/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=BIGGEST --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 [2020-08-21 17:26:59,049 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 17:26:59,053 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 17:26:59,102 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 17:26:59,103 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 17:26:59,115 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 17:26:59,117 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 17:26:59,119 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 17:26:59,122 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 17:26:59,123 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 17:26:59,124 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 17:26:59,126 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 17:26:59,127 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 17:26:59,129 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 17:26:59,130 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 17:26:59,133 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 17:26:59,135 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 17:26:59,137 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 17:26:59,139 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 17:26:59,145 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 17:26:59,148 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 17:26:59,149 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 17:26:59,150 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 17:26:59,151 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 17:26:59,156 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 17:26:59,156 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 17:26:59,156 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 17:26:59,159 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 17:26:59,160 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 17:26:59,162 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 17:26:59,167 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 17:26:59,168 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 17:26:59,169 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 17:26:59,170 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 [2020-08-21 17:26:59,212 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 17:26:59,213 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 17:26:59,215 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 17:26:59,215 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 17:26:59,215 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 17:26:59,216 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 17:26:59,216 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 17:26:59,216 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 17:26:59,217 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 17:26:59,217 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 17:26:59,218 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 17:26:59,218 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 17:26:59,218 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 17:26:59,219 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 17:26:59,219 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 17:26:59,219 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 17:26:59,219 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 17:26:59,219 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 17:26:59,220 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 17:26:59,220 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 17:26:59,220 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 17:26:59,220 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 17:26:59,220 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 17:26:59,221 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 17:26:59,222 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=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true; [2020-08-21 17:26:59,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 17:26:59,512 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 17:26:59,518 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 17:26:59,520 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 17:26:59,520 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 17:26:59,521 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 17:26:59,588 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ffa63b1/99991387e5ef4eccaeb16f3dcdefbe16/FLAG77433739c [2020-08-21 17:27:00,015 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 17:27:00,016 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 17:27:00,025 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ffa63b1/99991387e5ef4eccaeb16f3dcdefbe16/FLAG77433739c [2020-08-21 17:27:00,383 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b1ffa63b1/99991387e5ef4eccaeb16f3dcdefbe16 [2020-08-21 17:27:00,394 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 17:27:00,395 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 17:27:00,396 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:00,397 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 17:27:00,400 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 17:27:00,401 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,404 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2362c63d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00, skipping insertion in model container [2020-08-21 17:27:00,404 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,411 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 17:27:00,431 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 17:27:00,611 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:00,621 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 17:27:00,647 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 17:27:00,664 INFO L208 MainTranslator]: Completed translation [2020-08-21 17:27:00,664 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00 WrapperNode [2020-08-21 17:27:00,664 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 17:27:00,665 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 17:27:00,665 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 17:27:00,665 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 17:27:00,753 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,753 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,761 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,762 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,772 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,780 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,782 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (1/1) ... [2020-08-21 17:27:00,787 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 17:27:00,788 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 17:27:00,788 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 17:27:00,788 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 17:27:00,789 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (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 [2020-08-21 17:27:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 17:27:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 17:27:00,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 17:27:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-21 17:27:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-21 17:27:00,855 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 17:27:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 17:27:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 17:27:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 17:27:00,855 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 17:27:00,856 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 17:27:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 17:27:00,857 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 17:27:01,243 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 17:27:01,244 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-21 17:27:01,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:01 BoogieIcfgContainer [2020-08-21 17:27:01,251 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 17:27:01,253 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 17:27:01,253 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 17:27:01,256 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 17:27:01,256 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 05:27:00" (1/3) ... [2020-08-21 17:27:01,257 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cba34bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:01, skipping insertion in model container [2020-08-21 17:27:01,257 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 05:27:00" (2/3) ... [2020-08-21 17:27:01,258 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5cba34bc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:27:01, skipping insertion in model container [2020-08-21 17:27:01,258 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:27:01" (3/3) ... [2020-08-21 17:27:01,260 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-21 17:27:01,270 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 17:27:01,278 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 17:27:01,292 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 17:27:01,318 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 17:27:01,318 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 17:27:01,318 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 17:27:01,318 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 17:27:01,318 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 17:27:01,319 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 17:27:01,319 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 17:27:01,319 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 17:27:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 17:27:01,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 17:27:01,343 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:01,344 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:01,344 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:01,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:01,349 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-21 17:27:01,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:01,358 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926447127] [2020-08-21 17:27:01,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:01,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:01,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:01,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:01,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926447127] [2020-08-21 17:27:01,554 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:01,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 17:27:01,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582850939] [2020-08-21 17:27:01,560 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 17:27:01,561 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:01,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 17:27:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 17:27:01,578 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 17:27:01,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:01,865 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-21 17:27:01,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 17:27:01,867 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 17:27:01,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:01,879 INFO L225 Difference]: With dead ends: 150 [2020-08-21 17:27:01,879 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 17:27:01,884 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 [2020-08-21 17:27:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 17:27:01,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-21 17:27:01,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 17:27:01,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-21 17:27:01,939 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-21 17:27:01,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:01,940 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-21 17:27:01,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 17:27:01,940 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-21 17:27:01,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 17:27:01,941 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:01,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:01,942 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 17:27:01,943 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:01,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:01,943 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-21 17:27:01,944 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:01,944 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [128533330] [2020-08-21 17:27:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:01,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:02,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:02,014 