/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 04:46:10,307 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 04:46:10,310 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 04:46:10,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 04:46:10,354 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 04:46:10,364 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 04:46:10,366 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 04:46:10,369 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 04:46:10,372 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 04:46:10,375 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 04:46:10,376 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 04:46:10,378 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 04:46:10,378 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 04:46:10,381 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 04:46:10,383 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 04:46:10,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 04:46:10,386 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 04:46:10,387 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 04:46:10,388 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 04:46:10,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 04:46:10,399 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 04:46:10,400 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 04:46:10,401 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 04:46:10,402 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 04:46:10,418 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 04:46:10,433 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 04:46:10,435 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 04:46:10,435 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 04:46:10,436 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-08-22 04:46:10,476 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 04:46:10,477 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 04:46:10,479 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 04:46:10,479 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 04:46:10,479 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 04:46:10,479 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 04:46:10,480 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 04:46:10,480 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 04:46:10,480 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 04:46:10,481 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 04:46:10,482 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 04:46:10,482 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 04:46:10,482 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 04:46:10,483 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 04:46:10,483 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 04:46:10,483 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 04:46:10,483 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 04:46:10,484 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 04:46:10,484 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 04:46:10,484 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 04:46:10,484 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 04:46:10,485 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:10,485 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 04:46:10,485 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 04:46:10,485 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 04:46:10,486 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 04:46:10,486 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 04:46:10,486 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 04:46:10,486 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 04:46:10,486 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true; [2020-08-22 04:46:10,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 04:46:10,815 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 04:46:10,823 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 04:46:10,827 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 04:46:10,828 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 04:46:10,828 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-22 04:46:10,901 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/060303d2a/3d39146b9c594dccb81ceacaadc3a374/FLAG96473ec13 [2020-08-22 04:46:11,389 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 04:46:11,390 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-08-22 04:46:11,397 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/060303d2a/3d39146b9c594dccb81ceacaadc3a374/FLAG96473ec13 [2020-08-22 04:46:11,775 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/060303d2a/3d39146b9c594dccb81ceacaadc3a374 [2020-08-22 04:46:11,782 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 04:46:11,784 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 04:46:11,785 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:11,785 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 04:46:11,788 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 04:46:11,789 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,792 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@677bd6f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:11, skipping insertion in model container [2020-08-22 04:46:11,792 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 04:46:11" (1/1) ... [2020-08-22 04:46:11,800 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 04:46:11,817 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 04:46:12,061 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:12,069 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 04:46:12,090 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 04:46:12,107 INFO L208 MainTranslator]: Completed translation [2020-08-22 04:46:12,107 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12 WrapperNode [2020-08-22 04:46:12,107 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 04:46:12,108 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 04:46:12,108 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 04:46:12,108 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 04:46:12,207 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,209 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,220 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,220 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,239 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,244 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,246 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... [2020-08-22 04:46:12,248 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 04:46:12,249 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 04:46:12,249 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 04:46:12,249 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 04:46:12,250 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 04:46:12,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 04:46:12,309 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 04:46:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 04:46:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-08-22 04:46:12,310 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 04:46:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-08-22 04:46:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 04:46:12,310 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 04:46:12,311 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-08-22 04:46:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 04:46:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 04:46:12,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 04:46:12,569 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 04:46:12,570 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-08-22 04:46:12,575 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:12 BoogieIcfgContainer [2020-08-22 04:46:12,575 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 04:46:12,576 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 04:46:12,576 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 04:46:12,580 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 04:46:12,580 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 04:46:11" (1/3) ... [2020-08-22 04:46:12,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e82a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:12, skipping insertion in model container [2020-08-22 04:46:12,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 04:46:12" (2/3) ... [2020-08-22 04:46:12,581 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46e82a89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 04:46:12, skipping insertion in model container [2020-08-22 04:46:12,581 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 04:46:12" (3/3) ... [2020-08-22 04:46:12,583 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-08-22 04:46:12,594 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 04:46:12,613 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 04:46:12,656 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 04:46:12,706 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 04:46:12,706 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 04:46:12,706 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 04:46:12,706 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 04:46:12,706 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 04:46:12,707 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 04:46:12,707 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 04:46:12,707 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 04:46:12,727 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-08-22 04:46:12,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:46:12,734 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:12,735 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:12,736 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:12,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:12,743 INFO L82 PathProgramCache]: Analyzing trace with hash -850547107, now seen corresponding path program 1 times [2020-08-22 04:46:12,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:12,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324454182] [2020-08-22 04:46:12,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:12,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:12,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:12,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:12,993 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324454182] [2020-08-22 04:46:12,997 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:12,997 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 04:46:12,998 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745797097] [2020-08-22 04:46:13,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 04:46:13,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:13,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 04:46:13,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 04:46:13,021 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 4 states. [2020-08-22 04:46:13,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:13,172 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-08-22 04:46:13,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-08-22 04:46:13,174 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-08-22 04:46:13,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:13,185 INFO L225 Difference]: With dead ends: 59 [2020-08-22 04:46:13,186 INFO L226 Difference]: Without dead ends: 31 [2020-08-22 04:46:13,189 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:13,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-08-22 04:46:13,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2020-08-22 04:46:13,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-08-22 04:46:13,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-08-22 04:46:13,233 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 20 [2020-08-22 04:46:13,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:13,233 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-08-22 04:46:13,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 04:46:13,234 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-08-22 04:46:13,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 04:46:13,235 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:13,235 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:13,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 04:46:13,236 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:13,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1453375688, now seen corresponding path program 1 times [2020-08-22 04:46:13,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:13,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [718111046] [2020-08-22 04:46:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:13,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:13,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [718111046] [2020-08-22 04:46:13,422 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:13,423 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 04:46:13,423 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879545738] [2020-08-22 04:46:13,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:13,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:13,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:13,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:13,426 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 6 states. [2020-08-22 04:46:13,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:13,630 INFO L93 Difference]: Finished difference Result 48 states and 56 transitions. [2020-08-22 04:46:13,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 04:46:13,631 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 20 [2020-08-22 04:46:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:13,632 INFO L225 Difference]: With dead ends: 48 [2020-08-22 04:46:13,632 INFO L226 Difference]: Without dead ends: 30 [2020-08-22 04:46:13,634 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:13,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-08-22 04:46:13,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-08-22 04:46:13,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-08-22 04:46:13,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-08-22 04:46:13,642 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-08-22 04:46:13,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:13,643 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-08-22 04:46:13,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:13,643 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-08-22 04:46:13,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 04:46:13,644 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:13,644 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:13,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 04:46:13,645 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:13,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:13,645 INFO L82 PathProgramCache]: Analyzing trace with hash -169907062, now seen corresponding path program 1 times [2020-08-22 04:46:13,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:13,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122388570] [2020-08-22 04:46:13,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:13,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,742 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:13,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:13,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122388570] [2020-08-22 04:46:13,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:13,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 04:46:13,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182191016] [2020-08-22 04:46:13,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 04:46:13,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:13,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 04:46:13,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:13,852 