/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.use.separate.solver.for.trace.checks true -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf -i ../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-7d8eed3 [2020-11-07 06:34:03,106 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 06:34:03,110 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 06:34:03,153 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 06:34:03,153 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 06:34:03,155 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 06:34:03,157 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 06:34:03,160 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 06:34:03,162 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 06:34:03,163 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 06:34:03,165 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 06:34:03,166 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 06:34:03,167 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 06:34:03,168 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 06:34:03,170 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 06:34:03,171 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 06:34:03,172 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 06:34:03,174 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 06:34:03,193 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 06:34:03,199 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 06:34:03,202 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 06:34:03,205 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 06:34:03,207 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 06:34:03,209 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 06:34:03,215 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 06:34:03,235 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 06:34:03,236 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 06:34:03,238 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 06:34:03,239 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationFastUPR_32.epf [2020-11-07 06:34:03,263 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 06:34:03,263 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 06:34:03,267 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 06:34:03,267 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 06:34:03,267 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 06:34:03,268 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 06:34:03,268 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 06:34:03,268 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 06:34:03,268 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 06:34:03,268 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 06:34:03,270 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 06:34:03,270 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 06:34:03,270 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 06:34:03,270 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 06:34:03,271 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 06:34:03,271 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 06:34:03,271 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 06:34:03,271 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 06:34:03,272 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 06:34:03,272 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 06:34:03,272 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 06:34:03,272 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 06:34:03,272 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use separate solver for trace checks -> true [2020-11-07 06:34:03,689 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 06:34:03,736 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 06:34:03,739 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 06:34:03,741 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 06:34:03,741 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 06:34:03,742 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-11-07 06:34:03,832 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2276c4945/2961a69afa3f47f4af9a30e8433abbbc/FLAG32d83e901 [2020-11-07 06:34:04,492 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 06:34:04,493 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-11-07 06:34:04,501 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2276c4945/2961a69afa3f47f4af9a30e8433abbbc/FLAG32d83e901 [2020-11-07 06:34:04,869 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2276c4945/2961a69afa3f47f4af9a30e8433abbbc [2020-11-07 06:34:04,872 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 06:34:04,882 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 06:34:04,887 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:04,887 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 06:34:04,892 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 06:34:04,893 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:04" (1/1) ... [2020-11-07 06:34:04,897 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15711b4e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:04, skipping insertion in model container [2020-11-07 06:34:04,897 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 06:34:04" (1/1) ... [2020-11-07 06:34:04,907 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 06:34:04,931 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 06:34:05,155 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:05,165 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 06:34:05,187 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 06:34:05,207 INFO L208 MainTranslator]: Completed translation [2020-11-07 06:34:05,208 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05 WrapperNode [2020-11-07 06:34:05,208 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 06:34:05,209 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 06:34:05,209 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 06:34:05,210 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 06:34:05,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,233 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,233 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,243 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,249 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,251 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... [2020-11-07 06:34:05,254 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 06:34:05,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 06:34:05,255 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 06:34:05,255 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 06:34:05,256 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2020-11-07 06:34:05,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 06:34:05,328 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 06:34:05,329 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 06:34:05,329 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 06:34:05,329 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-11-07 06:34:05,329 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 06:34:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 06:34:05,329 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 06:34:05,330 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 06:34:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-11-07 06:34:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 06:34:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 06:34:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 06:34:05,331 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 06:34:05,332 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 06:34:05,787 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 06:34:05,787 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 06:34:05,789 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:05 BoogieIcfgContainer [2020-11-07 06:34:05,789 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 06:34:05,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 06:34:05,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 06:34:05,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 06:34:05,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 06:34:04" (1/3) ... [2020-11-07 06:34:05,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8deaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:05, skipping insertion in model container [2020-11-07 06:34:05,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 06:34:05" (2/3) ... [2020-11-07 06:34:05,797 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b8deaaa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 06:34:05, skipping insertion in model container [2020-11-07 06:34:05,798 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 06:34:05" (3/3) ... [2020-11-07 06:34:05,799 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-11-07 06:34:05,817 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 06:34:05,821 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 06:34:05,836 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 06:34:05,862 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 06:34:05,862 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 06:34:05,862 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-11-07 06:34:05,862 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 06:34:05,863 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 06:34:05,863 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 06:34:05,863 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 06:34:05,863 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 06:34:05,882 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-07 06:34:05,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 06:34:05,896 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:05,897 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:05,900 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:05,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:05,908 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-11-07 06:34:05,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:05,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769077683] [2020-11-07 06:34:05,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:06,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,225 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:06,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:06,317 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769077683] [2020-11-07 06:34:06,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:06,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 06:34:06,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821009803] [2020-11-07 06:34:06,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 06:34:06,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:06,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 06:34:06,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 06:34:06,347 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-11-07 06:34:06,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:06,755 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-11-07 06:34:06,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 06:34:06,758 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-11-07 06:34:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:06,776 INFO L225 Difference]: With dead ends: 121 [2020-11-07 06:34:06,776 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 06:34:06,780 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-07 06:34:06,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 06:34:06,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-11-07 06:34:06,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 06:34:06,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-07 06:34:06,855 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-11-07 06:34:06,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:06,856 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-07 06:34:06,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 06:34:06,856 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-07 06:34:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 06:34:06,858 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:06,858 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:06,859 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 06:34:06,859 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:06,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:06,860 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-11-07 06:34:06,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:06,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928164901] [2020-11-07 06:34:06,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:06,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:06,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:06,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:06,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,005 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-07 06:34:07,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928164901] [2020-11-07 06:34:07,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:07,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-11-07 06:34:07,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764648829] [2020-11-07 06:34:07,008 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:34:07,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:07,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:34:07,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:34:07,009 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-11-07 06:34:07,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:07,282 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-11-07 06:34:07,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 06:34:07,282 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 06:34:07,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:07,285 INFO L225 Difference]: With dead ends: 100 [2020-11-07 06:34:07,285 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 06:34:07,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-11-07 06:34:07,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 06:34:07,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-11-07 06:34:07,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 06:34:07,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-07 06:34:07,302 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-11-07 06:34:07,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:07,303 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-07 06:34:07,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:34:07,303 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-07 06:34:07,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 06:34:07,305 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,305 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:07,305 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 06:34:07,305 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,306 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-11-07 06:34:07,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944444875] [2020-11-07 06:34:07,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,559 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:07,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944444875] [2020-11-07 06:34:07,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 06:34:07,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 06:34:07,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748265633] [2020-11-07 06:34:07,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 06:34:07,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:07,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 06:34:07,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 06:34:07,563 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-11-07 06:34:07,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:07,900 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-11-07 06:34:07,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 06:34:07,901 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-11-07 06:34:07,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:07,902 INFO L225 Difference]: With dead ends: 109 [2020-11-07 06:34:07,902 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 06:34:07,903 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:34:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 06:34:07,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-11-07 06:34:07,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 06:34:07,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-11-07 06:34:07,916 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-11-07 06:34:07,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:07,916 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-11-07 06:34:07,916 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 06:34:07,917 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-11-07 06:34:07,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 06:34:07,918 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:07,919 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-07 06:34:07,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 06:34:07,919 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:07,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:07,920 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-11-07 06:34:07,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:07,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147314907] [2020-11-07 06:34:07,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:07,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:07,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,171 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:08,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147314907] [2020-11-07 06:34:08,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:08,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-11-07 06:34:08,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176008845] [2020-11-07 06:34:08,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 06:34:08,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 06:34:08,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 06:34:08,174 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-11-07 06:34:08,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:08,571 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-11-07 06:34:08,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 06:34:08,571 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 06:34:08,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:08,573 INFO L225 Difference]: With dead ends: 115 [2020-11-07 06:34:08,573 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 06:34:08,574 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:34:08,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 06:34:08,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-11-07 06:34:08,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-07 06:34:08,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-11-07 06:34:08,586 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-11-07 06:34:08,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:08,586 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-11-07 06:34:08,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 06:34:08,587 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-11-07 06:34:08,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 06:34:08,588 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:08,588 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:08,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 06:34:08,589 