/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=SHALLOWEST --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 19:51:57,799 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-21 19:51:57,802 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-21 19:51:57,844 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-21 19:51:57,844 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-21 19:51:57,857 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-21 19:51:57,858 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-21 19:51:57,862 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-21 19:51:57,865 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-21 19:51:57,867 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-21 19:51:57,871 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-21 19:51:57,872 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-21 19:51:57,872 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-21 19:51:57,876 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-21 19:51:57,877 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-21 19:51:57,878 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-21 19:51:57,878 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-21 19:51:57,879 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-21 19:51:57,881 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-21 19:51:57,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-21 19:51:57,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-21 19:51:57,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-21 19:51:57,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-21 19:51:57,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-21 19:51:57,889 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-21 19:51:57,889 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-21 19:51:57,890 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-21 19:51:57,891 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-21 19:51:57,891 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-21 19:51:57,892 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-08-21 19:51:57,897 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-21 19:51:57,898 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-21 19:51:57,899 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-21 19:51:57,899 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 19:51:57,922 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-21 19:51:57,922 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-21 19:51:57,924 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-21 19:51:57,924 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-21 19:51:57,924 INFO L138 SettingsManager]: * Use SBE=true [2020-08-21 19:51:57,925 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-21 19:51:57,925 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-21 19:51:57,925 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-21 19:51:57,925 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-21 19:51:57,925 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-21 19:51:57,926 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-21 19:51:57,926 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-21 19:51:57,926 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-21 19:51:57,926 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-21 19:51:57,927 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-21 19:51:57,927 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-21 19:51:57,927 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-21 19:51:57,927 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-21 19:51:57,927 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-21 19:51:57,928 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-21 19:51:57,928 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-21 19:51:57,928 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-21 19:51:57,928 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-21 19:51:57,928 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-21 19:51:57,929 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-21 19:51:57,929 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-21 19:51:57,929 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-21 19:51:57,929 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-21 19:51:57,929 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-21 19:51:57,930 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=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true; [2020-08-21 19:51:58,218 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-21 19:51:58,231 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-21 19:51:58,235 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-21 19:51:58,236 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-21 19:51:58,237 INFO L275 PluginConnector]: CDTParser initialized [2020-08-21 19:51:58,237 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 19:51:58,303 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cb165b73/1c9431474ee3418fbe525d748907ff8b/FLAG9ea356416 [2020-08-21 19:51:58,825 INFO L306 CDTParser]: Found 1 translation units. [2020-08-21 19:51:58,826 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-21 19:51:58,834 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cb165b73/1c9431474ee3418fbe525d748907ff8b/FLAG9ea356416 [2020-08-21 19:51:59,141 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6cb165b73/1c9431474ee3418fbe525d748907ff8b [2020-08-21 19:51:59,149 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-21 19:51:59,150 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-21 19:51:59,152 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-21 19:51:59,152 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-21 19:51:59,156 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-21 19:51:59,157 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,160 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@12391971 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59, skipping insertion in model container [2020-08-21 19:51:59,160 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,169 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-21 19:51:59,189 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-21 19:51:59,391 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:51:59,400 INFO L203 MainTranslator]: Completed pre-run [2020-08-21 19:51:59,426 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-21 19:51:59,443 INFO L208 MainTranslator]: Completed translation [2020-08-21 19:51:59,443 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59 WrapperNode [2020-08-21 19:51:59,444 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-21 19:51:59,444 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-21 19:51:59,444 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-21 19:51:59,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-21 19:51:59,544 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,544 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,553 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,554 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,573 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,584 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,586 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (1/1) ... [2020-08-21 19:51:59,590 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-21 19:51:59,590 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-21 19:51:59,590 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-21 19:51:59,590 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-21 19:51:59,591 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (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 19:51:59,659 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-21 19:51:59,660 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-21 19:51:59,660 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-21 19:51:59,661 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-21 19:51:59,661 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-21 19:51:59,661 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-21 19:51:59,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-21 19:51:59,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-21 19:51:59,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-21 19:51:59,661 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-21 19:51:59,662 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-21 19:51:59,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-21 19:51:59,663 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-21 19:52:00,080 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-21 19:52:00,080 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-21 19:52:00,085 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:00 BoogieIcfgContainer [2020-08-21 19:52:00,085 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-21 19:52:00,086 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-21 19:52:00,086 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-21 19:52:00,089 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-21 19:52:00,090 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.08 07:51:59" (1/3) ... [2020-08-21 19:52:00,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ab5e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:00, skipping insertion in model container [2020-08-21 19:52:00,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.08 07:51:59" (2/3) ... [2020-08-21 19:52:00,091 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@66ab5e99 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 07:52:00, skipping insertion in model container [2020-08-21 19:52:00,091 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 07:52:00" (3/3) ... [2020-08-21 19:52:00,093 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-21 19:52:00,104 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-21 19:52:00,112 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-21 19:52:00,126 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-21 19:52:00,151 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-21 19:52:00,152 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-21 19:52:00,152 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-21 19:52:00,152 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-21 19:52:00,152 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-21 19:52:00,152 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-21 19:52:00,153 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-21 19:52:00,153 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-21 19:52:00,172 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-21 19:52:00,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-21 19:52:00,179 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:00,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:00,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:00,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:00,185 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-21 19:52:00,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:00,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193523152] [2020-08-21 19:52:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:00,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:00,389 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:00,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:00,400 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 19:52:00,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193523152] [2020-08-21 19:52:00,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:00,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-21 19:52:00,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817389562] [2020-08-21 19:52:00,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-21 19:52:00,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:00,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-21 19:52:00,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-21 19:52:00,430 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-21 19:52:00,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:00,733 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-21 19:52:00,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-21 19:52:00,735 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-21 19:52:00,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:00,746 INFO L225 Difference]: With dead ends: 150 [2020-08-21 19:52:00,747 INFO L226 Difference]: Without dead ends: 89 [2020-08-21 19:52:00,752 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 19:52:00,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-21 19:52:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-21 19:52:00,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-21 19:52:00,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-21 19:52:00,812 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-21 19:52:00,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:00,813 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-21 19:52:00,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-21 19:52:00,813 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-21 19:52:00,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-21 19:52:00,814 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:00,815 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:00,815 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-21 19:52:00,815 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:00,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:00,817 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-21 