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [128533330] [2020-08-21 17:27:02,014 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:02,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 17:27:02,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220422627] [2020-08-21 17:27:02,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:02,017 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:02,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:02,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:02,018 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-21 17:27:02,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:02,327 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-21 17:27:02,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:27:02,328 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 17:27:02,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:02,330 INFO L225 Difference]: With dead ends: 170 [2020-08-21 17:27:02,331 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 17:27:02,332 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 [2020-08-21 17:27:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 17:27:02,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-21 17:27:02,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 17:27:02,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-21 17:27:02,345 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-21 17:27:02,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:02,346 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-21 17:27:02,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:02,346 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-21 17:27:02,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 17:27:02,347 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:02,347 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:02,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 17:27:02,348 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:02,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:02,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-21 17:27:02,349 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:02,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528652450] [2020-08-21 17:27:02,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,425 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:02,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528652450] [2020-08-21 17:27:02,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:02,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:27:02,433 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837169121] [2020-08-21 17:27:02,433 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:27:02,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:02,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:27:02,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:27:02,434 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-21 17:27:02,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:02,731 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-21 17:27:02,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:27:02,732 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 17:27:02,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:02,735 INFO L225 Difference]: With dead ends: 203 [2020-08-21 17:27:02,735 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 17:27:02,736 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 [2020-08-21 17:27:02,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 17:27:02,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-21 17:27:02,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 17:27:02,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-21 17:27:02,749 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-21 17:27:02,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:02,750 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-21 17:27:02,750 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:27:02,750 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-21 17:27:02,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 17:27:02,751 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:02,751 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:02,751 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 17:27:02,752 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:02,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:02,752 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-21 17:27:02,752 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:02,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571796322] [2020-08-21 17:27:02,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:02,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:02,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:02,845 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:02,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571796322] [2020-08-21 17:27:02,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:02,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 17:27:02,846 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991455061] [2020-08-21 17:27:02,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:27:02,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:02,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:27:02,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:27:02,848 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-21 17:27:03,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:03,259 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-21 17:27:03,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:27:03,259 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 17:27:03,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:03,262 INFO L225 Difference]: With dead ends: 236 [2020-08-21 17:27:03,262 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 17:27:03,263 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 [2020-08-21 17:27:03,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 17:27:03,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-21 17:27:03,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 17:27:03,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-21 17:27:03,275 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-21 17:27:03,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:03,276 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-21 17:27:03,276 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:27:03,276 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-21 17:27:03,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 17:27:03,277 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:03,277 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 17:27:03,277 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 17:27:03,277 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:03,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:03,278 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-21 17:27:03,278 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:03,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1103406866] [2020-08-21 17:27:03,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:03,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:03,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,342 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-21 17:27:03,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1103406866] [2020-08-21 17:27:03,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:03,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:27:03,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918962357] [2020-08-21 17:27:03,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:03,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:03,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:03,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:03,345 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-21 17:27:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:03,460 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-21 17:27:03,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 17:27:03,461 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 17:27:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:03,462 INFO L225 Difference]: With dead ends: 116 [2020-08-21 17:27:03,462 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 17:27:03,463 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 [2020-08-21 17:27:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 17:27:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-21 17:27:03,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 17:27:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-21 17:27:03,471 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-21 17:27:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:03,472 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-21 17:27:03,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:03,472 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-21 17:27:03,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 17:27:03,473 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:03,474 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] [2020-08-21 17:27:03,474 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 17:27:03,474 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:03,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:03,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-21 17:27:03,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:03,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417148760] [2020-08-21 17:27:03,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:03,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:03,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 17:27:03,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 17:27:03,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:03,583 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:03,584 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417148760] [2020-08-21 17:27:03,584 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:03,584 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 17:27:03,585 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725208883] [2020-08-21 17:27:03,585 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 17:27:03,585 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:03,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 17:27:03,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 17:27:03,586 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-21 17:27:04,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:04,091 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-21 17:27:04,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 17:27:04,092 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 17:27:04,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:04,094 INFO L225 Difference]: With dead ends: 223 [2020-08-21 17:27:04,094 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 17:27:04,095 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 [2020-08-21 17:27:04,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 17:27:04,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-21 17:27:04,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 17:27:04,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-21 17:27:04,110 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-21 17:27:04,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:04,110 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-21 17:27:04,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 17:27:04,110 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-21 17:27:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 17:27:04,113 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:04,113 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] [2020-08-21 17:27:04,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 17:27:04,114 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:04,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:04,114 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-21 17:27:04,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:04,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283922264] [2020-08-21 17:27:04,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:04,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:04,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 17:27:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 17:27:04,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,311 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:04,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283922264] [2020-08-21 17:27:04,311 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:04,312 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 17:27:04,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153159305] [2020-08-21 17:27:04,314 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 17:27:04,314 