/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 false -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 0.1.25-5644d1e-m [2020-08-18 10:38:41,319 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-08-18 10:38:41,322 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-08-18 10:38:41,362 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-08-18 10:38:41,362 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-08-18 10:38:41,370 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-08-18 10:38:41,373 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-08-18 10:38:41,377 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-08-18 10:38:41,379 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-08-18 10:38:41,382 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-08-18 10:38:41,383 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-08-18 10:38:41,384 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-08-18 10:38:41,384 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-08-18 10:38:41,387 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-08-18 10:38:41,389 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-08-18 10:38:41,391 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-08-18 10:38:41,393 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-08-18 10:38:41,394 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-08-18 10:38:41,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-08-18 10:38:41,403 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-08-18 10:38:41,406 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-08-18 10:38:41,407 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-08-18 10:38:41,408 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-08-18 10:38:41,409 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-08-18 10:38:41,421 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-08-18 10:38:41,422 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-08-18 10:38:41,422 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-08-18 10:38:41,428 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-08-18 10:38:41,428 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-08-18 10:38:41,429 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-08-18 10:38:41,430 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-08-18 10:38:41,430 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-08-18 10:38:41,434 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-08-18 10:38:41,435 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-08-18 10:38:41,436 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-08-18 10:38:41,436 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-08-18 10:38:41,437 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-08-18 10:38:41,437 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-08-18 10:38:41,438 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-08-18 10:38:41,442 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-08-18 10:38:41,442 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-08-18 10:38:41,444 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 [2020-08-18 10:38:41,484 INFO L113 SettingsManager]: Loading preferences was successful [2020-08-18 10:38:41,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-08-18 10:38:41,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-08-18 10:38:41,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-08-18 10:38:41,487 INFO L138 SettingsManager]: * Use SBE=true [2020-08-18 10:38:41,487 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-08-18 10:38:41,487 INFO L138 SettingsManager]: * sizeof long=4 [2020-08-18 10:38:41,487 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-08-18 10:38:41,488 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-08-18 10:38:41,488 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-08-18 10:38:41,489 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-08-18 10:38:41,489 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-08-18 10:38:41,489 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-08-18 10:38:41,490 INFO L138 SettingsManager]: * sizeof long double=12 [2020-08-18 10:38:41,490 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-08-18 10:38:41,490 INFO L138 SettingsManager]: * Use constant arrays=true [2020-08-18 10:38:41,490 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-08-18 10:38:41,490 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-08-18 10:38:41,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-08-18 10:38:41,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-08-18 10:38:41,491 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-08-18 10:38:41,491 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-08-18 10:38:41,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-08-18 10:38:41,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-08-18 10:38:41,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-08-18 10:38:41,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-08-18 10:38:41,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-08-18 10:38:41,492 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-08-18 10:38:41,493 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-08-18 10:38:41,493 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 -> false [2020-08-18 10:38:41,820 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-08-18 10:38:41,832 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-08-18 10:38:41,836 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-08-18 10:38:41,837 INFO L271 PluginConnector]: Initializing CDTParser... [2020-08-18 10:38:41,837 INFO L275 PluginConnector]: CDTParser initialized [2020-08-18 10:38:41,838 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 10:38:41,906 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91acc5f1d/7e01862f64384af9afc2c12e7ce71bd6/FLAG6a3e00d43 [2020-08-18 10:38:42,410 INFO L306 CDTParser]: Found 1 translation units. [2020-08-18 10:38:42,410 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/data_structures_set_multi_proc_trivial_ground.i [2020-08-18 10:38:42,419 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91acc5f1d/7e01862f64384af9afc2c12e7ce71bd6/FLAG6a3e00d43 [2020-08-18 10:38:42,754 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/91acc5f1d/7e01862f64384af9afc2c12e7ce71bd6 [2020-08-18 10:38:42,764 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-08-18 10:38:42,766 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-08-18 10:38:42,767 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-08-18 10:38:42,767 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-08-18 10:38:42,771 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-08-18 10:38:42,772 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:38:42" (1/1) ... [2020-08-18 10:38:42,775 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1922398b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:42, skipping insertion in model container [2020-08-18 10:38:42,776 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.08 10:38:42" (1/1) ... [2020-08-18 10:38:42,783 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-08-18 10:38:42,803 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-08-18 10:38:43,020 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:38:43,029 INFO L203 MainTranslator]: Completed pre-run [2020-08-18 10:38:43,054 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-08-18 10:38:43,153 INFO L208 MainTranslator]: Completed translation [2020-08-18 10:38:43,154 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43 WrapperNode [2020-08-18 10:38:43,154 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-08-18 10:38:43,155 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-08-18 10:38:43,155 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-08-18 10:38:43,155 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-08-18 10:38:43,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,168 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,177 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,177 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,187 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,195 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,197 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (1/1) ... [2020-08-18 10:38:43,200 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-08-18 10:38:43,201 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-08-18 10:38:43,201 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-08-18 10:38:43,201 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-08-18 10:38:43,202 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (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 [2020-08-18 10:38:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-08-18 10:38:43,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-08-18 10:38:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-08-18 10:38:43,278 INFO L138 BoogieDeclarations]: Found implementation of procedure insert [2020-08-18 10:38:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure elem_exists [2020-08-18 10:38:43,279 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-08-18 10:38:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-08-18 10:38:43,279 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure insert [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure elem_exists [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-08-18 10:38:43,280 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-08-18 10:38:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-08-18 10:38:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-08-18 10:38:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-08-18 10:38:43,281 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-08-18 10:38:43,713 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-08-18 10:38:43,713 INFO L295 CfgBuilder]: Removed 10 assume(true) statements. [2020-08-18 10:38:43,718 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:38:43 BoogieIcfgContainer [2020-08-18 10:38:43,718 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-08-18 10:38:43,719 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-08-18 10:38:43,720 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-08-18 10:38:43,723 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-08-18 10:38:43,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.08 10:38:42" (1/3) ... [2020-08-18 10:38:43,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd0c98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:38:43, skipping insertion in model container [2020-08-18 10:38:43,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.08 10:38:43" (2/3) ... [2020-08-18 10:38:43,725 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fd0c98c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.08 10:38:43, skipping insertion in model container [2020-08-18 10:38:43,725 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.08 10:38:43" (3/3) ... [2020-08-18 10:38:43,727 INFO L109 eAbstractionObserver]: Analyzing ICFG data_structures_set_multi_proc_trivial_ground.i [2020-08-18 10:38:43,738 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-08-18 10:38:43,746 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-08-18 10:38:43,760 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-08-18 10:38:43,781 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-08-18 10:38:43,781 INFO L376 AbstractCegarLoop]: Hoare is true [2020-08-18 10:38:43,781 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-08-18 10:38:43,781 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-08-18 10:38:43,782 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-08-18 10:38:43,782 INFO L380 AbstractCegarLoop]: Difference is false [2020-08-18 10:38:43,782 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-08-18 10:38:43,782 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-08-18 10:38:43,800 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states. [2020-08-18 10:38:43,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-08-18 10:38:43,805 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:43,805 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:38:43,806 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:43,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:43,811 INFO L82 PathProgramCache]: Analyzing trace with hash 528217166, now seen corresponding path program 1 times [2020-08-18 10:38:43,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:43,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830498388] [2020-08-18 10:38:43,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:43,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:43,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:44,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:44,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830498388] [2020-08-18 10:38:44,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:38:44,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-08-18 10:38:44,014 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168482487] [2020-08-18 10:38:44,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-08-18 10:38:44,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:44,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-08-18 10:38:44,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-08-18 10:38:44,030 INFO L87 Difference]: Start difference. First operand 61 states. Second operand 4 states. [2020-08-18 10:38:44,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:44,328 INFO L93 Difference]: Finished difference Result 150 states and 228 transitions. [2020-08-18 10:38:44,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-08-18 10:38:44,330 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 14 [2020-08-18 10:38:44,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:44,341 INFO L225 Difference]: With dead ends: 150 [2020-08-18 10:38:44,342 INFO L226 Difference]: Without dead ends: 89 [2020-08-18 10:38:44,346 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 [2020-08-18 10:38:44,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-08-18 10:38:44,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 57. [2020-08-18 10:38:44,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-08-18 10:38:44,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2020-08-18 10:38:44,403 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 14 [2020-08-18 10:38:44,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:44,404 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2020-08-18 10:38:44,404 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-08-18 10:38:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2020-08-18 10:38:44,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-08-18 10:38:44,405 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:44,405 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:38:44,406 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-08-18 10:38:44,406 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:44,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:44,407 INFO L82 PathProgramCache]: Analyzing trace with hash 396779504, now seen corresponding path program 1 times [2020-08-18 10:38:44,407 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:44,407 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [355880348] [2020-08-18 10:38:44,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:44,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:44,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:44,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:44,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [355880348] [2020-08-18 