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:08,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:08,590 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-11-07 06:34:08,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:08,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088404015] [2020-11-07 06:34:08,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:08,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:08,910 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:08,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088404015] [2020-11-07 06:34:08,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:08,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-11-07 06:34:08,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756474510] [2020-11-07 06:34:08,912 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 06:34:08,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:08,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 06:34:08,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-07 06:34:08,913 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-11-07 06:34:09,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:09,339 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-11-07 06:34:09,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 06:34:09,340 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-11-07 06:34:09,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:09,343 INFO L225 Difference]: With dead ends: 121 [2020-11-07 06:34:09,344 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 06:34:09,347 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:34:09,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 06:34:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-11-07 06:34:09,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 06:34:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-07 06:34:09,364 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-11-07 06:34:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:09,364 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-07 06:34:09,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 06:34:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-07 06:34:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 06:34:09,366 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:09,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:09,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 06:34:09,366 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:09,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:09,367 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-11-07 06:34:09,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:09,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1370860710] [2020-11-07 06:34:09,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:09,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:09,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:09,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1370860710] [2020-11-07 06:34:09,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:09,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-11-07 06:34:09,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976794346] [2020-11-07 06:34:09,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 06:34:09,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:09,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 06:34:09,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 06:34:09,782 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-11-07 06:34:10,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:10,351 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-11-07 06:34:10,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 06:34:10,352 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-11-07 06:34:10,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:10,353 INFO L225 Difference]: With dead ends: 127 [2020-11-07 06:34:10,353 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 06:34:10,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:34:10,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 06:34:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-07 06:34:10,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 06:34:10,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 06:34:10,372 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-11-07 06:34:10,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:10,373 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 06:34:10,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 06:34:10,373 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 06:34:10,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 06:34:10,374 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:10,374 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:10,375 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 06:34:10,380 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:10,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:10,382 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-11-07 06:34:10,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:10,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161899164] [2020-11-07 06:34:10,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:10,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:10,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:10,959 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:10,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161899164] [2020-11-07 06:34:10,960 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:10,960 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-11-07 06:34:10,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474822914] [2020-11-07 06:34:10,961 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 06:34:10,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:10,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 06:34:10,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-07 06:34:10,962 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 06:34:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:11,589 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-11-07 06:34:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 06:34:11,590 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 06:34:11,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:11,593 INFO L225 Difference]: With dead ends: 133 [2020-11-07 06:34:11,594 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 06:34:11,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:34:11,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 06:34:11,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-11-07 06:34:11,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-07 06:34:11,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-11-07 06:34:11,621 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-11-07 06:34:11,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:11,622 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-11-07 06:34:11,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 06:34:11,622 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-11-07 06:34:11,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 06:34:11,624 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:11,624 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:11,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 06:34:11,624 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:11,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:11,625 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-11-07 06:34:11,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:11,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1849091403] [2020-11-07 06:34:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:11,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,677 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:11,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:11,693 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,187 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:12,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1849091403] [2020-11-07 06:34:12,187 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:12,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-11-07 06:34:12,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256963732] [2020-11-07 06:34:12,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 06:34:12,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:12,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 06:34:12,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-07 06:34:12,189 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-11-07 06:34:12,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:12,870 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-11-07 06:34:12,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 06:34:12,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 06:34:12,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:12,872 INFO L225 Difference]: With dead ends: 139 [2020-11-07 06:34:12,872 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 06:34:12,875 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:34:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 06:34:12,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-11-07 06:34:12,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 06:34:12,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-11-07 06:34:12,895 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-11-07 06:34:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:12,895 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-11-07 06:34:12,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 06:34:12,896 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-11-07 06:34:12,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 06:34:12,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:12,906 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:12,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 06:34:12,906 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:12,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:12,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-11-07 06:34:12,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:12,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [688980393] [2020-11-07 06:34:12,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:12,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:12,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:13,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [688980393] [2020-11-07 06:34:13,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:13,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-11-07 06:34:13,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610840403] [2020-11-07 06:34:13,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 06:34:13,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 06:34:13,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-11-07 06:34:13,643 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-11-07 06:34:14,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:14,457 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-11-07 06:34:14,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 06:34:14,457 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-11-07 06:34:14,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:14,459 INFO L225 Difference]: With dead ends: 145 [2020-11-07 06:34:14,459 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 06:34:14,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:34:14,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 06:34:14,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-11-07 06:34:14,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-07 06:34:14,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-11-07 06:34:14,477 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-11-07 06:34:14,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:14,477 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-11-07 06:34:14,477 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 06:34:14,477 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-11-07 06:34:14,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 06:34:14,478 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:14,479 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:14,479 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 06:34:14,479 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:14,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:14,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-11-07 06:34:14,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:14,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212318914] [2020-11-07 06:34:14,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:14,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,567 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:14,584 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:15,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212318914] [2020-11-07 06:34:15,284 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:15,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-11-07 06:34:15,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343320820] [2020-11-07 06:34:15,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 06:34:15,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:15,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 06:34:15,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-07 06:34:15,287 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-11-07 06:34:16,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:16,151 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-11-07 06:34:16,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 06:34:16,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-11-07 06:34:16,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:16,153 INFO L225 Difference]: With dead ends: 151 [2020-11-07 06:34:16,154 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 06:34:16,155 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:34:16,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 06:34:16,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-11-07 06:34:16,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 06:34:16,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-11-07 06:34:16,171 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-11-07 06:34:16,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:16,171 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-11-07 06:34:16,171 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 06:34:16,171 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-11-07 06:34:16,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 06:34:16,172 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:16,173 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:16,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 06:34:16,173 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-11-07 06:34:16,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:16,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756198560] [2020-11-07 06:34:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:16,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:16,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:16,268 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:16,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:17,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756198560] [2020-11-07 06:34:17,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:17,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-11-07 06:34:17,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140359654] [2020-11-07 06:34:17,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 06:34:17,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:17,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 06:34:17,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-07 06:34:17,103 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-11-07 06:34:18,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:18,083 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-11-07 06:34:18,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 06:34:18,084 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-11-07 06:34:18,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:18,085 INFO L225 Difference]: With dead ends: 157 [2020-11-07 06:34:18,085 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 06:34:18,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:34:18,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 06:34:18,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-11-07 06:34:18,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 06:34:18,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-11-07 06:34:18,115 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-11-07 06:34:18,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:18,117 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-11-07 06:34:18,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 06:34:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-11-07 06:34:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 06:34:18,119 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:18,119 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:18,120 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 06:34:18,120 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:18,120 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-11-07 06:34:18,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:18,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269354244] [2020-11-07 06:34:18,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:18,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:18,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:18,216 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:19,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269354244] [2020-11-07 06:34:19,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:19,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-11-07 06:34:19,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788821930] [2020-11-07 06:34:19,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 06:34:19,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:19,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 06:34:19,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-11-07 06:34:19,183 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-11-07 06:34:20,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:20,246 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-11-07 06:34:20,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 06:34:20,246 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-11-07 06:34:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:20,248 INFO L225 Difference]: With dead ends: 163 [2020-11-07 06:34:20,248 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 06:34:20,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:34:20,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 06:34:20,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-11-07 06:34:20,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 06:34:20,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 06:34:20,280 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-11-07 06:34:20,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:20,280 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 06:34:20,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 06:34:20,280 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 06:34:20,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 06:34:20,283 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:20,283 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:20,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 06:34:20,283 