/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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-examples/data_structures_set_multi_proc_trivial_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-177f698 [2020-08-22 00:42:40,300 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-22 00:42:40,303 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-22 00:42:40,345 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-22 00:42:40,346 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-22 00:42:40,355 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-22 00:42:40,357 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-22 00:42:40,360 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-22 00:42:40,363 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-22 00:42:40,366 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-22 00:42:40,367 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-22 00:42:40,368 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-22 00:42:40,368 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-22 00:42:40,371 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-22 00:42:40,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-22 00:42:40,375 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-22 00:42:40,377 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-22 00:42:40,378 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-22 00:42:40,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-22 00:42:40,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-22 00:42:40,391 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-22 00:42:40,392 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-22 00:42:40,393 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-22 00:42:40,394 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-22 00:42:40,406 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-08-22 00:42:40,422 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-22 00:42:40,425 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-22 00:42:40,428 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-22 00:42:40,429 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 00:42:40,461 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-22 00:42:40,461 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-22 00:42:40,462 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-22 00:42:40,462 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-22 00:42:40,463 INFO L138 SettingsManager]: * Use SBE=true [2020-08-22 00:42:40,463 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-22 00:42:40,463 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-22 00:42:40,463 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-22 00:42:40,464 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-22 00:42:40,464 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-22 00:42:40,464 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-22 00:42:40,464 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-22 00:42:40,464 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-22 00:42:40,465 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-22 00:42:40,465 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-22 00:42:40,465 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-22 00:42:40,465 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-22 00:42:40,465 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-22 00:42:40,466 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-22 00:42:40,466 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-22 00:42:40,466 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-22 00:42:40,466 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:42:40,466 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-22 00:42:40,467 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-22 00:42:40,467 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-22 00:42:40,467 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-22 00:42:40,467 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-22 00:42:40,467 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-22 00:42:40,468 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-22 00:42:40,468 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true; [2020-08-22 00:42:40,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-22 00:42:40,803 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-22 00:42:40,809 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-22 00:42:40,811 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-22 00:42:40,811 INFO L275 PluginConnector]: CDTParser initialized [2020-08-22 00:42:40,811 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 00:42:40,887 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5d6786b/2f0c1189c5c44643970d5c3d9fd3a020/FLAGb49441978 [2020-08-22 00:42:41,387 INFO L306 CDTParser]: Found 1 translation units. [2020-08-22 00:42:41,388 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-22 00:42:41,396 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5d6786b/2f0c1189c5c44643970d5c3d9fd3a020/FLAGb49441978 [2020-08-22 00:42:41,745 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5c5d6786b/2f0c1189c5c44643970d5c3d9fd3a020 [2020-08-22 00:42:41,755 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-22 00:42:41,757 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-22 00:42:41,758 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-22 00:42:41,758 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-22 00:42:41,762 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-22 00:42:41,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:42:41" (1/1) ... [2020-08-22 00:42:41,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@74dd283d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:41, skipping insertion in model container [2020-08-22 00:42:41,766 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.08 12:42:41" (1/1) ... [2020-08-22 00:42:41,774 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-22 00:42:41,795 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-22 00:42:42,000 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:42:42,009 INFO L203 MainTranslator]: Completed pre-run [2020-08-22 00:42:42,037 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-22 00:42:42,139 INFO L208 MainTranslator]: Completed translation [2020-08-22 00:42:42,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42 WrapperNode [2020-08-22 00:42:42,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-22 00:42:42,141 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-22 00:42:42,141 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-22 00:42:42,141 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-22 00:42:42,151 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,151 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,163 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,164 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,182 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,184 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... [2020-08-22 00:42:42,187 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-22 00:42:42,188 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-22 00:42:42,188 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-22 00:42:42,188 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-22 00:42:42,190 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-22 00:42:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-22 00:42:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-22 00:42:42,258 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-22 00:42:42,259 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-22 00:42:42,259 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-22 00:42:42,259 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-22 00:42:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-22 00:42:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-22 00:42:42,259 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-22 00:42:42,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-22 00:42:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-22 00:42:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-22 00:42:42,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-22 00:42:42,664 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-22 00:42:42,665 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-22 00:42:42,669 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:42:42 BoogieIcfgContainer [2020-08-22 00:42:42,670 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-22 00:42:42,671 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-22 00:42:42,671 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-22 00:42:42,674 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-22 00:42:42,675 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.08 12:42:41" (1/3) ... [2020-08-22 00:42:42,675 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171e94b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:42:42, skipping insertion in model container [2020-08-22 00:42:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.08 12:42:42" (2/3) ... [2020-08-22 00:42:42,676 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@171e94b4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.08 12:42:42, skipping insertion in model container [2020-08-22 00:42:42,676 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.08 12:42:42" (3/3) ... [2020-08-22 00:42:42,678 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-22 00:42:42,689 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-22 00:42:42,696 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-22 00:42:42,710 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-22 00:42:42,739 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-22 00:42:42,739 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-22 00:42:42,739 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-22 00:42:42,740 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-22 00:42:42,740 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-22 00:42:42,740 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-22 00:42:42,740 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-22 00:42:42,740 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-22 00:42:42,759 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-22 00:42:42,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-22 00:42:42,765 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:42,766 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:42,766 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:42,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:42,771 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-22 00:42:42,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:42,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1183491173] [2020-08-22 00:42:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:42,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:42,985 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 00:42:42,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1183491173] [2020-08-22 00:42:42,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:42:42,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-22 00:42:42,997 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988898908] [2020-08-22 00:42:43,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-22 00:42:43,005 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:43,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-22 00:42:43,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:42:43,023 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-22 00:42:43,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:43,352 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-22 00:42:43,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-22 00:42:43,355 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-22 00:42:43,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:43,367 INFO L225 Difference]: With dead ends: 150 [2020-08-22 00:42:43,367 INFO L226 Difference]: Without dead ends: 89 [2020-08-22 00:42:43,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-22 00:42:43,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-22 00:42:43,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-22 00:42:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-22 00:42:43,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-22 00:42:43,430 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-22 00:42:43,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:43,431 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-22 00:42:43,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-22 00:42:43,431 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-22 00:42:43,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-22 00:42:43,432 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:43,433 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:43,433 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-22 00:42:43,433 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:43,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:43,434 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-22 00:42:43,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:43,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698323213] [2020-08-22 