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:04,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 17:27:04,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 17:27:04,316 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-21 17:27:04,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:04,769 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-21 17:27:04,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 17:27:04,770 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 17:27:04,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:04,772 INFO L225 Difference]: With dead ends: 246 [2020-08-21 17:27:04,772 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 17:27:04,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:27:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 17:27:04,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-21 17:27:04,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 17:27:04,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-21 17:27:04,800 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-21 17:27:04,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:04,800 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-21 17:27:04,800 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 17:27:04,800 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-21 17:27:04,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 17:27:04,802 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:04,802 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] [2020-08-21 17:27:04,802 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 17:27:04,803 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:04,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:04,804 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-21 17:27:04,804 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:04,804 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [772830350] [2020-08-21 17:27:04,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:04,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:04,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 17:27:04,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:27:04,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:04,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [772830350] [2020-08-21 17:27:04,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:04,952 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 17:27:04,952 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120826631] [2020-08-21 17:27:04,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 17:27:04,953 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:04,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 17:27:04,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 17:27:04,953 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-21 17:27:05,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:05,462 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-21 17:27:05,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 17:27:05,463 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 17:27:05,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:05,467 INFO L225 Difference]: With dead ends: 269 [2020-08-21 17:27:05,467 INFO L226 Difference]: Without dead ends: 219 [2020-08-21 17:27:05,468 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 [2020-08-21 17:27:05,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-21 17:27:05,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-21 17:27:05,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 17:27:05,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-21 17:27:05,483 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-21 17:27:05,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:05,484 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-21 17:27:05,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 17:27:05,484 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-21 17:27:05,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 17:27:05,486 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:05,486 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] [2020-08-21 17:27:05,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 17:27:05,486 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:05,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:05,487 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-21 17:27:05,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:05,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184751262] [2020-08-21 17:27:05,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:05,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:05,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:05,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:05,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 17:27:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:05,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 17:27:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:05,635 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:05,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184751262] [2020-08-21 17:27:05,636 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:05,636 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 17:27:05,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158417801] [2020-08-21 17:27:05,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 17:27:05,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:05,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 17:27:05,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 17:27:05,638 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-21 17:27:06,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:06,167 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-21 17:27:06,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 17:27:06,167 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-21 17:27:06,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:06,171 INFO L225 Difference]: With dead ends: 292 [2020-08-21 17:27:06,171 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 17:27:06,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:27:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 17:27:06,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-21 17:27:06,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 17:27:06,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-21 17:27:06,185 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-21 17:27:06,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:06,185 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-21 17:27:06,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 17:27:06,186 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-21 17:27:06,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 17:27:06,187 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:06,187 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] [2020-08-21 17:27:06,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 17:27:06,188 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:06,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:06,188 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-21 17:27:06,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:06,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721076372] [2020-08-21 17:27:06,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:06,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:06,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:06,320 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 17:27:06,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:06,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:27:06,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:06,354 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:06,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721076372] [2020-08-21 17:27:06,355 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:06,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 17:27:06,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1859784646] [2020-08-21 17:27:06,360 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 17:27:06,360 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:06,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 17:27:06,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 17:27:06,361 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-21 17:27:06,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:06,940 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-21 17:27:06,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 17:27:06,941 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-21 17:27:06,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:06,943 INFO L225 Difference]: With dead ends: 315 [2020-08-21 17:27:06,943 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 17:27:06,944 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 [2020-08-21 17:27:06,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 17:27:06,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-21 17:27:06,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 17:27:06,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-21 17:27:06,955 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-21 17:27:06,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:06,956 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-21 17:27:06,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 17:27:06,956 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-21 17:27:06,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 17:27:06,957 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:06,958 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] [2020-08-21 17:27:06,958 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 17:27:06,958 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:06,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:06,959 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-21 17:27:06,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:06,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870111188] [2020-08-21 17:27:06,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,059 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:07,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 17:27:07,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:27:07,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,079 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:07,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870111188] [2020-08-21 17:27:07,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:07,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 17:27:07,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458777315] [2020-08-21 17:27:07,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 17:27:07,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:07,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 17:27:07,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 17:27:07,082 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-21 17:27:07,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:07,631 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-21 17:27:07,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 17:27:07,632 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-21 17:27:07,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:07,635 INFO L225 Difference]: With dead ends: 338 [2020-08-21 17:27:07,636 INFO L226 Difference]: Without dead ends: 288 [2020-08-21 17:27:07,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:27:07,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-21 17:27:07,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-21 17:27:07,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 17:27:07,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-21 17:27:07,645 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-21 17:27:07,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:07,646 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-21 17:27:07,646 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 17:27:07,646 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-21 17:27:07,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 17:27:07,647 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:07,647 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] [2020-08-21 17:27:07,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 17:27:07,647 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:07,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:07,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-21 17:27:07,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:07,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218395081] [2020-08-21 17:27:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:07,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 17:27:07,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:27:07,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:07,804 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:07,804 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218395081] [2020-08-21 