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-11-07 06:34:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:20,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [720462443] [2020-11-07 06:34:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:20,374 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:20,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:20,391 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:20,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:21,354 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 280 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:21,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [720462443] [2020-11-07 06:34:21,355 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:21,355 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-11-07 06:34:21,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083847916] [2020-11-07 06:34:21,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 06:34:21,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:21,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 06:34:21,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-11-07 06:34:21,357 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-11-07 06:34:22,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:22,605 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-11-07 06:34:22,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 06:34:22,605 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-11-07 06:34:22,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:22,606 INFO L225 Difference]: With dead ends: 169 [2020-11-07 06:34:22,606 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 06:34:22,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:34:22,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 06:34:22,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-11-07 06:34:22,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 06:34:22,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-11-07 06:34:22,625 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-11-07 06:34:22,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:22,625 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-11-07 06:34:22,626 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 06:34:22,626 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-11-07 06:34:22,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 06:34:22,627 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:22,627 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:22,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 06:34:22,628 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:22,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:22,630 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-11-07 06:34:22,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:22,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2033102343] [2020-11-07 06:34:22,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:22,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:22,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:22,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:22,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:22,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:23,892 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 0 proven. 341 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:23,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2033102343] [2020-11-07 06:34:23,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:23,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-11-07 06:34:23,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443091045] [2020-11-07 06:34:23,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 06:34:23,894 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:23,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 06:34:23,895 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-11-07 06:34:23,895 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-11-07 06:34:25,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:25,295 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-11-07 06:34:25,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 06:34:25,295 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 06:34:25,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:25,296 INFO L225 Difference]: With dead ends: 175 [2020-11-07 06:34:25,296 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 06:34:25,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:34:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 06:34:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-11-07 06:34:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 06:34:25,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-11-07 06:34:25,312 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-11-07 06:34:25,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:25,313 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-11-07 06:34:25,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 06:34:25,313 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-11-07 06:34:25,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-07 06:34:25,314 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:25,314 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:25,315 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 06:34:25,315 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-11-07 06:34:25,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:25,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [985498916] [2020-11-07 06:34:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:25,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:25,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:25,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:25,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:26,628 INFO L134 CoverageAnalysis]: Checked inductivity of 417 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:26,629 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [985498916] [2020-11-07 06:34:26,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:26,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-11-07 06:34:26,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605865890] [2020-11-07 06:34:26,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 06:34:26,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:26,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 06:34:26,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-07 06:34:26,632 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-11-07 06:34:28,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:28,213 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-11-07 06:34:28,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 06:34:28,214 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-11-07 06:34:28,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:28,216 INFO L225 Difference]: With dead ends: 181 [2020-11-07 06:34:28,216 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 06:34:28,218 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:34:28,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 06:34:28,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-07 06:34:28,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 06:34:28,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-11-07 06:34:28,236 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-11-07 06:34:28,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:28,236 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-11-07 06:34:28,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 06:34:28,236 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-11-07 06:34:28,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 06:34:28,238 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:28,238 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:28,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 06:34:28,238 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:28,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:28,239 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-11-07 06:34:28,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:28,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1841238487] [2020-11-07 06:34:28,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:28,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:28,310 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:28,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:28,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:29,714 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 0 proven. 481 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:29,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1841238487] [2020-11-07 06:34:29,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:29,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-11-07 06:34:29,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709804785] [2020-11-07 06:34:29,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 06:34:29,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 06:34:29,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 06:34:29,717 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-11-07 06:34:31,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:31,360 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-11-07 06:34:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 06:34:31,360 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-11-07 06:34:31,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:31,362 INFO L225 Difference]: With dead ends: 187 [2020-11-07 06:34:31,362 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 06:34:31,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:34:31,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 06:34:31,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-07 06:34:31,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 06:34:31,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 06:34:31,382 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-11-07 06:34:31,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:31,382 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 06:34:31,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 06:34:31,382 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 06:34:31,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-07 06:34:31,383 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:31,384 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:31,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 06:34:31,384 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:31,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:31,385 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-11-07 06:34:31,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:31,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45653143] [2020-11-07 06:34:31,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:31,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:31,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:31,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:31,469 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:31,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:33,019 INFO L134 CoverageAnalysis]: Checked inductivity of 569 backedges. 0 proven. 560 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:33,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45653143] [2020-11-07 06:34:33,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:33,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-11-07 06:34:33,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882207404] [2020-11-07 06:34:33,021 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 06:34:33,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:33,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 06:34:33,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 06:34:33,022 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-11-07 06:34:35,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:35,145 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-11-07 06:34:35,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 06:34:35,146 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-11-07 06:34:35,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:35,148 INFO L225 Difference]: With dead ends: 193 [2020-11-07 06:34:35,148 INFO L226 Difference]: Without dead ends: 154 [2020-11-07 06:34:35,150 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:34:35,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-07 06:34:35,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-11-07 06:34:35,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-07 06:34:35,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-11-07 06:34:35,168 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-11-07 06:34:35,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:35,168 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-11-07 06:34:35,169 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 06:34:35,169 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-11-07 06:34:35,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 06:34:35,170 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:35,171 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:35,171 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 06:34:35,171 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:35,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-11-07 06:34:35,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:35,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [560968191] [2020-11-07 06:34:35,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:35,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:35,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:35,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:35,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:35,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:36,917 INFO L134 CoverageAnalysis]: Checked inductivity of 654 backedges. 0 proven. 645 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:36,917 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [560968191] [2020-11-07 06:34:36,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:36,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-11-07 06:34:36,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957541426] [2020-11-07 06:34:36,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 06:34:36,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:36,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 06:34:36,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 06:34:36,920 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-11-07 06:34:39,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:39,192 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-11-07 06:34:39,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 06:34:39,193 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-11-07 06:34:39,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:39,194 INFO L225 Difference]: With dead ends: 199 [2020-11-07 06:34:39,195 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 06:34:39,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:34:39,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 06:34:39,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-11-07 06:34:39,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 06:34:39,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-11-07 06:34:39,226 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-11-07 06:34:39,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:39,226 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-11-07 06:34:39,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 06:34:39,227 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-11-07 06:34:39,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 06:34:39,228 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:39,228 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:39,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 06:34:39,228 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:39,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:39,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-11-07 06:34:39,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:39,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340247645] [2020-11-07 06:34:39,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:39,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:39,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:39,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:39,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:41,274 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 0 proven. 736 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:41,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340247645] [2020-11-07 06:34:41,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:41,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-11-07 06:34:41,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137017749] [2020-11-07 06:34:41,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 06:34:41,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:41,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 06:34:41,277 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 06:34:41,277 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-11-07 06:34:43,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:43,510 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-11-07 06:34:43,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 06:34:43,511 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-11-07 06:34:43,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:43,513 INFO L225 Difference]: With dead ends: 205 [2020-11-07 06:34:43,513 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 06:34:43,516 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:34:43,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 06:34:43,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-11-07 06:34:43,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-07 06:34:43,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-11-07 06:34:43,535 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-11-07 06:34:43,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:43,535 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-11-07 06:34:43,535 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 06:34:43,535 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-11-07 06:34:43,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 06:34:43,536 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:43,536 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:43,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 06:34:43,537 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:43,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-11-07 06:34:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:43,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381672277] [2020-11-07 06:34:43,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:43,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:43,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:43,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 842 backedges. 0 proven. 