00:42:43,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:43,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:43,495 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:43,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:43,504 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 00:42:43,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698323213] [2020-08-22 00:42:43,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:43,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-22 00:42:43,505 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402660420] [2020-08-22 00:42:43,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:42:43,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:43,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:42:43,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:42:43,508 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-22 00:42:43,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:43,842 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-22 00:42:43,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:42:43,843 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-22 00:42:43,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:43,847 INFO L225 Difference]: With dead ends: 170 [2020-08-22 00:42:43,847 INFO L226 Difference]: Without dead ends: 122 [2020-08-22 00:42:43,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:42:43,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-22 00:42:43,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-22 00:42:43,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-22 00:42:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-22 00:42:43,874 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-22 00:42:43,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:43,876 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-22 00:42:43,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:42:43,877 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-22 00:42:43,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-22 00:42:43,877 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:43,878 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:43,879 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-22 00:42:43,879 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:43,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:43,879 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-22 00:42:43,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:43,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1569533119] [2020-08-22 00:42:43,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:43,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:43,956 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:43,962 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 00:42:43,963 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1569533119] [2020-08-22 00:42:43,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:43,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 00:42:43,963 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810927845] [2020-08-22 00:42:43,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:42:43,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:43,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:42:43,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:42:43,965 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-22 00:42:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:44,272 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-22 00:42:44,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:42:44,273 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-22 00:42:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:44,276 INFO L225 Difference]: With dead ends: 203 [2020-08-22 00:42:44,277 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 00:42:44,278 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:42:44,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 00:42:44,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-22 00:42:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-22 00:42:44,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-22 00:42:44,290 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-22 00:42:44,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:44,291 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-22 00:42:44,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:42:44,291 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-22 00:42:44,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-22 00:42:44,292 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:44,292 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:44,292 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-22 00:42:44,292 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:44,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:44,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-22 00:42:44,293 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:44,293 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147102300] [2020-08-22 00:42:44,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:44,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:44,359 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:44,364 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 00:42:44,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147102300] [2020-08-22 00:42:44,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:44,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-22 00:42:44,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910612984] [2020-08-22 00:42:44,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:42:44,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:44,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:42:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:42:44,367 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-22 00:42:44,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:44,751 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-22 00:42:44,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:42:44,754 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-22 00:42:44,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:44,758 INFO L225 Difference]: With dead ends: 236 [2020-08-22 00:42:44,759 INFO L226 Difference]: Without dead ends: 188 [2020-08-22 00:42:44,761 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:42:44,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-22 00:42:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-22 00:42:44,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-22 00:42:44,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-22 00:42:44,787 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-22 00:42:44,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:44,787 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-22 00:42:44,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:42:44,787 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-22 00:42:44,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-22 00:42:44,788 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:44,789 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:44,789 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-22 00:42:44,789 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:44,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:44,790 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-22 00:42:44,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:44,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1525331539] [2020-08-22 00:42:44,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:44,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:44,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:44,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:44,892 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-22 00:42:44,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1525331539] [2020-08-22 00:42:44,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:42:44,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:42:44,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998912330] [2020-08-22 00:42:44,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:42:44,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:44,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:42:44,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:42:44,895 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-22 00:42:45,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:45,023 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-22 00:42:45,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-22 00:42:45,024 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-22 00:42:45,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:45,025 INFO L225 Difference]: With dead ends: 116 [2020-08-22 00:42:45,025 INFO L226 Difference]: Without dead ends: 67 [2020-08-22 00:42:45,026 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:42:45,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-22 00:42:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-22 00:42:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-22 00:42:45,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-22 00:42:45,034 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-22 00:42:45,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:45,034 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-22 00:42:45,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:42:45,035 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-22 00:42:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-22 00:42:45,036 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:45,036 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:45,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-22 00:42:45,037 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:45,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:45,037 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-22 00:42:45,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:45,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330158163] [2020-08-22 00:42:45,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:45,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-22 00:42:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:42:45,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,157 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 00:42:45,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330158163] [2020-08-22 00:42:45,158 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:45,158 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-22 00:42:45,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354713516] [2020-08-22 00:42:45,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-22 00:42:45,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:45,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-22 00:42:45,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-22 00:42:45,160 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-22 00:42:45,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:45,566 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-22 00:42:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-22 00:42:45,568 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-22 00:42:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:45,570 INFO L225 Difference]: With dead ends: 223 [2020-08-22 00:42:45,571 INFO L226 Difference]: Without dead ends: 173 [2020-08-22 00:42:45,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:42:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-22 00:42:45,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-22 00:42:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-22 00:42:45,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-22 00:42:45,589 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-22 00:42:45,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:45,590 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-22 00:42:45,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-22 00:42:45,591 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-22 00:42:45,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-22 00:42:45,594 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:45,594 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:45,595 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-22 00:42:45,595 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:45,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:45,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-22 00:42:45,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:45,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1979511928] [2020-08-22 00:42:45,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:45,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,729 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-22 00:42:45,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 00:42:45,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:45,759 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 00:42:45,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1979511928] [2020-08-22 00:42:45,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:45,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-22 00:42:45,761 