 not checked. [2020-08-19 06:46:56,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569241381] [2020-08-19 06:46:56,339 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:56,339 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-19 06:46:56,340 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225324695] [2020-08-19 06:46:56,340 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-19 06:46:56,340 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:56,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-19 06:46:56,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-19 06:46:56,341 INFO L87 Difference]: Start difference. First operand 265 states and 402 transitions. Second operand 6 states. [2020-08-19 06:46:56,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:56,400 INFO L93 Difference]: Finished difference Result 271 states and 407 transitions. [2020-08-19 06:46:56,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-19 06:46:56,401 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 126 [2020-08-19 06:46:56,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:56,403 INFO L225 Difference]: With dead ends: 271 [2020-08-19 06:46:56,404 INFO L226 Difference]: Without dead ends: 265 [2020-08-19 06:46:56,404 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:56,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-19 06:46:56,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2020-08-19 06:46:56,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-08-19 06:46:56,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 401 transitions. [2020-08-19 06:46:56,444 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 401 transitions. Word has length 126 [2020-08-19 06:46:56,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:56,445 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 401 transitions. [2020-08-19 06:46:56,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-19 06:46:56,445 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 401 transitions. [2020-08-19 06:46:56,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-08-19 06:46:56,447 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:56,448 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:56,448 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-08-19 06:46:56,448 INFO L427 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash 1807018750, now seen corresponding path program 1 times [2020-08-19 06:46:56,449 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:56,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372630813] [2020-08-19 06:46:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:56,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:56,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,679 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,684 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:56,751 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:56,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372630813] [2020-08-19 06:46:56,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:56,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-19 06:46:56,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151685759] [2020-08-19 06:46:56,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-19 06:46:56,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:56,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-19 06:46:56,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-08-19 06:46:56,753 INFO L87 Difference]: Start difference. First operand 265 states and 401 transitions. Second operand 12 states. [2020-08-19 06:46:56,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:56,982 INFO L93 Difference]: Finished difference Result 284 states and 423 transitions. [2020-08-19 06:46:56,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:56,983 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 126 [2020-08-19 06:46:56,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:56,985 INFO L225 Difference]: With dead ends: 284 [2020-08-19 06:46:56,985 INFO L226 Difference]: Without dead ends: 274 [2020-08-19 06:46:56,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2020-08-19 06:46:56,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-08-19 06:46:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 271. [2020-08-19 06:46:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-08-19 06:46:57,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 408 transitions. [2020-08-19 06:46:57,025 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 408 transitions. Word has length 126 [2020-08-19 06:46:57,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,025 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 408 transitions. [2020-08-19 06:46:57,025 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-19 06:46:57,025 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 408 transitions. [2020-08-19 06:46:57,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-08-19 06:46:57,030 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,030 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:57,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-08-19 06:46:57,030 INFO L427 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:57,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:57,031 INFO L82 PathProgramCache]: Analyzing trace with hash -93481782, now seen corresponding path program 1 times [2020-08-19 06:46:57,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:57,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587026862] [2020-08-19 06:46:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,140 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2020-08-19 06:46:57,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,232 INFO L134 CoverageAnalysis]: Checked inductivity of 858 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:57,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587026862] [2020-08-19 06:46:57,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:57,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-08-19 06:46:57,233 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683176525] [2020-08-19 06:46:57,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-19 06:46:57,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-19 06:46:57,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-08-19 06:46:57,235 INFO L87 Difference]: Start difference. First operand 271 states and 408 transitions. Second operand 8 states. [2020-08-19 06:46:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:57,342 INFO L93 Difference]: Finished difference Result 303 states and 449 transitions. [2020-08-19 06:46:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:57,343 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 127 [2020-08-19 06:46:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:57,345 INFO L225 Difference]: With dead ends: 303 [2020-08-19 06:46:57,345 INFO L226 Difference]: Without dead ends: 280 [2020-08-19 06:46:57,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-08-19 06:46:57,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 253. [2020-08-19 06:46:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-08-19 06:46:57,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 367 transitions. [2020-08-19 06:46:57,380 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 367 transitions. Word has length 127 [2020-08-19 06:46:57,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,380 INFO L479 AbstractCegarLoop]: Abstraction has 253 states and 367 transitions. [2020-08-19 06:46:57,380 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-19 06:46:57,381 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 367 transitions. [2020-08-19 06:46:57,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-08-19 06:46:57,383 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,383 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:57,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-08-19 06:46:57,385 INFO L427 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2078176781, now seen corresponding path program 1 times [2020-08-19 06:46:57,386 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:57,386 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637295824] [2020-08-19 06:46:57,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:57,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:57,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-08-19 06:46:57,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-08-19 06:46:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:57,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:57,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,524 INFO L134 CoverageAnalysis]: Checked inductivity of 860 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 846 trivial. 