19:52:00,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:00,818 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756177204] [2020-08-21 19:52:00,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:00,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:00,930 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:00,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:00,942 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 19:52:00,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756177204] [2020-08-21 19:52:00,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:00,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-21 19:52:00,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839525602] [2020-08-21 19:52:00,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:52:00,948 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:00,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:52:00,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:52:00,950 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-21 19:52:01,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:01,309 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-21 19:52:01,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:52:01,310 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-21 19:52:01,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:01,312 INFO L225 Difference]: With dead ends: 170 [2020-08-21 19:52:01,312 INFO L226 Difference]: Without dead ends: 122 [2020-08-21 19:52:01,314 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 19:52:01,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-21 19:52:01,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-21 19:52:01,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-21 19:52:01,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-21 19:52:01,328 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-21 19:52:01,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:01,329 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-21 19:52:01,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:52:01,329 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-21 19:52:01,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-21 19:52:01,330 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:01,330 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:01,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-21 19:52:01,331 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:01,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:01,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-21 19:52:01,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:01,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504313420] [2020-08-21 19:52:01,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:01,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:01,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:01,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:01,400 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 19:52:01,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504313420] [2020-08-21 19:52:01,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:01,401 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 19:52:01,401 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010021272] [2020-08-21 19:52:01,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:52:01,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:01,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:52:01,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:52:01,403 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-21 19:52:01,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:01,710 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-21 19:52:01,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:52:01,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-21 19:52:01,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:01,714 INFO L225 Difference]: With dead ends: 203 [2020-08-21 19:52:01,715 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 19:52:01,716 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 19:52:01,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 19:52:01,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-21 19:52:01,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-21 19:52:01,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-21 19:52:01,730 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-21 19:52:01,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:01,731 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-21 19:52:01,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:52:01,731 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-21 19:52:01,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-21 19:52:01,732 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:01,732 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:01,733 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-21 19:52:01,733 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:01,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:01,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-21 19:52:01,734 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:01,734 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663150232] [2020-08-21 19:52:01,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:01,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:01,808 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:01,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:01,813 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 19:52:01,814 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663150232] [2020-08-21 19:52:01,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:01,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-21 19:52:01,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592603193] [2020-08-21 19:52:01,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:52:01,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:01,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:52:01,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:52:01,816 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-21 19:52:02,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:02,227 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-21 19:52:02,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:52:02,228 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-21 19:52:02,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:02,230 INFO L225 Difference]: With dead ends: 236 [2020-08-21 19:52:02,231 INFO L226 Difference]: Without dead ends: 188 [2020-08-21 19:52:02,232 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 19:52:02,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-21 19:52:02,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-21 19:52:02,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-21 19:52:02,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-21 19:52:02,245 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-21 19:52:02,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:02,245 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-21 19:52:02,245 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:52:02,245 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-21 19:52:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-21 19:52:02,246 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:02,246 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-21 19:52:02,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-21 19:52:02,247 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:02,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:02,247 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-21 19:52:02,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:02,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298985859] [2020-08-21 19:52:02,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:02,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,315 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 19:52:02,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298985859] [2020-08-21 19:52:02,316 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:02,316 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:52:02,316 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763781769] [2020-08-21 19:52:02,317 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:52:02,317 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:02,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:52:02,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:52:02,318 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-21 19:52:02,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:02,446 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-21 19:52:02,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-21 19:52:02,447 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-21 19:52:02,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:02,448 INFO L225 Difference]: With dead ends: 116 [2020-08-21 19:52:02,448 INFO L226 Difference]: Without dead ends: 67 [2020-08-21 19:52:02,449 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 19:52:02,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-21 19:52:02,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-21 19:52:02,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-21 19:52:02,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-21 19:52:02,458 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-21 19:52:02,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:02,458 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-21 19:52:02,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:52:02,458 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-21 19:52:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-21 19:52:02,460 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:02,460 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 19:52:02,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-21 19:52:02,461 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:02,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:02,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-21 19:52:02,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:02,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616335609] [2020-08-21 19:52:02,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,566 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-21 19:52:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,578 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:52:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:02,585 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 19:52:02,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616335609] [2020-08-21 19:52:02,586 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:02,586 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-21 19:52:02,586 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831147243] [2020-08-21 19:52:02,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-21 19:52:02,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:02,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-21 19:52:02,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-21 19:52:02,588 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-21 19:52:02,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:02,953 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-21 19:52:02,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-21 19:52:02,953 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-21 19:52:02,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:02,955 INFO L225 Difference]: With dead ends: 223 [2020-08-21 19:52:02,956 INFO L226 Difference]: Without dead ends: 173 [2020-08-21 19:52:02,956 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 19:52:02,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-21 19:52:02,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-21 19:52:02,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-21 19:52:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-21 19:52:02,968 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-21 19:52:02,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:02,969 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-21 19:52:02,969 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-21 19:52:02,969 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-21 19:52:02,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-21 19:52:02,970 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:02,971 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 19:52:02,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-21 19:52:02,971 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:02,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:02,972 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-21 19:52:02,972 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:02,972 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896596152] [2020-08-21 19:52:02,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:02,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:03,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-21 19:52:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 19:52:03,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,094 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 19:52:03,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896596152] [2020-08-21 19:52:03,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:03,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-21 19:52:03,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713648627] [2020-08-21 