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255038390] [2020-08-22 00:42:45,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-22 00:42:45,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:45,762 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-22 00:42:45,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-22 00:42:45,762 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-22 00:42:46,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:46,221 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-22 00:42:46,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-22 00:42:46,222 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-22 00:42:46,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:46,224 INFO L225 Difference]: With dead ends: 246 [2020-08-22 00:42:46,224 INFO L226 Difference]: Without dead ends: 196 [2020-08-22 00:42:46,225 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:42:46,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-22 00:42:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-22 00:42:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-22 00:42:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-22 00:42:46,247 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-22 00:42:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:46,247 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-22 00:42:46,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-22 00:42:46,248 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-22 00:42:46,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-22 00:42:46,252 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:46,252 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:46,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-22 00:42:46,253 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:46,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:46,253 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-22 00:42:46,253 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:46,254 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537413905] [2020-08-22 00:42:46,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:46,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:46,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:46,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-22 00:42:46,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:46,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:42:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:46,377 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 00:42:46,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537413905] [2020-08-22 00:42:46,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:46,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-22 00:42:46,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669880316] [2020-08-22 00:42:46,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-22 00:42:46,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:46,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-22 00:42:46,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:42:46,380 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-22 00:42:46,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:46,872 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-22 00:42:46,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-22 00:42:46,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-22 00:42:46,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:46,875 INFO L225 Difference]: With dead ends: 269 [2020-08-22 00:42:46,875 INFO L226 Difference]: Without dead ends: 219 [2020-08-22 00:42:46,876 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:42:46,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-22 00:42:46,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-22 00:42:46,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-22 00:42:46,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-22 00:42:46,886 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-22 00:42:46,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:46,887 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-22 00:42:46,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-22 00:42:46,887 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-22 00:42:46,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-22 00:42:46,888 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:46,888 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:46,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-22 00:42:46,888 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:46,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:46,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-22 00:42:46,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:46,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660279147] [2020-08-22 00:42:46,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:47,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-22 00:42:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 00:42:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,040 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 00:42:47,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660279147] [2020-08-22 00:42:47,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:47,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-22 00:42:47,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581032549] [2020-08-22 00:42:47,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-22 00:42:47,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:47,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-22 00:42:47,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-22 00:42:47,043 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-22 00:42:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:47,541 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-22 00:42:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-22 00:42:47,541 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-22 00:42:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:47,544 INFO L225 Difference]: With dead ends: 292 [2020-08-22 00:42:47,545 INFO L226 Difference]: Without dead ends: 242 [2020-08-22 00:42:47,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:42:47,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-22 00:42:47,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-22 00:42:47,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-22 00:42:47,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-22 00:42:47,557 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-22 00:42:47,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:47,558 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-22 00:42:47,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-22 00:42:47,558 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-22 00:42:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-22 00:42:47,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:47,560 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:47,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-22 00:42:47,560 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:47,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:47,561 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-22 00:42:47,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:47,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96853786] [2020-08-22 00:42:47,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:47,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:47,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-22 00:42:47,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:42:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:47,713 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 00:42:47,714 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96853786] [2020-08-22 00:42:47,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:47,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-22 00:42:47,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932558911] [2020-08-22 00:42:47,715 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-22 00:42:47,715 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:47,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-22 00:42:47,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-22 00:42:47,716 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-22 00:42:48,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:48,315 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-22 00:42:48,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-22 00:42:48,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-22 00:42:48,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:48,318 INFO L225 Difference]: With dead ends: 315 [2020-08-22 00:42:48,319 INFO L226 Difference]: Without dead ends: 265 [2020-08-22 00:42:48,320 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:42:48,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-22 00:42:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-22 00:42:48,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-22 00:42:48,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-22 00:42:48,340 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-22 00:42:48,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:48,340 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-22 00:42:48,340 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-22 00:42:48,340 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-22 00:42:48,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-22 00:42:48,344 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:48,344 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:48,344 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-22 00:42:48,344 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:48,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:48,345 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-22 00:42:48,345 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:48,346 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [324661239] [2020-08-22 00:42:48,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:48,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:48,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:48,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:48,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-22 00:42:48,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 00:42:48,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:48,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [324661239] [2020-08-22 00:42:48,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:48,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-22 00:42:48,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577537587] [2020-08-22 00:42:48,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-22 00:42:48,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:48,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-22 00:42:48,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-22 00:42:48,529 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-22 00:42:49,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:49,186 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-22 00:42:49,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-22 00:42:49,187 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-22 00:42:49,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:49,190 INFO L225 Difference]: With dead ends: 338 [2020-08-22 00:42:49,190 INFO L226 Difference]: Without dead ends: 288 [2020-08-22 00:42:49,191 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:42:49,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-22 00:42:49,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-22 00:42:49,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-22 00:42:49,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-22 00:42:49,200 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-22 00:42:49,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:49,200 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-22 00:42:49,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-22 00:42:49,200 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-22 00:42:49,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-22 00:42:49,201 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:49,201 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:49,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-22 00:42:49,202 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:49,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:49,202 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-22 00:42:49,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:49,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357895128] [2020-08-22 00:42:49,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:49,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:49,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:49,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-22 00:42:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:49,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 00:42:49,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:49,377 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:49,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357895128] [2020-08-22 