10:38:44,501 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:44,501 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-08-18 10:38:44,502 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607774234] [2020-08-18 10:38:44,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:38:44,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:44,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:38:44,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:38:44,505 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand 5 states. [2020-08-18 10:38:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:44,823 INFO L93 Difference]: Finished difference Result 170 states and 222 transitions. [2020-08-18 10:38:44,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 10:38:44,824 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-08-18 10:38:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:44,829 INFO L225 Difference]: With dead ends: 170 [2020-08-18 10:38:44,829 INFO L226 Difference]: Without dead ends: 122 [2020-08-18 10:38:44,831 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 [2020-08-18 10:38:44,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-08-18 10:38:44,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 59. [2020-08-18 10:38:44,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-08-18 10:38:44,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2020-08-18 10:38:44,861 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 16 [2020-08-18 10:38:44,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:44,862 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2020-08-18 10:38:44,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:38:44,862 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2020-08-18 10:38:44,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-08-18 10:38:44,865 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:44,866 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:38:44,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-08-18 10:38:44,866 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:44,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:44,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1360762094, now seen corresponding path program 2 times [2020-08-18 10:38:44,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:44,868 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1259780435] [2020-08-18 10:38:44,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:44,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:45,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:45,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1259780435] [2020-08-18 10:38:45,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:45,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 10:38:45,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692787612] [2020-08-18 10:38:45,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 10:38:45,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:45,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 10:38:45,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:38:45,029 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand 6 states. [2020-08-18 10:38:45,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:45,353 INFO L93 Difference]: Finished difference Result 203 states and 268 transitions. [2020-08-18 10:38:45,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:38:45,354 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 18 [2020-08-18 10:38:45,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:45,357 INFO L225 Difference]: With dead ends: 203 [2020-08-18 10:38:45,357 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 10:38:45,358 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 [2020-08-18 10:38:45,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 10:38:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 61. [2020-08-18 10:38:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-08-18 10:38:45,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-08-18 10:38:45,371 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 18 [2020-08-18 10:38:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:45,371 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-08-18 10:38:45,372 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 10:38:45,372 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-08-18 10:38:45,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-08-18 10:38:45,372 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:45,373 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:38:45,373 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-08-18 10:38:45,373 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:45,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:45,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1858876852, now seen corresponding path program 3 times [2020-08-18 10:38:45,374 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:45,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1643131180] [2020-08-18 10:38:45,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:45,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,447 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:45,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:45,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1643131180] [2020-08-18 10:38:45,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:45,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-08-18 10:38:45,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589865906] [2020-08-18 10:38:45,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 10:38:45,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:45,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 10:38:45,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:38:45,455 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 7 states. [2020-08-18 10:38:45,846 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:45,846 INFO L93 Difference]: Finished difference Result 236 states and 314 transitions. [2020-08-18 10:38:45,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 10:38:45,847 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 20 [2020-08-18 10:38:45,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:45,849 INFO L225 Difference]: With dead ends: 236 [2020-08-18 10:38:45,849 INFO L226 Difference]: Without dead ends: 188 [2020-08-18 10:38:45,850 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 [2020-08-18 10:38:45,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-08-18 10:38:45,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 63. [2020-08-18 10:38:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-08-18 10:38:45,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 76 transitions. [2020-08-18 10:38:45,862 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 76 transitions. Word has length 20 [2020-08-18 10:38:45,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:45,862 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 76 transitions. [2020-08-18 10:38:45,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 10:38:45,863 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 76 transitions. [2020-08-18 10:38:45,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-08-18 10:38:45,864 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:45,864 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-08-18 10:38:45,864 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-08-18 10:38:45,864 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:45,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:45,865 INFO L82 PathProgramCache]: Analyzing trace with hash -739516458, now seen corresponding path program 4 times [2020-08-18 10:38:45,865 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:45,865 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [947025919] [2020-08-18 10:38:45,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:45,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-08-18 10:38:45,938 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [947025919] [2020-08-18 10:38:45,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:38:45,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:38:45,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820939825] [2020-08-18 10:38:45,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:38:45,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:45,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:38:45,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:38:45,940 INFO L87 Difference]: Start difference. First operand 63 states and 76 transitions. Second operand 5 states. [2020-08-18 10:38:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:46,053 INFO L93 Difference]: Finished difference Result 116 states and 144 transitions. [2020-08-18 10:38:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-08-18 10:38:46,054 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-08-18 10:38:46,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:46,055 INFO L225 Difference]: With dead ends: 116 [2020-08-18 10:38:46,055 INFO L226 Difference]: Without dead ends: 67 [2020-08-18 10:38:46,056 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 [2020-08-18 10:38:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-08-18 10:38:46,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2020-08-18 10:38:46,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-08-18 10:38:46,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2020-08-18 10:38:46,064 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 22 [2020-08-18 10:38:46,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:46,064 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2020-08-18 10:38:46,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:38:46,065 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2020-08-18 10:38:46,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-08-18 10:38:46,066 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:46,066 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] [2020-08-18 10:38:46,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-08-18 10:38:46,067 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:46,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:46,067 INFO L82 PathProgramCache]: Analyzing trace with hash -1301458888, now seen corresponding path program 1 times [2020-08-18 10:38:46,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:46,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1754734629] [2020-08-18 10:38:46,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:46,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:46,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2020-08-18 10:38:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,173 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 10:38:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,183 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:46,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1754734629] [2020-08-18 10:38:46,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:46,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-08-18 10:38:46,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228586602] [2020-08-18 10:38:46,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-08-18 10:38:46,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:46,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-08-18 10:38:46,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-08-18 10:38:46,186 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand 9 states. [2020-08-18 10:38:46,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:46,527 INFO L93 Difference]: Finished difference Result 223 states and 292 transitions. [2020-08-18 10:38:46,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-08-18 10:38:46,533 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 41 [2020-08-18 10:38:46,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:46,535 INFO L225 Difference]: With dead ends: 223 [2020-08-18 10:38:46,535 INFO L226 Difference]: Without dead ends: 173 [2020-08-18 10:38:46,536 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 [2020-08-18 10:38:46,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-08-18 10:38:46,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 67. [2020-08-18 10:38:46,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-08-18 10:38:46,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 79 transitions. [2020-08-18 10:38:46,546 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 79 transitions. Word has length 41 [2020-08-18 10:38:46,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:46,546 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 79 transitions. [2020-08-18 10:38:46,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-08-18 10:38:46,547 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 79 transitions. [2020-08-18 10:38:46,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-08-18 10:38:46,548 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:46,548 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] [2020-08-18 10:38:46,549 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-08-18 10:38:46,549 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:46,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:46,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1302417578, now seen corresponding path program 2 times [2020-08-18 10:38:46,549 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:46,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508385887] [2020-08-18 10:38:46,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2020-08-18 10:38:46,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 10:38:46,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:46,694 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:46,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508385887] [2020-08-18 10:38:46,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:46,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-08-18 10:38:46,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757530425] [2020-08-18 10:38:46,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-08-18 10:38:46,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:46,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-08-18 10:38:46,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2020-08-18 10:38:46,708 INFO L87 Difference]: Start difference. First operand 67 states and 79 transitions. Second operand 10 states. [2020-08-18 10:38:47,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:47,145 INFO L93 Difference]: Finished difference Result 246 states and 324 transitions. [2020-08-18 10:38:47,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-08-18 10:38:47,146 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 43 [2020-08-18 10:38:47,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:47,148 INFO L225 Difference]: With dead ends: 246 [2020-08-18 10:38:47,149 INFO L226 Difference]: Without dead ends: 196 [2020-08-18 10:38:47,150 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 [2020-08-18 10:38:47,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-08-18 10:38:47,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 69. [2020-08-18 10:38:47,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-08-18 10:38:47,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 81 transitions. [2020-08-18 10:38:47,161 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 81 transitions. Word