17:27:07,804 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:07,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 17:27:07,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834100253] [2020-08-21 17:27:07,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 17:27:07,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:07,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 17:27:07,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 17:27:07,814 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-21 17:27:08,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:08,569 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-21 17:27:08,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 17:27:08,569 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 17:27:08,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:08,572 INFO L225 Difference]: With dead ends: 361 [2020-08-21 17:27:08,572 INFO L226 Difference]: Without dead ends: 311 [2020-08-21 17:27:08,573 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 [2020-08-21 17:27:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-21 17:27:08,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-21 17:27:08,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 17:27:08,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-21 17:27:08,582 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-21 17:27:08,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:08,583 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-21 17:27:08,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 17:27:08,583 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-21 17:27:08,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 17:27:08,584 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:08,584 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] [2020-08-21 17:27:08,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 17:27:08,584 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:08,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:08,585 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-21 17:27:08,585 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:08,585 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818308952] [2020-08-21 17:27:08,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:08,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:08,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:08,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:08,809 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 17:27:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:08,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:27:08,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:08,843 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:08,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818308952] [2020-08-21 17:27:08,844 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:08,844 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 17:27:08,844 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211631446] [2020-08-21 17:27:08,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 17:27:08,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:08,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 17:27:08,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 17:27:08,846 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-21 17:27:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:09,679 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-21 17:27:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 17:27:09,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-21 17:27:09,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:09,684 INFO L225 Difference]: With dead ends: 384 [2020-08-21 17:27:09,685 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 17:27:09,687 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:27:09,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 17:27:09,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-21 17:27:09,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 17:27:09,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-21 17:27:09,704 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-21 17:27:09,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:09,704 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-21 17:27:09,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 17:27:09,704 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-21 17:27:09,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 17:27:09,709 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:09,709 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] [2020-08-21 17:27:09,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 17:27:09,710 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:09,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:09,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-21 17:27:09,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:09,719 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342857545] [2020-08-21 17:27:09,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:09,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:09,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:09,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 17:27:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:09,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 17:27:09,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:09,956 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:09,956 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342857545] [2020-08-21 17:27:09,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:09,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 17:27:09,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217229493] [2020-08-21 17:27:09,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 17:27:09,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:09,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 17:27:09,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 17:27:09,958 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-21 17:27:10,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:10,696 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-21 17:27:10,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 17:27:10,697 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-21 17:27:10,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:10,700 INFO L225 Difference]: With dead ends: 407 [2020-08-21 17:27:10,701 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 17:27:10,702 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=213, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:27:10,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 17:27:10,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-21 17:27:10,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 17:27:10,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-21 17:27:10,718 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-21 17:27:10,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:10,718 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-21 17:27:10,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 17:27:10,718 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-21 17:27:10,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 17:27:10,720 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:10,721 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] [2020-08-21 17:27:10,721 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 17:27:10,721 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:10,722 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-21 17:27:10,723 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:10,724 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [761352351] [2020-08-21 17:27:10,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:10,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:10,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:10,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 17:27:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:10,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:27:10,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:10,930 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:10,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [761352351] [2020-08-21 17:27:10,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:10,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 17:27:10,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168901512] [2020-08-21 17:27:10,931 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 17:27:10,931 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:10,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 17:27:10,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 17:27:10,932 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-21 17:27:11,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:11,756 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-21 17:27:11,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 17:27:11,756 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-21 17:27:11,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:11,759 INFO L225 Difference]: With dead ends: 430 [2020-08-21 17:27:11,759 INFO L226 Difference]: Without dead ends: 380 [2020-08-21 17:27:11,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=145, Invalid=235, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:27:11,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-21 17:27:11,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-21 17:27:11,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 17:27:11,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-21 17:27:11,773 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-21 17:27:11,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:11,773 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-21 17:27:11,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 17:27:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-21 17:27:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 17:27:11,776 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:11,777 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] [2020-08-21 17:27:11,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 17:27:11,777 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:11,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:11,777 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-21 17:27:11,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:11,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949420866] [2020-08-21 17:27:11,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:12,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:12,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:12,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 17:27:12,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:12,065 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:27:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:12,071 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:12,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949420866] [2020-08-21 17:27:12,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:12,072 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 17:27:12,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446421623] [2020-08-21 17:27:12,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 17:27:12,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:12,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 17:27:12,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 17:27:12,074 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-21 17:27:12,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:12,974 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-21 17:27:12,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 17:27:12,975 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-21 17:27:12,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:12,977 INFO L225 Difference]: With dead ends: 453 [2020-08-21 17:27:12,977 INFO L226 Difference]: Without dead ends: 403 [2020-08-21 17:27:12,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:27:12,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-21 17:27:12,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-21 17:27:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 17:27:12,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-21 17:27:12,992 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-21 17:27:12,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:12,993 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-21 17:27:12,993 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 17:27:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-21 17:27:12,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 17:27:12,994 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:12,994 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] [2020-08-21 17:27:12,994 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 17:27:12,994 