00:42:49,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:49,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-22 00:42:49,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564271112] [2020-08-22 00:42:49,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-22 00:42:49,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:49,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-22 00:42:49,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-22 00:42:49,382 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-22 00:42:50,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:50,140 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-22 00:42:50,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-22 00:42:50,140 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-22 00:42:50,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:50,143 INFO L225 Difference]: With dead ends: 361 [2020-08-22 00:42:50,143 INFO L226 Difference]: Without dead ends: 311 [2020-08-22 00:42:50,144 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:42:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-22 00:42:50,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-22 00:42:50,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-22 00:42:50,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-22 00:42:50,153 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-22 00:42:50,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:50,153 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-22 00:42:50,154 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-22 00:42:50,154 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-22 00:42:50,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-22 00:42:50,155 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:50,155 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:50,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-22 00:42:50,155 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:50,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:50,155 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-22 00:42:50,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:50,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142616567] [2020-08-22 00:42:50,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:50,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:50,295 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:50,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:50,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-22 00:42:50,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:50,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:42:50,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:50,330 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:50,331 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142616567] [2020-08-22 00:42:50,331 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:50,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-22 00:42:50,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668293799] [2020-08-22 00:42:50,332 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-22 00:42:50,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-22 00:42:50,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-22 00:42:50,334 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-22 00:42:51,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:51,176 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-22 00:42:51,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-22 00:42:51,177 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-22 00:42:51,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:51,180 INFO L225 Difference]: With dead ends: 384 [2020-08-22 00:42:51,181 INFO L226 Difference]: Without dead ends: 334 [2020-08-22 00:42:51,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:42:51,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-22 00:42:51,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-22 00:42:51,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-22 00:42:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-22 00:42:51,194 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-22 00:42:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:51,195 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-22 00:42:51,195 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-22 00:42:51,195 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-22 00:42:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-22 00:42:51,196 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:51,196 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:51,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-22 00:42:51,197 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:51,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:51,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-22 00:42:51,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:51,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1533302310] [2020-08-22 00:42:51,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:51,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:51,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:51,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-22 00:42:51,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:51,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 00:42:51,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:51,424 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:51,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1533302310] [2020-08-22 00:42:51,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:51,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-22 00:42:51,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196360144] [2020-08-22 00:42:51,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-22 00:42:51,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:51,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-22 00:42:51,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-22 00:42:51,428 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-22 00:42:52,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:52,292 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-22 00:42:52,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-22 00:42:52,293 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-22 00:42:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:52,296 INFO L225 Difference]: With dead ends: 407 [2020-08-22 00:42:52,296 INFO L226 Difference]: Without dead ends: 357 [2020-08-22 00:42:52,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:42:52,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-22 00:42:52,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-22 00:42:52,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-22 00:42:52,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-22 00:42:52,311 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-22 00:42:52,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:52,312 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-22 00:42:52,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-22 00:42:52,312 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-22 00:42:52,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-22 00:42:52,313 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:52,314 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:52,314 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-22 00:42:52,314 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:52,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:52,315 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-22 00:42:52,315 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:52,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079040699] [2020-08-22 00:42:52,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:52,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:52,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:52,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-22 00:42:52,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:52,592 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:42:52,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:52,600 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:52,601 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079040699] [2020-08-22 00:42:52,601 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:52,601 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-22 00:42:52,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799121634] [2020-08-22 00:42:52,602 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-22 00:42:52,602 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:52,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-22 00:42:52,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-22 00:42:52,603 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-22 00:42:53,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:53,658 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-22 00:42:53,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-22 00:42:53,659 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-22 00:42:53,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:53,662 INFO L225 Difference]: With dead ends: 430 [2020-08-22 00:42:53,662 INFO L226 Difference]: Without dead ends: 380 [2020-08-22 00:42:53,665 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:42:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-22 00:42:53,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-22 00:42:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-22 00:42:53,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-22 00:42:53,675 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-22 00:42:53,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:53,676 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-22 00:42:53,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-22 00:42:53,676 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-22 00:42:53,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-22 00:42:53,676 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:53,677 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:53,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-22 00:42:53,677 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:53,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:53,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-22 00:42:53,678 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:53,678 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [640672602] [2020-08-22 00:42:53,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:53,875 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:53,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:53,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-22 00:42:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:53,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:42:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:53,907 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:53,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [640672602] [2020-08-22 00:42:53,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:53,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-22 00:42:53,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867136010] [2020-08-22 00:42:53,910 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-22 00:42:53,910 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:53,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-22 00:42:53,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-22 00:42:53,912 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-22 00:42:54,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:54,794 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-22 00:42:54,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-22 00:42:54,795 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-22 00:42:54,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:54,797 INFO L225 Difference]: With dead ends: 453 [2020-08-22 00:42:54,798 INFO L226 Difference]: Without dead ends: 403 [2020-08-22 00:42:54,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:42:54,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-22 00:42:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-22 00:42:54,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-22 00:42:54,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-22 00:42:54,809 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-22 00:42:54,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:54,810 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-22 00:42:54,810 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-22 00:42:54,811 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-22 00:42:54,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-22 00:42:54,811 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:54,811 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:54,812 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-22 00:42:54,812 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:54,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:54,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-22 00:42:54,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:54,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453797408] [2020-08-22 