19:52:03,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-21 19:52:03,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:03,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-21 19:52:03,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-21 19:52:03,112 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-21 19:52:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:03,565 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-21 19:52:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-21 19:52:03,566 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-21 19:52:03,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:03,569 INFO L225 Difference]: With dead ends: 246 [2020-08-21 19:52:03,569 INFO L226 Difference]: Without dead ends: 196 [2020-08-21 19:52:03,570 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:52:03,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-21 19:52:03,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-21 19:52:03,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-21 19:52:03,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-21 19:52:03,584 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-21 19:52:03,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:03,584 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-21 19:52:03,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-21 19:52:03,585 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-21 19:52:03,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-21 19:52:03,586 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:03,586 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 19:52:03,587 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-21 19:52:03,587 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:03,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:03,587 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-21 19:52:03,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:03,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972979102] [2020-08-21 19:52:03,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-21 19:52:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,744 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:52:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:03,752 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 19:52:03,753 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972979102] [2020-08-21 19:52:03,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:03,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-21 19:52:03,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406347171] [2020-08-21 19:52:03,754 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-21 19:52:03,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:03,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-21 19:52:03,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-21 19:52:03,755 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-21 19:52:04,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:04,279 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-21 19:52:04,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-21 19:52:04,280 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-21 19:52:04,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:04,283 INFO L225 Difference]: With dead ends: 269 [2020-08-21 19:52:04,283 INFO L226 Difference]: Without dead ends: 219 [2020-08-21 19:52:04,284 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:52:04,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-21 19:52:04,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-21 19:52:04,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-21 19:52:04,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-21 19:52:04,296 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-21 19:52:04,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:04,296 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-21 19:52:04,296 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-21 19:52:04,296 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-21 19:52:04,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-21 19:52:04,298 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:04,298 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 19:52:04,298 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-21 19:52:04,299 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:04,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:04,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-21 19:52:04,299 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:04,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [177175727] [2020-08-21 19:52:04,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:04,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:04,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:04,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-21 19:52:04,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:04,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:52:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:04,443 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 19:52:04,444 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [177175727] [2020-08-21 19:52:04,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:04,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-21 19:52:04,449 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012292550] [2020-08-21 19:52:04,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-21 19:52:04,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-21 19:52:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-21 19:52:04,454 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-21 19:52:04,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:04,986 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-21 19:52:04,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-21 19:52:04,987 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-21 19:52:04,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:04,990 INFO L225 Difference]: With dead ends: 292 [2020-08-21 19:52:04,990 INFO L226 Difference]: Without dead ends: 242 [2020-08-21 19:52:04,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:52:04,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-21 19:52:05,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-21 19:52:05,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-21 19:52:05,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-21 19:52:05,004 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-21 19:52:05,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:05,005 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-21 19:52:05,005 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-21 19:52:05,005 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-21 19:52:05,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-21 19:52:05,007 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:05,007 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 19:52:05,007 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-21 19:52:05,007 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:05,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:05,008 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-21 19:52:05,008 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:05,008 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [770336685] [2020-08-21 19:52:05,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:05,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,143 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-21 19:52:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,163 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:52:05,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,175 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 19:52:05,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [770336685] [2020-08-21 19:52:05,176 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:05,176 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-21 19:52:05,176 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715897276] [2020-08-21 19:52:05,180 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-21 19:52:05,180 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:05,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-21 19:52:05,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-21 19:52:05,181 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-21 19:52:05,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:05,770 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-21 19:52:05,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-21 19:52:05,771 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-21 19:52:05,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:05,773 INFO L225 Difference]: With dead ends: 315 [2020-08-21 19:52:05,773 INFO L226 Difference]: Without dead ends: 265 [2020-08-21 19:52:05,774 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 19:52:05,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-21 19:52:05,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-21 19:52:05,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-21 19:52:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-21 19:52:05,785 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-21 19:52:05,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:05,785 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-21 19:52:05,786 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-21 19:52:05,786 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-21 19:52:05,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-21 19:52:05,787 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:05,787 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 19:52:05,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-21 19:52:05,787 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:05,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:05,788 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-21 19:52:05,788 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:05,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [154679518] [2020-08-21 19:52:05,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:05,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:05,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-21 19:52:05,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 19:52:05,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:05,917 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 19:52:05,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [154679518] [2020-08-21 19:52:05,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:05,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-21 19:52:05,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162790001] [2020-08-21 19:52:05,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-21 19:52:05,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:05,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-21 19:52:05,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-21 19:52:05,920 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-21 19:52:06,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:06,525 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-21 19:52:06,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-21 19:52:06,526 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-21 19:52:06,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:06,529 INFO L225 Difference]: With dead ends: 338 [2020-08-21 19:52:06,529 INFO L226 Difference]: Without dead ends: 288 [2020-08-21 19:52:06,530 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 19:52:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-21 19:52:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-21 19:52:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-21 19:52:06,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-21 19:52:06,541 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-21 19:52:06,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:06,542 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-21 19:52:06,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-21 19:52:06,542 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-21 19:52:06,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-21 19:52:06,543 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:06,543 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 19:52:06,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-21 19:52:06,544 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:06,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:06,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-21 19:52:06,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:06,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751607650] [2020-08-21 19:52:06,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:06,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:06,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:06,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-21 19:52:06,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:06,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 19:52:06,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:06,749 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 19:52:06,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751607650] [2020-08-21 19:52:06,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:06,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-21 19:52:06,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795915671] [2020-08-21 19:52:06,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-21 19:52:06,751 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:06,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-21 