has length 43 [2020-08-18 10:38:47,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:47,161 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 81 transitions. [2020-08-18 10:38:47,162 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-08-18 10:38:47,162 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 81 transitions. [2020-08-18 10:38:47,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-08-18 10:38:47,163 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:47,163 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] [2020-08-18 10:38:47,164 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-08-18 10:38:47,164 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:47,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:47,164 INFO L82 PathProgramCache]: Analyzing trace with hash 2071248628, now seen corresponding path program 3 times [2020-08-18 10:38:47,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:47,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521760340] [2020-08-18 10:38:47,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,246 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:47,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-08-18 10:38:47,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 10:38:47,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,274 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:47,274 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521760340] [2020-08-18 10:38:47,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:47,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-08-18 10:38:47,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040564470] [2020-08-18 10:38:47,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-08-18 10:38:47,276 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:47,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-08-18 10:38:47,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-08-18 10:38:47,276 INFO L87 Difference]: Start difference. First operand 69 states and 81 transitions. Second operand 11 states. [2020-08-18 10:38:47,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:47,785 INFO L93 Difference]: Finished difference Result 269 states and 356 transitions. [2020-08-18 10:38:47,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-08-18 10:38:47,785 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-08-18 10:38:47,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:47,787 INFO L225 Difference]: With dead ends: 269 [2020-08-18 10:38:47,788 INFO L226 Difference]: Without dead ends: 219 [2020-08-18 10:38:47,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-08-18 10:38:47,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-08-18 10:38:47,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 71. [2020-08-18 10:38:47,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-08-18 10:38:47,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 83 transitions. [2020-08-18 10:38:47,821 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 83 transitions. Word has length 45 [2020-08-18 10:38:47,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:47,822 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 83 transitions. [2020-08-18 10:38:47,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-08-18 10:38:47,822 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 83 transitions. [2020-08-18 10:38:47,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-08-18 10:38:47,824 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:47,824 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] [2020-08-18 10:38:47,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-08-18 10:38:47,824 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:47,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:47,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1464164114, now seen corresponding path program 4 times [2020-08-18 10:38:47,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:47,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1888753530] [2020-08-18 10:38:47,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2020-08-18 10:38:47,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 10:38:47,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:47,967 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:47,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1888753530] [2020-08-18 10:38:47,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:47,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-08-18 10:38:47,968 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724141875] [2020-08-18 10:38:47,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-08-18 10:38:47,969 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:47,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-08-18 10:38:47,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-08-18 10:38:47,969 INFO L87 Difference]: Start difference. First operand 71 states and 83 transitions. Second operand 12 states. [2020-08-18 10:38:48,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:48,482 INFO L93 Difference]: Finished difference Result 292 states and 388 transitions. [2020-08-18 10:38:48,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-08-18 10:38:48,482 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 47 [2020-08-18 10:38:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:48,485 INFO L225 Difference]: With dead ends: 292 [2020-08-18 10:38:48,485 INFO L226 Difference]: Without dead ends: 242 [2020-08-18 10:38:48,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:38:48,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-08-18 10:38:48,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 73. [2020-08-18 10:38:48,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-08-18 10:38:48,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 85 transitions. [2020-08-18 10:38:48,498 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 85 transitions. Word has length 47 [2020-08-18 10:38:48,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:48,498 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 85 transitions. [2020-08-18 10:38:48,498 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-08-18 10:38:48,498 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 85 transitions. [2020-08-18 10:38:48,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-08-18 10:38:48,499 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:48,500 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] [2020-08-18 10:38:48,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-08-18 10:38:48,500 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:48,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:48,501 INFO L82 PathProgramCache]: Analyzing trace with hash -2123468880, now seen corresponding path program 5 times [2020-08-18 10:38:48,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:48,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638813013] [2020-08-18 10:38:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:48,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:48,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:48,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2020-08-18 10:38:48,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:38:48,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:48,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:48,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638813013] [2020-08-18 10:38:48,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:48,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-08-18 10:38:48,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591990795] [2020-08-18 10:38:48,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-08-18 10:38:48,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:48,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-08-18 10:38:48,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-08-18 10:38:48,682 INFO L87 Difference]: Start difference. First operand 73 states and 85 transitions. Second operand 13 states. [2020-08-18 10:38:49,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:49,259 INFO L93 Difference]: Finished difference Result 315 states and 420 transitions. [2020-08-18 10:38:49,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-08-18 10:38:49,260 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-08-18 10:38:49,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:49,263 INFO L225 Difference]: With dead ends: 315 [2020-08-18 10:38:49,263 INFO L226 Difference]: Without dead ends: 265 [2020-08-18 10:38:49,264 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 [2020-08-18 10:38:49,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-08-18 10:38:49,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 75. [2020-08-18 10:38:49,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-08-18 10:38:49,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 87 transitions. [2020-08-18 10:38:49,283 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 87 transitions. Word has length 49 [2020-08-18 10:38:49,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:49,284 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 87 transitions. [2020-08-18 10:38:49,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-08-18 10:38:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 87 transitions. [2020-08-18 10:38:49,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-08-18 10:38:49,285 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:49,285 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] [2020-08-18 10:38:49,285 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-08-18 10:38:49,285 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:49,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:49,286 INFO L82 PathProgramCache]: Analyzing trace with hash -980037426, now seen corresponding path program 6 times [2020-08-18 10:38:49,286 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:49,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624258701] [2020-08-18 10:38:49,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:49,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:49,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:49,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-08-18 10:38:49,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:49,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:38:49,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:49,434 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:49,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624258701] [2020-08-18 10:38:49,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:49,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-08-18 10:38:49,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863404335] [2020-08-18 10:38:49,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-08-18 10:38:49,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:49,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-08-18 10:38:49,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=112, Unknown=0, NotChecked=0, Total=182 [2020-08-18 10:38:49,436 INFO L87 Difference]: Start difference. First operand 75 states and 87 transitions. Second operand 14 states. [2020-08-18 10:38:49,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:49,992 INFO L93 Difference]: Finished difference Result 338 states and 452 transitions. [2020-08-18 10:38:49,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-08-18 10:38:49,993 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 51 [2020-08-18 10:38:49,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:49,995 INFO L225 Difference]: With dead ends: 338 [2020-08-18 10:38:49,996 INFO L226 Difference]: Without dead ends: 288 [2020-08-18 10:38:49,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=153, Unknown=0, NotChecked=0, Total=240 [2020-08-18 10:38:49,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-08-18 10:38:50,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 77. [2020-08-18 10:38:50,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-08-18 10:38:50,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2020-08-18 10:38:50,014 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 51 [2020-08-18 10:38:50,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:50,014 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2020-08-18 10:38:50,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-08-18 10:38:50,015 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2020-08-18 10:38:50,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-08-18 10:38:50,016 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:50,016 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] [2020-08-18 10:38:50,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-08-18 10:38:50,016 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:50,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:50,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1654037908, now seen corresponding path program 7 times [2020-08-18 10:38:50,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:50,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843816681] [2020-08-18 10:38:50,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:50,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:50,174 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:50,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:50,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2020-08-18 10:38:50,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:50,189 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 10:38:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:50,195 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:50,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843816681] [2020-08-18 10:38:50,196 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:50,196 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-08-18 10:38:50,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497579928] [2020-08-18 10:38:50,197 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-08-18 10:38:50,197 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:50,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-08-18 10:38:50,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2020-08-18 10:38:50,198 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand 15 states. [2020-08-18 10:38:50,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:50,953 INFO L93 Difference]: Finished difference Result 361 states and 484 transitions. [2020-08-18 10:38:50,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-08-18 10:38:50,954 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-08-18 10:38:50,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:50,957 INFO L225 Difference]: With dead ends: 361 [2020-08-18 10:38:50,957 INFO L226 Difference]: Without dead ends: 311 [2020-08-18 10:38:50,958 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 [2020-08-18 10:38:50,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2020-08-18 10:38:50,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 79. [2020-08-18 10:38:50,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-08-18 10:38:50,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 91 transitions. [2020-08-18 10:38:50,971 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 91 transitions. Word has length 53 [2020-08-18 10:38:50,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:50,974 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 91 transitions. [2020-08-18 10:38:50,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-08-18 