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 7 states. [2020-08-22 04:46:14,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:14,030 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-08-22 04:46:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 04:46:14,031 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 22 [2020-08-22 04:46:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:14,032 INFO L225 Difference]: With dead ends: 50 [2020-08-22 04:46:14,032 INFO L226 Difference]: Without dead ends: 32 [2020-08-22 04:46:14,033 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:14,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-08-22 04:46:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2020-08-22 04:46:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-08-22 04:46:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2020-08-22 04:46:14,041 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2020-08-22 04:46:14,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:14,041 INFO L479 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2020-08-22 04:46:14,041 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 04:46:14,041 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2020-08-22 04:46:14,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-08-22 04:46:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:14,042 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:14,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 04:46:14,043 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:14,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1071501364, now seen corresponding path program 2 times [2020-08-22 04:46:14,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:14,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833176662] [2020-08-22 04:46:14,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:14,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:14,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833176662] [2020-08-22 04:46:14,330 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:14,330 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-08-22 04:46:14,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451634074] [2020-08-22 04:46:14,331 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-08-22 04:46:14,331 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:14,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-08-22 04:46:14,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-08-22 04:46:14,334 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand 8 states. [2020-08-22 04:46:14,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:14,515 INFO L93 Difference]: Finished difference Result 52 states and 60 transitions. [2020-08-22 04:46:14,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 04:46:14,516 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-08-22 04:46:14,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:14,517 INFO L225 Difference]: With dead ends: 52 [2020-08-22 04:46:14,518 INFO L226 Difference]: Without dead ends: 34 [2020-08-22 04:46:14,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:46:14,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-08-22 04:46:14,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2020-08-22 04:46:14,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-08-22 04:46:14,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-08-22 04:46:14,525 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 24 [2020-08-22 04:46:14,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:14,526 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-08-22 04:46:14,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-08-22 04:46:14,526 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-08-22 04:46:14,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-08-22 04:46:14,527 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:14,528 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:14,528 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 04:46:14,528 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:14,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:14,529 INFO L82 PathProgramCache]: Analyzing trace with hash 79768206, now seen corresponding path program 3 times [2020-08-22 04:46:14,529 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:14,530 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716459751] [2020-08-22 04:46:14,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:14,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:14,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:14,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:14,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716459751] [2020-08-22 04:46:14,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:14,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 04:46:14,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407719514] [2020-08-22 04:46:14,830 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 04:46:14,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:14,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 04:46:14,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-08-22 04:46:14,832 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 9 states. [2020-08-22 04:46:15,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,004 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2020-08-22 04:46:15,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-08-22 04:46:15,004 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-08-22 04:46:15,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,005 INFO L225 Difference]: With dead ends: 54 [2020-08-22 04:46:15,006 INFO L226 Difference]: Without dead ends: 36 [2020-08-22 04:46:15,006 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:15,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-08-22 04:46:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2020-08-22 04:46:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-08-22 04:46:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-08-22 04:46:15,013 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 26 [2020-08-22 04:46:15,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,013 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-08-22 04:46:15,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 04:46:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-08-22 04:46:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-08-22 04:46:15,014 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,015 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 04:46:15,015 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,016 INFO L82 PathProgramCache]: Analyzing trace with hash -1651737392, now seen corresponding path program 4 times [2020-08-22 04:46:15,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595878772] [2020-08-22 04:46:15,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595878772] [2020-08-22 04:46:15,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:15,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 04:46:15,317 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291893716] [2020-08-22 04:46:15,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 04:46:15,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 04:46:15,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-08-22 04:46:15,325 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 10 states. [2020-08-22 04:46:15,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,499 INFO L93 Difference]: Finished difference Result 56 states and 64 transitions. [2020-08-22 04:46:15,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-08-22 04:46:15,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 28 [2020-08-22 04:46:15,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,501 INFO L225 Difference]: With dead ends: 56 [2020-08-22 04:46:15,501 INFO L226 Difference]: Without dead ends: 38 [2020-08-22 04:46:15,502 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-08-22 04:46:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2020-08-22 04:46:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-08-22 04:46:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 41 transitions. [2020-08-22 04:46:15,508 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 41 transitions. Word has length 28 [2020-08-22 04:46:15,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,508 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 41 transitions. [2020-08-22 04:46:15,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 04:46:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 41 transitions. [2020-08-22 04:46:15,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-08-22 04:46:15,509 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,509 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 04:46:15,510 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,510 INFO L82 PathProgramCache]: Analyzing trace with hash 818693778, now seen corresponding path program 5 times [2020-08-22 04:46:15,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1110206574] [2020-08-22 04:46:15,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:15,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:15,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:15,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1110206574] [2020-08-22 04:46:15,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:15,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 04:46:15,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100709965] [2020-08-22 04:46:15,773 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 04:46:15,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:15,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 04:46:15,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-08-22 04:46:15,774 INFO L87 Difference]: Start difference. First operand 37 states and 41 transitions. Second operand 11 states. [2020-08-22 04:46:15,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:15,964 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-08-22 04:46:15,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 04:46:15,964 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-08-22 04:46:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:15,965 INFO L225 Difference]: With dead ends: 58 [2020-08-22 04:46:15,965 INFO L226 Difference]: Without dead ends: 40 [2020-08-22 04:46:15,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:15,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-08-22 04:46:15,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2020-08-22 04:46:15,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-08-22 04:46:15,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2020-08-22 04:46:15,975 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 30 [2020-08-22 04:46:15,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:15,978 INFO L479 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2020-08-22 04:46:15,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 04:46:15,978 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2020-08-22 04:46:15,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-08-22 04:46:15,980 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:15,981 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:15,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 04:46:15,981 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:15,981 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:15,981 INFO L82 PathProgramCache]: Analyzing trace with hash -213866540, now seen corresponding path program 6 times [2020-08-22 04:46:15,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:15,983 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886627697] [2020-08-22 04:46:15,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,402 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:16,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886627697] [2020-08-22 04:46:16,403 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:16,403 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 04:46:16,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576690517] [2020-08-22 04:46:16,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 04:46:16,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:16,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 04:46:16,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-08-22 04:46:16,405 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand 12 states. [2020-08-22 04:46:16,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:16,648 INFO L93 Difference]: Finished difference Result 60 states and 68 transitions. [2020-08-22 04:46:16,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 04:46:16,648 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 32 [2020-08-22 04:46:16,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:16,649 INFO L225 Difference]: With dead ends: 60 [2020-08-22 04:46:16,649 INFO L226 Difference]: Without dead ends: 42 [2020-08-22 04:46:16,650 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:46:16,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-08-22 04:46:16,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2020-08-22 04:46:16,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-08-22 04:46:16,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-08-22 04:46:16,655 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 32 [2020-08-22 04:46:16,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:16,656 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-08-22 04:46:16,656 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 04:46:16,656 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-08-22 04:46:16,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-08-22 04:46:16,657 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:16,657 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:16,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 04:46:16,658 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:16,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:16,658 INFO L82 PathProgramCache]: Analyzing trace with hash -366886762, now seen corresponding path program 7 times [2020-08-22 04:46:16,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:16,658 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241758924] [2020-08-22 04:46:16,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:16,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:16,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,005 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241758924] [2020-08-22 04:46:17,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,006 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 04:46:17,006 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243215808] [2020-08-22 04:46:17,006 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 04:46:17,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 04:46:17,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-08-22 04:46:17,007 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 13 states. [2020-08-22 04:46:17,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,191 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-08-22 04:46:17,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 04:46:17,191 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-08-22 04:46:17,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,192 INFO L225 Difference]: With dead ends: 62 [2020-08-22 04:46:17,192 INFO L226 Difference]: Without dead ends: 44 [2020-08-22 04:46:17,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:46:17,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-08-22 04:46:17,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2020-08-22 04:46:17,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-08-22 04:46:17,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 47 transitions. [2020-08-22 04:46:17,198 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 47 transitions. Word has length 34 [2020-08-22 04:46:17,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,199 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 47 transitions. [2020-08-22 04:46:17,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 