19:52:06,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-21 19:52:06,751 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-21 19:52:07,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:07,544 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-21 19:52:07,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-21 19:52:07,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-21 19:52:07,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:07,547 INFO L225 Difference]: With dead ends: 361 [2020-08-21 19:52:07,547 INFO L226 Difference]: Without dead ends: 311 [2020-08-21 19:52:07,548 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 19:52:07,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-21 19:52:07,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-21 19:52:07,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-21 19:52:07,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-21 19:52:07,558 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-21 19:52:07,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:07,558 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-21 19:52:07,558 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-21 19:52:07,558 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-21 19:52:07,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-21 19:52:07,560 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:07,560 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 19:52:07,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-21 19:52:07,560 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:07,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:07,561 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-21 19:52:07,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:07,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1846768335] [2020-08-21 19:52:07,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:07,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:07,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:07,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:07,747 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-21 19:52:07,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:07,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 19:52:07,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:07,785 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 19:52:07,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1846768335] [2020-08-21 19:52:07,786 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:07,786 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-21 19:52:07,786 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [431109195] [2020-08-21 19:52:07,787 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-21 19:52:07,787 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:07,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-21 19:52:07,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-21 19:52:07,789 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-21 19:52:08,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:08,521 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-21 19:52:08,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-21 19:52:08,522 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-21 19:52:08,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:08,525 INFO L225 Difference]: With dead ends: 384 [2020-08-21 19:52:08,525 INFO L226 Difference]: Without dead ends: 334 [2020-08-21 19:52:08,526 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 19:52:08,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-21 19:52:08,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-21 19:52:08,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-21 19:52:08,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-21 19:52:08,536 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-21 19:52:08,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:08,536 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-21 19:52:08,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-21 19:52:08,536 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-21 19:52:08,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-21 19:52:08,538 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:08,538 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 19:52:08,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-21 19:52:08,539 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:08,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:08,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-21 19:52:08,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:08,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643089339] [2020-08-21 19:52:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:08,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:08,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:08,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:08,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-21 19:52:08,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:08,757 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 19:52:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:08,763 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 19:52:08,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643089339] [2020-08-21 19:52:08,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:08,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-21 19:52:08,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613682852] [2020-08-21 19:52:08,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-21 19:52:08,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:08,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-21 19:52:08,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-21 19:52:08,765 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-21 19:52:09,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:09,548 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-21 19:52:09,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-21 19:52:09,549 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-21 19:52:09,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:09,554 INFO L225 Difference]: With dead ends: 407 [2020-08-21 19:52:09,554 INFO L226 Difference]: Without dead ends: 357 [2020-08-21 19:52:09,555 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 19:52:09,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-21 19:52:09,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-21 19:52:09,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-21 19:52:09,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-21 19:52:09,569 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-21 19:52:09,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:09,570 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-21 19:52:09,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-21 19:52:09,570 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-21 19:52:09,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-21 19:52:09,571 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:09,571 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 19:52:09,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-21 19:52:09,571 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:09,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:09,572 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-21 19:52:09,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:09,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816479902] [2020-08-21 19:52:09,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:09,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:09,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:09,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:09,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-21 19:52:09,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:09,788 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:52:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:09,796 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 19:52:09,797 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816479902] [2020-08-21 19:52:09,797 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:09,797 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-21 19:52:09,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878491674] [2020-08-21 19:52:09,798 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-21 19:52:09,798 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:09,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-21 19:52:09,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-21 19:52:09,799 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-21 19:52:10,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:10,664 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-21 19:52:10,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-21 19:52:10,665 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-21 19:52:10,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:10,667 INFO L225 Difference]: With dead ends: 430 [2020-08-21 19:52:10,667 INFO L226 Difference]: Without dead ends: 380 [2020-08-21 19:52:10,668 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 19:52:10,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-21 19:52:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-21 19:52:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-21 19:52:10,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-21 19:52:10,677 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-21 19:52:10,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:10,678 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-21 19:52:10,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-21 19:52:10,678 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-21 19:52:10,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-21 19:52:10,678 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:10,679 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 19:52:10,679 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-21 19:52:10,679 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:10,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:10,679 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-21 19:52:10,680 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:10,680 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260483911] [2020-08-21 19:52:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:10,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:10,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:10,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:10,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-21 19:52:10,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:10,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:52:10,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:10,914 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 19:52:10,914 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260483911] [2020-08-21 19:52:10,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:10,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-21 19:52:10,915 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252728419] [2020-08-21 19:52:10,915 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-21 19:52:10,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:10,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-21 19:52:10,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-21 19:52:10,916 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-21 19:52:11,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:11,782 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-21 19:52:11,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-21 19:52:11,783 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-21 19:52:11,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:11,786 INFO L225 Difference]: With dead ends: 453 [2020-08-21 19:52:11,786 INFO L226 Difference]: Without dead ends: 403 [2020-08-21 19:52:11,787 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 19:52:11,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-21 19:52:11,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-21 19:52:11,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-21 19:52:11,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-21 19:52:11,797 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-21 19:52:11,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:11,797 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-21 19:52:11,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-21 19:52:11,798 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-21 19:52:11,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-21 19:52:11,798 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:11,799 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 19:52:11,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-21 19:52:11,799 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:11,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:11,800 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-21 19:52:11,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:11,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1570967484] [2020-08-21 19:52:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:11,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:12,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:12,035 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-21 19:52:12,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:12,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 