10:38:50,974 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 91 transitions. [2020-08-18 10:38:50,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-08-18 10:38:50,975 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:50,975 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] [2020-08-18 10:38:50,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-08-18 10:38:50,975 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:50,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:50,976 INFO L82 PathProgramCache]: Analyzing trace with hash -828439414, now seen corresponding path program 8 times [2020-08-18 10:38:50,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:50,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1999339452] [2020-08-18 10:38:50,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:51,121 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:51,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:51,124 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2020-08-18 10:38:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:51,138 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:38:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:51,144 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:51,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1999339452] [2020-08-18 10:38:51,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:51,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-08-18 10:38:51,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947645723] [2020-08-18 10:38:51,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-08-18 10:38:51,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:51,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-08-18 10:38:51,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=145, Unknown=0, NotChecked=0, Total=240 [2020-08-18 10:38:51,147 INFO L87 Difference]: Start difference. First operand 79 states and 91 transitions. Second operand 16 states. [2020-08-18 10:38:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:51,920 INFO L93 Difference]: Finished difference Result 384 states and 516 transitions. [2020-08-18 10:38:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-08-18 10:38:51,920 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 55 [2020-08-18 10:38:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:51,923 INFO L225 Difference]: With dead ends: 384 [2020-08-18 10:38:51,923 INFO L226 Difference]: Without dead ends: 334 [2020-08-18 10:38:51,924 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=192, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:38:51,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-08-18 10:38:51,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 81. [2020-08-18 10:38:51,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-08-18 10:38:51,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 93 transitions. [2020-08-18 10:38:51,933 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 93 transitions. Word has length 55 [2020-08-18 10:38:51,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:51,933 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 93 transitions. [2020-08-18 10:38:51,933 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-08-18 10:38:51,933 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 93 transitions. [2020-08-18 10:38:51,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-08-18 10:38:51,934 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:51,934 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] [2020-08-18 10:38:51,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-08-18 10:38:51,935 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:51,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:51,935 INFO L82 PathProgramCache]: Analyzing trace with hash -1997236440, now seen corresponding path program 9 times [2020-08-18 10:38:51,935 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:51,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1443407861] [2020-08-18 10:38:51,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:51,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:52,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:52,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:52,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2020-08-18 10:38:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:52,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:38:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:52,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1443407861] [2020-08-18 10:38:52,127 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:52,127 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-08-18 10:38:52,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713897466] [2020-08-18 10:38:52,128 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-08-18 10:38:52,128 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:52,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-08-18 10:38:52,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=163, Unknown=0, NotChecked=0, Total=272 [2020-08-18 10:38:52,129 INFO L87 Difference]: Start difference. First operand 81 states and 93 transitions. Second operand 17 states. [2020-08-18 10:38:52,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:52,875 INFO L93 Difference]: Finished difference Result 407 states and 548 transitions. [2020-08-18 10:38:52,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-08-18 10:38:52,876 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 57 [2020-08-18 10:38:52,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:52,878 INFO L225 Difference]: With dead ends: 407 [2020-08-18 10:38:52,878 INFO L226 Difference]: Without dead ends: 357 [2020-08-18 10:38:52,879 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 [2020-08-18 10:38:52,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2020-08-18 10:38:52,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 83. [2020-08-18 10:38:52,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-08-18 10:38:52,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 95 transitions. [2020-08-18 10:38:52,888 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 95 transitions. Word has length 57 [2020-08-18 10:38:52,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:52,889 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 95 transitions. [2020-08-18 10:38:52,889 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-08-18 10:38:52,889 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 95 transitions. [2020-08-18 10:38:52,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-08-18 10:38:52,890 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:52,890 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] [2020-08-18 10:38:52,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-08-18 10:38:52,890 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:52,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:52,891 INFO L82 PathProgramCache]: Analyzing trace with hash 70253126, now seen corresponding path program 10 times [2020-08-18 10:38:52,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:52,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278121947] [2020-08-18 10:38:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:52,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:53,071 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:53,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:53,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2020-08-18 10:38:53,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:53,094 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 10:38:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:53,102 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:53,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278121947] [2020-08-18 10:38:53,103 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:53,103 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-08-18 10:38:53,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879253761] [2020-08-18 10:38:53,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-08-18 10:38:53,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:53,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-08-18 10:38:53,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=182, Unknown=0, NotChecked=0, Total=306 [2020-08-18 10:38:53,106 INFO L87 Difference]: Start difference. First operand 83 states and 95 transitions. Second operand 18 states. [2020-08-18 10:38:53,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:53,938 INFO L93 Difference]: Finished difference Result 430 states and 580 transitions. [2020-08-18 10:38:53,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-08-18 10:38:53,938 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 59 [2020-08-18 10:38:53,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:53,941 INFO L225 Difference]: With dead ends: 430 [2020-08-18 10:38:53,941 INFO L226 Difference]: Without dead ends: 380 [2020-08-18 10:38:53,942 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 [2020-08-18 10:38:53,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-08-18 10:38:53,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 85. [2020-08-18 10:38:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-08-18 10:38:53,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 97 transitions. [2020-08-18 10:38:53,952 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 97 transitions. Word has length 59 [2020-08-18 10:38:53,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:53,953 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 97 transitions. [2020-08-18 10:38:53,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-08-18 10:38:53,953 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 97 transitions. [2020-08-18 10:38:53,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-08-18 10:38:53,954 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:53,954 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] [2020-08-18 10:38:53,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-08-18 10:38:53,954 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:53,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:53,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1642131996, now seen corresponding path program 11 times [2020-08-18 10:38:53,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:53,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582645816] [2020-08-18 10:38:53,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:54,145 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:54,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:54,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2020-08-18 10:38:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:54,160 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 10:38:54,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:54,167 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:54,167 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582645816] [2020-08-18 10:38:54,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:54,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-08-18 10:38:54,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742067888] [2020-08-18 10:38:54,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-08-18 10:38:54,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:54,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-08-18 10:38:54,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=202, Unknown=0, NotChecked=0, Total=342 [2020-08-18 10:38:54,169 INFO L87 Difference]: Start difference. First operand 85 states and 97 transitions. Second operand 19 states. [2020-08-18 10:38:55,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:55,087 INFO L93 Difference]: Finished difference Result 453 states and 612 transitions. [2020-08-18 10:38:55,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-08-18 10:38:55,088 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 61 [2020-08-18 10:38:55,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:55,091 INFO L225 Difference]: With dead ends: 453 [2020-08-18 10:38:55,091 INFO L226 Difference]: Without dead ends: 403 [2020-08-18 10:38:55,092 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=162, Invalid=258, Unknown=0, NotChecked=0, Total=420 [2020-08-18 10:38:55,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-08-18 10:38:55,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 87. [2020-08-18 10:38:55,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-08-18 10:38:55,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 99 transitions. [2020-08-18 10:38:55,104 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 99 transitions. Word has length 61 [2020-08-18 10:38:55,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:55,106 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 99 transitions. [2020-08-18 10:38:55,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-08-18 10:38:55,106 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 99 transitions. [2020-08-18 10:38:55,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-08-18 10:38:55,107 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:55,107 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] [2020-08-18 10:38:55,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-08-18 10:38:55,107 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:55,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:55,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2023207426, now seen corresponding path program 12 times [2020-08-18 10:38:55,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:55,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216519648] [2020-08-18 10:38:55,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:55,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:55,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:55,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2020-08-18 10:38:55,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:55,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 10:38:55,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:55,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216519648] [2020-08-18 10:38:55,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:55,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-08-18 10:38:55,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533595381] [2020-08-18 10:38:55,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-08-18 10:38:55,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:55,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-08-18 10:38:55,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=223, Unknown=0, NotChecked=0, Total=380 [2020-08-18 10:38:55,445 INFO L87 Difference]: Start difference. First operand 87 states and 99 transitions. Second operand 20 states. [2020-08-18 10:38:56,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:56,672 INFO L93 Difference]: Finished difference Result 476 states and 644 transitions. [2020-08-18 10:38:56,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-08-18 10:38:56,673 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 63 [2020-08-18 10:38:56,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:56,677 INFO L225 Difference]: With dead ends: 476 [2020-08-18 10:38:56,677 INFO L226 Difference]: Without dead ends: 426 [2020-08-18 10:38:56,679 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 [2020-08-18 10:38:56,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2020-08-18 