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:12,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:12,995 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-21 17:27:12,995 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:12,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908596617] [2020-08-21 17:27:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:13,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:13,198 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:13,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:13,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 17:27:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:13,213 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 17:27:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:13,219 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:13,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908596617] [2020-08-21 17:27:13,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:13,220 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 17:27:13,220 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552660018] [2020-08-21 17:27:13,220 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 17:27:13,221 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:13,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 17:27:13,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 17:27:13,221 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-21 17:27:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:14,129 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-21 17:27:14,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 17:27:14,130 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-21 17:27:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:14,133 INFO L225 Difference]: With dead ends: 476 [2020-08-21 17:27:14,133 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 17:27:14,134 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 [2020-08-21 17:27:14,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 17:27:14,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-21 17:27:14,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 17:27:14,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-21 17:27:14,143 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-21 17:27:14,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:14,144 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-21 17:27:14,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 17:27:14,144 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-21 17:27:14,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 17:27:14,145 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:14,145 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] [2020-08-21 17:27:14,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 17:27:14,145 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-21 17:27:14,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:14,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607018465] [2020-08-21 17:27:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:14,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,393 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 17:27:14,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:27:14,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:14,424 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:14,424 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607018465] [2020-08-21 17:27:14,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:14,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 17:27:14,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307563893] [2020-08-21 17:27:14,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 17:27:14,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:14,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 17:27:14,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 17:27:14,427 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-21 17:27:15,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:15,622 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-21 17:27:15,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 17:27:15,623 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-21 17:27:15,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:15,626 INFO L225 Difference]: With dead ends: 499 [2020-08-21 17:27:15,626 INFO L226 Difference]: Without dead ends: 449 [2020-08-21 17:27:15,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=307, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:27:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-21 17:27:15,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-21 17:27:15,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 17:27:15,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-21 17:27:15,642 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-21 17:27:15,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:15,642 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-21 17:27:15,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 17:27:15,642 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-21 17:27:15,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 17:27:15,643 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:15,643 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] [2020-08-21 17:27:15,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 17:27:15,644 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:15,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:15,644 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-21 17:27:15,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:15,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [477262991] [2020-08-21 17:27:15,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:15,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:15,935 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:15,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:15,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 17:27:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:15,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 17:27:15,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:15,966 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:15,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [477262991] [2020-08-21 17:27:15,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:15,968 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 17:27:15,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329535183] [2020-08-21 17:27:15,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 17:27:15,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:15,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 17:27:15,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 17:27:15,970 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-21 17:27:17,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:17,134 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-21 17:27:17,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 17:27:17,135 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-21 17:27:17,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:17,138 INFO L225 Difference]: With dead ends: 522 [2020-08-21 17:27:17,138 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 17:27:17,140 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 [2020-08-21 17:27:17,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 17:27:17,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-21 17:27:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 17:27:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-21 17:27:17,150 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-21 17:27:17,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:17,151 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-21 17:27:17,151 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 17:27:17,151 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-21 17:27:17,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 17:27:17,152 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:17,152 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] [2020-08-21 17:27:17,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 17:27:17,152 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:17,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:17,153 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-21 17:27:17,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:17,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639352539] [2020-08-21 17:27:17,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:17,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:17,460 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:17,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:17,463 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 17:27:17,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:17,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 17:27:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:17,499 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:17,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639352539] [2020-08-21 17:27:17,500 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:17,500 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 17:27:17,501 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181459732] [2020-08-21 17:27:17,503 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 17:27:17,503 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:17,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 17:27:17,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 17:27:17,504 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-21 17:27:19,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:19,092 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-21 17:27:19,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 17:27:19,092 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-21 17:27:19,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:19,096 INFO L225 Difference]: With dead ends: 545 [2020-08-21 17:27:19,096 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 17:27:19,097 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-21 17:27:19,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 17:27:19,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-21 17:27:19,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 17:27:19,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-21 17:27:19,112 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-21 17:27:19,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:19,113 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-21 17:27:19,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 17:27:19,113 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-21 17:27:19,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 17:27:19,114 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:19,114 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] [2020-08-21 17:27:19,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 17:27:19,114 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:19,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-21 17:27:19,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:19,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2074118963] [2020-08-21 17:27:19,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:19,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:19,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 17:27:19,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:19,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 17:27:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:19,437 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:19,438 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2074118963] [2020-08-21 17:27:19,438 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:19,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 17:27:19,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329571340] [2020-08-21 17:27:19,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 17:27:19,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:19,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 17:27:19,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 17:27:19,440 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-21 17:27:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:20,636 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-21 17:27:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 17:27:20,637 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 17:27:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:20,641 INFO L225 Difference]: With dead ends: 568 [2020-08-21 17:27:20,641 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 17:27:20,642 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 [2020-08-21 17:27:20,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 17:27:20,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-21 17:27:20,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 17:27:20,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-21 17:27:20,658 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-21 