19:52:12,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:12,060 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 19:52:12,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1570967484] [2020-08-21 19:52:12,061 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:12,061 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-21 19:52:12,061 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67039127] [2020-08-21 19:52:12,062 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-21 19:52:12,062 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:12,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-21 19:52:12,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-21 19:52:12,063 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-21 19:52:12,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:12,964 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-21 19:52:12,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-21 19:52:12,965 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-21 19:52:12,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:12,968 INFO L225 Difference]: With dead ends: 476 [2020-08-21 19:52:12,968 INFO L226 Difference]: Without dead ends: 426 [2020-08-21 19:52:12,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=180, Invalid=282, Unknown=0, NotChecked=0, Total=462 [2020-08-21 19:52:12,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-21 19:52:12,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-21 19:52:12,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-21 19:52:12,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-21 19:52:12,987 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-21 19:52:12,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:12,987 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-21 19:52:12,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-21 19:52:12,987 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-21 19:52:12,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-21 19:52:12,988 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:12,988 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 19:52:12,988 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-21 19:52:12,989 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:12,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:12,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-21 19:52:12,989 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:12,989 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612278497] [2020-08-21 19:52:12,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:13,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:13,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:13,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-21 19:52:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:13,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 19:52:13,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:13,254 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 19:52:13,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612278497] [2020-08-21 19:52:13,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:13,255 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-21 19:52:13,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825454769] [2020-08-21 19:52:13,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-21 19:52:13,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:13,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-21 19:52:13,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-21 19:52:13,258 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-21 19:52:14,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:14,542 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-21 19:52:14,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-21 19:52:14,543 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-21 19:52:14,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:14,546 INFO L225 Difference]: With dead ends: 499 [2020-08-21 19:52:14,546 INFO L226 Difference]: Without dead ends: 449 [2020-08-21 19:52:14,547 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 19:52:14,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-21 19:52:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-21 19:52:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-21 19:52:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-21 19:52:14,558 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-21 19:52:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:14,558 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-21 19:52:14,559 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-21 19:52:14,559 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-21 19:52:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-21 19:52:14,559 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:14,560 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 19:52:14,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-21 19:52:14,560 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:14,560 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-21 19:52:14,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:14,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296802713] [2020-08-21 19:52:14,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:14,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:14,805 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:14,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:14,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-21 19:52:14,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:14,827 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 19:52:14,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:14,835 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 19:52:14,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296802713] [2020-08-21 19:52:14,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:14,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-21 19:52:14,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072763345] [2020-08-21 19:52:14,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-21 19:52:14,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:14,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-21 19:52:14,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-21 19:52:14,839 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-21 19:52:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:16,029 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-21 19:52:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-21 19:52:16,030 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-21 19:52:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:16,035 INFO L225 Difference]: With dead ends: 522 [2020-08-21 19:52:16,035 INFO L226 Difference]: Without dead ends: 472 [2020-08-21 19:52:16,036 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 19:52:16,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-21 19:52:16,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-21 19:52:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-21 19:52:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-21 19:52:16,049 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-21 19:52:16,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:16,049 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-21 19:52:16,049 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-21 19:52:16,049 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-21 19:52:16,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-21 19:52:16,050 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:16,050 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 19:52:16,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-21 19:52:16,051 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:16,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:16,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-21 19:52:16,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:16,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069554340] [2020-08-21 19:52:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:16,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:16,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:16,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:16,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-21 19:52:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:16,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 19:52:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:16,354 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 19:52:16,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069554340] [2020-08-21 19:52:16,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:16,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-21 19:52:16,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787967788] [2020-08-21 19:52:16,356 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-21 19:52:16,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:16,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-21 19:52:16,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-21 19:52:16,357 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-21 19:52:17,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:17,793 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-21 19:52:17,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-21 19:52:17,793 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-21 19:52:17,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:17,797 INFO L225 Difference]: With dead ends: 545 [2020-08-21 19:52:17,798 INFO L226 Difference]: Without dead ends: 495 [2020-08-21 19:52:17,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=360, Unknown=0, NotChecked=0, Total=600 [2020-08-21 19:52:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-21 19:52:17,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-21 19:52:17,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-21 19:52:17,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-21 19:52:17,814 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-21 19:52:17,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:17,814 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-21 19:52:17,814 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-21 19:52:17,815 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-21 19:52:17,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-21 19:52:17,815 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:17,816 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 19:52:17,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-21 19:52:17,816 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:17,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:17,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-21 19:52:17,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:17,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968206855] [2020-08-21 19:52:17,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:17,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:18,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:18,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:18,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-21 19:52:18,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:18,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 19:52:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:18,143 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 19:52:18,144 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968206855] [2020-08-21 19:52:18,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:18,144 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-21 19:52:18,144 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066420734] [2020-08-21 19:52:18,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-21 19:52:18,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:18,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-21 19:52:18,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-21 19:52:18,146 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-21 19:52:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:19,332 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-21 19:52:19,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-21 19:52:19,333 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-21 19:52:19,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:19,336 INFO L225 Difference]: With dead ends: 568 [2020-08-21 19:52:19,336 INFO L226 Difference]: Without dead ends: 518 [2020-08-21 19:52:19,337 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 19:52:19,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-21 19:52:19,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-21 19:52:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-21 19:52:19,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-21 19:52:19,347 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-21 19:52:19,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:19,348 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-21 19:52:19,348 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-21 19:52:19,348 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-21 19:52:19,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-21 19:52:19,349 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:19,349 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 19:52:19,349 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-21 19:52:19,349 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:19,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:19,350 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-21 