10:38:56,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 89. [2020-08-18 10:38:56,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-08-18 10:38:56,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2020-08-18 10:38:56,694 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 63 [2020-08-18 10:38:56,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:56,695 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2020-08-18 10:38:56,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-08-18 10:38:56,695 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2020-08-18 10:38:56,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-08-18 10:38:56,696 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:56,697 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] [2020-08-18 10:38:56,697 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-08-18 10:38:56,697 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:56,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:56,698 INFO L82 PathProgramCache]: Analyzing trace with hash -1753758048, now seen corresponding path program 13 times [2020-08-18 10:38:56,698 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:56,698 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345611380] [2020-08-18 10:38:56,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:56,964 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:56,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:56,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2020-08-18 10:38:56,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:56,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 10:38:56,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:56,995 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:56,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345611380] [2020-08-18 10:38:56,995 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:56,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-08-18 10:38:56,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292013695] [2020-08-18 10:38:56,998 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-08-18 10:38:56,999 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:56,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-08-18 10:38:57,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=175, Invalid=245, Unknown=0, NotChecked=0, Total=420 [2020-08-18 10:38:57,006 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand 21 states. [2020-08-18 10:38:58,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:58,160 INFO L93 Difference]: Finished difference Result 499 states and 676 transitions. [2020-08-18 10:38:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-08-18 10:38:58,160 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 65 [2020-08-18 10:38:58,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:58,163 INFO L225 Difference]: With dead ends: 499 [2020-08-18 10:38:58,163 INFO L226 Difference]: Without dead ends: 449 [2020-08-18 10:38:58,164 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 [2020-08-18 10:38:58,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 449 states. [2020-08-18 10:38:58,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 449 to 91. [2020-08-18 10:38:58,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-08-18 10:38:58,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 103 transitions. [2020-08-18 10:38:58,173 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 103 transitions. Word has length 65 [2020-08-18 10:38:58,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:58,174 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 103 transitions. [2020-08-18 10:38:58,174 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-08-18 10:38:58,174 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 103 transitions. [2020-08-18 10:38:58,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-08-18 10:38:58,175 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:58,175 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] [2020-08-18 10:38:58,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-08-18 10:38:58,175 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:58,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:58,176 INFO L82 PathProgramCache]: Analyzing trace with hash 2124753854, now seen corresponding path program 14 times [2020-08-18 10:38:58,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:58,176 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [917158483] [2020-08-18 10:38:58,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:58,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:58,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:58,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:58,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2020-08-18 10:38:58,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:58,427 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 10:38:58,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:58,436 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:58,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [917158483] [2020-08-18 10:38:58,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:58,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-08-18 10:38:58,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99057001] [2020-08-18 10:38:58,439 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-08-18 10:38:58,439 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:58,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-08-18 10:38:58,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=268, Unknown=0, NotChecked=0, Total=462 [2020-08-18 10:38:58,440 INFO L87 Difference]: Start difference. First operand 91 states and 103 transitions. Second operand 22 states. [2020-08-18 10:38:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:38:59,627 INFO L93 Difference]: Finished difference Result 522 states and 708 transitions. [2020-08-18 10:38:59,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-08-18 10:38:59,628 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 67 [2020-08-18 10:38:59,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:38:59,631 INFO L225 Difference]: With dead ends: 522 [2020-08-18 10:38:59,631 INFO L226 Difference]: Without dead ends: 472 [2020-08-18 10:38:59,632 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 [2020-08-18 10:38:59,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-08-18 10:38:59,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 93. [2020-08-18 10:38:59,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-08-18 10:38:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 105 transitions. [2020-08-18 10:38:59,643 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 105 transitions. Word has length 67 [2020-08-18 10:38:59,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:38:59,644 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 105 transitions. [2020-08-18 10:38:59,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-08-18 10:38:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 105 transitions. [2020-08-18 10:38:59,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-08-18 10:38:59,645 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:38:59,645 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] [2020-08-18 10:38:59,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-08-18 10:38:59,645 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:38:59,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:38:59,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1343078748, now seen corresponding path program 15 times [2020-08-18 10:38:59,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:38:59,646 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574485161] [2020-08-18 10:38:59,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:38:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:59,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:38:59,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:59,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2020-08-18 10:38:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:59,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 10:38:59,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:38:59,957 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:38:59,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574485161] [2020-08-18 10:38:59,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:38:59,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-08-18 10:38:59,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048001080] [2020-08-18 10:38:59,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-08-18 10:38:59,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:38:59,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-08-18 10:38:59,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=214, Invalid=292, Unknown=0, NotChecked=0, Total=506 [2020-08-18 10:38:59,959 INFO L87 Difference]: Start difference. First operand 93 states and 105 transitions. Second operand 23 states. [2020-08-18 10:39:01,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:01,263 INFO L93 Difference]: Finished difference Result 545 states and 740 transitions. [2020-08-18 10:39:01,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-08-18 10:39:01,264 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 69 [2020-08-18 10:39:01,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:01,267 INFO L225 Difference]: With dead ends: 545 [2020-08-18 10:39:01,268 INFO L226 Difference]: Without dead ends: 495 [2020-08-18 10:39:01,269 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 [2020-08-18 10:39:01,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2020-08-18 10:39:01,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 95. [2020-08-18 10:39:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-08-18 10:39:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 107 transitions. [2020-08-18 10:39:01,284 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 107 transitions. Word has length 69 [2020-08-18 10:39:01,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:01,285 INFO L479 AbstractCegarLoop]: Abstraction has 95 states and 107 transitions. [2020-08-18 10:39:01,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-08-18 10:39:01,285 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 107 transitions. [2020-08-18 10:39:01,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-08-18 10:39:01,286 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:01,286 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] [2020-08-18 10:39:01,286 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-08-18 10:39:01,286 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:01,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:01,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1772578682, now seen corresponding path program 16 times [2020-08-18 10:39:01,287 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:01,287 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339798196] [2020-08-18 10:39:01,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:01,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:01,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:01,591 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2020-08-18 10:39:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:01,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 10:39:01,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:01,619 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:01,619 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339798196] [2020-08-18 10:39:01,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:01,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-08-18 10:39:01,620 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631637553] [2020-08-18 10:39:01,620 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-08-18 10:39:01,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:01,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-08-18 10:39:01,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=317, Unknown=0, NotChecked=0, Total=552 [2020-08-18 10:39:01,621 INFO L87 Difference]: Start difference. First operand 95 states and 107 transitions. Second operand 24 states. [2020-08-18 10:39:02,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:02,768 INFO L93 Difference]: Finished difference Result 568 states and 772 transitions. [2020-08-18 10:39:02,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-08-18 10:39:02,768 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 71 [2020-08-18 10:39:02,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:02,771 INFO L225 Difference]: With dead ends: 568 [2020-08-18 10:39:02,772 INFO L226 Difference]: Without dead ends: 518 [2020-08-18 10:39:02,773 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=262, Invalid=388, Unknown=0, NotChecked=0, Total=650 [2020-08-18 10:39:02,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2020-08-18 10:39:02,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 97. [2020-08-18 10:39:02,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-08-18 10:39:02,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 109 transitions. [2020-08-18 10:39:02,785 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 109 transitions. Word has length 71 [2020-08-18 10:39:02,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:02,785 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 109 transitions. [2020-08-18 10:39:02,785 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-08-18 10:39:02,786 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 109 transitions. [2020-08-18 10:39:02,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-08-18 10:39:02,786 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:02,787 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] [2020-08-18 10:39:02,787 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-08-18 10:39:02,787 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:02,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:02,787 INFO L82 PathProgramCache]: Analyzing trace with hash -2089812456, now seen corresponding path program 17 times [2020-08-18 10:39:02,787 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:02,788 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509621672] [2020-08-18 10:39:02,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:02,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:03,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:03,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:03,130 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-08-18 10:39:03,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:03,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 10:39:03,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:03,165 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:03,166 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509621672] [2020-08-18 10:39:03,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:03,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-08-18 10:39:03,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950247267] [2020-08-18 10:39:03,167 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-08-18 10:39:03,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:03,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-08-18 10:39:03,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=343, Unknown=0, NotChecked=0, Total=600 [2020-08-18 10:39:03,169 INFO L87 Difference]: Start difference. First operand 97 states and 109 transitions. Second