17:27:20,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:20,658 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-21 17:27:20,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 17:27:20,659 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-21 17:27:20,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 17:27:20,660 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:20,660 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] [2020-08-21 17:27:20,661 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 17:27:20,661 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:20,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:20,661 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-21 17:27:20,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:20,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247408904] [2020-08-21 17:27:20,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:20,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:20,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:20,984 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 17:27:20,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:21,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 17:27:21,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:21,017 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247408904] [2020-08-21 17:27:21,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:21,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 17:27:21,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327059278] [2020-08-21 17:27:21,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 17:27:21,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:21,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 17:27:21,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 17:27:21,019 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-21 17:27:22,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:22,157 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-21 17:27:22,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 17:27:22,160 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 17:27:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:22,164 INFO L225 Difference]: With dead ends: 591 [2020-08-21 17:27:22,164 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 17:27:22,165 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 [2020-08-21 17:27:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 17:27:22,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-21 17:27:22,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 17:27:22,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-21 17:27:22,175 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-21 17:27:22,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:22,175 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-21 17:27:22,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 17:27:22,176 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-21 17:27:22,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 17:27:22,176 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:22,177 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] [2020-08-21 17:27:22,177 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 17:27:22,177 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:22,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:22,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-21 17:27:22,178 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:22,178 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930862063] [2020-08-21 17:27:22,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:22,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:22,506 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:22,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 17:27:22,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:22,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 17:27:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:22,536 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:22,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930862063] [2020-08-21 17:27:22,536 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:22,536 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 17:27:22,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707817395] [2020-08-21 17:27:22,537 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 17:27:22,537 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:22,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 17:27:22,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 17:27:22,538 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-21 17:27:23,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:23,800 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-21 17:27:23,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 17:27:23,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-21 17:27:23,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:23,804 INFO L225 Difference]: With dead ends: 614 [2020-08-21 17:27:23,804 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 17:27:23,805 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 [2020-08-21 17:27:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 17:27:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-21 17:27:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 17:27:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-21 17:27:23,818 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-21 17:27:23,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:23,819 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-21 17:27:23,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 17:27:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-21 17:27:23,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 17:27:23,820 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:23,821 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] [2020-08-21 17:27:23,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 17:27:23,821 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:23,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:23,821 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-21 17:27:23,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:23,822 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817000296] [2020-08-21 17:27:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:23,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:24,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:24,171 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 17:27:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:24,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 17:27:24,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:24,201 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:24,201 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817000296] [2020-08-21 17:27:24,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:24,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 17:27:24,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274261273] [2020-08-21 17:27:24,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 17:27:24,203 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:24,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 17:27:24,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 17:27:24,204 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-21 17:27:25,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:25,783 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-21 17:27:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 17:27:25,783 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-21 17:27:25,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:25,786 INFO L225 Difference]: With dead ends: 637 [2020-08-21 17:27:25,786 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 17:27:25,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-21 17:27:25,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 17:27:25,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-21 17:27:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 17:27:25,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-21 17:27:25,797 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-21 17:27:25,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:25,797 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-21 17:27:25,797 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 17:27:25,797 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-21 17:27:25,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 17:27:25,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:25,798 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] [2020-08-21 17:27:25,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 17:27:25,799 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:25,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-21 17:27:25,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:25,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1607487912] [2020-08-21 17:27:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:25,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:26,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:26,164 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 17:27:26,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:26,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 17:27:26,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:26,191 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:26,191 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1607487912] [2020-08-21 17:27:26,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:26,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 17:27:26,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790935501] [2020-08-21 17:27:26,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 17:27:26,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:26,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 17:27:26,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 17:27:26,193 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-21 17:27:27,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:27,949 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-21 17:27:27,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 17:27:27,949 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 17:27:27,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:27,952 INFO L225 Difference]: With dead ends: 660 [2020-08-21 17:27:27,952 INFO L226 Difference]: Without dead ends: 610 [2020-08-21 17:27:27,954 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 [2020-08-21 17:27:27,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-21 17:27:27,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-21 17:27:27,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 17:27:27,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-21 17:27:27,963 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-21 17:27:27,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:27,964 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-21 17:27:27,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 17:27:27,964 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-21 17:27:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 17:27:27,965 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:27,965 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] [2020-08-21 17:27:27,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 17:27:27,965 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:27,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:27,966 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-21 17:27:27,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:27,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798945666] [2020-08-21 17:27:27,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:27,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:28,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:28,358 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 17:27:28,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:28,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:27:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:28,399 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:28,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798945666] [2020-08-21 17:27:28,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:28,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 17:27:28,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368374411] [2020-08-21 17:27:28,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 17:27:28,401 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:28,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 17:27:28,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 17:27:28,401 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-21 17:27:29,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:29,981 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-21 17:27:29,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 17:27:29,987 