00:42:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:54,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:55,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:55,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:55,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-22 00:42:55,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:55,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 00:42:55,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:55,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453797408] [2020-08-22 00:42:55,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:55,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-22 00:42:55,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696901321] [2020-08-22 00:42:55,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-22 00:42:55,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:55,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-22 00:42:55,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-22 00:42:55,028 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-22 00:42:55,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:55,938 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-22 00:42:55,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-22 00:42:55,939 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-22 00:42:55,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:55,943 INFO L225 Difference]: With dead ends: 476 [2020-08-22 00:42:55,943 INFO L226 Difference]: Without dead ends: 426 [2020-08-22 00:42:55,945 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:42:55,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-22 00:42:55,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-22 00:42:55,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-22 00:42:55,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-22 00:42:55,966 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-22 00:42:55,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:55,967 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-22 00:42:55,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-22 00:42:55,967 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-22 00:42:55,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-22 00:42:55,968 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:55,969 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:55,969 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-22 00:42:55,969 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:55,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:55,970 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-22 00:42:55,970 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:55,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [484596427] [2020-08-22 00:42:55,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:56,327 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:56,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:56,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-22 00:42:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:56,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 00:42:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:56,364 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:56,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [484596427] [2020-08-22 00:42:56,364 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:56,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-22 00:42:56,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144810787] [2020-08-22 00:42:56,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-22 00:42:56,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:56,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-22 00:42:56,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-22 00:42:56,373 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-22 00:42:57,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:57,503 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-22 00:42:57,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-22 00:42:57,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-22 00:42:57,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:57,510 INFO L225 Difference]: With dead ends: 499 [2020-08-22 00:42:57,510 INFO L226 Difference]: Without dead ends: 449 [2020-08-22 00:42:57,511 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:42:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-22 00:42:57,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-22 00:42:57,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-22 00:42:57,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-22 00:42:57,520 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-22 00:42:57,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:57,521 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-22 00:42:57,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-22 00:42:57,521 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-22 00:42:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-22 00:42:57,522 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:57,522 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:57,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-22 00:42:57,522 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-22 00:42:57,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:57,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106394333] [2020-08-22 00:42:57,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:57,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:57,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:57,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:57,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-22 00:42:57,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:57,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:42:57,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:57,811 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:57,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106394333] [2020-08-22 00:42:57,811 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:57,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-22 00:42:57,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147098427] [2020-08-22 00:42:57,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-22 00:42:57,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:57,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-22 00:42:57,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-22 00:42:57,813 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-22 00:42:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:42:59,061 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-22 00:42:59,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-22 00:42:59,062 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-22 00:42:59,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:42:59,066 INFO L225 Difference]: With dead ends: 522 [2020-08-22 00:42:59,066 INFO L226 Difference]: Without dead ends: 472 [2020-08-22 00:42:59,067 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=219, Invalid=333, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:42:59,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-22 00:42:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-22 00:42:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-22 00:42:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-22 00:42:59,078 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-22 00:42:59,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:42:59,079 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-22 00:42:59,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-22 00:42:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-22 00:42:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-22 00:42:59,080 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:42:59,080 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:42:59,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-22 00:42:59,081 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:42:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:42:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-22 00:42:59,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:42:59,082 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702633038] [2020-08-22 00:42:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:42:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:59,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:42:59,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:59,344 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-22 00:42:59,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:59,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 00:42:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:42:59,368 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:42:59,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702633038] [2020-08-22 00:42:59,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:42:59,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-22 00:42:59,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820810901] [2020-08-22 00:42:59,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-22 00:42:59,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:42:59,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-22 00:42:59,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-22 00:42:59,371 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-22 00:43:00,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:00,728 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-22 00:43:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-22 00:43:00,729 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-22 00:43:00,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:00,732 INFO L225 Difference]: With dead ends: 545 [2020-08-22 00:43:00,733 INFO L226 Difference]: Without dead ends: 495 [2020-08-22 00:43:00,734 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:43:00,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-22 00:43:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-22 00:43:00,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-22 00:43:00,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-22 00:43:00,747 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-22 00:43:00,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:00,747 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-22 00:43:00,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-22 00:43:00,747 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-22 00:43:00,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-22 00:43:00,748 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:00,748 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:00,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-22 00:43:00,749 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:00,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:00,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-22 00:43:00,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:00,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1397336073] [2020-08-22 00:43:00,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:00,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:01,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:01,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:01,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-22 00:43:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:01,069 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 00:43:01,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:01,076 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:01,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1397336073] [2020-08-22 00:43:01,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:01,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-22 00:43:01,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456024694] [2020-08-22 00:43:01,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-22 00:43:01,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:01,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-22 00:43:01,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-22 00:43:01,080 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-22 00:43:02,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:02,290 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-22 00:43:02,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-22 00:43:02,291 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-22 00:43:02,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:02,294 INFO L225 Difference]: With dead ends: 568 [2020-08-22 00:43:02,294 INFO L226 Difference]: Without dead ends: 518 [2020-08-22 00:43:02,295 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:43:02,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-22 00:43:02,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-22 00:43:02,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-22 00:43:02,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-22 00:43:02,306 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-22 00:43:02,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:02,307 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-22 00:43:02,307 