04:46:17,199 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 47 transitions. [2020-08-22 04:46:17,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-08-22 04:46:17,200 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,200 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,200 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 04:46:17,200 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1390432040, now seen corresponding path program 8 times [2020-08-22 04:46:17,201 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1288192983] [2020-08-22 04:46:17,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:17,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 04:46:17,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1288192983] [2020-08-22 04:46:17,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:17,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 04:46:17,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782980100] [2020-08-22 04:46:17,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 04:46:17,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 04:46:17,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2020-08-22 04:46:17,637 INFO L87 Difference]: Start difference. First operand 43 states and 47 transitions. Second operand 14 states. [2020-08-22 04:46:17,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:17,858 INFO L93 Difference]: Finished difference Result 64 states and 72 transitions. [2020-08-22 04:46:17,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 04:46:17,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 36 [2020-08-22 04:46:17,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:17,859 INFO L225 Difference]: With dead ends: 64 [2020-08-22 04:46:17,859 INFO L226 Difference]: Without dead ends: 46 [2020-08-22 04:46:17,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:46:17,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-08-22 04:46:17,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2020-08-22 04:46:17,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-08-22 04:46:17,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 49 transitions. [2020-08-22 04:46:17,866 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 49 transitions. Word has length 36 [2020-08-22 04:46:17,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:17,866 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 49 transitions. [2020-08-22 04:46:17,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 04:46:17,867 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 49 transitions. [2020-08-22 04:46:17,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-08-22 04:46:17,867 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:17,867 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:17,868 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 04:46:17,868 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:17,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:17,868 INFO L82 PathProgramCache]: Analyzing trace with hash -1469933414, now seen corresponding path program 9 times [2020-08-22 04:46:17,868 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:17,869 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [832256302] [2020-08-22 04:46:17,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:17,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:17,927 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 04:46:17,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [832256302] [2020-08-22 04:46:17,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:17,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:17,928 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493540777] [2020-08-22 04:46:17,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:17,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:17,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:17,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:17,929 INFO L87 Difference]: Start difference. First operand 45 states and 49 transitions. Second operand 5 states. [2020-08-22 04:46:18,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,017 INFO L93 Difference]: Finished difference Result 65 states and 74 transitions. [2020-08-22 04:46:18,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:46:18,017 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 38 [2020-08-22 04:46:18,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,020 INFO L225 Difference]: With dead ends: 65 [2020-08-22 04:46:18,020 INFO L226 Difference]: Without dead ends: 53 [2020-08-22 04:46:18,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:18,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-08-22 04:46:18,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2020-08-22 04:46:18,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-08-22 04:46:18,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-08-22 04:46:18,031 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 38 [2020-08-22 04:46:18,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,031 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-08-22 04:46:18,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:18,031 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-08-22 04:46:18,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 04:46:18,032 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,032 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 04:46:18,032 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1568016950, now seen corresponding path program 1 times [2020-08-22 04:46:18,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996522680] [2020-08-22 04:46:18,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:18,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,103 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-08-22 04:46:18,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996522680] [2020-08-22 04:46:18,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 04:46:18,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401013207] [2020-08-22 04:46:18,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 04:46:18,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 04:46:18,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:18,105 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-08-22 04:46:18,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,197 INFO L93 Difference]: Finished difference Result 73 states and 85 transitions. [2020-08-22 04:46:18,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 04:46:18,198 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-08-22 04:46:18,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,199 INFO L225 Difference]: With dead ends: 73 [2020-08-22 04:46:18,199 INFO L226 Difference]: Without dead ends: 61 [2020-08-22 04:46:18,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-08-22 04:46:18,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-08-22 04:46:18,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-08-22 04:46:18,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 04:46:18,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2020-08-22 04:46:18,205 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 41 [2020-08-22 04:46:18,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,206 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2020-08-22 04:46:18,206 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 04:46:18,206 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2020-08-22 04:46:18,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 04:46:18,207 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,207 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,207 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 04:46:18,207 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,208 INFO L82 PathProgramCache]: Analyzing trace with hash 1298090650, now seen corresponding path program 2 times [2020-08-22 04:46:18,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [518834048] [2020-08-22 04:46:18,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,262 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:18,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-08-22 04:46:18,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [518834048] [2020-08-22 04:46:18,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 04:46:18,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 04:46:18,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348877608] [2020-08-22 04:46:18,276 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 04:46:18,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 04:46:18,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 04:46:18,277 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand 5 states. [2020-08-22 04:46:18,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:18,374 INFO L93 Difference]: Finished difference Result 69 states and 78 transitions. [2020-08-22 04:46:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 04:46:18,375 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 44 [2020-08-22 04:46:18,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:18,376 INFO L225 Difference]: With dead ends: 69 [2020-08-22 04:46:18,376 INFO L226 Difference]: Without dead ends: 49 [2020-08-22 04:46:18,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-08-22 04:46:18,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-08-22 04:46:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-08-22 04:46:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-08-22 04:46:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 52 transitions. [2020-08-22 04:46:18,382 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 52 transitions. Word has length 44 [2020-08-22 04:46:18,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:18,383 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 52 transitions. [2020-08-22 04:46:18,383 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 04:46:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 52 transitions. [2020-08-22 04:46:18,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-08-22 04:46:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:18,384 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:18,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 04:46:18,384 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:18,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash 318257626, now seen corresponding path program 1 times [2020-08-22 04:46:18,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:18,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715698599] [2020-08-22 04:46:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:18,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:18,825 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:18,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715698599] [2020-08-22 04:46:18,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:18,827 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 04:46:18,827 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196658799] [2020-08-22 04:46:18,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 04:46:18,828 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:18,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 04:46:18,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-08-22 04:46:18,828 INFO L87 Difference]: Start difference. First operand 49 states and 52 transitions. Second operand 15 states. [2020-08-22 04:46:19,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:19,039 INFO L93 Difference]: Finished difference Result 74 states and 80 transitions. [2020-08-22 04:46:19,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 04:46:19,040 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-08-22 04:46:19,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:19,041 INFO L225 Difference]: With dead ends: 74 [2020-08-22 04:46:19,042 INFO L226 Difference]: Without dead ends: 52 [2020-08-22 04:46:19,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=104, Invalid=202, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:46:19,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-08-22 04:46:19,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-08-22 04:46:19,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-08-22 04:46:19,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 54 transitions. [2020-08-22 04:46:19,049 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 54 transitions. Word has length 44 [2020-08-22 04:46:19,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:19,049 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 54 transitions. [2020-08-22 04:46:19,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 04:46:19,050 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 54 transitions. [2020-08-22 04:46:19,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-08-22 04:46:19,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:19,050 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:19,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 04:46:19,051 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:19,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:19,051 INFO L82 PathProgramCache]: Analyzing trace with hash -935313508, now seen corresponding path program 2 times [2020-08-22 04:46:19,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:19,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238022103] [2020-08-22 04:46:19,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:19,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:19,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,100 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:19,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:19,530 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238022103] [2020-08-22 04:46:19,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:19,531 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 04:46:19,531 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259984307] [2020-08-22 04:46:19,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 04:46:19,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:19,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 04:46:19,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-08-22 04:46:19,532 INFO L87 Difference]: Start difference. First operand 51 states and 54 transitions. Second operand 16 states. [2020-08-22 04:46:19,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:19,767 INFO L93 Difference]: Finished difference Result 76 states and 82 transitions. [2020-08-22 04:46:19,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 04:46:19,767 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-08-22 04:46:19,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:19,768 INFO L225 Difference]: With dead ends: 76 [2020-08-22 04:46:19,768 INFO L226 Difference]: Without dead ends: 54 [2020-08-22 04:46:19,769 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=224, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:19,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-08-22 04:46:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-08-22 04:46:19,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-08-22 04:46:19,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 56 transitions. [2020-08-22 04:46:19,775 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 56 transitions. Word has length 46 [2020-08-22 04:46:19,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:19,776 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 56 transitions. [2020-08-22 04:46:19,776 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 04:46:19,776 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 56 transitions. [2020-08-22 04:46:19,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-08-22 04:46:19,777 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:19,777 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:19,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 04:46:19,777 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:19,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:19,777 INFO L82 PathProgramCache]: Analyzing trace with hash 1268636894, now seen corresponding path program 3 times [2020-08-22 