833 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:45,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381672277] [2020-11-07 06:34:45,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:45,718 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-11-07 06:34:45,718 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321256643] [2020-11-07 06:34:45,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 06:34:45,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:45,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 06:34:45,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 06:34:45,720 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-11-07 06:34:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:48,037 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-11-07 06:34:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 06:34:48,038 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-11-07 06:34:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:48,039 INFO L225 Difference]: With dead ends: 211 [2020-11-07 06:34:48,039 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 06:34:48,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:34:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 06:34:48,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-11-07 06:34:48,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 06:34:48,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-11-07 06:34:48,066 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-11-07 06:34:48,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:48,066 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-11-07 06:34:48,066 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 06:34:48,067 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-11-07 06:34:48,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 06:34:48,068 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:48,068 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:48,068 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 06:34:48,068 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-11-07 06:34:48,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:48,069 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601344840] [2020-11-07 06:34:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:48,150 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:48,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:48,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:48,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 945 backedges. 0 proven. 936 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:50,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601344840] [2020-11-07 06:34:50,481 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:50,481 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-11-07 06:34:50,481 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523558955] [2020-11-07 06:34:50,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 06:34:50,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:50,482 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 06:34:50,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 06:34:50,483 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-11-07 06:34:53,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:53,113 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-11-07 06:34:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 06:34:53,115 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-11-07 06:34:53,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:53,117 INFO L225 Difference]: With dead ends: 217 [2020-11-07 06:34:53,117 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 06:34:53,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:34:53,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 06:34:53,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-11-07 06:34:53,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 06:34:53,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-11-07 06:34:53,143 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-11-07 06:34:53,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:53,144 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-11-07 06:34:53,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 06:34:53,144 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-11-07 06:34:53,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-07 06:34:53,145 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:53,145 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:53,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 06:34:53,145 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:53,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:53,146 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-11-07 06:34:53,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:53,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821838624] [2020-11-07 06:34:53,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:53,254 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:53,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:55,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1054 backedges. 0 proven. 1045 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:34:55,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821838624] [2020-11-07 06:34:55,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:34:55,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-11-07 06:34:55,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681545263] [2020-11-07 06:34:55,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 06:34:55,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:34:55,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 06:34:55,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 06:34:55,759 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-11-07 06:34:58,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:34:58,581 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-11-07 06:34:58,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 06:34:58,585 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-11-07 06:34:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:34:58,586 INFO L225 Difference]: With dead ends: 223 [2020-11-07 06:34:58,586 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 06:34:58,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:34:58,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 06:34:58,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-11-07 06:34:58,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 06:34:58,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-11-07 06:34:58,606 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-11-07 06:34:58,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:34:58,607 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-11-07 06:34:58,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 06:34:58,607 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-11-07 06:34:58,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 06:34:58,608 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:34:58,608 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:34:58,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 06:34:58,608 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:34:58,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:34:58,609 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-11-07 06:34:58,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:34:58,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565830408] [2020-11-07 06:34:58,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:34:58,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:58,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:34:58,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:34:58,717 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:34:58,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:01,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1169 backedges. 0 proven. 1160 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:01,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565830408] [2020-11-07 06:35:01,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:01,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-11-07 06:35:01,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605116100] [2020-11-07 06:35:01,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 06:35:01,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:01,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 06:35:01,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 06:35:01,376 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-11-07 06:35:04,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:04,497 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-11-07 06:35:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 06:35:04,498 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-11-07 06:35:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:04,500 INFO L225 Difference]: With dead ends: 229 [2020-11-07 06:35:04,500 INFO L226 Difference]: Without dead ends: 190 [2020-11-07 06:35:04,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:35:04,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-07 06:35:04,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-11-07 06:35:04,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 06:35:04,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-11-07 06:35:04,526 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-11-07 06:35:04,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:04,527 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-11-07 06:35:04,527 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 06:35:04,527 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-11-07 06:35:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 06:35:04,528 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:04,528 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:04,528 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 06:35:04,529 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:04,529 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-11-07 06:35:04,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:04,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1367640622] [2020-11-07 06:35:04,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:04,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:04,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:04,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:04,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:04,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:07,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1290 backedges. 0 proven. 1281 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:07,619 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1367640622] [2020-11-07 06:35:07,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:07,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-11-07 06:35:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802954224] [2020-11-07 06:35:07,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 06:35:07,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 06:35:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 06:35:07,621 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-11-07 06:35:10,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:10,787 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-11-07 06:35:10,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 06:35:10,788 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-11-07 06:35:10,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:10,790 INFO L225 Difference]: With dead ends: 235 [2020-11-07 06:35:10,791 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 06:35:10,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:35:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 06:35:10,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-11-07 06:35:10,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 06:35:10,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-11-07 06:35:10,819 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-11-07 06:35:10,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:10,820 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-11-07 06:35:10,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 06:35:10,820 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-11-07 06:35:10,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-07 06:35:10,821 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:10,821 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:10,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 06:35:10,822 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-11-07 06:35:10,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:10,822 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1298728314] [2020-11-07 06:35:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:10,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:10,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:10,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:10,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:10,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:14,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1417 backedges. 0 proven. 1408 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:14,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1298728314] [2020-11-07 06:35:14,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:14,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-11-07 06:35:14,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144217083] [2020-11-07 06:35:14,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 06:35:14,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:14,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 06:35:14,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 06:35:14,092 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-11-07 06:35:17,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:17,678 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-11-07 06:35:17,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 06:35:17,679 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-11-07 06:35:17,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:17,681 INFO L225 Difference]: With dead ends: 241 [2020-11-07 06:35:17,681 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 06:35:17,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 06:35:17,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 06:35:17,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-11-07 06:35:17,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 06:35:17,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-11-07 06:35:17,717 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-11-07 06:35:17,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:17,717 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-11-07 06:35:17,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 06:35:17,718 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-11-07 06:35:17,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 06:35:17,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:17,719 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:17,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 06:35:17,720 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:17,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:17,720 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-11-07 06:35:17,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:17,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199558098] [2020-11-07 06:35:17,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:17,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:17,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:17,834 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:17,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:21,327 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 1541 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:21,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199558098] [2020-11-07 06:35:21,327 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:21,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-11-07 06:35:21,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499397043] [2020-11-07 06:35:21,328 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 06:35:21,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:21,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 06:35:21,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 06:35:21,329 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-11-07 06:35:25,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:25,302 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-11-07 06:35:25,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 06:35:25,303 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-11-07 06:35:25,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:25,305 INFO L225 Difference]: With dead ends: 247 [2020-11-07 06:35:25,305 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 06:35:25,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:35:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 06:35:25,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-11-07 06:35:25,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 06:35:25,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-11-07 06:35:25,343 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-11-07 06:35:25,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:25,344 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-11-07 06:35:25,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 06:35:25,344 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-11-07 06:35:25,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 06:35:25,345 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:25,345 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:25,345 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 06:35:25,345 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:25,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:25,346 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-11-07 06:35:25,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:25,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711224584] [2020-11-07 06:35:25,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:25,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:25,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:25,458 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:29,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1689 backedges. 0 proven. 1680 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:29,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711224584] [2020-11-07 06:35:29,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:29,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-11-07 06:35:29,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186959650] [2020-11-07 06:35:29,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 06:35:29,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:29,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 06:35:29,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 06:35:29,063 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-11-07 06:35:33,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:33,548 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-11-07 06:35:33,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 06:35:33,549 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-11-07 06:35:33,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:33,551 INFO L225 Difference]: With dead ends: 253 [2020-11-07 06:35:33,551 INFO L226 Difference]: Without dead ends: 214 [2020-11-07 06:35:33,553 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 06:35:33,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-07 06:35:33,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-11-07 06:35:33,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 06:35:33,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-11-07 06:35:33,590 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-11-07 06:35:33,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:33,590 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-11-07 06:35:33,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 06:35:33,590 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-11-07 06:35:33,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 06:35:33,591 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:33,592 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:33,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 06:35:33,592 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:33,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:33,593 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-11-07 06:35:33,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:33,593 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827222763] [2020-11-07 06:35:33,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:33,709 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:33,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:37,799 INFO L134 CoverageAnalysis]: Checked inductivity of 1834 backedges. 