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-21 17:27:29,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:29,990 INFO L225 Difference]: With dead ends: 683 [2020-08-21 17:27:29,991 INFO L226 Difference]: Without dead ends: 633 [2020-08-21 17:27:29,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-21 17:27:29,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-21 17:27:30,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-21 17:27:30,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 17:27:30,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-21 17:27:30,002 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-21 17:27:30,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:30,002 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-21 17:27:30,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 17:27:30,002 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-21 17:27:30,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 17:27:30,003 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:30,003 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] [2020-08-21 17:27:30,004 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 17:27:30,004 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:30,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:30,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-21 17:27:30,004 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:30,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36665758] [2020-08-21 17:27:30,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:30,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:30,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:30,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 17:27:30,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:30,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 17:27:30,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:30,505 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:30,506 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36665758] [2020-08-21 17:27:30,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:30,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 17:27:30,507 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670575245] [2020-08-21 17:27:30,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 17:27:30,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:30,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 17:27:30,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 17:27:30,508 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-21 17:27:32,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:32,406 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-21 17:27:32,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 17:27:32,407 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-21 17:27:32,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:32,410 INFO L225 Difference]: With dead ends: 706 [2020-08-21 17:27:32,410 INFO L226 Difference]: Without dead ends: 656 [2020-08-21 17:27:32,410 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=415, Invalid=577, Unknown=0, NotChecked=0, Total=992 [2020-08-21 17:27:32,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-21 17:27:32,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-21 17:27:32,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 17:27:32,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-21 17:27:32,421 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-21 17:27:32,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:32,421 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-21 17:27:32,421 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 17:27:32,421 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-21 17:27:32,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 17:27:32,422 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:32,422 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] [2020-08-21 17:27:32,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 17:27:32,423 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:32,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:32,423 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-21 17:27:32,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:32,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076960394] [2020-08-21 17:27:32,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:32,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:32,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:32,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:32,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 17:27:32,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:32,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 17:27:32,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:32,893 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:32,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076960394] [2020-08-21 17:27:32,894 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:32,894 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 17:27:32,894 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499789921] [2020-08-21 17:27:32,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 17:27:32,895 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:32,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 17:27:32,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 17:27:32,896 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-21 17:27:35,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:35,298 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-21 17:27:35,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 17:27:35,299 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-21 17:27:35,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:35,305 INFO L225 Difference]: With dead ends: 729 [2020-08-21 17:27:35,305 INFO L226 Difference]: Without dead ends: 679 [2020-08-21 17:27:35,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-21 17:27:35,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-21 17:27:35,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-21 17:27:35,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 17:27:35,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-21 17:27:35,325 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-21 17:27:35,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:35,326 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-21 17:27:35,326 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 17:27:35,326 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-21 17:27:35,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 17:27:35,328 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:35,328 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] [2020-08-21 17:27:35,328 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 17:27:35,328 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:35,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:35,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-21 17:27:35,329 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:35,330 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133470878] [2020-08-21 17:27:35,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:36,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:36,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 17:27:36,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 17:27:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:36,058 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-21 17:27:36,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133470878] [2020-08-21 17:27:36,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:36,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 17:27:36,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806116365] [2020-08-21 17:27:36,060 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 17:27:36,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:36,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 17:27:36,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 17:27:36,062 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-21 17:27:38,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:38,469 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-21 17:27:38,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 17:27:38,470 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-21 17:27:38,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:38,473 INFO L225 Difference]: With dead ends: 752 [2020-08-21 17:27:38,474 INFO L226 Difference]: Without dead ends: 702 [2020-08-21 17:27:38,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 17:27:38,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-21 17:27:38,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-21 17:27:38,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 17:27:38,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-21 17:27:38,487 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-21 17:27:38,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:38,487 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-21 17:27:38,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 17:27:38,487 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-21 17:27:38,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 17:27:38,488 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:38,488 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] [2020-08-21 17:27:38,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 17:27:38,489 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:38,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:38,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-21 17:27:38,493 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:38,493 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680999194] [2020-08-21 17:27:38,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,552 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:38,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 17:27:38,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 17:27:38,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,568 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 17:27:38,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680999194] [2020-08-21 17:27:38,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:38,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 17:27:38,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567552728] [2020-08-21 17:27:38,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 17:27:38,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:38,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 17:27:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 17:27:38,574 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-21 17:27:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:38,708 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-21 17:27:38,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 17:27:38,708 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-21 17:27:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:38,709 INFO L225 Difference]: With dead ends: 177 [2020-08-21 17:27:38,709 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 17:27:38,710 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 [2020-08-21 17:27:38,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 17:27:38,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-21 17:27:38,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 17:27:38,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-21 17:27:38,715 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-21 17:27:38,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:38,715 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-21 17:27:38,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 17:27:38,715 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-21 17:27:38,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 17:27:38,716 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:38,717 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] [2020-08-21 17:27:38,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 17:27:38,717 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:38,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-21 17:27:38,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:38,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184258066] [2020-08-21 17:27:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:38,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:38,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,795 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 17:27:38,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 17:27:38,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-21 17:27:38,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184258066] [2020-08-21 17:27:38,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 17:27:38,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 17:27:38,816 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358682020] [2020-08-21 