04:46:19,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:19,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [855971763] [2020-08-22 04:46:19,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:19,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:19,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,314 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:20,315 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [855971763] [2020-08-22 04:46:20,318 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:20,318 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 04:46:20,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159448295] [2020-08-22 04:46:20,319 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 04:46:20,319 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:20,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 04:46:20,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=175, Unknown=0, NotChecked=0, Total=272 [2020-08-22 04:46:20,320 INFO L87 Difference]: Start difference. First operand 53 states and 56 transitions. Second operand 17 states. [2020-08-22 04:46:20,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:20,561 INFO L93 Difference]: Finished difference Result 78 states and 84 transitions. [2020-08-22 04:46:20,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 04:46:20,562 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-08-22 04:46:20,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:20,562 INFO L225 Difference]: With dead ends: 78 [2020-08-22 04:46:20,563 INFO L226 Difference]: Without dead ends: 56 [2020-08-22 04:46:20,564 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=247, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:46:20,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-08-22 04:46:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-08-22 04:46:20,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-08-22 04:46:20,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2020-08-22 04:46:20,577 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 48 [2020-08-22 04:46:20,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:20,577 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2020-08-22 04:46:20,577 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 04:46:20,577 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2020-08-22 04:46:20,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-08-22 04:46:20,581 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:20,581 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:20,581 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 04:46:20,581 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:20,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:20,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1846096288, now seen corresponding path program 4 times [2020-08-22 04:46:20,582 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:20,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545143309] [2020-08-22 04:46:20,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:20,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:20,661 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:21,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545143309] [2020-08-22 04:46:21,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:21,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 04:46:21,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809860870] [2020-08-22 04:46:21,175 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 04:46:21,175 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:21,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 04:46:21,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=195, Unknown=0, NotChecked=0, Total=306 [2020-08-22 04:46:21,176 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand 18 states. [2020-08-22 04:46:21,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:21,471 INFO L93 Difference]: Finished difference Result 80 states and 86 transitions. [2020-08-22 04:46:21,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 04:46:21,472 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 50 [2020-08-22 04:46:21,472 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:21,473 INFO L225 Difference]: With dead ends: 80 [2020-08-22 04:46:21,473 INFO L226 Difference]: Without dead ends: 58 [2020-08-22 04:46:21,474 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:46:21,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-08-22 04:46:21,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-08-22 04:46:21,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 04:46:21,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-08-22 04:46:21,482 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 50 [2020-08-22 04:46:21,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:21,482 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-08-22 04:46:21,482 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 04:46:21,482 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-08-22 04:46:21,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-08-22 04:46:21,483 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:21,483 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:21,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 04:46:21,484 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:21,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:21,484 INFO L82 PathProgramCache]: Analyzing trace with hash -1561174558, now seen corresponding path program 5 times [2020-08-22 04:46:21,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:21,485 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85337609] [2020-08-22 04:46:21,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:21,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:21,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,155 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:22,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85337609] [2020-08-22 04:46:22,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:22,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 04:46:22,156 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531134468] [2020-08-22 04:46:22,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 04:46:22,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:22,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 04:46:22,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=216, Unknown=0, NotChecked=0, Total=342 [2020-08-22 04:46:22,157 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 19 states. [2020-08-22 04:46:22,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:22,379 INFO L93 Difference]: Finished difference Result 82 states and 88 transitions. [2020-08-22 04:46:22,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 04:46:22,380 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 52 [2020-08-22 04:46:22,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:22,381 INFO L225 Difference]: With dead ends: 82 [2020-08-22 04:46:22,381 INFO L226 Difference]: Without dead ends: 60 [2020-08-22 04:46:22,382 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=296, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-08-22 04:46:22,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-08-22 04:46:22,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 04:46:22,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 62 transitions. [2020-08-22 04:46:22,386 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 62 transitions. Word has length 52 [2020-08-22 04:46:22,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:22,386 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 62 transitions. [2020-08-22 04:46:22,387 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 04:46:22,387 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 62 transitions. [2020-08-22 04:46:22,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-08-22 04:46:22,387 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:22,387 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:22,388 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 04:46:22,388 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:22,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:22,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1111589284, now seen corresponding path program 6 times [2020-08-22 04:46:22,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:22,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957822505] [2020-08-22 04:46:22,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:22,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:22,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:22,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 201 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:23,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957822505] [2020-08-22 04:46:23,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:23,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 04:46:23,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965294542] [2020-08-22 04:46:23,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 04:46:23,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:23,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 04:46:23,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2020-08-22 04:46:23,079 INFO L87 Difference]: Start difference. First operand 59 states and 62 transitions. Second operand 20 states. [2020-08-22 04:46:23,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:23,357 INFO L93 Difference]: Finished difference Result 84 states and 90 transitions. [2020-08-22 04:46:23,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 04:46:23,358 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 54 [2020-08-22 04:46:23,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:23,359 INFO L225 Difference]: With dead ends: 84 [2020-08-22 04:46:23,359 INFO L226 Difference]: Without dead ends: 62 [2020-08-22 04:46:23,359 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=184, Invalid=322, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:46:23,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-08-22 04:46:23,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-08-22 04:46:23,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 04:46:23,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 64 transitions. [2020-08-22 04:46:23,368 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 64 transitions. Word has length 54 [2020-08-22 04:46:23,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:23,369 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 64 transitions. [2020-08-22 04:46:23,369 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 04:46:23,369 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 64 transitions. [2020-08-22 04:46:23,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-08-22 04:46:23,369 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:23,370 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:23,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 04:46:23,370 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:23,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:23,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1247198438, now seen corresponding path program 7 times [2020-08-22 04:46:23,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:23,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1403975971] [2020-08-22 04:46:23,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:23,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:23,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:23,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:23,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 230 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:24,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1403975971] [2020-08-22 04:46:24,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:24,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 04:46:24,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427302257] [2020-08-22 04:46:24,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 04:46:24,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:24,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 04:46:24,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=261, Unknown=0, NotChecked=0, Total=420 [2020-08-22 04:46:24,314 INFO L87 Difference]: Start difference. First operand 61 states and 64 transitions. Second operand 21 states. [2020-08-22 04:46:24,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:24,514 INFO L93 Difference]: Finished difference Result 86 states and 92 transitions. [2020-08-22 04:46:24,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 04:46:24,514 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-08-22 04:46:24,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:24,515 INFO L225 Difference]: With dead ends: 86 [2020-08-22 04:46:24,515 INFO L226 Difference]: Without dead ends: 64 [2020-08-22 04:46:24,516 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=349, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:46:24,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-08-22 04:46:24,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-08-22 04:46:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 04:46:24,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 66 transitions. [2020-08-22 04:46:24,523 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 66 transitions. Word has length 56 [2020-08-22 04:46:24,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:24,523 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 66 transitions. [2020-08-22 04:46:24,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 04:46:24,524 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 66 transitions. [2020-08-22 04:46:24,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-08-22 04:46:24,524 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:24,524 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:24,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 04:46:24,525 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:24,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:24,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1576390744, now seen corresponding path program 8 times [2020-08-22 04:46:24,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:24,526 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [485958473] [2020-08-22 04:46:24,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:24,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:24,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:24,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:24,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,266 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:25,266 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [485958473] [2020-08-22 04:46:25,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:25,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 04:46:25,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740497740] [2020-08-22 04:46:25,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 04:46:25,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:25,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 04:46:25,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=285, Unknown=0, NotChecked=0, Total=462 [2020-08-22 04:46:25,268 INFO L87 Difference]: Start difference. First operand 63 states and 66 transitions. Second operand 22 states. [2020-08-22 04:46:25,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:25,597 INFO L93 Difference]: Finished difference Result 88 states and 94 transitions. [2020-08-22 04:46:25,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 04:46:25,597 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 58 [2020-08-22 04:46:25,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:25,598 INFO L225 Difference]: With dead ends: 88 [2020-08-22 04:46:25,598 INFO L226 Difference]: Without dead ends: 66 [2020-08-22 04:46:25,599 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=223, Invalid=377, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:46:25,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-08-22 04:46:25,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-08-22 