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-22 00:43:02,307 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-22 00:43:02,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-22 00:43:02,308 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:02,308 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:02,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-22 00:43:02,308 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:02,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:02,309 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-22 00:43:02,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:02,309 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786572809] [2020-08-22 00:43:02,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:02,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:02,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:02,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-22 00:43:02,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:02,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:43:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:02,668 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:02,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786572809] [2020-08-22 00:43:02,670 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:02,670 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-22 00:43:02,670 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422301793] [2020-08-22 00:43:02,671 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-22 00:43:02,671 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:02,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-22 00:43:02,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-22 00:43:02,672 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-22 00:43:03,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:03,916 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-22 00:43:03,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-22 00:43:03,918 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-22 00:43:03,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:03,922 INFO L225 Difference]: With dead ends: 591 [2020-08-22 00:43:03,923 INFO L226 Difference]: Without dead ends: 541 [2020-08-22 00:43:03,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:43:03,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-22 00:43:03,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-22 00:43:03,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-22 00:43:03,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-22 00:43:03,934 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-22 00:43:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:03,935 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-22 00:43:03,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-22 00:43:03,935 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-22 00:43:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-22 00:43:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:03,936 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:03,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-22 00:43:03,936 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:03,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:03,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-22 00:43:03,937 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:03,937 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507477040] [2020-08-22 00:43:03,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:03,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:04,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-22 00:43:04,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:04,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 00:43:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:04,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507477040] [2020-08-22 00:43:04,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:04,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-22 00:43:04,314 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814223804] [2020-08-22 00:43:04,315 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-22 00:43:04,318 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:04,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-22 00:43:04,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-22 00:43:04,319 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-22 00:43:05,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:05,873 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-22 00:43:05,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-22 00:43:05,873 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-22 00:43:05,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:05,878 INFO L225 Difference]: With dead ends: 614 [2020-08-22 00:43:05,878 INFO L226 Difference]: Without dead ends: 564 [2020-08-22 00:43:05,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=309, Invalid=447, Unknown=0, NotChecked=0, Total=756 [2020-08-22 00:43:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-22 00:43:05,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-22 00:43:05,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-22 00:43:05,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-22 00:43:05,890 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-22 00:43:05,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:05,890 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-22 00:43:05,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-22 00:43:05,890 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-22 00:43:05,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-22 00:43:05,891 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:05,891 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:05,891 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-22 00:43:05,892 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:05,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:05,892 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-22 00:43:05,892 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:05,892 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1016114665] [2020-08-22 00:43:05,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:05,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:06,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:06,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-22 00:43:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:06,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 00:43:06,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:06,309 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:06,309 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1016114665] [2020-08-22 00:43:06,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:06,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-22 00:43:06,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86577890] [2020-08-22 00:43:06,310 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-22 00:43:06,310 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:06,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-22 00:43:06,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-22 00:43:06,311 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-22 00:43:08,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:08,076 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-22 00:43:08,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-22 00:43:08,077 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-22 00:43:08,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:08,080 INFO L225 Difference]: With dead ends: 637 [2020-08-22 00:43:08,080 INFO L226 Difference]: Without dead ends: 587 [2020-08-22 00:43:08,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-22 00:43:08,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-22 00:43:08,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-22 00:43:08,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-22 00:43:08,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-22 00:43:08,093 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-22 00:43:08,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:08,093 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-22 00:43:08,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-22 00:43:08,093 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-22 00:43:08,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-22 00:43:08,094 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:08,094 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:08,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-22 00:43:08,094 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:08,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:08,095 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-22 00:43:08,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:08,095 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1904149178] [2020-08-22 00:43:08,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:08,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:08,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:08,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-22 00:43:08,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:08,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:43:08,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:08,526 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:08,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1904149178] [2020-08-22 00:43:08,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:08,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-22 00:43:08,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221584550] [2020-08-22 00:43:08,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-22 00:43:08,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:08,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-22 00:43:08,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-22 00:43:08,528 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-22 00:43:10,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:10,363 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-22 00:43:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-22 00:43:10,364 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-22 00:43:10,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:10,367 INFO L225 Difference]: With dead ends: 660 [2020-08-22 00:43:10,367 INFO L226 Difference]: Without dead ends: 610 [2020-08-22 00:43:10,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-22 00:43:10,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-22 00:43:10,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-22 00:43:10,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-22 00:43:10,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-22 00:43:10,379 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-22 00:43:10,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:10,379 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-22 00:43:10,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-22 00:43:10,379 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-22 00:43:10,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-22 00:43:10,380 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:10,380 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:10,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-22 00:43:10,381 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:10,381 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-22 00:43:10,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:10,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1626798174] [2020-08-22 00:43:10,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:10,804 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:10,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:10,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-22 00:43:10,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:10,829 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 00:43:10,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:10,839 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:10,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1626798174] [2020-08-22 00:43:10,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:10,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-22 00:43:10,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6495616] [2020-08-22 00:43:10,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-22 00:43:10,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:10,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-22 00:43:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-22 00:43:10,842 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-22 00:43:12,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:12,832 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-22 00:43:12,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-22 00:43:12,833 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-22 00:43:12,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:12,839 INFO L225 Difference]: With dead ends: 683 [2020-08-22 00:43:12,839 INFO L226 Difference]: Without dead ends: 633 [2020-08-22 00:43:12,841 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-22 