0 not checked. [2020-08-19 06:46:57,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637295824] [2020-08-19 06:46:57,525 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:57,525 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-19 06:46:57,525 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551741896] [2020-08-19 06:46:57,526 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-19 06:46:57,526 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-19 06:46:57,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:57,526 INFO L87 Difference]: Start difference. First operand 253 states and 367 transitions. Second operand 5 states. [2020-08-19 06:46:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:57,638 INFO L93 Difference]: Finished difference Result 409 states and 589 transitions. [2020-08-19 06:46:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-19 06:46:57,639 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 128 [2020-08-19 06:46:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:57,641 INFO L225 Difference]: With dead ends: 409 [2020-08-19 06:46:57,641 INFO L226 Difference]: Without dead ends: 155 [2020-08-19 06:46:57,642 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-19 06:46:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-19 06:46:57,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 140. [2020-08-19 06:46:57,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:46:57,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 202 transitions. [2020-08-19 06:46:57,666 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 202 transitions. Word has length 128 [2020-08-19 06:46:57,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,666 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 202 transitions. [2020-08-19 06:46:57,667 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-19 06:46:57,667 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 202 transitions. [2020-08-19 06:46:57,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 06:46:57,668 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,668 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] [2020-08-19 06:46:57,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-08-19 06:46:57,669 INFO L427 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:57,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:57,669 INFO L82 PathProgramCache]: Analyzing trace with hash 273720313, now seen corresponding path program 1 times [2020-08-19 06:46:57,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:57,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114347485] [2020-08-19 06:46:57,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:57,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:57,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:57,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,768 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:57,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:57,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:57,846 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 850 trivial. 0 not checked. [2020-08-19 06:46:57,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114347485] [2020-08-19 06:46:57,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:57,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-19 06:46:57,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189822406] [2020-08-19 06:46:57,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-19 06:46:57,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:57,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-19 06:46:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-08-19 06:46:57,848 INFO L87 Difference]: Start difference. First operand 140 states and 202 transitions. Second operand 9 states. [2020-08-19 06:46:57,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:57,975 INFO L93 Difference]: Finished difference Result 173 states and 242 transitions. [2020-08-19 06:46:57,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-19 06:46:57,976 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 131 [2020-08-19 06:46:57,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:57,977 INFO L225 Difference]: With dead ends: 173 [2020-08-19 06:46:57,977 INFO L226 Difference]: Without dead ends: 163 [2020-08-19 06:46:57,977 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:57,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-08-19 06:46:57,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 157. [2020-08-19 06:46:57,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 06:46:57,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 226 transitions. [2020-08-19 06:46:57,997 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 226 transitions. Word has length 131 [2020-08-19 06:46:57,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:57,998 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 226 transitions. [2020-08-19 06:46:57,998 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-19 06:46:57,998 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 226 transitions. [2020-08-19 06:46:57,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-08-19 06:46:57,999 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:57,999 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:57,999 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-08-19 06:46:58,000 INFO L427 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:58,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:58,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1006143365, now seen corresponding path program 1 times [2020-08-19 06:46:58,000 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:58,000 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232195042] [2020-08-19 06:46:58,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:58,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:58,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:58,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,103 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:58,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:58,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,141 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2020-08-19 06:46:58,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2020-08-19 06:46:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,270 INFO L134 CoverageAnalysis]: Checked inductivity of 859 backedges. 12 proven. 3 refuted. 0 times theorem prover too weak. 844 trivial. 0 not checked. [2020-08-19 06:46:58,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232195042] [2020-08-19 06:46:58,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:58,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:46:58,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509123699] [2020-08-19 06:46:58,273 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:46:58,273 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:58,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:46:58,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:46:58,274 INFO L87 Difference]: Start difference. First operand 157 states and 226 transitions. Second operand 13 states. [2020-08-19 06:46:58,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:58,567 INFO L93 Difference]: Finished difference Result 175 states and 246 transitions. [2020-08-19 06:46:58,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-19 06:46:58,568 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 131 [2020-08-19 06:46:58,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:58,569 INFO L225 Difference]: With dead ends: 175 [2020-08-19 06:46:58,569 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 06:46:58,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2020-08-19 06:46:58,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 06:46:58,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 137. [2020-08-19 06:46:58,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 06:46:58,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 173 transitions. [2020-08-19 06:46:58,586 