0 proven. 1825 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:37,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827222763] [2020-11-07 06:35:37,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:37,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-11-07 06:35:37,799 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803632544] [2020-11-07 06:35:37,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 06:35:37,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:37,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 06:35:37,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 06:35:37,801 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-11-07 06:35:42,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:42,243 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-11-07 06:35:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 06:35:42,244 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-11-07 06:35:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:42,246 INFO L225 Difference]: With dead ends: 259 [2020-11-07 06:35:42,246 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 06:35:42,248 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 06:35:42,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 06:35:42,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-11-07 06:35:42,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-07 06:35:42,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-11-07 06:35:42,290 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-11-07 06:35:42,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:42,291 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-11-07 06:35:42,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 06:35:42,291 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-11-07 06:35:42,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 06:35:42,293 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:42,293 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:42,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 06:35:42,293 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:42,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:42,294 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-11-07 06:35:42,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:42,294 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396846337] [2020-11-07 06:35:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:42,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:42,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:42,420 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:42,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:46,789 INFO L134 CoverageAnalysis]: Checked inductivity of 1985 backedges. 0 proven. 1976 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:46,789 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396846337] [2020-11-07 06:35:46,789 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:46,789 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-11-07 06:35:46,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158470397] [2020-11-07 06:35:46,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 06:35:46,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:46,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 06:35:46,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 06:35:46,790 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-11-07 06:35:51,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:35:51,772 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-11-07 06:35:51,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 06:35:51,773 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-11-07 06:35:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:35:51,775 INFO L225 Difference]: With dead ends: 265 [2020-11-07 06:35:51,775 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 06:35:51,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 06:35:51,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 06:35:51,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-11-07 06:35:51,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-11-07 06:35:51,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-11-07 06:35:51,817 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-11-07 06:35:51,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:35:51,818 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-11-07 06:35:51,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 06:35:51,818 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-11-07 06:35:51,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-11-07 06:35:51,819 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:35:51,820 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:35:51,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 06:35:51,820 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:35:51,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:35:51,820 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-11-07 06:35:51,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:35:51,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [460757017] [2020-11-07 06:35:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:35:51,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:35:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:51,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:35:51,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:35:56,667 INFO L134 CoverageAnalysis]: Checked inductivity of 2142 backedges. 0 proven. 2133 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:35:56,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [460757017] [2020-11-07 06:35:56,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:35:56,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-11-07 06:35:56,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464502321] [2020-11-07 06:35:56,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 06:35:56,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:35:56,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 06:35:56,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 06:35:56,669 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-11-07 06:36:02,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:02,112 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-11-07 06:36:02,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 06:36:02,113 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-11-07 06:36:02,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:02,115 INFO L225 Difference]: With dead ends: 271 [2020-11-07 06:36:02,116 INFO L226 Difference]: Without dead ends: 232 [2020-11-07 06:36:02,117 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 06:36:02,118 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-07 06:36:02,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-11-07 06:36:02,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 06:36:02,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-11-07 06:36:02,161 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-11-07 06:36:02,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:02,162 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-11-07 06:36:02,162 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 06:36:02,162 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-11-07 06:36:02,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 06:36:02,163 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:02,163 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:36:02,164 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 06:36:02,164 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:02,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:02,164 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-11-07 06:36:02,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:02,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508243285] [2020-11-07 06:36:02,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:02,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:02,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:02,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2305 backedges. 0 proven. 2296 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:07,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508243285] [2020-11-07 06:36:07,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:07,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-11-07 06:36:07,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224739817] [2020-11-07 06:36:07,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 06:36:07,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:07,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 06:36:07,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 06:36:07,383 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-11-07 06:36:13,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:13,033 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-11-07 06:36:13,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 06:36:13,034 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-11-07 06:36:13,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:13,036 INFO L225 Difference]: With dead ends: 277 [2020-11-07 06:36:13,036 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 06:36:13,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-11-07 06:36:13,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 06:36:13,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-11-07 06:36:13,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 06:36:13,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-11-07 06:36:13,083 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-11-07 06:36:13,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:13,084 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-11-07 06:36:13,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 06:36:13,084 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-11-07 06:36:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-11-07 06:36:13,085 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:13,086 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:36:13,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 06:36:13,086 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-11-07 06:36:13,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:13,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [113493809] [2020-11-07 06:36:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:13,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:13,199 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:13,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:13,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:13,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:18,741 INFO L134 CoverageAnalysis]: Checked inductivity of 2474 backedges. 0 proven. 2465 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:18,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [113493809] [2020-11-07 06:36:18,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:18,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65] total 65 [2020-11-07 06:36:18,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107389271] [2020-11-07 06:36:18,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 06:36:18,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:18,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 06:36:18,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 06:36:18,743 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-11-07 06:36:24,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:24,800 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-11-07 06:36:24,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 06:36:24,802 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-11-07 06:36:24,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:24,804 INFO L225 Difference]: With dead ends: 283 [2020-11-07 06:36:24,804 INFO L226 Difference]: Without dead ends: 244 [2020-11-07 06:36:24,806 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 06:36:24,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-11-07 06:36:24,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-11-07 06:36:24,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 06:36:24,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-11-07 06:36:24,853 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-11-07 06:36:24,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:24,853 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-11-07 06:36:24,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 06:36:24,853 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-11-07 06:36:24,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 06:36:24,855 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:24,855 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:36:24,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 06:36:24,855 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:24,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:24,856 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-11-07 06:36:24,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:24,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1523590379] [2020-11-07 06:36:24,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:24,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:24,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:24,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:25,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:30,976 INFO L134 CoverageAnalysis]: Checked inductivity of 2649 backedges. 0 proven. 2640 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:30,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1523590379] [2020-11-07 06:36:30,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:30,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67] total 67 [2020-11-07 06:36:30,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991677275] [2020-11-07 06:36:30,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 06:36:30,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:30,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 06:36:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 06:36:30,978 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-11-07 06:36:37,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:37,742 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-11-07 06:36:37,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 06:36:37,743 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-11-07 06:36:37,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:37,746 INFO L225 Difference]: With dead ends: 289 [2020-11-07 06:36:37,746 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 06:36:37,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 06:36:37,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 06:36:37,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-11-07 06:36:37,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 06:36:37,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-11-07 06:36:37,797 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-11-07 06:36:37,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:37,797 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-11-07 06:36:37,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 06:36:37,798 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-11-07 06:36:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 06:36:37,799 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:37,799 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:36:37,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 06:36:37,800 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:37,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:37,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-11-07 06:36:37,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:37,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1122193302] [2020-11-07 06:36:37,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:37,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:37,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:37,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:37,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:37,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:44,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2830 backedges. 0 proven. 2821 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:44,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1122193302] [2020-11-07 06:36:44,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:44,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69] total 69 [2020-11-07 06:36:44,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076582926] [2020-11-07 06:36:44,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-07 06:36:44,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:44,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-07 06:36:44,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 06:36:44,299 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-11-07 06:36:51,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:36:51,306 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-11-07 06:36:51,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 06:36:51,307 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-11-07 06:36:51,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:36:51,309 INFO L225 Difference]: With dead ends: 295 [2020-11-07 06:36:51,309 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 06:36:51,311 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 12.1s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 06:36:51,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 06:36:51,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-11-07 06:36:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 06:36:51,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-11-07 06:36:51,356 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-11-07 06:36:51,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:36:51,357 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-11-07 06:36:51,357 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-07 06:36:51,357 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-11-07 06:36:51,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-07 06:36:51,358 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:36:51,358 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:36:51,358 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 06:36:51,359 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:36:51,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:36:51,359 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-11-07 06:36:51,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:36:51,359 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [757817070] [2020-11-07 06:36:51,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:36:51,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:51,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:36:51,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:51,492 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:36:51,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:36:58,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3017 backedges. 