00:43:12,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-22 00:43:12,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-22 00:43:12,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-22 00:43:12,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-22 00:43:12,861 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-22 00:43:12,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:12,861 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-22 00:43:12,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-22 00:43:12,862 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-22 00:43:12,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-22 00:43:12,863 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:12,864 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:12,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-22 00:43:12,864 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:12,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:12,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-22 00:43:12,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:12,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984800758] [2020-08-22 00:43:12,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:13,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:13,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:13,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-22 00:43:13,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:13,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 00:43:13,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:13,483 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:13,483 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984800758] [2020-08-22 00:43:13,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:13,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-22 00:43:13,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999568951] [2020-08-22 00:43:13,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-22 00:43:13,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:13,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-22 00:43:13,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-22 00:43:13,486 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-22 00:43:16,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:16,149 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-22 00:43:16,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-22 00:43:16,150 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-22 00:43:16,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:16,155 INFO L225 Difference]: With dead ends: 706 [2020-08-22 00:43:16,155 INFO L226 Difference]: Without dead ends: 656 [2020-08-22 00:43:16,157 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-22 00:43:16,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-22 00:43:16,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-22 00:43:16,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-22 00:43:16,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-22 00:43:16,176 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-22 00:43:16,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:16,176 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-22 00:43:16,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-22 00:43:16,177 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-22 00:43:16,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-22 00:43:16,178 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:16,179 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:16,179 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-22 00:43:16,179 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:16,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:16,181 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-22 00:43:16,181 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:16,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706826610] [2020-08-22 00:43:16,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:16,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:16,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:16,786 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-22 00:43:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:16,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:43:16,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:16,816 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:16,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706826610] [2020-08-22 00:43:16,817 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:16,817 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-22 00:43:16,817 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549697042] [2020-08-22 00:43:16,817 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-22 00:43:16,817 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:16,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-22 00:43:16,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-22 00:43:16,818 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-22 00:43:18,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:18,951 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-22 00:43:18,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-22 00:43:18,951 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-22 00:43:18,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:18,954 INFO L225 Difference]: With dead ends: 729 [2020-08-22 00:43:18,954 INFO L226 Difference]: Without dead ends: 679 [2020-08-22 00:43:18,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-22 00:43:18,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-22 00:43:18,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-22 00:43:18,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-22 00:43:18,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-22 00:43:18,965 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-22 00:43:18,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:18,965 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-22 00:43:18,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-22 00:43:18,965 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-22 00:43:18,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-22 00:43:18,966 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:18,966 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:18,966 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-22 00:43:18,967 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:18,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:18,967 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-22 00:43:18,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:18,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839961702] [2020-08-22 00:43:18,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:18,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:19,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:19,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-22 00:43:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:19,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-22 00:43:19,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:19,513 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-22 00:43:19,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839961702] [2020-08-22 00:43:19,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:19,514 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-22 00:43:19,514 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063550316] [2020-08-22 00:43:19,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-22 00:43:19,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:19,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-22 00:43:19,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-22 00:43:19,516 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-22 00:43:21,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:21,332 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-22 00:43:21,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-22 00:43:21,333 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-22 00:43:21,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:21,336 INFO L225 Difference]: With dead ends: 752 [2020-08-22 00:43:21,336 INFO L226 Difference]: Without dead ends: 702 [2020-08-22 00:43:21,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-22 00:43:21,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-22 00:43:21,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-22 00:43:21,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-22 00:43:21,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-22 00:43:21,348 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-22 00:43:21,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:21,349 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-22 00:43:21,349 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-22 00:43:21,349 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-22 00:43:21,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-22 00:43:21,350 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:21,350 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:21,350 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-22 00:43:21,351 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:21,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:21,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-22 00:43:21,351 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:21,351 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [132152526] [2020-08-22 00:43:21,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:21,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:21,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,402 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-22 00:43:21,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-22 00:43:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 00:43:21,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [132152526] [2020-08-22 00:43:21,417 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:43:21,417 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-22 00:43:21,417 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675904583] [2020-08-22 00:43:21,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-22 00:43:21,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:21,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-22 00:43:21,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-22 00:43:21,418 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-22 00:43:21,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:21,575 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-22 00:43:21,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-22 00:43:21,575 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-22 00:43:21,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:21,576 INFO L225 Difference]: With dead ends: 177 [2020-08-22 00:43:21,576 INFO L226 Difference]: Without dead ends: 132 [2020-08-22 00:43:21,577 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 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 00:43:21,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-22 00:43:21,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-22 00:43:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-22 00:43:21,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-22 00:43:21,582 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-22 00:43:21,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:21,582 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-22 00:43:21,582 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-22 00:43:21,583 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-22 00:43:21,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-22 00:43:21,583 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:21,584 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:21,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-22 00:43:21,584 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:21,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:21,584 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-22 00:43:21,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:21,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890473618] [2020-08-22 00:43:21,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:21,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-22 00:43:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-22 00:43:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,652 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-22 00:43:21,653 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890473618] [2020-08-22 00:43:21,653 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-22 00:43:21,653 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-22 00:43:21,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181485148] [2020-08-22 00:43:21,654 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:43:21,654 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:21,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:43:21,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:43:21,654 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-22 00:43:21,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:21,867 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-22 