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 173 transitions. Word has length 131 [2020-08-19 06:46:58,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:58,587 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 173 transitions. [2020-08-19 06:46:58,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:46:58,587 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 173 transitions. [2020-08-19 06:46:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:46:58,591 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:58,592 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:58,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-08-19 06:46:58,592 INFO L427 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:58,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:58,592 INFO L82 PathProgramCache]: Analyzing trace with hash 1204770984, now seen corresponding path program 2 times [2020-08-19 06:46:58,592 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:58,593 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569762974] [2020-08-19 06:46:58,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:58,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:58,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:58,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:58,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:46:58,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:58,847 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-08-19 06:46:58,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569762974] [2020-08-19 06:46:58,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-19 06:46:58,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-08-19 06:46:58,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557065872] [2020-08-19 06:46:58,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:58,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:58,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:58,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:58,849 INFO L87 Difference]: Start difference. First operand 137 states and 173 transitions. Second operand 11 states. [2020-08-19 06:46:59,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:59,056 INFO L93 Difference]: Finished difference Result 184 states and 231 transitions. [2020-08-19 06:46:59,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:59,056 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 06:46:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:59,058 INFO L225 Difference]: With dead ends: 184 [2020-08-19 06:46:59,058 INFO L226 Difference]: Without dead ends: 174 [2020-08-19 06:46:59,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:46:59,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-08-19 06:46:59,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 157. [2020-08-19 06:46:59,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-08-19 06:46:59,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 202 transitions. [2020-08-19 06:46:59,083 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 202 transitions. Word has length 135 [2020-08-19 06:46:59,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:59,086 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 202 transitions. [2020-08-19 06:46:59,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:59,086 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 202 transitions. [2020-08-19 06:46:59,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:46:59,088 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:59,088 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:59,089 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-08-19 06:46:59,089 INFO L427 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:59,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:59,090 INFO L82 PathProgramCache]: Analyzing trace with hash -75092694, now seen corresponding path program 2 times [2020-08-19 06:46:59,090 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:59,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957170420] [2020-08-19 06:46:59,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:59,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:59,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:59,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:59,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:59,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:59,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:46:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:46:59,473 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957170420] [2020-08-19 06:46:59,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:59,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-19 06:46:59,474 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245509590] [2020-08-19 06:46:59,474 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-19 06:46:59,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:59,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-19 06:46:59,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-08-19 06:46:59,475 INFO L87 Difference]: Start difference. First operand 157 states and 202 transitions. Second operand 11 states. [2020-08-19 06:46:59,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:46:59,678 INFO L93 Difference]: Finished difference Result 194 states and 247 transitions. [2020-08-19 06:46:59,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:46:59,679 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-08-19 06:46:59,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:46:59,680 INFO L225 Difference]: With dead ends: 194 [2020-08-19 06:46:59,680 INFO L226 Difference]: Without dead ends: 150 [2020-08-19 06:46:59,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2020-08-19 06:46:59,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-08-19 06:46:59,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 140. [2020-08-19 06:46:59,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:46:59,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 176 transitions. [2020-08-19 06:46:59,699 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 176 transitions. Word has length 135 [2020-08-19 06:46:59,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:46:59,699 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 176 transitions. [2020-08-19 06:46:59,699 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-19 06:46:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 176 transitions. [2020-08-19 06:46:59,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:46:59,701 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:46:59,701 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:46:59,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-08-19 06:46:59,701 INFO L427 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:46:59,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:46:59,702 INFO L82 PathProgramCache]: Analyzing trace with hash 681202148, now seen corresponding path program 1 times [2020-08-19 06:46:59,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:46:59,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832499494] [2020-08-19 06:46:59,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:46:59,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:46:59,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,810 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:46:59,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:46:59,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:46:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:46:59,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:46:59,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:46:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-08-19 06:46:59,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832499494] [2020-08-19 06:46:59,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:46:59,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:46:59,944 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137859779] [2020-08-19 06:46:59,944 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:46:59,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:46:59,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:46:59,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:46:59,945 INFO L87 Difference]: Start difference. First operand 140 states and 176 transitions. Second operand 10 states. [2020-08-19 