0 proven. 3008 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:36:58,210 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [757817070] [2020-11-07 06:36:58,210 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:36:58,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71] total 71 [2020-11-07 06:36:58,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978647337] [2020-11-07 06:36:58,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-07 06:36:58,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:36:58,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-07 06:36:58,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 06:36:58,212 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-11-07 06:37:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:06,309 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-11-07 06:37:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 06:37:06,309 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-11-07 06:37:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:06,311 INFO L225 Difference]: With dead ends: 301 [2020-11-07 06:37:06,311 INFO L226 Difference]: Without dead ends: 262 [2020-11-07 06:37:06,313 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 06:37:06,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-07 06:37:06,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-11-07 06:37:06,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 06:37:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-11-07 06:37:06,366 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-11-07 06:37:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:06,366 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-11-07 06:37:06,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-07 06:37:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-11-07 06:37:06,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 06:37:06,367 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:06,368 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:37:06,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 06:37:06,368 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:06,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-11-07 06:37:06,369 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:06,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1941811375] [2020-11-07 06:37:06,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:06,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:06,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:06,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:13,662 INFO L134 CoverageAnalysis]: Checked inductivity of 3210 backedges. 0 proven. 3201 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:13,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1941811375] [2020-11-07 06:37:13,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:13,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73] total 73 [2020-11-07 06:37:13,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054895562] [2020-11-07 06:37:13,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-07 06:37:13,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:13,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-07 06:37:13,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 06:37:13,664 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-11-07 06:37:22,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:22,407 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-11-07 06:37:22,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-11-07 06:37:22,408 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-11-07 06:37:22,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:22,410 INFO L225 Difference]: With dead ends: 307 [2020-11-07 06:37:22,410 INFO L226 Difference]: Without dead ends: 268 [2020-11-07 06:37:22,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 06:37:22,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-07 06:37:22,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-11-07 06:37:22,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-07 06:37:22,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-11-07 06:37:22,474 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-11-07 06:37:22,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:22,474 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-11-07 06:37:22,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-07 06:37:22,474 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-11-07 06:37:22,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 06:37:22,476 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:22,476 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:37:22,476 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 06:37:22,476 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:22,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:22,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-11-07 06:37:22,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:22,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087854760] [2020-11-07 06:37:22,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:22,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:22,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:22,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:22,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:22,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:29,968 INFO L134 CoverageAnalysis]: Checked inductivity of 3409 backedges. 0 proven. 3400 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:29,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087854760] [2020-11-07 06:37:29,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:29,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-11-07 06:37:29,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013807287] [2020-11-07 06:37:29,969 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-07 06:37:29,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:29,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-07 06:37:29,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 06:37:29,970 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-11-07 06:37:38,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:38,207 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-11-07 06:37:38,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-11-07 06:37:38,208 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-11-07 06:37:38,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:38,210 INFO L225 Difference]: With dead ends: 313 [2020-11-07 06:37:38,210 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 06:37:38,212 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-11-07 06:37:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 06:37:38,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-11-07 06:37:38,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-11-07 06:37:38,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-11-07 06:37:38,270 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-11-07 06:37:38,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:38,271 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-11-07 06:37:38,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-07 06:37:38,271 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-11-07 06:37:38,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-11-07 06:37:38,273 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:38,273 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:37:38,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 06:37:38,273 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:38,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:38,274 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-11-07 06:37:38,274 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:38,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [185595022] [2020-11-07 06:37:38,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:38,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:38,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:38,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:38,414 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:38,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:46,298 INFO L134 CoverageAnalysis]: Checked inductivity of 3614 backedges. 0 proven. 3605 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:37:46,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [185595022] [2020-11-07 06:37:46,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:37:46,299 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77] total 77 [2020-11-07 06:37:46,299 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406961267] [2020-11-07 06:37:46,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-07 06:37:46,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:37:46,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-07 06:37:46,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 06:37:46,301 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-11-07 06:37:55,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:37:55,618 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-11-07 06:37:55,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 06:37:55,619 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-11-07 06:37:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:37:55,621 INFO L225 Difference]: With dead ends: 319 [2020-11-07 06:37:55,621 INFO L226 Difference]: Without dead ends: 280 [2020-11-07 06:37:55,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 06:37:55,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-11-07 06:37:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-11-07 06:37:55,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-07 06:37:55,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-11-07 06:37:55,685 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-11-07 06:37:55,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:37:55,685 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-11-07 06:37:55,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-07 06:37:55,685 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-11-07 06:37:55,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-11-07 06:37:55,687 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:37:55,687 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:37:55,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 06:37:55,688 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:37:55,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:37:55,688 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-11-07 06:37:55,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:37:55,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069975017] [2020-11-07 06:37:55,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:37:55,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,836 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:37:55,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:37:55,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:37:55,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:04,428 INFO L134 CoverageAnalysis]: Checked inductivity of 3825 backedges. 0 proven. 3816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:04,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069975017] [2020-11-07 06:38:04,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:04,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79] total 79 [2020-11-07 06:38:04,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365427749] [2020-11-07 06:38:04,429 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-11-07 06:38:04,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:04,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-11-07 06:38:04,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 06:38:04,430 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-11-07 06:38:14,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:14,412 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-11-07 06:38:14,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-11-07 06:38:14,413 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-11-07 06:38:14,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:14,415 INFO L225 Difference]: With dead ends: 325 [2020-11-07 06:38:14,415 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 06:38:14,417 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 06:38:14,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 06:38:14,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-11-07 06:38:14,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-11-07 06:38:14,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-11-07 06:38:14,479 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-11-07 06:38:14,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:14,479 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-11-07 06:38:14,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-11-07 06:38:14,480 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-11-07 06:38:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-11-07 06:38:14,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:14,481 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:38:14,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 06:38:14,482 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:14,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:14,482 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-11-07 06:38:14,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:14,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588088822] [2020-11-07 06:38:14,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:14,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:14,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:14,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:38:14,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:24,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4042 backedges. 0 proven. 4033 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:24,743 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588088822] [2020-11-07 06:38:24,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:24,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81] total 81 [2020-11-07 06:38:24,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186984946] [2020-11-07 06:38:24,744 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-11-07 06:38:24,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:24,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-11-07 06:38:24,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 06:38:24,745 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-11-07 06:38:36,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:36,595 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-11-07 06:38:36,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-11-07 06:38:36,597 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-11-07 06:38:36,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:36,599 INFO L225 Difference]: With dead ends: 331 [2020-11-07 06:38:36,599 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 06:38:36,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 06:38:36,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 06:38:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-11-07 06:38:36,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 06:38:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-11-07 06:38:36,677 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-11-07 06:38:36,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:36,677 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-11-07 06:38:36,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-11-07 06:38:36,677 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-11-07 06:38:36,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 06:38:36,679 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:36,679 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:38:36,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 06:38:36,679 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:36,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-11-07 06:38:36,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:36,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677888119] [2020-11-07 06:38:36,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:36,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:36,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:36,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:38:36,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:47,305 INFO L134 CoverageAnalysis]: Checked inductivity of 4265 backedges. 0 proven. 4256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:38:47,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677888119] [2020-11-07 06:38:47,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:38:47,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83] total 83 [2020-11-07 06:38:47,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153705867] [2020-11-07 06:38:47,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-07 06:38:47,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:38:47,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-07 06:38:47,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 06:38:47,308 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-11-07 06:38:58,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:38:58,985 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-11-07 06:38:58,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 06:38:58,987 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-11-07 06:38:58,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:38:58,990 INFO L225 Difference]: With dead ends: 337 [2020-11-07 06:38:58,990 INFO L226 Difference]: Without dead ends: 298 [2020-11-07 06:38:58,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 20.3s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 06:38:58,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-07 06:38:59,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-11-07 06:38:59,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 06:38:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-11-07 06:38:59,078 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-11-07 06:38:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:38:59,078 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-11-07 06:38:59,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-07 06:38:59,078 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-11-07 06:38:59,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-11-07 06:38:59,080 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:38:59,080 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:38:59,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 06:38:59,081 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:38:59,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:38:59,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-11-07 06:38:59,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:38:59,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079070253] [2020-11-07 06:38:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:38:59,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:59,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:38:59,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:38:59,247 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:38:59,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:11,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4494 backedges. 0 proven. 