operand 25 states. [2020-08-18 10:39:04,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:04,390 INFO L93 Difference]: Finished difference Result 591 states and 804 transitions. [2020-08-18 10:39:04,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-08-18 10:39:04,393 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 73 [2020-08-18 10:39:04,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:04,396 INFO L225 Difference]: With dead ends: 591 [2020-08-18 10:39:04,396 INFO L226 Difference]: Without dead ends: 541 [2020-08-18 10:39:04,401 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 [2020-08-18 10:39:04,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-08-18 10:39:04,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 99. [2020-08-18 10:39:04,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-08-18 10:39:04,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 111 transitions. [2020-08-18 10:39:04,412 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 111 transitions. Word has length 73 [2020-08-18 10:39:04,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:04,412 INFO L479 AbstractCegarLoop]: Abstraction has 99 states and 111 transitions. [2020-08-18 10:39:04,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-08-18 10:39:04,412 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 111 transitions. [2020-08-18 10:39:04,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-08-18 10:39:04,413 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:04,413 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] [2020-08-18 10:39:04,414 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-08-18 10:39:04,414 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:04,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:04,414 INFO L82 PathProgramCache]: Analyzing trace with hash 1299014966, now seen corresponding path program 18 times [2020-08-18 10:39:04,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:04,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058760865] [2020-08-18 10:39:04,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:04,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:04,765 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-08-18 10:39:04,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:04,783 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 10:39:04,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:04,791 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:04,796 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058760865] [2020-08-18 10:39:04,796 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:04,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-08-18 10:39:04,797 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683756634] [2020-08-18 10:39:04,797 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-08-18 10:39:04,799 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:04,799 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-08-18 10:39:04,799 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=370, Unknown=0, NotChecked=0, Total=650 [2020-08-18 10:39:04,800 INFO L87 Difference]: Start difference. First operand 99 states and 111 transitions. Second operand 26 states. [2020-08-18 10:39:06,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:06,084 INFO L93 Difference]: Finished difference Result 614 states and 836 transitions. [2020-08-18 10:39:06,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-08-18 10:39:06,084 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 75 [2020-08-18 10:39:06,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:06,088 INFO L225 Difference]: With dead ends: 614 [2020-08-18 10:39:06,088 INFO L226 Difference]: Without dead ends: 564 [2020-08-18 10:39:06,089 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 [2020-08-18 10:39:06,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2020-08-18 10:39:06,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 101. [2020-08-18 10:39:06,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-08-18 10:39:06,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2020-08-18 10:39:06,099 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 75 [2020-08-18 10:39:06,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:06,100 INFO L479 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2020-08-18 10:39:06,100 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-08-18 10:39:06,100 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2020-08-18 10:39:06,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-08-18 10:39:06,101 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:06,101 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] [2020-08-18 10:39:06,101 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-08-18 10:39:06,101 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:06,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:06,102 INFO L82 PathProgramCache]: Analyzing trace with hash -1918010156, now seen corresponding path program 19 times [2020-08-18 10:39:06,102 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:06,102 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1874531666] [2020-08-18 10:39:06,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:06,539 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:06,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2020-08-18 10:39:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:06,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 10:39:06,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:06,569 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:06,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1874531666] [2020-08-18 10:39:06,570 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:06,570 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-08-18 10:39:06,570 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623787139] [2020-08-18 10:39:06,571 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-08-18 10:39:06,571 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:06,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-08-18 10:39:06,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=398, Unknown=0, NotChecked=0, Total=702 [2020-08-18 10:39:06,572 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand 27 states. [2020-08-18 10:39:08,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:08,196 INFO L93 Difference]: Finished difference Result 637 states and 868 transitions. [2020-08-18 10:39:08,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-08-18 10:39:08,196 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 77 [2020-08-18 10:39:08,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:08,199 INFO L225 Difference]: With dead ends: 637 [2020-08-18 10:39:08,200 INFO L226 Difference]: Without dead ends: 587 [2020-08-18 10:39:08,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=478, Unknown=0, NotChecked=0, Total=812 [2020-08-18 10:39:08,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2020-08-18 10:39:08,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 103. [2020-08-18 10:39:08,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-08-18 10:39:08,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 115 transitions. [2020-08-18 10:39:08,211 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 115 transitions. Word has length 77 [2020-08-18 10:39:08,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:08,212 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 115 transitions. [2020-08-18 10:39:08,212 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-08-18 10:39:08,212 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 115 transitions. [2020-08-18 10:39:08,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-08-18 10:39:08,213 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:08,213 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] [2020-08-18 10:39:08,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-08-18 10:39:08,213 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:08,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:08,214 INFO L82 PathProgramCache]: Analyzing trace with hash -1102699278, now seen corresponding path program 20 times [2020-08-18 10:39:08,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:08,214 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [379715831] [2020-08-18 10:39:08,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:08,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:08,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:08,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2020-08-18 10:39:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:08,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 10:39:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:08,673 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:08,674 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [379715831] [2020-08-18 10:39:08,674 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:08,674 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-08-18 10:39:08,675 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810028466] [2020-08-18 10:39:08,675 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-08-18 10:39:08,676 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:08,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-08-18 10:39:08,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=427, Unknown=0, NotChecked=0, Total=756 [2020-08-18 10:39:08,677 INFO L87 Difference]: Start difference. First operand 103 states and 115 transitions. Second operand 28 states. [2020-08-18 10:39:10,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:10,495 INFO L93 Difference]: Finished difference Result 660 states and 900 transitions. [2020-08-18 10:39:10,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-08-18 10:39:10,496 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 79 [2020-08-18 10:39:10,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:10,499 INFO L225 Difference]: With dead ends: 660 [2020-08-18 10:39:10,499 INFO L226 Difference]: Without dead ends: 610 [2020-08-18 10:39:10,500 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=510, Unknown=0, NotChecked=0, Total=870 [2020-08-18 10:39:10,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2020-08-18 10:39:10,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 105. [2020-08-18 10:39:10,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-08-18 10:39:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 117 transitions. [2020-08-18 10:39:10,512 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 117 transitions. Word has length 79 [2020-08-18 10:39:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:10,512 INFO L479 AbstractCegarLoop]: Abstraction has 105 states and 117 transitions. [2020-08-18 10:39:10,512 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-08-18 10:39:10,512 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 117 transitions. [2020-08-18 10:39:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-08-18 10:39:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:10,513 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] [2020-08-18 10:39:10,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-08-18 10:39:10,514 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:10,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:10,514 INFO L82 PathProgramCache]: Analyzing trace with hash 727006608, now seen corresponding path program 21 times [2020-08-18 10:39:10,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:10,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [343355579] [2020-08-18 10:39:10,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:10,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:10,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:10,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:10,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2020-08-18 10:39:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:10,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 10:39:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:10,976 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:10,976 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [343355579] [2020-08-18 10:39:10,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:10,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-08-18 10:39:10,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964604508] [2020-08-18 10:39:10,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-08-18 10:39:10,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:10,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-08-18 10:39:10,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=355, Invalid=457, Unknown=0, NotChecked=0, Total=812 [2020-08-18 10:39:10,978 INFO L87 Difference]: Start difference. First operand 105 states and 117 transitions. Second operand 29 states. [2020-08-18 10:39:12,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:12,770 INFO L93 Difference]: Finished difference Result 683 states and 932 transitions. [2020-08-18 10:39:12,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-08-18 10:39:12,774 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 81 [2020-08-18 10:39:12,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:12,778 INFO L225 Difference]: With dead ends: 683 [2020-08-18 10:39:12,778 INFO L226 Difference]: Without dead ends: 633 [2020-08-18 10:39:12,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=387, Invalid=543, Unknown=0, NotChecked=0, Total=930 [2020-08-18 10:39:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-08-18 10:39:12,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 107. [2020-08-18 10:39:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-08-18 10:39:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 119 transitions. [2020-08-18 10:39:12,791 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 119 transitions. Word has length 81 [2020-08-18 10:39:12,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:12,792 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 119 transitions. [2020-08-18 10:39:12,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-08-18 10:39:12,792 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 119 transitions. [2020-08-18 10:39:12,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-08-18 10:39:12,793 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:12,793 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] [2020-08-18 10:39:12,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-08-18 10:39:12,793 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:12,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:12,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1862228306, now seen corresponding path program 22 times [2020-08-18 10:39:12,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:12,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560205439] [2020-08-18 10:39:12,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:12,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:13,224 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:13,227 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-08-18 10:39:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:13,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 10:39:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:13,257 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:13,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560205439] [2020-08-18 10:39:13,257 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:13,257 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-08-18 