19:52:19,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:19,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1140716345] [2020-08-21 19:52:19,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:19,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:19,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:19,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-21 19:52:19,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:19,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 19:52:19,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:19,688 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 19:52:19,690 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1140716345] [2020-08-21 19:52:19,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:19,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-21 19:52:19,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131857843] [2020-08-21 19:52:19,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-21 19:52:19,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:19,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-21 19:52:19,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-21 19:52:19,693 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-21 19:52:21,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:21,130 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-21 19:52:21,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-21 19:52:21,132 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-21 19:52:21,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:21,135 INFO L225 Difference]: With dead ends: 591 [2020-08-21 19:52:21,136 INFO L226 Difference]: Without dead ends: 541 [2020-08-21 19:52:21,139 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 19:52:21,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-21 19:52:21,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-21 19:52:21,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-21 19:52:21,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-21 19:52:21,152 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-21 19:52:21,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:21,152 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-21 19:52:21,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-21 19:52:21,152 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-21 19:52:21,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-21 19:52:21,153 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:21,154 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 19:52:21,154 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-21 19:52:21,154 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:21,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:21,154 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-21 19:52:21,155 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:21,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293764530] [2020-08-21 19:52:21,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:21,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:21,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:21,517 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-21 19:52:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:21,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 19:52:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:21,550 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 19:52:21,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293764530] [2020-08-21 19:52:21,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:21,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-21 19:52:21,551 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153219897] [2020-08-21 19:52:21,551 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-21 19:52:21,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:21,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-21 19:52:21,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-21 19:52:21,552 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-21 19:52:22,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:22,866 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-21 19:52:22,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-21 19:52:22,866 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-21 19:52:22,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:22,869 INFO L225 Difference]: With dead ends: 614 [2020-08-21 19:52:22,870 INFO L226 Difference]: Without dead ends: 564 [2020-08-21 19:52:22,871 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 19:52:22,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-21 19:52:22,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-21 19:52:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-21 19:52:22,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-21 19:52:22,882 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-21 19:52:22,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:22,882 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-21 19:52:22,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-21 19:52:22,882 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-21 19:52:22,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-21 19:52:22,883 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:22,883 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 19:52:22,883 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-21 19:52:22,884 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:22,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:22,884 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-21 19:52:22,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:22,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1488123289] [2020-08-21 19:52:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:23,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:23,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:23,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-21 19:52:23,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:23,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 19:52:23,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:23,270 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 19:52:23,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1488123289] [2020-08-21 19:52:23,271 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:23,271 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-21 19:52:23,271 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358361429] [2020-08-21 19:52:23,271 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-21 19:52:23,272 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:23,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-21 19:52:23,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-21 19:52:23,272 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-21 19:52:25,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:25,194 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-21 19:52:25,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-21 19:52:25,195 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-21 19:52:25,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:25,200 INFO L225 Difference]: With dead ends: 637 [2020-08-21 19:52:25,200 INFO L226 Difference]: Without dead ends: 587 [2020-08-21 19:52:25,203 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 19:52:25,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-21 19:52:25,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-21 19:52:25,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-21 19:52:25,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-21 19:52:25,225 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-21 19:52:25,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:25,226 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-21 19:52:25,226 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-21 19:52:25,226 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-21 19:52:25,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-21 19:52:25,227 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:25,228 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 19:52:25,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-21 19:52:25,228 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:25,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:25,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-21 19:52:25,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:25,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765044537] [2020-08-21 19:52:25,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:25,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:25,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:25,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-21 19:52:25,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:25,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 19:52:25,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:25,800 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 19:52:25,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765044537] [2020-08-21 19:52:25,801 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:25,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-21 19:52:25,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955421521] [2020-08-21 19:52:25,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-21 19:52:25,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:25,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-21 19:52:25,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-21 19:52:25,806 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-21 19:52:28,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:28,100 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-21 19:52:28,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-21 19:52:28,101 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-21 19:52:28,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:28,106 INFO L225 Difference]: With dead ends: 660 [2020-08-21 19:52:28,106 INFO L226 Difference]: Without dead ends: 610 [2020-08-21 19:52:28,108 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-21 19:52:28,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-21 19:52:28,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-21 19:52:28,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-21 19:52:28,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-21 19:52:28,129 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-21 19:52:28,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:28,130 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-21 19:52:28,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-21 19:52:28,130 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-21 19:52:28,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-21 19:52:28,132 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:28,132 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 19:52:28,133 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-21 19:52:28,133 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:28,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:28,134 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-21 19:52:28,134 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:28,134 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471753426] [2020-08-21 19:52:28,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:28,685 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:28,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-21 19:52:28,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:28,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 19:52:28,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:28,742 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 19:52:28,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471753426] [2020-08-21 19:52:28,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:28,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-21 19:52:28,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114045087] [2020-08-21 19:52:28,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-21 19:52:28,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-21 19:52:28,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-21 19:52:28,746 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-21 19:52:30,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:30,577 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-21 19:52:30,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-21 19:52:30,580 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-21 19:52:30,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:30,584 INFO L225 Difference]: With dead ends: 683 [2020-08-21 19:52:30,584 INFO L226 Difference]: Without dead ends: 633 [2020-08-21 19:52:30,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-21 19:52:30,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-21 19:52:30,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-21 19:52:30,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-21 19:52:30,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-21 19:52:30,594 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-21 19:52:30,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:30,595 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-21 19:52:30,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-21 19:52:30,595 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-21 19:52:30,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-21 19:52:30,596 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:30,596 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 19:52:30,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-21 19:52:30,596 