06:47:00,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:00,122 INFO L93 Difference]: Finished difference Result 160 states and 199 transitions. [2020-08-19 06:47:00,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:47:00,123 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 06:47:00,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:00,124 INFO L225 Difference]: With dead ends: 160 [2020-08-19 06:47:00,124 INFO L226 Difference]: Without dead ends: 140 [2020-08-19 06:47:00,125 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:47:00,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-08-19 06:47:00,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2020-08-19 06:47:00,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-08-19 06:47:00,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 175 transitions. [2020-08-19 06:47:00,141 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 175 transitions. Word has length 135 [2020-08-19 06:47:00,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:00,141 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 175 transitions. [2020-08-19 06:47:00,141 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:47:00,142 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 175 transitions. [2020-08-19 06:47:00,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:47:00,143 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:00,143 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:00,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-08-19 06:47:00,143 INFO L427 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:00,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:00,143 INFO L82 PathProgramCache]: Analyzing trace with hash -598661530, now seen corresponding path program 1 times [2020-08-19 06:47:00,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:00,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578600118] [2020-08-19 06:47:00,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:00,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:00,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:00,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:47:00,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:47:00,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:47:00,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:47:00,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,567 INFO L134 CoverageAnalysis]: Checked inductivity of 864 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 849 trivial. 0 not checked. [2020-08-19 06:47:00,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578600118] [2020-08-19 06:47:00,568 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:00,568 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-19 06:47:00,568 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818684953] [2020-08-19 06:47:00,569 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-19 06:47:00,569 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:00,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-19 06:47:00,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-08-19 06:47:00,569 INFO L87 Difference]: Start difference. First operand 140 states and 175 transitions. Second operand 13 states. [2020-08-19 06:47:00,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:00,835 INFO L93 Difference]: Finished difference Result 155 states and 190 transitions. [2020-08-19 06:47:00,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-19 06:47:00,838 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 135 [2020-08-19 06:47:00,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:00,839 INFO L225 Difference]: With dead ends: 155 [2020-08-19 06:47:00,839 INFO L226 Difference]: Without dead ends: 137 [2020-08-19 06:47:00,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2020-08-19 06:47:00,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-08-19 06:47:00,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2020-08-19 06:47:00,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-19 06:47:00,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 171 transitions. [2020-08-19 06:47:00,854 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 171 transitions. Word has length 135 [2020-08-19 06:47:00,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:00,854 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 171 transitions. [2020-08-19 06:47:00,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-19 06:47:00,855 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 171 transitions. [2020-08-19 06:47:00,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-08-19 06:47:00,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-19 06:47:00,856 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 23, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-19 06:47:00,856 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-08-19 06:47:00,856 INFO L427 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-19 06:47:00,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-19 06:47:00,857 INFO L82 PathProgramCache]: Analyzing trace with hash -114976086, now seen corresponding path program 1 times [2020-08-19 06:47:00,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-19 06:47:00,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631252798] [2020-08-19 06:47:00,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-19 06:47:00,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-19 06:47:00,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2020-08-19 06:47:00,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:00,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-08-19 06:47:01,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:01,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2020-08-19 06:47:01,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:01,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2020-08-19 06:47:01,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:01,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2020-08-19 06:47:01,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-19 06:47:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 857 trivial. 0 not checked. [2020-08-19 06:47:01,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631252798] [2020-08-19 06:47:01,140 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-19 06:47:01,140 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-19 06:47:01,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730527218] [2020-08-19 06:47:01,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-19 06:47:01,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-19 06:47:01,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-19 06:47:01,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-08-19 06:47:01,142 INFO L87 Difference]: Start difference. First operand 137 states and 171 transitions. Second operand 10 states. [2020-08-19 06:47:01,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-19 06:47:01,316 INFO L93 Difference]: Finished difference Result 137 states and 171 transitions. [2020-08-19 06:47:01,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-19 06:47:01,316 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 135 [2020-08-19 06:47:01,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-19 06:47:01,316 INFO L225 Difference]: With dead ends: 137 [2020-08-19 06:47:01,317 INFO L226 Difference]: Without dead ends: 0 [2020-08-19 06:47:01,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-08-19 06:47:01,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-19 06:47:01,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-19 06:47:01,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-19 06:47:01,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-19 06:47:01,321 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2020-08-19 06:47:01,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-19 06:47:01,321 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-19 06:47:01,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-19 06:47:01,322 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-19 06:47:01,322 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-19 06:47:01,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2020-08-19 06:47:01,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-19 06:47:02,103 WARN L193 SmtUtils]: Spent 760.00 ms on a formula simplification. DAG size of input: 598 DAG size of output: 136