04:46:25,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 04:46:25,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2020-08-22 04:46:25,603 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 58 [2020-08-22 04:46:25,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:25,604 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2020-08-22 04:46:25,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 04:46:25,604 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2020-08-22 04:46:25,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-08-22 04:46:25,605 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:25,605 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:25,605 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 04:46:25,605 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:25,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:25,605 INFO L82 PathProgramCache]: Analyzing trace with hash -626263574, now seen corresponding path program 9 times [2020-08-22 04:46:25,606 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:25,606 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506337479] [2020-08-22 04:46:25,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:25,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:25,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:25,658 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:25,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,429 INFO L134 CoverageAnalysis]: Checked inductivity of 294 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:26,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506337479] [2020-08-22 04:46:26,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:26,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 04:46:26,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608632353] [2020-08-22 04:46:26,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 04:46:26,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:26,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 04:46:26,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=310, Unknown=0, NotChecked=0, Total=506 [2020-08-22 04:46:26,433 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand 23 states. [2020-08-22 04:46:26,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:26,765 INFO L93 Difference]: Finished difference Result 90 states and 96 transitions. [2020-08-22 04:46:26,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 04:46:26,768 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 60 [2020-08-22 04:46:26,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:26,769 INFO L225 Difference]: With dead ends: 90 [2020-08-22 04:46:26,769 INFO L226 Difference]: Without dead ends: 68 [2020-08-22 04:46:26,770 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=244, Invalid=406, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:26,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-08-22 04:46:26,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-08-22 04:46:26,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 04:46:26,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-08-22 04:46:26,774 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 60 [2020-08-22 04:46:26,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:26,774 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-08-22 04:46:26,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 04:46:26,775 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-08-22 04:46:26,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-08-22 04:46:26,775 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:26,775 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:26,776 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 04:46:26,776 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:26,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:26,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1912880044, now seen corresponding path program 10 times [2020-08-22 04:46:26,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:26,777 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1428251219] [2020-08-22 04:46:26,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:26,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:27,726 INFO L134 CoverageAnalysis]: Checked inductivity of 329 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:27,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1428251219] [2020-08-22 04:46:27,727 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:27,727 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 04:46:27,727 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528842435] [2020-08-22 04:46:27,727 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 04:46:27,728 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:27,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 04:46:27,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=336, Unknown=0, NotChecked=0, Total=552 [2020-08-22 04:46:27,728 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 24 states. [2020-08-22 04:46:28,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:28,005 INFO L93 Difference]: Finished difference Result 92 states and 98 transitions. [2020-08-22 04:46:28,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 04:46:28,006 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 62 [2020-08-22 04:46:28,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:28,007 INFO L225 Difference]: With dead ends: 92 [2020-08-22 04:46:28,007 INFO L226 Difference]: Without dead ends: 70 [2020-08-22 04:46:28,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=436, Unknown=0, NotChecked=0, Total=702 [2020-08-22 04:46:28,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-08-22 04:46:28,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-08-22 04:46:28,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 04:46:28,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 72 transitions. [2020-08-22 04:46:28,012 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 72 transitions. Word has length 62 [2020-08-22 04:46:28,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:28,013 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 72 transitions. [2020-08-22 04:46:28,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 04:46:28,013 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 72 transitions. [2020-08-22 04:46:28,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-08-22 04:46:28,013 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:28,014 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:28,014 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 04:46:28,014 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:28,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:28,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1806494482, now seen corresponding path program 11 times [2020-08-22 04:46:28,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:28,015 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141233622] [2020-08-22 04:46:28,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:28,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:28,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:28,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,015 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:29,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141233622] [2020-08-22 04:46:29,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:29,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 04:46:29,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871634374] [2020-08-22 04:46:29,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 04:46:29,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:29,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 04:46:29,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=363, Unknown=0, NotChecked=0, Total=600 [2020-08-22 04:46:29,018 INFO L87 Difference]: Start difference. First operand 69 states and 72 transitions. Second operand 25 states. [2020-08-22 04:46:29,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:29,358 INFO L93 Difference]: Finished difference Result 94 states and 100 transitions. [2020-08-22 04:46:29,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 04:46:29,359 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 64 [2020-08-22 04:46:29,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:29,360 INFO L225 Difference]: With dead ends: 94 [2020-08-22 04:46:29,360 INFO L226 Difference]: Without dead ends: 72 [2020-08-22 04:46:29,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=289, Invalid=467, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:46:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-08-22 04:46:29,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-08-22 04:46:29,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 04:46:29,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 74 transitions. [2020-08-22 04:46:29,365 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 74 transitions. Word has length 64 [2020-08-22 04:46:29,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:29,365 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 74 transitions. [2020-08-22 04:46:29,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 04:46:29,365 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 74 transitions. [2020-08-22 04:46:29,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-08-22 04:46:29,366 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:29,366 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:29,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 04:46:29,367 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:29,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:29,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1582343600, now seen corresponding path program 12 times [2020-08-22 04:46:29,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:29,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [875591018] [2020-08-22 04:46:29,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:29,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:29,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:29,422 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:29,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,432 INFO L134 CoverageAnalysis]: Checked inductivity of 405 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:30,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [875591018] [2020-08-22 04:46:30,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:30,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 04:46:30,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967730891] [2020-08-22 04:46:30,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 04:46:30,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:30,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 04:46:30,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=391, Unknown=0, NotChecked=0, Total=650 [2020-08-22 04:46:30,434 INFO L87 Difference]: Start difference. First operand 71 states and 74 transitions. Second operand 26 states. [2020-08-22 04:46:30,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:30,788 INFO L93 Difference]: Finished difference Result 96 states and 102 transitions. [2020-08-22 04:46:30,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 04:46:30,788 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 66 [2020-08-22 04:46:30,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:30,789 INFO L225 Difference]: With dead ends: 96 [2020-08-22 04:46:30,789 INFO L226 Difference]: Without dead ends: 74 [2020-08-22 04:46:30,790 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=313, Invalid=499, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:30,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-08-22 04:46:30,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-08-22 04:46:30,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 04:46:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 76 transitions. [2020-08-22 04:46:30,795 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 76 transitions. Word has length 66 [2020-08-22 04:46:30,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:30,795 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 76 transitions. [2020-08-22 04:46:30,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 04:46:30,795 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 76 transitions. [2020-08-22 04:46:30,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-08-22 04:46:30,796 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:30,796 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:30,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 04:46:30,797 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:30,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:30,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1624437262, now seen corresponding path program 13 times [2020-08-22 04:46:30,798 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:30,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22950973] [2020-08-22 04:46:30,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:30,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,849 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:30,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:30,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:30,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:31,902 INFO L134 CoverageAnalysis]: Checked inductivity of 446 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:31,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22950973] [2020-08-22 04:46:31,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:31,902 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 04:46:31,902 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58440678] [2020-08-22 04:46:31,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 04:46:31,903 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:31,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 04:46:31,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=282, Invalid=420, Unknown=0, NotChecked=0, Total=702 [2020-08-22 04:46:31,904 INFO L87 Difference]: Start difference. First operand 73 states and 76 transitions. Second operand 27 states. [2020-08-22 04:46:32,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:32,161 INFO L93 Difference]: Finished difference Result 98 states and 104 transitions. [2020-08-22 04:46:32,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 04:46:32,162 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 68 [2020-08-22 04:46:32,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:32,163 INFO L225 Difference]: With dead ends: 98 [2020-08-22 04:46:32,164 INFO L226 Difference]: Without dead ends: 76 [2020-08-22 04:46:32,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=338, Invalid=532, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:46:32,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-08-22 04:46:32,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-08-22 04:46:32,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 04:46:32,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2020-08-22 04:46:32,172 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 68 [2020-08-22 04:46:32,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:32,173 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2020-08-22 04:46:32,173 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 04:46:32,173 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2020-08-22 04:46:32,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-08-22 04:46:32,174 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:32,174 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:32,174 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 04:46:32,175 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:32,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:32,176 INFO L82 PathProgramCache]: Analyzing trace with hash 445672884, now seen corresponding path program 14 times [2020-08-22 04:46:32,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:32,177 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1285457966] [2020-08-22 