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:30,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:30,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-21 19:52:30,597 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:30,597 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247707921] [2020-08-21 19:52:30,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:30,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:31,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:31,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:31,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-21 19:52:31,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:31,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 19:52:31,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:31,076 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 19:52:31,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247707921] [2020-08-21 19:52:31,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:31,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-21 19:52:31,077 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417399424] [2020-08-21 19:52:31,077 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-21 19:52:31,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:31,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-21 19:52:31,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-21 19:52:31,078 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-21 19:52:33,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:33,121 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-21 19:52:33,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-21 19:52:33,121 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-21 19:52:33,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:33,125 INFO L225 Difference]: With dead ends: 706 [2020-08-21 19:52:33,125 INFO L226 Difference]: Without dead ends: 656 [2020-08-21 19:52:33,126 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 19:52:33,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-21 19:52:33,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-21 19:52:33,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-21 19:52:33,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-21 19:52:33,137 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-21 19:52:33,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:33,137 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-21 19:52:33,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-21 19:52:33,137 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-21 19:52:33,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-21 19:52:33,138 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:33,138 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 19:52:33,139 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-21 19:52:33,139 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:33,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:33,139 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-21 19:52:33,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:33,140 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2136481391] [2020-08-21 19:52:33,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:33,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,630 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:33,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,633 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-21 19:52:33,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,660 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 19:52:33,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:33,672 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 19:52:33,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2136481391] [2020-08-21 19:52:33,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:33,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-21 19:52:33,673 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298474785] [2020-08-21 19:52:33,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-21 19:52:33,675 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:33,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-21 19:52:33,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-21 19:52:33,676 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-21 19:52:35,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:35,828 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-21 19:52:35,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-21 19:52:35,829 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-21 19:52:35,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:35,834 INFO L225 Difference]: With dead ends: 729 [2020-08-21 19:52:35,834 INFO L226 Difference]: Without dead ends: 679 [2020-08-21 19:52:35,835 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 19:52:35,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-21 19:52:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-21 19:52:35,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-21 19:52:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-21 19:52:35,847 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-21 19:52:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:35,847 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-21 19:52:35,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-21 19:52:35,847 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-21 19:52:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-21 19:52:35,848 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:35,848 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 19:52:35,849 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-21 19:52:35,849 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:35,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-21 19:52:35,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:35,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541010290] [2020-08-21 19:52:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:35,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:36,321 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:36,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:36,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-21 19:52:36,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:36,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-21 19:52:36,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:36,359 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 19:52:36,359 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541010290] [2020-08-21 19:52:36,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:36,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-21 19:52:36,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712759006] [2020-08-21 19:52:36,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-21 19:52:36,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:36,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-21 19:52:36,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-21 19:52:36,362 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-21 19:52:38,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:38,215 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-21 19:52:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-21 19:52:38,215 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-21 19:52:38,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:38,218 INFO L225 Difference]: With dead ends: 752 [2020-08-21 19:52:38,219 INFO L226 Difference]: Without dead ends: 702 [2020-08-21 19:52:38,220 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=474, Invalid=648, Unknown=0, NotChecked=0, Total=1122 [2020-08-21 19:52:38,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-21 19:52:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-21 19:52:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-21 19:52:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-21 19:52:38,231 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-21 19:52:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:38,231 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-21 19:52:38,232 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-21 19:52:38,232 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-21 19:52:38,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-21 19:52:38,233 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:38,233 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 19:52:38,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-21 19:52:38,233 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:38,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-21 19:52:38,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:38,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640535529] [2020-08-21 19:52:38,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:38,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-21 19:52:38,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-21 19:52:38,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,307 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 19:52:38,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640535529] [2020-08-21 19:52:38,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:38,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-21 19:52:38,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103003013] [2020-08-21 19:52:38,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-21 19:52:38,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:38,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-21 19:52:38,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-21 19:52:38,309 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-21 19:52:38,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:38,446 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-21 19:52:38,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-21 19:52:38,446 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-21 19:52:38,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:38,447 INFO L225 Difference]: With dead ends: 177 [2020-08-21 19:52:38,447 INFO L226 Difference]: Without dead ends: 132 [2020-08-21 19:52:38,448 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 19:52:38,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-21 19:52:38,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-21 19:52:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-21 19:52:38,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-21 19:52:38,452 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-21 19:52:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:38,453 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-21 19:52:38,453 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-21 19:52:38,453 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-21 19:52:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-21 19:52:38,454 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:38,454 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 19:52:38,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-21 19:52:38,454 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:38,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:38,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-21 19:52:38,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:38,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [395756627] [2020-08-21 19:52:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:38,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,512 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:38,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-21 19:52:38,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-21 19:52:38,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,526 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 19:52:38,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [395756627] [2020-08-21 19:52:38,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-21 19:52:38,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-21 19:52:38,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395208682] [2020-08-21 19:52:38,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:52:38,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:38,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:52:38,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:52:38,528 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-21 19:52:38,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:38,692 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-21 19:52:38,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:52:38,693 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-21 19:52:38,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:38,694 INFO L225 Difference]: With dead ends: 200 [2020-08-21 19:52:38,695 INFO L226 Difference]: Without dead ends: 155 [2020-08-21 19:52:38,695 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 19:52:38,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-21 19:52:38,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-21 19:52:38,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-21 19:52:38,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-21 19:52:38,701 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-21 19:52:38,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:38,702 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-21 19:52:38,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:52:38,702 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-21 19:52:38,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 19:52:38,703 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:38,703 