00:43:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:43:21,870 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-22 00:43:21,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:21,871 INFO L225 Difference]: With dead ends: 200 [2020-08-22 00:43:21,871 INFO L226 Difference]: Without dead ends: 155 [2020-08-22 00:43:21,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 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 00:43:21,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-22 00:43:21,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-22 00:43:21,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-22 00:43:21,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-22 00:43:21,879 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-22 00:43:21,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:21,880 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-22 00:43:21,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:43:21,880 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-22 00:43:21,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 00:43:21,881 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:21,881 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:21,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-22 00:43:21,882 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:21,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:21,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-22 00:43:21,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:21,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971833619] [2020-08-22 00:43:21,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:21,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,948 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:21,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:43:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 00:43:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 00:43:21,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971833619] [2020-08-22 00:43:21,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:43:21,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-22 00:43:21,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421795834] [2020-08-22 00:43:21,979 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-22 00:43:21,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:21,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-22 00:43:21,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-22 00:43:21,980 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-22 00:43:22,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:22,124 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-22 00:43:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-22 00:43:22,124 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-22 00:43:22,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:22,125 INFO L225 Difference]: With dead ends: 187 [2020-08-22 00:43:22,125 INFO L226 Difference]: Without dead ends: 139 [2020-08-22 00:43:22,126 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-08-22 00:43:22,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-22 00:43:22,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-22 00:43:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-22 00:43:22,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-22 00:43:22,133 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-22 00:43:22,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:22,134 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-22 00:43:22,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-22 00:43:22,134 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-22 00:43:22,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-22 00:43:22,135 INFO L414 BasicCegarLoop]: Found error trace [2020-08-22 00:43:22,135 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-22 00:43:22,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-22 00:43:22,135 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-22 00:43:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-22 00:43:22,136 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-22 00:43:22,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-22 00:43:22,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952728917] [2020-08-22 00:43:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-22 00:43:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:22,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-22 00:43:22,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:22,205 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-22 00:43:22,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:22,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-22 00:43:22,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-22 00:43:22,244 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-22 00:43:22,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952728917] [2020-08-22 00:43:22,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-22 00:43:22,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-22 00:43:22,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918005726] [2020-08-22 00:43:22,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-22 00:43:22,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-22 00:43:22,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-22 00:43:22,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-22 00:43:22,246 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-22 00:43:22,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-22 00:43:22,372 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-22 00:43:22,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-22 00:43:22,373 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-22 00:43:22,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-22 00:43:22,374 INFO L225 Difference]: With dead ends: 157 [2020-08-22 00:43:22,374 INFO L226 Difference]: Without dead ends: 0 [2020-08-22 00:43:22,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-08-22 00:43:22,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-22 00:43:22,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-22 00:43:22,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-22 00:43:22,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-22 00:43:22,376 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-22 00:43:22,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-22 00:43:22,376 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-22 00:43:22,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-22 00:43:22,376 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-22 00:43:22,376 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-22 00:43:22,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-22 00:43:22,379 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-22 00:43:22,604 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-22 00:43:22,604 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-22 00:43:22,604 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-22 00:43:22,604 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-22 00:43:22,604 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-22 00:43:22,604 INFO L264 CegarLoopResult]: At program point L11-3(lines 11 13) the Hoare annotation is: (and (<= 0 elem_exists_~i~0) (= elem_exists_~size |elem_exists_#in~size|)) [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L264 CegarLoopResult]: At program point ULTIMATE.initENTRY(line -1) the Hoare annotation is: (and (= |old(#NULL.base)| |#NULL.base|) (= |#NULL.offset| |old(#NULL.offset)|) (= |old(#valid)| |#valid|)) [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-22 00:43:22,605 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-22 00:43:22,605 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-22 00:43:22,606 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-22 00:43:22,606 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-22 00:43:22,606 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-22 00:43:22,606 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-22 00:43:22,606 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-22 00:43:22,606 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,606 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-22 00:43:22,607 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,607 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-22 00:43:22,607 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-22 00:43:22,607 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,607 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-22 00:43:22,607 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-22 00:43:22,607 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-22 00:43:22,607 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-22 00:43:22,608 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-22 00:43:22,608 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-22 00:43:22,608 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-22 00:43:22,608 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-22 00:43:22,608 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-22 00:43:22,608 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-22 00:43:22,608 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-22 00:43:22,608 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-22 00:43:22,609 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-22 00:43:22,609 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-22 00:43:22,609 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-22 00:43:22,609 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,609 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-22 00:43:22,609 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,609 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-22 00:43:22,609 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-22 00:43:22,610 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-22 00:43:22,610 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-22 00:43:22,610 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-22 00:43:22,611 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-22 00:43:22,611 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-22 00:43:22,611 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-22 00:43:22,611 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-22 00:43:22,611 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-22 00:43:22,611 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-22 00:43:22,632 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.08 12:43:22 BoogieIcfgContainer [2020-08-22 00:43:22,632 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-22 00:43:22,634 INFO L168 Benchmark]: Toolchain (without parser) took 40877.36 ms. Allocated memory was 142.1 MB in the beginning and 443.0 MB in the end (delta: 300.9 MB). Free memory was 103.3 MB in the beginning and 198.4 MB in the end (delta: -95.1 MB). Peak memory consumption was 205.8 MB. Max. memory is 7.1 GB. [2020-08-22 00:43:22,635 INFO L168 Benchmark]: CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-22 00:43:22,636 INFO L168 Benchmark]: CACSL2BoogieTranslator took 382.63 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 103.1 MB in the beginning and 182.9 MB in the end (delta: -79.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. [2020-08-22 00:43:22,636 INFO L168 Benchmark]: Boogie Preprocessor took 46.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 179.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. [2020-08-22 00:43:22,636 INFO L168 Benchmark]: RCFGBuilder took 481.99 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 156.3 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. [2020-08-22 00:43:22,637 INFO L168 Benchmark]: TraceAbstraction took 39961.18 ms. Allocated memory was 203.9 MB in the beginning and 443.0 MB in the end (delta: 239.1 MB). Free memory was 156.3 MB in the beginning and 198.4 MB in the end (delta: -42.2 MB). Peak memory consumption was 196.9 MB. Max. memory is 7.1 GB. [2020-08-22 00:43:22,639 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19 ms. Allocated memory is still 142.1 MB. Free memory was 121.8 MB in the beginning and 121.6 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 382.63 ms. Allocated memory was 142.1 MB in the beginning and 203.9 MB in the end (delta: 61.9 MB). Free memory was 103.1 MB in the beginning and 182.9 MB in the end (delta: -79.8 MB). Peak memory consumption was 21.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.40 ms. Allocated memory is still 203.9 MB. Free memory was 182.9 MB in the beginning and 179.9 MB in the end (delta: 2.9 MB). Peak memory consumption was 2.9 MB. Max. memory is 7.1 GB. * RCFGBuilder took 481.99 ms. Allocated memory is still 203.9 MB. Free memory was 179.9 MB in the beginning and 156.3 MB in the end (delta: 23.7 MB). Peak memory consumption was 23.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39961.18 ms. Allocated memory was 203.9 MB in the beginning and 443.0 MB in the end (delta: 239.1 MB). Free memory was 156.3 MB in the beginning and 198.4 MB in the end (delta: -42.2 MB). Peak memory consumption was 196.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.6s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.9s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...