04:46:32,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:32,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:32,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:32,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 489 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:33,296 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1285457966] [2020-08-22 04:46:33,296 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:33,296 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 04:46:33,297 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793176671] [2020-08-22 04:46:33,297 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 04:46:33,297 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:33,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 04:46:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=306, Invalid=450, Unknown=0, NotChecked=0, Total=756 [2020-08-22 04:46:33,298 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand 28 states. [2020-08-22 04:46:33,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:33,653 INFO L93 Difference]: Finished difference Result 100 states and 106 transitions. [2020-08-22 04:46:33,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 04:46:33,654 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 70 [2020-08-22 04:46:33,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:33,655 INFO L225 Difference]: With dead ends: 100 [2020-08-22 04:46:33,655 INFO L226 Difference]: Without dead ends: 78 [2020-08-22 04:46:33,656 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=364, Invalid=566, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:33,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-08-22 04:46:33,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-08-22 04:46:33,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 04:46:33,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-08-22 04:46:33,662 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 70 [2020-08-22 04:46:33,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:33,662 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-08-22 04:46:33,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 04:46:33,662 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-08-22 04:46:33,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-08-22 04:46:33,663 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:33,663 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:33,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 04:46:33,663 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:33,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:33,664 INFO L82 PathProgramCache]: Analyzing trace with hash 1251665142, now seen corresponding path program 15 times [2020-08-22 04:46:33,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:33,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [490467358] [2020-08-22 04:46:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:33,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:33,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:33,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:34,965 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:34,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [490467358] [2020-08-22 04:46:34,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:34,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 04:46:34,965 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107872530] [2020-08-22 04:46:34,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 04:46:34,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:34,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 04:46:34,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=481, Unknown=0, NotChecked=0, Total=812 [2020-08-22 04:46:34,967 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 29 states. [2020-08-22 04:46:35,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:35,347 INFO L93 Difference]: Finished difference Result 102 states and 108 transitions. [2020-08-22 04:46:35,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 04:46:35,347 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 72 [2020-08-22 04:46:35,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:35,348 INFO L225 Difference]: With dead ends: 102 [2020-08-22 04:46:35,348 INFO L226 Difference]: Without dead ends: 80 [2020-08-22 04:46:35,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=391, Invalid=601, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:46:35,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-08-22 04:46:35,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-08-22 04:46:35,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 04:46:35,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 82 transitions. [2020-08-22 04:46:35,357 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 82 transitions. Word has length 72 [2020-08-22 04:46:35,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:35,357 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 82 transitions. [2020-08-22 04:46:35,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 04:46:35,358 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 82 transitions. [2020-08-22 04:46:35,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-08-22 04:46:35,358 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:35,359 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:35,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 04:46:35,359 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:35,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:35,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1578855496, now seen corresponding path program 16 times [2020-08-22 04:46:35,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:35,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758376148] [2020-08-22 04:46:35,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:35,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:35,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:35,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:36,693 INFO L134 CoverageAnalysis]: Checked inductivity of 581 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:36,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758376148] [2020-08-22 04:46:36,693 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:36,693 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 04:46:36,693 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113194625] [2020-08-22 04:46:36,694 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 04:46:36,694 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:36,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 04:46:36,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=357, Invalid=513, Unknown=0, NotChecked=0, Total=870 [2020-08-22 04:46:36,695 INFO L87 Difference]: Start difference. First operand 79 states and 82 transitions. Second operand 30 states. [2020-08-22 04:46:37,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:37,013 INFO L93 Difference]: Finished difference Result 104 states and 110 transitions. [2020-08-22 04:46:37,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 04:46:37,014 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 74 [2020-08-22 04:46:37,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:37,015 INFO L225 Difference]: With dead ends: 104 [2020-08-22 04:46:37,015 INFO L226 Difference]: Without dead ends: 82 [2020-08-22 04:46:37,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=419, Invalid=637, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 04:46:37,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-08-22 04:46:37,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-08-22 04:46:37,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 04:46:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 84 transitions. [2020-08-22 04:46:37,022 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 84 transitions. Word has length 74 [2020-08-22 04:46:37,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:37,023 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 84 transitions. [2020-08-22 04:46:37,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 04:46:37,023 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 84 transitions. [2020-08-22 04:46:37,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-08-22 04:46:37,023 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:37,023 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:37,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 04:46:37,024 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:37,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:37,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1300077050, now seen corresponding path program 17 times [2020-08-22 04:46:37,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:37,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334600823] [2020-08-22 04:46:37,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:37,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,077 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:37,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:37,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:38,433 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:38,433 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334600823] [2020-08-22 04:46:38,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:38,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 04:46:38,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736315142] [2020-08-22 04:46:38,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 04:46:38,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 04:46:38,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=546, Unknown=0, NotChecked=0, Total=930 [2020-08-22 04:46:38,435 INFO L87 Difference]: Start difference. First operand 81 states and 84 transitions. Second operand 31 states. [2020-08-22 04:46:38,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:38,871 INFO L93 Difference]: Finished difference Result 106 states and 112 transitions. [2020-08-22 04:46:38,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 04:46:38,877 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 76 [2020-08-22 04:46:38,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:38,878 INFO L225 Difference]: With dead ends: 106 [2020-08-22 04:46:38,878 INFO L226 Difference]: Without dead ends: 84 [2020-08-22 04:46:38,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=448, Invalid=674, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:46:38,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-08-22 04:46:38,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-08-22 04:46:38,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 04:46:38,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2020-08-22 04:46:38,887 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 76 [2020-08-22 04:46:38,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:38,887 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2020-08-22 04:46:38,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 04:46:38,887 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2020-08-22 04:46:38,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-08-22 04:46:38,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:38,888 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:38,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 04:46:38,889 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:38,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:38,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1995315132, now seen corresponding path program 18 times [2020-08-22 04:46:38,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:38,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565406767] [2020-08-22 04:46:38,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:38,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:38,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:38,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:38,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,331 INFO L134 CoverageAnalysis]: Checked inductivity of 681 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:40,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565406767] [2020-08-22 04:46:40,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:40,331 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 04:46:40,331 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990094319] [2020-08-22 04:46:40,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 04:46:40,332 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:40,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 04:46:40,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=412, Invalid=580, Unknown=0, NotChecked=0, Total=992 [2020-08-22 04:46:40,332 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand 32 states. [2020-08-22 04:46:40,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:40,784 INFO L93 Difference]: Finished difference Result 108 states and 114 transitions. [2020-08-22 04:46:40,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 04:46:40,784 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 78 [2020-08-22 04:46:40,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:40,785 INFO L225 Difference]: With dead ends: 108 [2020-08-22 04:46:40,786 INFO L226 Difference]: Without dead ends: 86 [2020-08-22 04:46:40,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=478, Invalid=712, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 04:46:40,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-08-22 04:46:40,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-08-22 04:46:40,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 04:46:40,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2020-08-22 04:46:40,790 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 78 [2020-08-22 04:46:40,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:40,790 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2020-08-22 04:46:40,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 04:46:40,791 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2020-08-22 04:46:40,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-08-22 04:46:40,791 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:40,791 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:40,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 04:46:40,791 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:40,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:40,792 INFO L82 PathProgramCache]: Analyzing trace with hash 104213758, now seen corresponding path program 19 times [2020-08-22 04:46:40,792 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:40,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [810714753] [2020-08-22 04:46:40,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:40,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:40,856 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:40,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 734 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:42,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [810714753] [2020-08-22 04:46:42,412 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:42,412 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-08-22 04:46:42,413 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355660303] [2020-08-22 04:46:42,413 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-08-22 04:46:42,413 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:42,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-08-22 04:46:42,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=441, Invalid=615, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 04:46:42,415 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand 33 states. [2020-08-22 04:46:42,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:42,846 INFO L93 Difference]: Finished difference Result 110 states and 116 transitions. [2020-08-22 04:46:42,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 04:46:42,847 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 80 [2020-08-22 04:46:42,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:42,848 INFO L225 Difference]: With dead ends: 110 [2020-08-22 04:46:42,849 INFO L226 Difference]: Without dead