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 19:52:38,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-21 19:52:38,704 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:38,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:38,704 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-21 19:52:38,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:38,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [996911056] [2020-08-21 19:52:38,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:38,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 19:52:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 19:52:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:38,797 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 19:52:38,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [996911056] [2020-08-21 19:52:38,798 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:38,799 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-21 19:52:38,799 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435588251] [2020-08-21 19:52:38,799 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-21 19:52:38,800 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:38,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-21 19:52:38,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-21 19:52:38,801 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-21 19:52:38,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:38,976 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-21 19:52:38,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-21 19:52:38,977 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-21 19:52:38,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:38,978 INFO L225 Difference]: With dead ends: 187 [2020-08-21 19:52:38,978 INFO L226 Difference]: Without dead ends: 139 [2020-08-21 19:52:38,979 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 19:52:38,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-21 19:52:38,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-21 19:52:38,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-21 19:52:38,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-21 19:52:38,985 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-21 19:52:38,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:38,986 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-21 19:52:38,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-21 19:52:38,986 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-21 19:52:38,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-21 19:52:38,987 INFO L414 BasicCegarLoop]: Found error trace [2020-08-21 19:52:38,987 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 19:52:38,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-21 19:52:38,988 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-21 19:52:38,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-21 19:52:38,988 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-21 19:52:38,988 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-21 19:52:38,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579876502] [2020-08-21 19:52:38,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-21 19:52:39,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:39,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-21 19:52:39,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:39,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-21 19:52:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:39,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-21 19:52:39,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-21 19:52:39,094 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 19:52:39,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579876502] [2020-08-21 19:52:39,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-21 19:52:39,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-21 19:52:39,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137819673] [2020-08-21 19:52:39,095 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-21 19:52:39,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-21 19:52:39,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-21 19:52:39,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-21 19:52:39,096 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-21 19:52:39,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-21 19:52:39,269 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-21 19:52:39,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-21 19:52:39,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-21 19:52:39,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-21 19:52:39,270 INFO L225 Difference]: With dead ends: 157 [2020-08-21 19:52:39,271 INFO L226 Difference]: Without dead ends: 0 [2020-08-21 19:52:39,271 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 19:52:39,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-21 19:52:39,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-21 19:52:39,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-21 19:52:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-21 19:52:39,272 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-21 19:52:39,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-21 19:52:39,273 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-21 19:52:39,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-21 19:52:39,273 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-21 19:52:39,273 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-21 19:52:39,273 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-21 19:52:39,279 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-21 19:52:39,592 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-21 19:52:39,592 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-21 19:52:39,592 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-21 19:52:39,593 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-21 19:52:39,593 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-21 19:52:39,593 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 19:52:39,593 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-21 19:52:39,593 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:52:39,593 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 19:52:39,594 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:52:39,594 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-21 19:52:39,594 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-21 19:52:39,594 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-21 19:52:39,594 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-21 19:52:39,594 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-21 19:52:39,594 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-21 19:52:39,594 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-21 19:52:39,595 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-21 19:52:39,595 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-21 19:52:39,595 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-21 19:52:39,595 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-21 19:52:39,595 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 19:52:39,595 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-21 19:52:39,595 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 19:52:39,596 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-21 19:52:39,596 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-21 19:52:39,596 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 19:52:39,596 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-21 19:52:39,596 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-21 19:52:39,596 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-21 19:52:39,597 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-21 19:52:39,597 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-21 19:52:39,597 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-21 19:52:39,597 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-21 19:52:39,597 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-21 19:52:39,597 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-21 19:52:39,597 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 19:52:39,598 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-21 19:52:39,598 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-21 19:52:39,598 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-21 19:52:39,598 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-21 19:52:39,598 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-21 19:52:39,598 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 19:52:39,598 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-21 19:52:39,599 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 19:52:39,599 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-21 19:52:39,599 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-21 19:52:39,599 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-21 19:52:39,599 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-21 19:52:39,599 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 19:52:39,599 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-21 19:52:39,600 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-21 19:52:39,600 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-21 19:52:39,600 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-21 19:52:39,600 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-21 19:52:39,600 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-21 19:52:39,600 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-21 19:52:39,600 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-21 19:52:39,601 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-21 19:52:39,601 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-21 19:52:39,601 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-21 19:52:39,623 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 07:52:39 BoogieIcfgContainer [2020-08-21 19:52:39,623 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-21 19:52:39,626 INFO L168 Benchmark]: Toolchain (without parser) took 40474.63 ms. Allocated memory was 140.5 MB in the beginning and 490.7 MB in the end (delta: 350.2 MB). Free memory was 103.7 MB in the beginning and 411.6 MB in the end (delta: -307.9 MB). Peak memory consumption was 42.4 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:39,627 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 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 19:52:39,627 INFO L168 Benchmark]: CACSL2BoogieTranslator took 292.45 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:39,627 INFO L168 Benchmark]: Boogie Preprocessor took 145.35 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:39,628 INFO L168 Benchmark]: RCFGBuilder took 495.00 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 157.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:39,629 INFO L168 Benchmark]: TraceAbstraction took 39537.06 ms. Allocated memory was 203.9 MB in the beginning and 490.7 MB in the end (delta: 286.8 MB). Free memory was 156.8 MB in the beginning and 411.6 MB in the end (delta: -254.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. [2020-08-21 19:52:39,631 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 140.5 MB. Free memory was 122.0 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 292.45 ms. Allocated memory is still 140.5 MB. Free memory was 103.5 MB in the beginning and 92.4 MB in the end (delta: 11.2 MB). Peak memory consumption was 11.2 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 145.35 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 92.4 MB in the beginning and 181.3 MB in the end (delta: -88.9 MB). Peak memory consumption was 12.2 MB. Max. memory is 7.1 GB. * RCFGBuilder took 495.00 ms. Allocated memory is still 203.9 MB. Free memory was 181.3 MB in the beginning and 157.4 MB in the end (delta: 23.9 MB). Peak memory consumption was 23.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 39537.06 ms. Allocated memory was 203.9 MB in the beginning and 490.7 MB in the end (delta: 286.8 MB). Free memory was 156.8 MB in the beginning and 411.6 MB in the end (delta: -254.8 MB). Peak memory consumption was 32.0 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 2]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 22]: Loop Invariant Derived loop invariant: n == 0 - InvariantResult [Line: 28]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 44]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 11]: Loop Invariant Derived loop invariant: 0 <= i && size == \old(size) - InvariantResult [Line: 50]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 29]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 45]: Loop Invariant Derived loop invariant: 0 - InvariantResult [Line: 40]: Loop Invariant Derived loop invariant: x == 0 && n == 0 - InvariantResult [Line: 51]: Loop Invariant Derived loop invariant: 0 - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 39.1s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 30.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.3s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 20.5s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.6s 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: 0.3s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.2s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 7.1s InterpolantComputationTime, 1992 NumberOfCodeBlocks, 1992 NumberOfCodeBlocksAsserted, 33 NumberOfCheckSat, 1959 ConstructedInterpolants, 0 QuantifiedInterpolants, 278362 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 33 InterpolantComputations, 5 PerfectInterpolantSequences, 3160/10091 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...