10:39:13,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610263454] [2020-08-18 10:39:13,258 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-08-18 10:39:13,258 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:13,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-08-18 10:39:13,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=382, Invalid=488, Unknown=0, NotChecked=0, Total=870 [2020-08-18 10:39:13,259 INFO L87 Difference]: Start difference. First operand 107 states and 119 transitions. Second operand 30 states. [2020-08-18 10:39:15,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:15,271 INFO L93 Difference]: Finished difference Result 706 states and 964 transitions. [2020-08-18 10:39:15,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-08-18 10:39:15,272 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 83 [2020-08-18 10:39:15,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:15,275 INFO L225 Difference]: With dead ends: 706 [2020-08-18 10:39:15,275 INFO L226 Difference]: Without dead ends: 656 [2020-08-18 10:39:15,276 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 [2020-08-18 10:39:15,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2020-08-18 10:39:15,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 109. [2020-08-18 10:39:15,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-08-18 10:39:15,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 121 transitions. [2020-08-18 10:39:15,287 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 121 transitions. Word has length 83 [2020-08-18 10:39:15,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:15,288 INFO L479 AbstractCegarLoop]: Abstraction has 109 states and 121 transitions. [2020-08-18 10:39:15,288 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-08-18 10:39:15,288 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 121 transitions. [2020-08-18 10:39:15,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-08-18 10:39:15,289 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:15,289 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] [2020-08-18 10:39:15,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-08-18 10:39:15,289 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:15,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:15,290 INFO L82 PathProgramCache]: Analyzing trace with hash 964051020, now seen corresponding path program 23 times [2020-08-18 10:39:15,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:15,290 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890273940] [2020-08-18 10:39:15,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:15,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:15,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:15,785 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2020-08-18 10:39:15,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:15,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 10:39:15,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:15,814 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:15,815 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890273940] [2020-08-18 10:39:15,815 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:15,815 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-08-18 10:39:15,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664452411] [2020-08-18 10:39:15,816 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-08-18 10:39:15,816 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:15,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-08-18 10:39:15,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=410, Invalid=520, Unknown=0, NotChecked=0, Total=930 [2020-08-18 10:39:15,817 INFO L87 Difference]: Start difference. First operand 109 states and 121 transitions. Second operand 31 states. [2020-08-18 10:39:17,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:17,930 INFO L93 Difference]: Finished difference Result 729 states and 996 transitions. [2020-08-18 10:39:17,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-08-18 10:39:17,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 85 [2020-08-18 10:39:17,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:17,934 INFO L225 Difference]: With dead ends: 729 [2020-08-18 10:39:17,934 INFO L226 Difference]: Without dead ends: 679 [2020-08-18 10:39:17,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=444, Invalid=612, Unknown=0, NotChecked=0, Total=1056 [2020-08-18 10:39:17,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2020-08-18 10:39:17,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 111. [2020-08-18 10:39:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-08-18 10:39:17,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 123 transitions. [2020-08-18 10:39:17,945 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 123 transitions. Word has length 85 [2020-08-18 10:39:17,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:17,945 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 123 transitions. [2020-08-18 10:39:17,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-08-18 10:39:17,946 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 123 transitions. [2020-08-18 10:39:17,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-08-18 10:39:17,946 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:17,947 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] [2020-08-18 10:39:17,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-08-18 10:39:17,947 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:17,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:17,947 INFO L82 PathProgramCache]: Analyzing trace with hash -1695815062, now seen corresponding path program 24 times [2020-08-18 10:39:17,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:17,948 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73687488] [2020-08-18 10:39:17,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:17,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:18,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:18,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:18,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2020-08-18 10:39:18,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:18,456 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2020-08-18 10:39:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-08-18 10:39:18,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73687488] [2020-08-18 10:39:18,466 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:18,466 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-08-18 10:39:18,466 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45217587] [2020-08-18 10:39:18,466 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-08-18 10:39:18,467 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:18,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-08-18 10:39:18,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=439, Invalid=553, Unknown=0, NotChecked=0, Total=992 [2020-08-18 10:39:18,468 INFO L87 Difference]: Start difference. First operand 111 states and 123 transitions. Second operand 32 states. [2020-08-18 10:39:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:20,277 INFO L93 Difference]: Finished difference Result 752 states and 1028 transitions. [2020-08-18 10:39:20,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-08-18 10:39:20,277 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 87 [2020-08-18 10:39:20,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:20,281 INFO L225 Difference]: With dead ends: 752 [2020-08-18 10:39:20,281 INFO L226 Difference]: Without dead ends: 702 [2020-08-18 10:39:20,282 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 [2020-08-18 10:39:20,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2020-08-18 10:39:20,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 113. [2020-08-18 10:39:20,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-08-18 10:39:20,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2020-08-18 10:39:20,294 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 87 [2020-08-18 10:39:20,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:20,294 INFO L479 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2020-08-18 10:39:20,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-08-18 10:39:20,294 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2020-08-18 10:39:20,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-08-18 10:39:20,295 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:20,296 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] [2020-08-18 10:39:20,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-08-18 10:39:20,296 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:20,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:20,296 INFO L82 PathProgramCache]: Analyzing trace with hash 1973388552, now seen corresponding path program 25 times [2020-08-18 10:39:20,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:20,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319144090] [2020-08-18 10:39:20,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:20,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,345 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:20,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,348 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-08-18 10:39:20,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,355 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-08-18 10:39:20,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 10:39:20,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319144090] [2020-08-18 10:39:20,362 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:39:20,362 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-08-18 10:39:20,363 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211665814] [2020-08-18 10:39:20,363 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-08-18 10:39:20,363 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-08-18 10:39:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-08-18 10:39:20,364 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand 5 states. [2020-08-18 10:39:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:20,501 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2020-08-18 10:39:20,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-08-18 10:39:20,502 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 89 [2020-08-18 10:39:20,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:20,503 INFO L225 Difference]: With dead ends: 177 [2020-08-18 10:39:20,503 INFO L226 Difference]: Without dead ends: 132 [2020-08-18 10:39:20,504 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 [2020-08-18 10:39:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-08-18 10:39:20,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 114. [2020-08-18 10:39:20,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-08-18 10:39:20,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 126 transitions. [2020-08-18 10:39:20,510 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 126 transitions. Word has length 89 [2020-08-18 10:39:20,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:20,510 INFO L479 AbstractCegarLoop]: Abstraction has 114 states and 126 transitions. [2020-08-18 10:39:20,510 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-08-18 10:39:20,511 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 126 transitions. [2020-08-18 10:39:20,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-08-18 10:39:20,512 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:20,512 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] [2020-08-18 10:39:20,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-08-18 10:39:20,512 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:20,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:20,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1905794714, now seen corresponding path program 1 times [2020-08-18 10:39:20,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:20,513 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081675651] [2020-08-18 10:39:20,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:20,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,565 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-08-18 10:39:20,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2020-08-18 10:39:20,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 784 trivial. 0 not checked. [2020-08-18 10:39:20,580 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081675651] [2020-08-18 10:39:20,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-08-18 10:39:20,581 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-08-18 10:39:20,581 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074733492] [2020-08-18 10:39:20,581 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 10:39:20,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:20,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 10:39:20,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:39:20,582 INFO L87 Difference]: Start difference. First operand 114 states and 126 transitions. Second operand 6 states. [2020-08-18 10:39:20,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:20,739 INFO L93 Difference]: Finished difference Result 200 states and 238 transitions. [2020-08-18 10:39:20,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 10:39:20,740 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 91 [2020-08-18 10:39:20,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:20,741 INFO L225 Difference]: With dead ends: 200 [2020-08-18 10:39:20,742 INFO L226 Difference]: Without dead ends: 155 [2020-08-18 10:39:20,742 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 [2020-08-18 10:39:20,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-08-18 10:39:20,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 131. [2020-08-18 10:39:20,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-08-18 10:39:20,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 149 transitions. [2020-08-18 10:39:20,750 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 149 transitions. Word has length 91 [2020-08-18 10:39:20,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:20,751 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 149 transitions. [2020-08-18 10:39:20,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 10:39:20,751 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 149 transitions. [2020-08-18 10:39:20,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:39:20,752 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:20,752 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] [2020-08-18 10:39:20,752 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-08-18 10:39:20,753 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:20,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:20,753 INFO L82 PathProgramCache]: Analyzing trace with hash -1769300412, now seen corresponding path program 2 times [2020-08-18 10:39:20,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:20,753 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1265398183] [2020-08-18 10:39:20,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:20,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 10:39:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 10:39:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:20,851 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 10:39:20,851 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1265398183] [2020-08-18 10:39:20,851 