4485 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:39:11,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079070253] [2020-11-07 06:39:11,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:11,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85] total 85 [2020-11-07 06:39:11,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316088687] [2020-11-07 06:39:11,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-07 06:39:11,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:11,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-07 06:39:11,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 06:39:11,368 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-11-07 06:39:24,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:24,286 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-11-07 06:39:24,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-11-07 06:39:24,288 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-11-07 06:39:24,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:24,290 INFO L225 Difference]: With dead ends: 343 [2020-11-07 06:39:24,290 INFO L226 Difference]: Without dead ends: 304 [2020-11-07 06:39:24,292 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 06:39:24,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-11-07 06:39:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-11-07 06:39:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-11-07 06:39:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-11-07 06:39:24,367 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-11-07 06:39:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:24,367 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-11-07 06:39:24,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-07 06:39:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-11-07 06:39:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-11-07 06:39:24,369 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:24,370 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:39:24,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 06:39:24,370 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:24,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:24,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-11-07 06:39:24,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:24,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733679485] [2020-11-07 06:39:24,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:24,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:24,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:24,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:39:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:36,318 INFO L134 CoverageAnalysis]: Checked inductivity of 4729 backedges. 0 proven. 4720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:39:36,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733679485] [2020-11-07 06:39:36,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:39:36,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87] total 87 [2020-11-07 06:39:36,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121940126] [2020-11-07 06:39:36,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-11-07 06:39:36,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:39:36,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-11-07 06:39:36,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 06:39:36,320 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-11-07 06:39:49,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:39:49,384 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-11-07 06:39:49,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-11-07 06:39:49,386 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-11-07 06:39:49,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:39:49,388 INFO L225 Difference]: With dead ends: 349 [2020-11-07 06:39:49,388 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 06:39:49,391 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 22.9s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-11-07 06:39:49,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 06:39:49,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-11-07 06:39:49,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-11-07 06:39:49,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-11-07 06:39:49,465 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-11-07 06:39:49,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:39:49,466 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-11-07 06:39:49,466 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-11-07 06:39:49,466 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-11-07 06:39:49,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-11-07 06:39:49,467 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:39:49,468 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:39:49,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 06:39:49,468 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:39:49,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:39:49,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-11-07 06:39:49,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:39:49,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469211195] [2020-11-07 06:39:49,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:39:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,614 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:39:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:39:49,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:39:49,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:02,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4970 backedges. 0 proven. 4961 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:40:02,409 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469211195] [2020-11-07 06:40:02,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:02,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89] total 89 [2020-11-07 06:40:02,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854860688] [2020-11-07 06:40:02,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-11-07 06:40:02,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:02,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-11-07 06:40:02,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 06:40:02,411 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-11-07 06:40:16,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:16,475 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-11-07 06:40:16,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 06:40:16,478 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-11-07 06:40:16,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:16,480 INFO L225 Difference]: With dead ends: 355 [2020-11-07 06:40:16,480 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 06:40:16,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 25.2s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 06:40:16,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 06:40:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-11-07 06:40:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-11-07 06:40:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-11-07 06:40:16,565 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-11-07 06:40:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:16,566 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-11-07 06:40:16,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-11-07 06:40:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-11-07 06:40:16,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-11-07 06:40:16,568 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:16,568 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:40:16,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 06:40:16,569 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:16,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:16,569 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-11-07 06:40:16,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:16,569 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682758658] [2020-11-07 06:40:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:16,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:16,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:16,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:40:16,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:32,661 INFO L134 CoverageAnalysis]: Checked inductivity of 5217 backedges. 0 proven. 5208 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:40:32,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682758658] [2020-11-07 06:40:32,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:40:32,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91] total 91 [2020-11-07 06:40:32,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730433035] [2020-11-07 06:40:32,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-11-07 06:40:32,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:40:32,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-11-07 06:40:32,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 06:40:32,663 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-11-07 06:40:51,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:40:51,569 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-11-07 06:40:51,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-11-07 06:40:51,572 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-11-07 06:40:51,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:40:51,574 INFO L225 Difference]: With dead ends: 361 [2020-11-07 06:40:51,574 INFO L226 Difference]: Without dead ends: 322 [2020-11-07 06:40:51,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-11-07 06:40:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-11-07 06:40:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-11-07 06:40:51,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 06:40:51,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-11-07 06:40:51,660 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-11-07 06:40:51,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:40:51,664 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-11-07 06:40:51,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-11-07 06:40:51,665 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-11-07 06:40:51,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 06:40:51,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:40:51,666 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:40:51,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 06:40:51,667 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:40:51,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:40:51,667 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-11-07 06:40:51,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:40:51,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1792076929] [2020-11-07 06:40:51,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:40:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:51,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:40:51,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:40:51,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:40:51,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:09,396 INFO L134 CoverageAnalysis]: Checked inductivity of 5470 backedges. 0 proven. 5461 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:41:09,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1792076929] [2020-11-07 06:41:09,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:09,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93] total 93 [2020-11-07 06:41:09,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776725642] [2020-11-07 06:41:09,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-11-07 06:41:09,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:09,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-11-07 06:41:09,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-11-07 06:41:09,398 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-11-07 06:41:29,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:41:29,792 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-11-07 06:41:29,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-11-07 06:41:29,794 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-11-07 06:41:29,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:41:29,796 INFO L225 Difference]: With dead ends: 367 [2020-11-07 06:41:29,796 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 06:41:29,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 34.6s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 06:41:29,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 06:41:29,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-11-07 06:41:29,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-11-07 06:41:29,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-11-07 06:41:29,888 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-11-07 06:41:29,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:41:29,889 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-11-07 06:41:29,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-11-07 06:41:29,889 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-11-07 06:41:29,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-11-07 06:41:29,891 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:41:29,891 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:41:29,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 06:41:29,891 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:41:29,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:41:29,892 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-11-07 06:41:29,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:41:29,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039959122] [2020-11-07 06:41:29,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:41:29,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:30,036 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:41:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:30,064 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:41:30,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:41:49,739 INFO L134 CoverageAnalysis]: Checked inductivity of 5729 backedges. 0 proven. 5720 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:41:49,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039959122] [2020-11-07 06:41:49,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:41:49,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95] total 95 [2020-11-07 06:41:49,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747412186] [2020-11-07 06:41:49,740 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-07 06:41:49,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:41:49,741 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-07 06:41:49,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 06:41:49,741 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-11-07 06:42:11,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:11,737 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-11-07 06:42:11,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-11-07 06:42:11,740 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-11-07 06:42:11,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:11,742 INFO L225 Difference]: With dead ends: 373 [2020-11-07 06:42:11,742 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 06:42:11,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 37.6s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 06:42:11,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 06:42:11,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-11-07 06:42:11,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-11-07 06:42:11,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-11-07 06:42:11,830 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-11-07 06:42:11,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:11,831 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-11-07 06:42:11,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-07 06:42:11,831 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-11-07 06:42:11,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 06:42:11,833 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:11,833 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:42:11,833 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 06:42:11,833 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:11,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:11,834 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-11-07 06:42:11,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:11,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224246066] [2020-11-07 06:42:11,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:12,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:12,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:12,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:42:12,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:33,296 INFO L134 CoverageAnalysis]: Checked inductivity of 5994 backedges. 0 proven. 5985 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:42:33,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224246066] [2020-11-07 06:42:33,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:42:33,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97] total 97 [2020-11-07 06:42:33,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208721846] [2020-11-07 06:42:33,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-07 06:42:33,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:42:33,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-07 06:42:33,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 06:42:33,298 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-11-07 06:42:56,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:42:56,533 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-11-07 06:42:56,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-11-07 06:42:56,536 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-11-07 06:42:56,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:42:56,538 INFO L225 Difference]: With dead ends: 379 [2020-11-07 06:42:56,538 INFO L226 Difference]: Without dead ends: 340 [2020-11-07 06:42:56,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 42.4s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 06:42:56,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-11-07 06:42:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-11-07 06:42:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 06:42:56,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-11-07 06:42:56,607 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-11-07 06:42:56,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:42:56,607 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-11-07 06:42:56,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-07 06:42:56,607 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-11-07 06:42:56,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-07 06:42:56,609 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:42:56,609 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:42:56,609 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 06:42:56,609 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:42:56,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:42:56,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-11-07 06:42:56,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:42:56,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212575092] [2020-11-07 06:42:56,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:42:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:56,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:42:56,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:42:56,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:42:56,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:21,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6265 backedges. 