17:27:38,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:27:38,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:38,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:27:38,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:27:38,817 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-21 17:27:39,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:39,033 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-21 17:27:39,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:27:39,034 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-21 17:27:39,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:39,035 INFO L225 Difference]: With dead ends: 200 [2020-08-21 17:27:39,035 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 17:27:39,036 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 [2020-08-21 17:27:39,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 17:27:39,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-21 17:27:39,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 17:27:39,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-21 17:27:39,041 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-21 17:27:39,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:39,042 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-21 17:27:39,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:27:39,042 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-21 17:27:39,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 17:27:39,043 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:39,043 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] [2020-08-21 17:27:39,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 17:27:39,044 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:39,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:39,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-21 17:27:39,044 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:39,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218290127] [2020-08-21 17:27:39,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:39,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,113 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 17:27:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:27:39,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,151 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 17:27:39,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218290127] [2020-08-21 17:27:39,152 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:39,152 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 17:27:39,152 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472880349] [2020-08-21 17:27:39,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 17:27:39,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 17:27:39,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 17:27:39,154 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-21 17:27:39,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:39,295 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-21 17:27:39,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 17:27:39,295 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-21 17:27:39,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:39,297 INFO L225 Difference]: With dead ends: 187 [2020-08-21 17:27:39,297 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 17:27:39,298 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 [2020-08-21 17:27:39,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 17:27:39,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-21 17:27:39,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 17:27:39,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-21 17:27:39,306 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-21 17:27:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-21 17:27:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 17:27:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-21 17:27:39,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 17:27:39,307 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 17:27:39,307 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] [2020-08-21 17:27:39,307 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 17:27:39,307 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 17:27:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 17:27:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-21 17:27:39,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 17:27:39,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087517754] [2020-08-21 17:27:39,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 17:27:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 17:27:39,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,390 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 17:27:39,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 17:27:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 17:27:39,424 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-21 17:27:39,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087517754] [2020-08-21 17:27:39,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 17:27:39,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 17:27:39,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354961706] [2020-08-21 17:27:39,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 17:27:39,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 17:27:39,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 17:27:39,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 17:27:39,426 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-21 17:27:39,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 17:27:39,574 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-21 17:27:39,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 17:27:39,580 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 17:27:39,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 17:27:39,581 INFO L225 Difference]: With dead ends: 157 [2020-08-21 17:27:39,581 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 17:27:39,582 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 [2020-08-21 17:27:39,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 17:27:39,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 17:27:39,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 17:27:39,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 17:27:39,583 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-21 17:27:39,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 17:27:39,585 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 17:27:39,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 17:27:39,585 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 17:27:39,585 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 17:27:39,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 17:27:39,588 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 17:27:39,827 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 17:27:39,827 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 17:27:39,828 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-21 17:27:39,828 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-21 17:27:39,828 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-21 17:27:39,828 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|)) [2020-08-21 17:27:39,828 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-21 17:27:39,828 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:27:39,828 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|)) [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:27:39,829 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 17:27:39,829 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 17:27:39,829 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 17:27:39,829 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-21 17:27:39,830 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-21 17:27:39,830 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-21 17:27:39,830 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-21 17:27:39,830 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,830 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-21 17:27:39,832 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,832 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-21 17:27:39,832 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-21 17:27:39,832 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,833 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-21 17:27:39,833 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-21 17:27:39,833 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-21 17:27:39,834 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-21 17:27:39,834 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-21 17:27:39,834 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-21 17:27:39,834 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-21 17:27:39,834 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-21 17:27:39,834 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-21 17:27:39,834 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-21 17:27:39,834 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-21 17:27:39,834 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-21 17:27:39,835 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-21 17:27:39,835 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-21 17:27:39,835 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,836 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,836 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-21 17:27:39,836 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-21 17:27:39,837 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-21 17:27:39,837 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-21 17:27:39,837 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 17:27:39,837 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-21 17:27:39,837 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-21 17:27:39,838 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-21 17:27:39,838 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-21 17:27:39,838 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-21 17:27:39,838 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-21 17:27:39,838 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-21 17:27:39,839 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-21 17:27:39,864 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:27:39 BoogieIcfgContainer [2020-08-21 17:27:39,864 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 17:27:39,866 INFO L168 Benchmark]: Toolchain (without parser) took 39470.70 ms. Allocated memory was 140.5 MB in the beginning and 459.8 MB in the end (delta: 319.3 MB). Free memory was 103.3 MB in the beginning and 346.5 MB in the end (delta: -243.2 MB). Peak memory consumption was 76.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:39,867 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-08-21 17:27:39,867 INFO L168 Benchmark]: CACSL2BoogieTranslator took 268.44 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 91.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:39,868 INFO L168 Benchmark]: Boogie Preprocessor took 122.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:39,869 INFO L168 Benchmark]: RCFGBuilder took 463.82 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 156.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:39,869 INFO L168 Benchmark]: TraceAbstraction took 38611.30 ms. Allocated memory was 203.4 MB in the beginning and 459.8 MB in the end (delta: 256.4 MB). Free memory was 156.3 MB in the beginning and 346.5 MB in the end (delta: -190.1 MB). Peak memory consumption was 66.3 MB. Max. memory is 7.1 GB. [2020-08-21 17:27:39,872 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.5 MB. Free memory was 122.1 MB in the beginning and 121.8 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 268.44 ms. Allocated memory is still 140.5 MB. Free memory was 103.1 MB in the beginning and 91.9 MB in the end (delta: 11.1 MB). Peak memory consumption was 11.1 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 122.29 ms. Allocated memory was 140.5 MB in the beginning and 203.4 MB in the end (delta: 62.9 MB). Free memory was 91.9 MB in the beginning and 180.7 MB in the end (delta: -88.8 MB). Peak memory consumption was 12.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 463.82 ms. Allocated memory is still 203.4 MB. Free memory was 180.1 MB in the beginning and 156.3 MB in the end (delta: 23.8 MB). Peak memory consumption was 23.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 38611.30 ms. Allocated memory was 203.4 MB in the beginning and 459.8 MB in the end (delta: 256.4 MB). Free memory was 156.3 MB in the beginning and 346.5 MB in the end (delta: -190.1 MB). Peak memory consumption was 66.3 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: 38.2s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 29.5s, 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, 20.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.5s 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, 7.0s 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...