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:39:20,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-08-18 10:39:20,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522642671] [2020-08-18 10:39:20,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-08-18 10:39:20,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:20,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-08-18 10:39:20,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-08-18 10:39:20,861 INFO L87 Difference]: Start difference. First operand 131 states and 149 transitions. Second operand 6 states. [2020-08-18 10:39:20,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:20,992 INFO L93 Difference]: Finished difference Result 187 states and 222 transitions. [2020-08-18 10:39:20,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-08-18 10:39:20,993 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 93 [2020-08-18 10:39:20,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:20,994 INFO L225 Difference]: With dead ends: 187 [2020-08-18 10:39:20,994 INFO L226 Difference]: Without dead ends: 139 [2020-08-18 10:39:20,994 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 [2020-08-18 10:39:20,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-08-18 10:39:21,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-08-18 10:39:21,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-08-18 10:39:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 157 transitions. [2020-08-18 10:39:21,004 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 157 transitions. Word has length 93 [2020-08-18 10:39:21,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:21,004 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 157 transitions. [2020-08-18 10:39:21,004 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-08-18 10:39:21,004 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 157 transitions. [2020-08-18 10:39:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-08-18 10:39:21,005 INFO L414 BasicCegarLoop]: Found error trace [2020-08-18 10:39:21,005 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] [2020-08-18 10:39:21,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-08-18 10:39:21,006 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-08-18 10:39:21,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-08-18 10:39:21,006 INFO L82 PathProgramCache]: Analyzing trace with hash -351711109, now seen corresponding path program 1 times [2020-08-18 10:39:21,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-08-18 10:39:21,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717900302] [2020-08-18 10:39:21,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-08-18 10:39:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:21,081 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-08-18 10:39:21,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2020-08-18 10:39:21,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:21,108 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2020-08-18 10:39:21,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-08-18 10:39:21,119 INFO L134 CoverageAnalysis]: Checked inductivity of 788 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 788 trivial. 0 not checked. [2020-08-18 10:39:21,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717900302] [2020-08-18 10:39:21,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-08-18 10:39:21,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-08-18 10:39:21,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017380693] [2020-08-18 10:39:21,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-08-18 10:39:21,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-08-18 10:39:21,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-08-18 10:39:21,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-08-18 10:39:21,121 INFO L87 Difference]: Start difference. First operand 137 states and 157 transitions. Second operand 7 states. [2020-08-18 10:39:21,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-08-18 10:39:21,252 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2020-08-18 10:39:21,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-08-18 10:39:21,254 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 93 [2020-08-18 10:39:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-08-18 10:39:21,255 INFO L225 Difference]: With dead ends: 157 [2020-08-18 10:39:21,255 INFO L226 Difference]: Without dead ends: 0 [2020-08-18 10:39:21,256 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 [2020-08-18 10:39:21,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-08-18 10:39:21,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-08-18 10:39:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-08-18 10:39:21,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-08-18 10:39:21,257 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 93 [2020-08-18 10:39:21,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-08-18 10:39:21,258 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-08-18 10:39:21,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-08-18 10:39:21,258 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-08-18 10:39:21,258 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-08-18 10:39:21,258 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-08-18 10:39:21,260 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-08-18 10:39:21,543 INFO L271 CegarLoopResult]: At program point elem_existsENTRY(lines 9 15) the Hoare annotation is: true [2020-08-18 10:39:21,543 INFO L268 CegarLoopResult]: For program point elem_existsEXIT(lines 9 15) no Hoare annotation was computed. [2020-08-18 10:39:21,543 INFO L268 CegarLoopResult]: For program point L12(line 12) no Hoare annotation was computed. [2020-08-18 10:39:21,543 INFO L268 CegarLoopResult]: For program point L11-2(lines 11 13) no Hoare annotation was computed. [2020-08-18 10:39:21,543 INFO L268 CegarLoopResult]: For program point elem_existsFINAL(lines 9 15) no Hoare annotation was computed. [2020-08-18 10:39:21,543 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|)) [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point L11-4(lines 11 13) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point ULTIMATE.initFINAL(line -1) no Hoare annotation was computed. [2020-08-18 10:39:21,544 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|)) [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L271 CegarLoopResult]: At program point insertENTRY(lines 5 8) the Hoare annotation is: true [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point insertFINAL(lines 5 8) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point insertEXIT(lines 5 8) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-08-18 10:39:21,544 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-08-18 10:39:21,544 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 16 56) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L264 CegarLoopResult]: At program point L52(line 52) the Hoare annotation is: false [2020-08-18 10:39:21,545 INFO L268 CegarLoopResult]: For program point L52-1(line 52) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L268 CegarLoopResult]: For program point L44-2(lines 44 48) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L264 CegarLoopResult]: At program point L44-3(lines 44 48) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,545 INFO L268 CegarLoopResult]: For program point L36-2(lines 36 39) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L264 CegarLoopResult]: At program point L36-3(lines 36 39) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,545 INFO L268 CegarLoopResult]: For program point L36-4(lines 36 39) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L268 CegarLoopResult]: For program point L28-2(lines 28 32) no Hoare annotation was computed. [2020-08-18 10:39:21,545 INFO L264 CegarLoopResult]: At program point L28-3(lines 28 32) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,546 INFO L268 CegarLoopResult]: For program point L28-4(lines 28 32) no Hoare annotation was computed. [2020-08-18 10:39:21,546 INFO L268 CegarLoopResult]: For program point L45-2(lines 45 47) no Hoare annotation was computed. [2020-08-18 10:39:21,546 INFO L264 CegarLoopResult]: At program point L45-3(lines 45 47) the Hoare annotation is: false [2020-08-18 10:39:21,546 INFO L268 CegarLoopResult]: For program point L29-2(lines 29 31) no Hoare annotation was computed. [2020-08-18 10:39:21,546 INFO L264 CegarLoopResult]: At program point L29-3(lines 29 31) the Hoare annotation is: false [2020-08-18 10:39:21,546 INFO L264 CegarLoopResult]: At program point L46(line 46) the Hoare annotation is: false [2020-08-18 10:39:21,546 INFO L268 CegarLoopResult]: For program point L46-1(line 46) no Hoare annotation was computed. [2020-08-18 10:39:21,547 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 16 56) no Hoare annotation was computed. [2020-08-18 10:39:21,547 INFO L264 CegarLoopResult]: At program point L30(line 30) the Hoare annotation is: false [2020-08-18 10:39:21,547 INFO L264 CegarLoopResult]: At program point mainENTRY(lines 16 56) the Hoare annotation is: (and (= |#memory_int| |old(#memory_int)|) (= |old(#valid)| |#valid|)) [2020-08-18 10:39:21,547 INFO L268 CegarLoopResult]: For program point L30-1(line 30) no Hoare annotation was computed. [2020-08-18 10:39:21,547 INFO L268 CegarLoopResult]: For program point L22-2(lines 22 25) no Hoare annotation was computed. [2020-08-18 10:39:21,547 INFO L264 CegarLoopResult]: At program point L22-3(lines 22 25) the Hoare annotation is: (= main_~n~0 0) [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L22-4(lines 22 25) no Hoare annotation was computed. [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L40-2(lines 40 49) no Hoare annotation was computed. [2020-08-18 10:39:21,548 INFO L264 CegarLoopResult]: At program point L40-3(lines 40 49) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L40-4(lines 40 49) no Hoare annotation was computed. [2020-08-18 10:39:21,548 INFO L264 CegarLoopResult]: At program point L41(line 41) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L41-1(line 41) no Hoare annotation was computed. [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L41-2(lines 41 43) no Hoare annotation was computed. [2020-08-18 10:39:21,548 INFO L268 CegarLoopResult]: For program point L41-4(lines 41 43) no Hoare annotation was computed. [2020-08-18 10:39:21,549 INFO L268 CegarLoopResult]: For program point L50-2(lines 50 54) no Hoare annotation was computed. [2020-08-18 10:39:21,549 INFO L264 CegarLoopResult]: At program point L50-3(lines 50 54) the Hoare annotation is: (and (= main_~x~0 0) (= main_~n~0 0)) [2020-08-18 10:39:21,549 INFO L268 CegarLoopResult]: For program point L50-4(lines 50 54) no Hoare annotation was computed. [2020-08-18 10:39:21,549 INFO L264 CegarLoopResult]: At program point L42(line 42) the Hoare annotation is: false [2020-08-18 10:39:21,549 INFO L268 CegarLoopResult]: For program point L42-1(line 42) no Hoare annotation was computed. [2020-08-18 10:39:21,549 INFO L268 CegarLoopResult]: For program point L51-2(lines 51 53) no Hoare annotation was computed. [2020-08-18 10:39:21,549 INFO L264 CegarLoopResult]: At program point L51-3(lines 51 53) the Hoare annotation is: false [2020-08-18 10:39:21,550 INFO L268 CegarLoopResult]: For program point L2-1(line 2) no Hoare annotation was computed. [2020-08-18 10:39:21,550 INFO L268 CegarLoopResult]: For program point L2-3(line 2) no Hoare annotation was computed. [2020-08-18 10:39:21,550 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(line 2) the Hoare annotation is: true [2020-08-18 10:39:21,550 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(line 2) no Hoare annotation was computed. [2020-08-18 10:39:21,550 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 2) no Hoare annotation was computed. [2020-08-18 10:39:21,550 INFO L268 CegarLoopResult]: For program point L2(line 2) no Hoare annotation was computed. [2020-08-18 10:39:21,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.08 10:39:21 BoogieIcfgContainer [2020-08-18 10:39:21,573 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-08-18 10:39:21,575 INFO L168 Benchmark]: Toolchain (without parser) took 38808.58 ms. Allocated memory was 140.5 MB in the beginning and 499.6 MB in the end (delta: 359.1 MB). Free memory was 103.7 MB in the beginning and 346.9 MB in the end (delta: -243.3 MB). Peak memory consumption was 115.9 MB. Max. memory is 7.1 GB. [2020-08-18 10:39:21,575 INFO L168 Benchmark]: CDTParser took 0.17 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. [2020-08-18 10:39:21,576 INFO L168 Benchmark]: CACSL2BoogieTranslator took 386.97 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.5 MB in the beginning and 182.8 MB in the end (delta: -79.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. [2020-08-18 10:39:21,576 INFO L168 Benchmark]: Boogie Preprocessor took 46.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. [2020-08-18 10:39:21,577 INFO L168 Benchmark]: RCFGBuilder took 517.39 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 155.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. [2020-08-18 10:39:21,577 INFO L168 Benchmark]: TraceAbstraction took 37853.15 ms. Allocated memory was 203.9 MB in the beginning and 499.6 MB in the end (delta: 295.7 MB). Free memory was 155.9 MB in the beginning and 346.9 MB in the end (delta: -191.0 MB). Peak memory consumption was 104.7 MB. Max. memory is 7.1 GB. [2020-08-18 10:39:21,580 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 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 386.97 ms. Allocated memory was 140.5 MB in the beginning and 203.9 MB in the end (delta: 63.4 MB). Free memory was 103.5 MB in the beginning and 182.8 MB in the end (delta: -79.3 MB). Peak memory consumption was 23.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 46.00 ms. Allocated memory is still 203.9 MB. Free memory was 182.8 MB in the beginning and 180.4 MB in the end (delta: 2.3 MB). Peak memory consumption was 2.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 517.39 ms. Allocated memory is still 203.9 MB. Free memory was 180.4 MB in the beginning and 155.9 MB in the end (delta: 24.5 MB). Peak memory consumption was 24.5 MB. Max. memory is 7.1 GB. * TraceAbstraction took 37853.15 ms. Allocated memory was 203.9 MB in the beginning and 499.6 MB in the end (delta: 295.7 MB). Free memory was 155.9 MB in the beginning and 346.9 MB in the end (delta: -191.0 MB). Peak memory consumption was 104.7 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: 37.4s, OverallIterations: 33, TraceHistogramMax: 28, AutomataDifference: 28.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 3341 SDtfs, 10177 SDslu, 14445 SDs, 0 SdLazy, 26514 SolverSat, 5300 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 19.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 743 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 533 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 6.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=32, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 33 MinimizatonAttempts, 8700 StatesRemovedByMinimization, 32 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 22 LocationsWithAnnotation, 250 PreInvPairs, 290 NumberOfFragments, 81 HoareAnnotationTreeSize, 250 FomulaSimplifications, 452 FormulaSimplificationTreeSizeReduction, 0.1s HoareSimplificationTime, 22 FomulaSimplificationsInter, 33 FormulaSimplificationTreeSizeReductionInter, 0.0s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 6.9s 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...