0 proven. 6256 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:43:21,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212575092] [2020-11-07 06:43:21,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:43:21,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99] total 99 [2020-11-07 06:43:21,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063980890] [2020-11-07 06:43:21,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-07 06:43:21,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:43:21,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-07 06:43:21,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 06:43:21,707 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states. [2020-11-07 06:43:49,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:43:49,311 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2020-11-07 06:43:49,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2020-11-07 06:43:49,315 INFO L78 Accepts]: Start accepts. Automaton has 99 states. Word has length 325 [2020-11-07 06:43:49,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:43:49,318 INFO L225 Difference]: With dead ends: 385 [2020-11-07 06:43:49,318 INFO L226 Difference]: Without dead ends: 346 [2020-11-07 06:43:49,321 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6903 ImplicationChecksByTransitivity, 49.3s TimeCoverageRelationStatistics Valid=11489, Invalid=26341, Unknown=0, NotChecked=0, Total=37830 [2020-11-07 06:43:49,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2020-11-07 06:43:49,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2020-11-07 06:43:49,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-11-07 06:43:49,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 347 transitions. [2020-11-07 06:43:49,444 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 347 transitions. Word has length 325 [2020-11-07 06:43:49,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:43:49,444 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 347 transitions. [2020-11-07 06:43:49,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 99 states. [2020-11-07 06:43:49,444 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 347 transitions. [2020-11-07 06:43:49,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2020-11-07 06:43:49,446 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:43:49,447 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:43:49,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-11-07 06:43:49,447 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:43:49,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:43:49,447 INFO L82 PathProgramCache]: Analyzing trace with hash 418165828, now seen corresponding path program 47 times [2020-11-07 06:43:49,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:43:49,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [636792940] [2020-11-07 06:43:49,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:43:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:49,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:43:49,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:49,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:43:49,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:43:52,343 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6542 backedges. 0 proven. 6533 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:44:20,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [636792940] [2020-11-07 06:44:20,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:44:20,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101] total 101 [2020-11-07 06:44:20,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594646474] [2020-11-07 06:44:20,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 101 states [2020-11-07 06:44:20,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:44:20,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2020-11-07 06:44:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2503, Invalid=7597, Unknown=0, NotChecked=0, Total=10100 [2020-11-07 06:44:20,186 INFO L87 Difference]: Start difference. First operand 342 states and 347 transitions. Second operand 101 states. [2020-11-07 06:44:21,271 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 06:44:53,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:44:53,699 INFO L93 Difference]: Finished difference Result 391 states and 401 transitions. [2020-11-07 06:44:53,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2020-11-07 06:44:53,703 INFO L78 Accepts]: Start accepts. Automaton has 101 states. Word has length 331 [2020-11-07 06:44:53,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:44:53,705 INFO L225 Difference]: With dead ends: 391 [2020-11-07 06:44:53,705 INFO L226 Difference]: Without dead ends: 352 [2020-11-07 06:44:53,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7194 ImplicationChecksByTransitivity, 60.4s TimeCoverageRelationStatistics Valid=11973, Invalid=27429, Unknown=0, NotChecked=0, Total=39402 [2020-11-07 06:44:53,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2020-11-07 06:44:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 348. [2020-11-07 06:44:53,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 348 states. [2020-11-07 06:44:53,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 353 transitions. [2020-11-07 06:44:53,807 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 353 transitions. Word has length 331 [2020-11-07 06:44:53,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:44:53,808 INFO L481 AbstractCegarLoop]: Abstraction has 348 states and 353 transitions. [2020-11-07 06:44:53,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 101 states. [2020-11-07 06:44:53,808 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 353 transitions. [2020-11-07 06:44:53,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 338 [2020-11-07 06:44:53,810 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:44:53,810 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:44:53,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-11-07 06:44:53,810 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:44:53,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:44:53,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1593446912, now seen corresponding path program 48 times [2020-11-07 06:44:53,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:44:53,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299089758] [2020-11-07 06:44:53,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:44:53,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:53,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:44:53,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:54,010 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:44:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:44:54,607 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:58,608 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:59,133 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:59,396 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:44:59,663 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:00,217 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:00,502 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:01,682 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:01,995 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:02,318 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:02,645 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:04,306 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:05,011 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:06,779 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:07,213 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:07,627 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:08,036 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:08,460 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:10,652 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:11,102 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:12,887 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:13,351 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:13,832 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:14,320 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:14,814 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:15,307 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:15,813 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:16,333 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:16,870 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:17,396 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:17,937 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:18,470 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:19,006 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:19,548 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:20,098 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:20,656 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:21,216 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:21,786 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:22,363 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:22,937 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:23,526 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:24,116 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:24,740 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:25,343 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:25,952 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:27,110 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:27,805 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:29,168 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:30,773 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:45:31,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6825 backedges. 0 proven. 6816 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:45:31,373 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299089758] [2020-11-07 06:45:31,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:45:31,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103] total 103 [2020-11-07 06:45:31,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893114519] [2020-11-07 06:45:31,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 103 states [2020-11-07 06:45:31,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:45:31,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2020-11-07 06:45:31,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2604, Invalid=7902, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 06:45:31,377 INFO L87 Difference]: Start difference. First operand 348 states and 353 transitions. Second operand 103 states. [2020-11-07 06:45:32,821 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 06:46:12,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 06:46:12,406 INFO L93 Difference]: Finished difference Result 397 states and 407 transitions. [2020-11-07 06:46:12,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2020-11-07 06:46:12,412 INFO L78 Accepts]: Start accepts. Automaton has 103 states. Word has length 337 [2020-11-07 06:46:12,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 06:46:12,414 INFO L225 Difference]: With dead ends: 397 [2020-11-07 06:46:12,414 INFO L226 Difference]: Without dead ends: 358 [2020-11-07 06:46:12,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7491 ImplicationChecksByTransitivity, 74.2s TimeCoverageRelationStatistics Valid=12467, Invalid=28539, Unknown=0, NotChecked=0, Total=41006 [2020-11-07 06:46:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-11-07 06:46:12,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 354. [2020-11-07 06:46:12,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-11-07 06:46:12,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 359 transitions. [2020-11-07 06:46:12,482 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 359 transitions. Word has length 337 [2020-11-07 06:46:12,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 06:46:12,483 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 359 transitions. [2020-11-07 06:46:12,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 103 states. [2020-11-07 06:46:12,483 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 359 transitions. [2020-11-07 06:46:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2020-11-07 06:46:12,485 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 06:46:12,485 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 2, 2, 2, 2, 2, 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, 1, 1] [2020-11-07 06:46:12,485 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-11-07 06:46:12,485 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 06:46:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 06:46:12,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1545522500, now seen corresponding path program 49 times [2020-11-07 06:46:12,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 06:46:12,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1043841687] [2020-11-07 06:46:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 06:46:12,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:12,655 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 06:46:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:12,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 06:46:12,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 06:46:13,048 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,203 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,390 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,557 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,736 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:13,916 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:14,099 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:14,285 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:15,627 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:15,871 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,121 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,379 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,640 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:16,908 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:17,177 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:17,452 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:17,728 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,011 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,293 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,587 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:18,891 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:19,208 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:19,535 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:19,880 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:20,221 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:20,564 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:20,913 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:21,264 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:21,623 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:21,992 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:22,364 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:22,744 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:23,129 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:23,520 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:23,917 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:24,324 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:24,739 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:25,157 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:25,579 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:26,013 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:26,449 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:26,894 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:27,358 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:27,815 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:28,273 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:28,740 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:29,216 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:29,698 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:30,186 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:30,683 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:31,194 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:31,701 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:32,221 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:32,744 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:33,276 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:33,813 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:34,373 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:34,921 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:35,463 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:36,015 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:36,586 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:37,157 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:37,739 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:38,327 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:38,918 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:40,017 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:40,644 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:41,275 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:41,943 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:42,579 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:44,114 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:44,771 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:45,440 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:46,106 WARN L194 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:46,757 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:47,413 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:48,103 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:48,823 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:49,530 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:50,238 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:50,962 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:51,694 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:52,431 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:53,171 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:53,925 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:54,688 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:55,458 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:56,224 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:57,031 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 06:46:57,660 INFO L134 CoverageAnalysis]: Checked inductivity of 7114 backedges. 0 proven. 7105 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-11-07 06:46:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1043841687] [2020-11-07 06:46:57,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-11-07 06:46:57,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105] total 105 [2020-11-07 06:46:57,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134757721] [2020-11-07 06:46:57,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 105 states [2020-11-07 06:46:57,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 06:46:57,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2020-11-07 06:46:57,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2707, Invalid=8213, Unknown=0, NotChecked=0, Total=10920 [2020-11-07 06:46:57,663 INFO L87 Difference]: Start difference. First operand 354 states and 359 transitions. Second operand 105 states. [2020-11-07 06:46:59,589 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 06:47:00,267 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 45