ends: 88 [2020-08-22 04:46:42,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=509, Invalid=751, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 04:46:42,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-08-22 04:46:42,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-08-22 04:46:42,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 04:46:42,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-08-22 04:46:42,855 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 80 [2020-08-22 04:46:42,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:42,855 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-08-22 04:46:42,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-08-22 04:46:42,856 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-08-22 04:46:42,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-08-22 04:46:42,856 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:42,857 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:42,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 04:46:42,857 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:42,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:42,857 INFO L82 PathProgramCache]: Analyzing trace with hash -473040448, now seen corresponding path program 20 times [2020-08-22 04:46:42,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:42,858 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1012460793] [2020-08-22 04:46:42,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:42,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,915 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:42,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:42,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:42,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:44,465 INFO L134 CoverageAnalysis]: Checked inductivity of 789 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:44,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1012460793] [2020-08-22 04:46:44,465 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:44,465 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-08-22 04:46:44,465 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900091422] [2020-08-22 04:46:44,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-08-22 04:46:44,466 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:44,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-08-22 04:46:44,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=471, Invalid=651, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 04:46:44,468 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 34 states. [2020-08-22 04:46:44,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:44,950 INFO L93 Difference]: Finished difference Result 112 states and 118 transitions. [2020-08-22 04:46:44,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 04:46:44,950 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 82 [2020-08-22 04:46:44,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:44,951 INFO L225 Difference]: With dead ends: 112 [2020-08-22 04:46:44,951 INFO L226 Difference]: Without dead ends: 90 [2020-08-22 04:46:44,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=541, Invalid=791, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 04:46:44,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-08-22 04:46:44,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-08-22 04:46:44,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 04:46:44,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2020-08-22 04:46:44,958 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 82 [2020-08-22 04:46:44,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:44,958 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2020-08-22 04:46:44,958 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-08-22 04:46:44,958 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2020-08-22 04:46:44,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-08-22 04:46:44,959 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:44,959 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:44,959 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 04:46:44,959 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:44,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1163551230, now seen corresponding path program 21 times [2020-08-22 04:46:44,960 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:44,960 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929960247] [2020-08-22 04:46:44,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:45,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 846 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:46,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929960247] [2020-08-22 04:46:46,721 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:46,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-08-22 04:46:46,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202949145] [2020-08-22 04:46:46,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-08-22 04:46:46,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:46,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-08-22 04:46:46,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=502, Invalid=688, Unknown=0, NotChecked=0, Total=1190 [2020-08-22 04:46:46,722 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand 35 states. [2020-08-22 04:46:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:47,180 INFO L93 Difference]: Finished difference Result 114 states and 120 transitions. [2020-08-22 04:46:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-08-22 04:46:47,181 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 84 [2020-08-22 04:46:47,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:47,182 INFO L225 Difference]: With dead ends: 114 [2020-08-22 04:46:47,182 INFO L226 Difference]: Without dead ends: 92 [2020-08-22 04:46:47,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=574, Invalid=832, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 04:46:47,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-08-22 04:46:47,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-08-22 04:46:47,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 04:46:47,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 94 transitions. [2020-08-22 04:46:47,189 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 94 transitions. Word has length 84 [2020-08-22 04:46:47,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:47,192 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 94 transitions. [2020-08-22 04:46:47,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-08-22 04:46:47,192 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 94 transitions. [2020-08-22 04:46:47,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-08-22 04:46:47,192 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:47,192 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:47,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-08-22 04:46:47,193 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:47,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:47,193 INFO L82 PathProgramCache]: Analyzing trace with hash 975518148, now seen corresponding path program 22 times [2020-08-22 04:46:47,193 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:47,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [260035391] [2020-08-22 04:46:47,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:47,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:47,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:47,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:48,986 INFO L134 CoverageAnalysis]: Checked inductivity of 905 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:48,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [260035391] [2020-08-22 04:46:48,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:48,988 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-08-22 04:46:48,988 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812439493] [2020-08-22 04:46:48,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-08-22 04:46:48,989 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:48,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-08-22 04:46:48,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=726, Unknown=0, NotChecked=0, Total=1260 [2020-08-22 04:46:48,990 INFO L87 Difference]: Start difference. First operand 91 states and 94 transitions. Second operand 36 states. [2020-08-22 04:46:49,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:49,363 INFO L93 Difference]: Finished difference Result 116 states and 122 transitions. [2020-08-22 04:46:49,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-08-22 04:46:49,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 86 [2020-08-22 04:46:49,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:49,365 INFO L225 Difference]: With dead ends: 116 [2020-08-22 04:46:49,365 INFO L226 Difference]: Without dead ends: 94 [2020-08-22 04:46:49,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=608, Invalid=874, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 04:46:49,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-08-22 04:46:49,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-08-22 04:46:49,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 04:46:49,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 96 transitions. [2020-08-22 04:46:49,372 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 96 transitions. Word has length 86 [2020-08-22 04:46:49,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:49,372 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 96 transitions. [2020-08-22 04:46:49,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-08-22 04:46:49,372 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 96 transitions. [2020-08-22 04:46:49,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-08-22 04:46:49,373 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:49,373 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:49,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-08-22 04:46:49,374 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:49,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:49,374 INFO L82 PathProgramCache]: Analyzing trace with hash -668144378, now seen corresponding path program 23 times [2020-08-22 04:46:49,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:49,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277604709] [2020-08-22 04:46:49,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:49,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:49,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:49,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:49,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,308 INFO L134 CoverageAnalysis]: Checked inductivity of 966 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:51,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277604709] [2020-08-22 04:46:51,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:51,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-08-22 04:46:51,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718484384] [2020-08-22 04:46:51,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-08-22 04:46:51,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:51,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-08-22 04:46:51,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=567, Invalid=765, Unknown=0, NotChecked=0, Total=1332 [2020-08-22 04:46:51,310 INFO L87 Difference]: Start difference. First operand 93 states and 96 transitions. Second operand 37 states. [2020-08-22 04:46:51,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:51,824 INFO L93 Difference]: Finished difference Result 118 states and 124 transitions. [2020-08-22 04:46:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-08-22 04:46:51,824 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 88 [2020-08-22 04:46:51,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:51,826 INFO L225 Difference]: With dead ends: 118 [2020-08-22 04:46:51,826 INFO L226 Difference]: Without dead ends: 96 [2020-08-22 04:46:51,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=643, Invalid=917, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 04:46:51,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-08-22 04:46:51,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-08-22 04:46:51,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 04:46:51,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2020-08-22 04:46:51,835 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 88 [2020-08-22 04:46:51,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:51,836 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2020-08-22 04:46:51,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-08-22 04:46:51,836 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2020-08-22 04:46:51,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-08-22 04:46:51,837 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:51,837 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:51,837 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-08-22 04:46:51,837 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:51,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:51,837 INFO L82 PathProgramCache]: Analyzing trace with hash 320133064, now seen corresponding path program 24 times [2020-08-22 04:46:51,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:51,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225333802] [2020-08-22 04:46:51,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,895 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:51,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:51,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:53,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1029 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:53,801 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225333802] [2020-08-22 04:46:53,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:53,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-08-22 04:46:53,802 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251318012] [2020-08-22 04:46:53,802 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-08-22 04:46:53,802 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:53,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-08-22 04:46:53,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=601, Invalid=805, Unknown=0, NotChecked=0, Total=1406 [2020-08-22 04:46:53,803 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand 38 states. [2020-08-22 04:46:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:54,247 INFO L93 Difference]: Finished difference Result 120 states and 126 transitions. [2020-08-22 04:46:54,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-08-22 04:46:54,248 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 90 [2020-08-22 04:46:54,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:54,249 INFO L225 Difference]: With dead ends: 120 [2020-08-22 04:46:54,249 INFO L226 Difference]: Without dead ends: 98 [2020-08-22 04:46:54,250 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=679, Invalid=961, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 04:46:54,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-08-22 04:46:54,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-08-22 04:46:54,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 04:46:54,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-08-22 04:46:54,266 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 90 [2020-08-22 04:46:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:54,266 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-08-22 04:46:54,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-08-22 04:46:54,267 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-08-22 04:46:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-08-22 04:46:54,267 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:54,267 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:54,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-08-22 04:46:54,268 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:54,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:54,268 INFO L82 PathProgramCache]: Analyzing trace with hash 866982410, now seen corresponding path program 25 times [2020-08-22 04:46:54,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:54,271 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846117994] [2020-08-22 04:46:54,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:54,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:54,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:54,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:54,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:54,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:56,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1094 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:56,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846117994] [2020-08-22 04:46:56,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:56,370 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-08-22 04:46:56,370 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961021836] [2020-08-22 04:46:56,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-08-22 04:46:56,371 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:56,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-08-22 04:46:56,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=636, Invalid=846, Unknown=0, NotChecked=0, Total=1482 [2020-08-22 04:46:56,372 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 39 states. [2020-08-22 04:46:56,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:56,740 INFO L93 Difference]: Finished difference Result 122 states and 128 transitions. [2020-08-22 04:46:56,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-08-22 04:46:56,741 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 92 [2020-08-22 04:46:56,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:56,742 INFO L225 Difference]: With dead ends: 122 [2020-08-22 04:46:56,742 INFO L226 Difference]: Without dead ends: 100 [2020-08-22 04:46:56,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=716, Invalid=1006, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 04:46:56,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-08-22 04:46:56,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-08-22 04:46:56,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 04:46:56,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 102 transitions. [2020-08-22 04:46:56,750 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 102 transitions. Word has length 92 [2020-08-22 04:46:56,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:56,750 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 102 transitions. [2020-08-22 04:46:56,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-08-22 04:46:56,751 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 102 transitions. [2020-08-22 04:46:56,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2020-08-22 04:46:56,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:56,752 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:56,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-08-22 04:46:56,752 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:56,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:56,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1891773492, now seen corresponding path program 26 times [2020-08-22 04:46:56,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:56,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072097170] [2020-08-22 04:46:56,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:56,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:56,824 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:56,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:59,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1161 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:46:59,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072097170] [2020-08-22 04:46:59,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:46:59,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-08-22 04:46:59,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088431089] [2020-08-22 04:46:59,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-08-22 04:46:59,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:46:59,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-08-22 04:46:59,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=672, Invalid=888, Unknown=0, NotChecked=0, Total=1560 [2020-08-22 04:46:59,159 INFO L87 Difference]: Start difference. First operand 99 states and 102 transitions. Second operand 40 states. [2020-08-22 04:46:59,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:46:59,507 INFO L93 Difference]: Finished difference Result 124 states and 130 transitions. [2020-08-22 04:46:59,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-08-22 04:46:59,507 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 94 [2020-08-22 04:46:59,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:46:59,508 INFO L225 Difference]: With dead ends: 124 [2020-08-22 04:46:59,509 INFO L226 Difference]: Without dead ends: 102 [2020-08-22 04:46:59,509 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=754, Invalid=1052, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 04:46:59,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-08-22 04:46:59,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-08-22 04:46:59,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 04:46:59,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 104 transitions. [2020-08-22 04:46:59,514 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 104 transitions. Word has length 94 [2020-08-22 04:46:59,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:46:59,515 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 104 transitions. [2020-08-22 04:46:59,515 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-08-22 04:46:59,515 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 104 transitions. [2020-08-22 04:46:59,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-08-22 04:46:59,516 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:46:59,516 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:46:59,516 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-08-22 04:46:59,516 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:46:59,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:46:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1233593614, now seen corresponding path program 27 times [2020-08-22 04:46:59,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:46:59,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605602219] [2020-08-22 04:46:59,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:46:59,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:59,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:46:59,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:46:59,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:46:59,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 1230 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:01,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605602219] [2020-08-22 04:47:01,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:01,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-08-22 04:47:01,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983501887] [2020-08-22 04:47:01,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-08-22 04:47:01,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:01,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-08-22 04:47:01,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=931, Unknown=0, NotChecked=0, Total=1640 [2020-08-22 04:47:01,905 INFO L87 Difference]: Start difference. First operand 101 states and 104 transitions. Second operand 41 states. [2020-08-22 04:47:02,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:02,261 INFO L93 Difference]: Finished difference Result 126 states and 132 transitions. [2020-08-22 04:47:02,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-08-22 04:47:02,262 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 96 [2020-08-22 04:47:02,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:02,263 INFO L225 Difference]: With dead ends: 126 [2020-08-22 04:47:02,263 INFO L226 Difference]: Without dead ends: 104 [2020-08-22 04:47:02,264 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=793, Invalid=1099, Unknown=0, NotChecked=0, Total=1892 [2020-08-22 04:47:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-08-22 04:47:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-08-22 04:47:02,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 04:47:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 106 transitions. [2020-08-22 04:47:02,269 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 106 transitions. Word has length 96 [2020-08-22 04:47:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:02,270 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 106 transitions. [2020-08-22 04:47:02,270 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-08-22 04:47:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 106 transitions. [2020-08-22 04:47:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-08-22 04:47:02,271 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:02,271 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:02,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-08-22 04:47:02,271 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:02,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:02,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1765724720, now seen corresponding path program 28 times [2020-08-22 04:47:02,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:02,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64571155] [2020-08-22 04:47:02,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:02,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:02,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:02,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:02,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:04,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1301 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:04,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64571155] [2020-08-22 04:47:04,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:04,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-08-22 04:47:04,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524789649] [2020-08-22 04:47:04,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-08-22 04:47:04,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:04,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-08-22 04:47:04,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=747, Invalid=975, Unknown=0, NotChecked=0, Total=1722 [2020-08-22 04:47:04,739 INFO L87 Difference]: Start difference. First operand 103 states and 106 transitions. Second operand 42 states. [2020-08-22 04:47:05,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:05,187 INFO L93 Difference]: Finished difference Result 128 states and 134 transitions. [2020-08-22 04:47:05,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-08-22 04:47:05,187 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 98 [2020-08-22 04:47:05,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:05,189 INFO L225 Difference]: With dead ends: 128 [2020-08-22 04:47:05,189 INFO L226 Difference]: Without dead ends: 106 [2020-08-22 04:47:05,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=833, Invalid=1147, Unknown=0, NotChecked=0, Total=1980 [2020-08-22 04:47:05,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-08-22 04:47:05,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-08-22 04:47:05,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 04:47:05,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2020-08-22 04:47:05,195 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 98 [2020-08-22 04:47:05,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:05,196 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2020-08-22 04:47:05,196 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-08-22 04:47:05,196 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2020-08-22 04:47:05,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-08-22 04:47:05,197 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:05,197 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:05,197 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-08-22 04:47:05,197 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:05,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:05,198 INFO L82 PathProgramCache]: Analyzing trace with hash 2107379218, now seen corresponding path program 29 times [2020-08-22 04:47:05,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:05,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398682683] [2020-08-22 04:47:05,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:05,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:05,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:05,273 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:05,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:07,759 INFO L134 CoverageAnalysis]: Checked inductivity of 1374 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-08-22 04:47:07,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398682683] [2020-08-22 04:47:07,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 04:47:07,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-08-22 04:47:07,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136049857] [2020-08-22 04:47:07,760 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-08-22 04:47:07,760 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 04:47:07,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-08-22 04:47:07,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=786, Invalid=1020, Unknown=0, NotChecked=0, Total=1806 [2020-08-22 04:47:07,762 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand 43 states. [2020-08-22 04:47:08,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 04:47:08,385 INFO L93 Difference]: Finished difference Result 130 states and 136 transitions. [2020-08-22 04:47:08,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-08-22 04:47:08,386 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 100 [2020-08-22 04:47:08,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 04:47:08,387 INFO L225 Difference]: With dead ends: 130 [2020-08-22 04:47:08,387 INFO L226 Difference]: Without dead ends: 108 [2020-08-22 04:47:08,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=874, Invalid=1196, Unknown=0, NotChecked=0, Total=2070 [2020-08-22 04:47:08,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-08-22 04:47:08,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-08-22 04:47:08,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 04:47:08,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-08-22 04:47:08,393 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 100 [2020-08-22 04:47:08,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 04:47:08,394 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-08-22 04:47:08,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-08-22 04:47:08,394 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-08-22 04:47:08,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-08-22 04:47:08,395 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 04:47:08,395 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 04:47:08,395 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-08-22 04:47:08,395 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 04:47:08,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 04:47:08,396 INFO L82 PathProgramCache]: Analyzing trace with hash 423618004, now seen corresponding path program 30 times [2020-08-22 04:47:08,396 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 04:47:08,396 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252537663] [2020-08-22 04:47:08,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 04:47:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:08,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 04:47:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 04:47:08,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2020-08-22 04:47:08,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat