/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 -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 01:55:52,778 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-07 01:55:52,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-07 01:55:52,821 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-07 01:55:52,822 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-07 01:55:52,824 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-07 01:55:52,826 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-07 01:55:52,828 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-07 01:55:52,831 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-07 01:55:52,832 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-07 01:55:52,834 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-07 01:55:52,835 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-07 01:55:52,836 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-07 01:55:52,837 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-07 01:55:52,839 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-07 01:55:52,841 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-07 01:55:52,842 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-07 01:55:52,843 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-07 01:55:52,859 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-07 01:55:52,862 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-07 01:55:52,864 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-07 01:55:52,866 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-07 01:55:52,867 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-07 01:55:52,868 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-07 01:55:52,872 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2020-11-07 01:55:52,876 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-07 01:55:52,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-07 01:55:52,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-07 01:55:52,879 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-07 01:55:52,880 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-07 01:55:52,881 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-07 01:55:52,882 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-07 01:55:52,882 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-07 01:55:52,883 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-07 01:55:52,884 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-07 01:55:52,885 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-07 01:55:52,886 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 01:55:52,899 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-07 01:55:52,900 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-07 01:55:52,902 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-07 01:55:52,902 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-07 01:55:52,903 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-07 01:55:52,903 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-07 01:55:52,903 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-07 01:55:52,904 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-07 01:55:52,904 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-07 01:55:52,904 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-07 01:55:52,904 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-07 01:55:52,905 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-07 01:55:52,905 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-07 01:55:52,905 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-07 01:55:52,906 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-07 01:55:52,906 INFO L138 SettingsManager]: * Size of a code block=SingleStatement [2020-11-07 01:55:52,906 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-07 01:55:52,907 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-07 01:55:52,907 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-07 01:55:52,907 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-07 01:55:52,908 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2020-11-07 01:55:52,908 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-07 01:55:52,908 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-07 01:55:53,288 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-07 01:55:53,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-07 01:55:53,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-07 01:55:53,349 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-07 01:55:53,349 INFO L275 PluginConnector]: CDTParser initialized [2020-11-07 01:55:53,350 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-11-07 01:55:53,447 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82458cd5f/5b1ede5d915b4c6d9c6f6d7bc8be6066/FLAG988154f72 [2020-11-07 01:55:54,110 INFO L306 CDTParser]: Found 1 translation units. [2020-11-07 01:55:54,110 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-lopstr16/flag_loopdep.i [2020-11-07 01:55:54,119 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82458cd5f/5b1ede5d915b4c6d9c6f6d7bc8be6066/FLAG988154f72 [2020-11-07 01:55:54,474 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/82458cd5f/5b1ede5d915b4c6d9c6f6d7bc8be6066 [2020-11-07 01:55:54,479 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-07 01:55:54,489 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-11-07 01:55:54,495 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:54,496 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-07 01:55:54,500 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-07 01:55:54,501 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,506 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@730f1b23 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54, skipping insertion in model container [2020-11-07 01:55:54,506 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,516 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-07 01:55:54,538 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-07 01:55:54,772 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:54,782 INFO L203 MainTranslator]: Completed pre-run [2020-11-07 01:55:54,804 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-07 01:55:54,823 INFO L208 MainTranslator]: Completed translation [2020-11-07 01:55:54,823 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54 WrapperNode [2020-11-07 01:55:54,824 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-07 01:55:54,825 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-07 01:55:54,825 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-07 01:55:54,825 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-07 01:55:54,840 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,840 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,849 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,850 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,859 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,865 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,867 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (1/1) ... [2020-11-07 01:55:54,870 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-07 01:55:54,871 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-07 01:55:54,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-07 01:55:54,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-07 01:55:54,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (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 01:55:54,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-11-07 01:55:54,954 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-07 01:55:54,954 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-11-07 01:55:54,954 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-11-07 01:55:54,954 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-11-07 01:55:54,955 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-11-07 01:55:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-11-07 01:55:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-11-07 01:55:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-11-07 01:55:54,955 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-11-07 01:55:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-11-07 01:55:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-07 01:55:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-11-07 01:55:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-11-07 01:55:54,956 INFO L130 BoogieDeclarations]: Found specification of procedure nondet_pointer [2020-11-07 01:55:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-11-07 01:55:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-11-07 01:55:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-11-07 01:55:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-11-07 01:55:54,957 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-11-07 01:55:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-07 01:55:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-11-07 01:55:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-07 01:55:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-07 01:55:54,958 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-07 01:55:54,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-11-07 01:55:55,491 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-07 01:55:55,491 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-11-07 01:55:55,493 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:55 BoogieIcfgContainer [2020-11-07 01:55:55,494 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-07 01:55:55,495 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-07 01:55:55,496 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-07 01:55:55,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-07 01:55:55,500 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 01:55:54" (1/3) ... [2020-11-07 01:55:55,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc8ca2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:55, skipping insertion in model container [2020-11-07 01:55:55,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 01:55:54" (2/3) ... [2020-11-07 01:55:55,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5fc8ca2a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 01:55:55, skipping insertion in model container [2020-11-07 01:55:55,501 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 01:55:55" (3/3) ... [2020-11-07 01:55:55,503 INFO L111 eAbstractionObserver]: Analyzing ICFG flag_loopdep.i [2020-11-07 01:55:55,520 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-11-07 01:55:55,524 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-07 01:55:55,537 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-11-07 01:55:55,564 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-07 01:55:55,564 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-07 01:55:55,564 INFO L379 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2020-11-07 01:55:55,564 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-07 01:55:55,565 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-07 01:55:55,565 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-07 01:55:55,565 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-07 01:55:55,565 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-07 01:55:55,583 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states. [2020-11-07 01:55:55,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-11-07 01:55:55,594 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:55,595 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 01:55:55,595 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:55,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:55,603 INFO L82 PathProgramCache]: Analyzing trace with hash -1175551776, now seen corresponding path program 1 times [2020-11-07 01:55:55,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:55,613 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087640565] [2020-11-07 01:55:55,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:55,701 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:55,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:55,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:55,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,016 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 01:55:56,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087640565] [2020-11-07 01:55:56,021 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,021 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-11-07 01:55:56,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47644045] [2020-11-07 01:55:56,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-07 01:55:56,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-07 01:55:56,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-11-07 01:55:56,048 INFO L87 Difference]: Start difference. First operand 66 states. Second operand 5 states. [2020-11-07 01:55:56,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:56,469 INFO L93 Difference]: Finished difference Result 121 states and 149 transitions. [2020-11-07 01:55:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-07 01:55:56,484 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-11-07 01:55:56,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:56,500 INFO L225 Difference]: With dead ends: 121 [2020-11-07 01:55:56,501 INFO L226 Difference]: Without dead ends: 74 [2020-11-07 01:55:56,513 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 01:55:56,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-07 01:55:56,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 56. [2020-11-07 01:55:56,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-11-07 01:55:56,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-11-07 01:55:56,570 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 35 [2020-11-07 01:55:56,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:56,570 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-11-07 01:55:56,570 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-11-07 01:55:56,571 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-11-07 01:55:56,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-11-07 01:55:56,572 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:56,573 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 01:55:56,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-07 01:55:56,573 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:56,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:56,574 INFO L82 PathProgramCache]: Analyzing trace with hash -69019303, now seen corresponding path program 1 times [2020-11-07 01:55:56,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:56,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581249679] [2020-11-07 01:55:56,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:56,660 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:56,663 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,769 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:56,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:56,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:56,815 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 01:55:56,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581249679] [2020-11-07 01:55:56,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:56,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 01:55:56,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525391444] [2020-11-07 01:55:56,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 01:55:56,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:56,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 01:55:56,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:56,819 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 7 states. [2020-11-07 01:55:57,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,096 INFO L93 Difference]: Finished difference Result 100 states and 111 transitions. [2020-11-07 01:55:57,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-07 01:55:57,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-11-07 01:55:57,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,099 INFO L225 Difference]: With dead ends: 100 [2020-11-07 01:55:57,099 INFO L226 Difference]: Without dead ends: 83 [2020-11-07 01:55:57,101 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 01:55:57,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-11-07 01:55:57,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2020-11-07 01:55:57,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-11-07 01:55:57,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 70 transitions. [2020-11-07 01:55:57,116 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 70 transitions. Word has length 42 [2020-11-07 01:55:57,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:57,116 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 70 transitions. [2020-11-07 01:55:57,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 01:55:57,117 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 70 transitions. [2020-11-07 01:55:57,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-11-07 01:55:57,118 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:57,119 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 01:55:57,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-07 01:55:57,119 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:57,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:57,120 INFO L82 PathProgramCache]: Analyzing trace with hash -532040000, now seen corresponding path program 2 times [2020-11-07 01:55:57,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:57,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124626398] [2020-11-07 01:55:57,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:57,194 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:57,197 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:57,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,275 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:57,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,298 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:57,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,377 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 01:55:57,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124626398] [2020-11-07 01:55:57,378 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:57,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-11-07 01:55:57,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101290603] [2020-11-07 01:55:57,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-07 01:55:57,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:57,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-07 01:55:57,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-11-07 01:55:57,380 INFO L87 Difference]: Start difference. First operand 65 states and 70 transitions. Second operand 7 states. [2020-11-07 01:55:57,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:57,721 INFO L93 Difference]: Finished difference Result 109 states and 119 transitions. [2020-11-07 01:55:57,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-11-07 01:55:57,722 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-11-07 01:55:57,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:57,723 INFO L225 Difference]: With dead ends: 109 [2020-11-07 01:55:57,724 INFO L226 Difference]: Without dead ends: 70 [2020-11-07 01:55:57,725 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 01:55:57,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-07 01:55:57,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-11-07 01:55:57,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-11-07 01:55:57,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-11-07 01:55:57,737 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-11-07 01:55:57,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:57,738 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-11-07 01:55:57,738 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-11-07 01:55:57,738 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-11-07 01:55:57,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-11-07 01:55:57,740 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:57,740 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 01:55:57,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-07 01:55:57,740 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:57,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:57,741 INFO L82 PathProgramCache]: Analyzing trace with hash -661502084, now seen corresponding path program 1 times [2020-11-07 01:55:57,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:57,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932987366] [2020-11-07 01:55:57,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:57,817 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:57,819 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:57,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,905 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:57,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:57,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:57,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,115 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 01:55:58,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932987366] [2020-11-07 01:55:58,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:58,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-11-07 01:55:58,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332553551] [2020-11-07 01:55:58,117 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-07 01:55:58,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:58,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-07 01:55:58,118 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-11-07 01:55:58,118 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-11-07 01:55:58,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:58,501 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2020-11-07 01:55:58,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-07 01:55:58,502 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-11-07 01:55:58,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:58,503 INFO L225 Difference]: With dead ends: 115 [2020-11-07 01:55:58,503 INFO L226 Difference]: Without dead ends: 76 [2020-11-07 01:55:58,505 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 01:55:58,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-07 01:55:58,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 72. [2020-11-07 01:55:58,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-11-07 01:55:58,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 77 transitions. [2020-11-07 01:55:58,517 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 77 transitions. Word has length 55 [2020-11-07 01:55:58,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:58,518 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 77 transitions. [2020-11-07 01:55:58,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-11-07 01:55:58,518 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 77 transitions. [2020-11-07 01:55:58,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-11-07 01:55:58,520 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:58,520 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 01:55:58,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-07 01:55:58,520 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:58,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:58,521 INFO L82 PathProgramCache]: Analyzing trace with hash -717071560, now seen corresponding path program 2 times [2020-11-07 01:55:58,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:58,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2084164377] [2020-11-07 01:55:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:58,701 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:55:58,703 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:55:58,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,787 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:55:58,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:58,908 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:55:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:55:59,201 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 01:55:59,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2084164377] [2020-11-07 01:55:59,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:55:59,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-11-07 01:55:59,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799021830] [2020-11-07 01:55:59,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-07 01:55:59,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:55:59,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-07 01:55:59,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-07 01:55:59,206 INFO L87 Difference]: Start difference. First operand 72 states and 77 transitions. Second operand 11 states. [2020-11-07 01:55:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:55:59,767 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2020-11-07 01:55:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-07 01:55:59,771 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 61 [2020-11-07 01:55:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:55:59,773 INFO L225 Difference]: With dead ends: 121 [2020-11-07 01:55:59,773 INFO L226 Difference]: Without dead ends: 82 [2020-11-07 01:55:59,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-11-07 01:55:59,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-11-07 01:55:59,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2020-11-07 01:55:59,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-11-07 01:55:59,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 83 transitions. [2020-11-07 01:55:59,804 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 83 transitions. Word has length 61 [2020-11-07 01:55:59,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:55:59,805 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 83 transitions. [2020-11-07 01:55:59,805 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-11-07 01:55:59,806 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 83 transitions. [2020-11-07 01:55:59,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-11-07 01:55:59,808 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:55:59,808 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 01:55:59,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-07 01:55:59,810 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:55:59,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:55:59,812 INFO L82 PathProgramCache]: Analyzing trace with hash 2104209908, now seen corresponding path program 3 times [2020-11-07 01:55:59,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:55:59,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908001719] [2020-11-07 01:55:59,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:55:59,998 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:00,001 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:00,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:00,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:00,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:00,506 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 01:56:00,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908001719] [2020-11-07 01:56:00,507 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:00,507 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2020-11-07 01:56:00,507 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886533708] [2020-11-07 01:56:00,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-07 01:56:00,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:00,508 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-07 01:56:00,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-07 01:56:00,509 INFO L87 Difference]: Start difference. First operand 78 states and 83 transitions. Second operand 13 states. [2020-11-07 01:56:01,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:01,106 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2020-11-07 01:56:01,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-07 01:56:01,106 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-11-07 01:56:01,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:01,109 INFO L225 Difference]: With dead ends: 127 [2020-11-07 01:56:01,109 INFO L226 Difference]: Without dead ends: 88 [2020-11-07 01:56:01,110 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=369, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:56:01,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-07 01:56:01,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 84. [2020-11-07 01:56:01,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-11-07 01:56:01,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 89 transitions. [2020-11-07 01:56:01,127 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 89 transitions. Word has length 67 [2020-11-07 01:56:01,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:01,127 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 89 transitions. [2020-11-07 01:56:01,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-11-07 01:56:01,128 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 89 transitions. [2020-11-07 01:56:01,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-11-07 01:56:01,129 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:01,129 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 01:56:01,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-11-07 01:56:01,130 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:01,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:01,130 INFO L82 PathProgramCache]: Analyzing trace with hash -741340240, now seen corresponding path program 4 times [2020-11-07 01:56:01,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:01,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756136646] [2020-11-07 01:56:01,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:01,303 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:01,306 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:01,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:01,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:01,963 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 01:56:01,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756136646] [2020-11-07 01:56:01,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:01,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2020-11-07 01:56:01,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708346963] [2020-11-07 01:56:01,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-07 01:56:01,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:01,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-07 01:56:01,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-11-07 01:56:01,966 INFO L87 Difference]: Start difference. First operand 84 states and 89 transitions. Second operand 15 states. [2020-11-07 01:56:02,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:02,684 INFO L93 Difference]: Finished difference Result 133 states and 143 transitions. [2020-11-07 01:56:02,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-07 01:56:02,687 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 73 [2020-11-07 01:56:02,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:02,689 INFO L225 Difference]: With dead ends: 133 [2020-11-07 01:56:02,689 INFO L226 Difference]: Without dead ends: 94 [2020-11-07 01:56:02,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=191, Invalid=511, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:56:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-11-07 01:56:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2020-11-07 01:56:02,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-11-07 01:56:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 95 transitions. [2020-11-07 01:56:02,724 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 95 transitions. Word has length 73 [2020-11-07 01:56:02,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:02,726 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 95 transitions. [2020-11-07 01:56:02,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-11-07 01:56:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 95 transitions. [2020-11-07 01:56:02,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-11-07 01:56:02,729 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:02,729 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 01:56:02,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-11-07 01:56:02,730 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:02,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:02,733 INFO L82 PathProgramCache]: Analyzing trace with hash -1293866900, now seen corresponding path program 5 times [2020-11-07 01:56:02,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:02,734 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048883442] [2020-11-07 01:56:02,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:02,896 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:02,899 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:02,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,967 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:02,985 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:02,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:03,603 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 01:56:03,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048883442] [2020-11-07 01:56:03,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:03,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2020-11-07 01:56:03,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140797651] [2020-11-07 01:56:03,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-07 01:56:03,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:03,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-07 01:56:03,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-11-07 01:56:03,606 INFO L87 Difference]: Start difference. First operand 90 states and 95 transitions. Second operand 17 states. [2020-11-07 01:56:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:04,456 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2020-11-07 01:56:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-07 01:56:04,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 79 [2020-11-07 01:56:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:04,458 INFO L225 Difference]: With dead ends: 139 [2020-11-07 01:56:04,459 INFO L226 Difference]: Without dead ends: 100 [2020-11-07 01:56:04,460 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:56:04,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-07 01:56:04,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-11-07 01:56:04,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-11-07 01:56:04,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 101 transitions. [2020-11-07 01:56:04,478 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 101 transitions. Word has length 79 [2020-11-07 01:56:04,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:04,479 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 101 transitions. [2020-11-07 01:56:04,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-11-07 01:56:04,479 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 101 transitions. [2020-11-07 01:56:04,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-11-07 01:56:04,481 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:04,481 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 01:56:04,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-11-07 01:56:04,481 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:04,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:04,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1220593704, now seen corresponding path program 6 times [2020-11-07 01:56:04,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:04,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248420238] [2020-11-07 01:56:04,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:04,655 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:04,657 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:04,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:04,782 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:04,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:05,524 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 01:56:05,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248420238] [2020-11-07 01:56:05,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:05,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2020-11-07 01:56:05,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379560893] [2020-11-07 01:56:05,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-07 01:56:05,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:05,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-07 01:56:05,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2020-11-07 01:56:05,527 INFO L87 Difference]: Start difference. First operand 96 states and 101 transitions. Second operand 19 states. [2020-11-07 01:56:06,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:06,458 INFO L93 Difference]: Finished difference Result 145 states and 155 transitions. [2020-11-07 01:56:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-07 01:56:06,459 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 85 [2020-11-07 01:56:06,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:06,462 INFO L225 Difference]: With dead ends: 145 [2020-11-07 01:56:06,462 INFO L226 Difference]: Without dead ends: 106 [2020-11-07 01:56:06,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:56:06,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-07 01:56:06,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2020-11-07 01:56:06,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-11-07 01:56:06,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-11-07 01:56:06,488 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 85 [2020-11-07 01:56:06,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:06,489 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-11-07 01:56:06,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-11-07 01:56:06,490 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-11-07 01:56:06,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-11-07 01:56:06,491 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:06,492 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 01:56:06,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-11-07 01:56:06,492 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:06,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:06,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1824478492, now seen corresponding path program 7 times [2020-11-07 01:56:06,494 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:06,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412148291] [2020-11-07 01:56:06,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:06,660 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:06,662 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:06,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:06,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:06,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:06,759 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:06,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:07,579 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 01:56:07,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412148291] [2020-11-07 01:56:07,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:07,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2020-11-07 01:56:07,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655430620] [2020-11-07 01:56:07,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-07 01:56:07,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:07,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-07 01:56:07,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-11-07 01:56:07,582 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 21 states. [2020-11-07 01:56:08,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:08,695 INFO L93 Difference]: Finished difference Result 151 states and 161 transitions. [2020-11-07 01:56:08,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-11-07 01:56:08,696 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 91 [2020-11-07 01:56:08,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:08,697 INFO L225 Difference]: With dead ends: 151 [2020-11-07 01:56:08,697 INFO L226 Difference]: Without dead ends: 112 [2020-11-07 01:56:08,702 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=413, Invalid=1069, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:56:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-11-07 01:56:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2020-11-07 01:56:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-11-07 01:56:08,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 113 transitions. [2020-11-07 01:56:08,717 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 113 transitions. Word has length 91 [2020-11-07 01:56:08,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:08,718 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 113 transitions. [2020-11-07 01:56:08,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-11-07 01:56:08,718 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 113 transitions. [2020-11-07 01:56:08,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-11-07 01:56:08,719 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:08,719 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 01:56:08,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-11-07 01:56:08,720 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:08,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:08,720 INFO L82 PathProgramCache]: Analyzing trace with hash -605908832, now seen corresponding path program 8 times [2020-11-07 01:56:08,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:08,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536201777] [2020-11-07 01:56:08,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:08,880 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:08,885 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:08,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:08,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:08,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:09,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:10,035 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 01:56:10,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536201777] [2020-11-07 01:56:10,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:10,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2020-11-07 01:56:10,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209845029] [2020-11-07 01:56:10,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-07 01:56:10,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:10,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-07 01:56:10,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-11-07 01:56:10,037 INFO L87 Difference]: Start difference. First operand 108 states and 113 transitions. Second operand 23 states. [2020-11-07 01:56:11,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:11,220 INFO L93 Difference]: Finished difference Result 157 states and 167 transitions. [2020-11-07 01:56:11,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-07 01:56:11,221 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 97 [2020-11-07 01:56:11,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:11,222 INFO L225 Difference]: With dead ends: 157 [2020-11-07 01:56:11,223 INFO L226 Difference]: Without dead ends: 118 [2020-11-07 01:56:11,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=507, Invalid=1299, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:56:11,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-07 01:56:11,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2020-11-07 01:56:11,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-11-07 01:56:11,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 119 transitions. [2020-11-07 01:56:11,239 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 119 transitions. Word has length 97 [2020-11-07 01:56:11,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:11,240 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 119 transitions. [2020-11-07 01:56:11,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-11-07 01:56:11,240 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 119 transitions. [2020-11-07 01:56:11,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-11-07 01:56:11,241 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:11,241 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 01:56:11,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-11-07 01:56:11,242 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:11,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:11,242 INFO L82 PathProgramCache]: Analyzing trace with hash 869808476, now seen corresponding path program 9 times [2020-11-07 01:56:11,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:11,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528753127] [2020-11-07 01:56:11,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:11,414 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:11,416 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:11,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:11,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:11,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:11,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:11,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:12,552 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 01:56:12,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528753127] [2020-11-07 01:56:12,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:12,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2020-11-07 01:56:12,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714761391] [2020-11-07 01:56:12,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-07 01:56:12,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:12,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-07 01:56:12,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=453, Unknown=0, NotChecked=0, Total=600 [2020-11-07 01:56:12,554 INFO L87 Difference]: Start difference. First operand 114 states and 119 transitions. Second operand 25 states. [2020-11-07 01:56:13,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:13,885 INFO L93 Difference]: Finished difference Result 163 states and 173 transitions. [2020-11-07 01:56:13,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-07 01:56:13,886 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 103 [2020-11-07 01:56:13,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:13,888 INFO L225 Difference]: With dead ends: 163 [2020-11-07 01:56:13,888 INFO L226 Difference]: Without dead ends: 124 [2020-11-07 01:56:13,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=611, Invalid=1551, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:56:13,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-11-07 01:56:13,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 120. [2020-11-07 01:56:13,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-11-07 01:56:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 125 transitions. [2020-11-07 01:56:13,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 125 transitions. Word has length 103 [2020-11-07 01:56:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:13,905 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 125 transitions. [2020-11-07 01:56:13,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-11-07 01:56:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 125 transitions. [2020-11-07 01:56:13,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-11-07 01:56:13,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:13,906 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 01:56:13,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-11-07 01:56:13,907 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:13,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:13,908 INFO L82 PathProgramCache]: Analyzing trace with hash -268212968, now seen corresponding path program 10 times [2020-11-07 01:56:13,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:13,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [791324223] [2020-11-07 01:56:13,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:14,092 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:14,094 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:14,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:14,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:14,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:14,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:14,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:15,360 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 01:56:15,360 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [791324223] [2020-11-07 01:56:15,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:15,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2020-11-07 01:56:15,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316983844] [2020-11-07 01:56:15,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-11-07 01:56:15,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:15,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-11-07 01:56:15,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-11-07 01:56:15,362 INFO L87 Difference]: Start difference. First operand 120 states and 125 transitions. Second operand 27 states. [2020-11-07 01:56:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:17,008 INFO L93 Difference]: Finished difference Result 169 states and 179 transitions. [2020-11-07 01:56:17,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-07 01:56:17,008 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 109 [2020-11-07 01:56:17,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:17,010 INFO L225 Difference]: With dead ends: 169 [2020-11-07 01:56:17,011 INFO L226 Difference]: Without dead ends: 130 [2020-11-07 01:56:17,012 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=725, Invalid=1825, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 01:56:17,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-11-07 01:56:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2020-11-07 01:56:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-11-07 01:56:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 131 transitions. [2020-11-07 01:56:17,027 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 131 transitions. Word has length 109 [2020-11-07 01:56:17,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:17,027 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 131 transitions. [2020-11-07 01:56:17,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-11-07 01:56:17,028 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 131 transitions. [2020-11-07 01:56:17,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-11-07 01:56:17,029 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:17,029 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 01:56:17,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-11-07 01:56:17,030 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:17,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:17,030 INFO L82 PathProgramCache]: Analyzing trace with hash 620090324, now seen corresponding path program 11 times [2020-11-07 01:56:17,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:17,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809033346] [2020-11-07 01:56:17,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:17,209 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:17,211 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:17,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:17,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:17,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:17,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:17,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:18,681 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 01:56:18,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809033346] [2020-11-07 01:56:18,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:18,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2020-11-07 01:56:18,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713559368] [2020-11-07 01:56:18,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-11-07 01:56:18,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:18,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-11-07 01:56:18,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=613, Unknown=0, NotChecked=0, Total=812 [2020-11-07 01:56:18,683 INFO L87 Difference]: Start difference. First operand 126 states and 131 transitions. Second operand 29 states. [2020-11-07 01:56:20,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:20,362 INFO L93 Difference]: Finished difference Result 175 states and 185 transitions. [2020-11-07 01:56:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-11-07 01:56:20,363 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 115 [2020-11-07 01:56:20,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:20,365 INFO L225 Difference]: With dead ends: 175 [2020-11-07 01:56:20,365 INFO L226 Difference]: Without dead ends: 136 [2020-11-07 01:56:20,367 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 498 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=849, Invalid=2121, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 01:56:20,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-07 01:56:20,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2020-11-07 01:56:20,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-11-07 01:56:20,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 137 transitions. [2020-11-07 01:56:20,384 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 137 transitions. Word has length 115 [2020-11-07 01:56:20,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:20,384 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 137 transitions. [2020-11-07 01:56:20,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-11-07 01:56:20,384 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 137 transitions. [2020-11-07 01:56:20,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-11-07 01:56:20,386 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:20,386 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 01:56:20,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-11-07 01:56:20,386 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:20,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:20,387 INFO L82 PathProgramCache]: Analyzing trace with hash 586237328, now seen corresponding path program 12 times [2020-11-07 01:56:20,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:20,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466517885] [2020-11-07 01:56:20,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:20,567 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:20,569 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:20,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:20,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:20,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:20,688 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:20,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:22,135 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 01:56:22,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466517885] [2020-11-07 01:56:22,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:22,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2020-11-07 01:56:22,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142830955] [2020-11-07 01:56:22,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-11-07 01:56:22,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:22,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-11-07 01:56:22,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=702, Unknown=0, NotChecked=0, Total=930 [2020-11-07 01:56:22,138 INFO L87 Difference]: Start difference. First operand 132 states and 137 transitions. Second operand 31 states. [2020-11-07 01:56:24,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:24,033 INFO L93 Difference]: Finished difference Result 181 states and 191 transitions. [2020-11-07 01:56:24,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-07 01:56:24,034 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-11-07 01:56:24,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:24,036 INFO L225 Difference]: With dead ends: 181 [2020-11-07 01:56:24,036 INFO L226 Difference]: Without dead ends: 142 [2020-11-07 01:56:24,040 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 579 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=983, Invalid=2439, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 01:56:24,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-11-07 01:56:24,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2020-11-07 01:56:24,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-11-07 01:56:24,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 143 transitions. [2020-11-07 01:56:24,054 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 143 transitions. Word has length 121 [2020-11-07 01:56:24,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:24,055 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 143 transitions. [2020-11-07 01:56:24,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-11-07 01:56:24,055 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 143 transitions. [2020-11-07 01:56:24,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-11-07 01:56:24,056 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:24,057 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 01:56:24,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-11-07 01:56:24,057 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:24,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -236488116, now seen corresponding path program 13 times [2020-11-07 01:56:24,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:24,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [320707474] [2020-11-07 01:56:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:24,226 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:24,228 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:24,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:24,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:24,315 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:24,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:26,095 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 01:56:26,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [320707474] [2020-11-07 01:56:26,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:26,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2020-11-07 01:56:26,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14138080] [2020-11-07 01:56:26,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-11-07 01:56:26,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:26,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-11-07 01:56:26,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=797, Unknown=0, NotChecked=0, Total=1056 [2020-11-07 01:56:26,103 INFO L87 Difference]: Start difference. First operand 138 states and 143 transitions. Second operand 33 states. [2020-11-07 01:56:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:28,072 INFO L93 Difference]: Finished difference Result 187 states and 197 transitions. [2020-11-07 01:56:28,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-11-07 01:56:28,073 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 127 [2020-11-07 01:56:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:28,074 INFO L225 Difference]: With dead ends: 187 [2020-11-07 01:56:28,074 INFO L226 Difference]: Without dead ends: 148 [2020-11-07 01:56:28,076 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=1127, Invalid=2779, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 01:56:28,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-11-07 01:56:28,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2020-11-07 01:56:28,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-11-07 01:56:28,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2020-11-07 01:56:28,095 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 127 [2020-11-07 01:56:28,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:28,096 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2020-11-07 01:56:28,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-11-07 01:56:28,096 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2020-11-07 01:56:28,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-11-07 01:56:28,098 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:28,098 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 01:56:28,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-11-07 01:56:28,098 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:28,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:28,099 INFO L82 PathProgramCache]: Analyzing trace with hash -847629816, now seen corresponding path program 14 times [2020-11-07 01:56:28,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:28,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [303501899] [2020-11-07 01:56:28,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:28,284 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:28,286 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:28,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:28,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:28,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:30,103 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 01:56:30,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [303501899] [2020-11-07 01:56:30,104 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:30,104 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2020-11-07 01:56:30,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378896165] [2020-11-07 01:56:30,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-11-07 01:56:30,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:30,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-11-07 01:56:30,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=898, Unknown=0, NotChecked=0, Total=1190 [2020-11-07 01:56:30,105 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand 35 states. [2020-11-07 01:56:32,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:32,616 INFO L93 Difference]: Finished difference Result 193 states and 203 transitions. [2020-11-07 01:56:32,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-11-07 01:56:32,617 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 133 [2020-11-07 01:56:32,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:32,618 INFO L225 Difference]: With dead ends: 193 [2020-11-07 01:56:32,618 INFO L226 Difference]: Without dead ends: 154 [2020-11-07 01:56:32,620 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 759 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1281, Invalid=3141, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 01:56:32,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-11-07 01:56:32,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2020-11-07 01:56:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-11-07 01:56:32,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 155 transitions. [2020-11-07 01:56:32,636 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 155 transitions. Word has length 133 [2020-11-07 01:56:32,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:32,636 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 155 transitions. [2020-11-07 01:56:32,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-11-07 01:56:32,636 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 155 transitions. [2020-11-07 01:56:32,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-11-07 01:56:32,638 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:32,638 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 01:56:32,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-11-07 01:56:32,639 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:32,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:32,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1594151740, now seen corresponding path program 15 times [2020-11-07 01:56:32,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:32,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1764569648] [2020-11-07 01:56:32,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:32,820 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:32,821 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:32,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:32,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:32,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:32,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:35,031 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 01:56:35,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1764569648] [2020-11-07 01:56:35,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:35,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2020-11-07 01:56:35,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974191512] [2020-11-07 01:56:35,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-11-07 01:56:35,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:35,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-11-07 01:56:35,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=1005, Unknown=0, NotChecked=0, Total=1332 [2020-11-07 01:56:35,034 INFO L87 Difference]: Start difference. First operand 150 states and 155 transitions. Second operand 37 states. [2020-11-07 01:56:37,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:37,807 INFO L93 Difference]: Finished difference Result 199 states and 209 transitions. [2020-11-07 01:56:37,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-11-07 01:56:37,808 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 139 [2020-11-07 01:56:37,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:37,809 INFO L225 Difference]: With dead ends: 199 [2020-11-07 01:56:37,809 INFO L226 Difference]: Without dead ends: 160 [2020-11-07 01:56:37,812 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 858 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1445, Invalid=3525, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:56:37,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-11-07 01:56:37,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 156. [2020-11-07 01:56:37,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-11-07 01:56:37,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 161 transitions. [2020-11-07 01:56:37,833 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 161 transitions. Word has length 139 [2020-11-07 01:56:37,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:37,834 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 161 transitions. [2020-11-07 01:56:37,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-11-07 01:56:37,834 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 161 transitions. [2020-11-07 01:56:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-11-07 01:56:37,836 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:37,836 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 01:56:37,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-11-07 01:56:37,836 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:37,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:37,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2090063232, now seen corresponding path program 16 times [2020-11-07 01:56:37,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:37,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224219929] [2020-11-07 01:56:37,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:38,004 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:38,005 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:38,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:38,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:38,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:38,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:38,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:40,431 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 01:56:40,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224219929] [2020-11-07 01:56:40,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:40,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2020-11-07 01:56:40,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839861704] [2020-11-07 01:56:40,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-11-07 01:56:40,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:40,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-11-07 01:56:40,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=364, Invalid=1118, Unknown=0, NotChecked=0, Total=1482 [2020-11-07 01:56:40,434 INFO L87 Difference]: Start difference. First operand 156 states and 161 transitions. Second operand 39 states. [2020-11-07 01:56:43,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:43,121 INFO L93 Difference]: Finished difference Result 205 states and 215 transitions. [2020-11-07 01:56:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-11-07 01:56:43,122 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 145 [2020-11-07 01:56:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:43,123 INFO L225 Difference]: With dead ends: 205 [2020-11-07 01:56:43,123 INFO L226 Difference]: Without dead ends: 166 [2020-11-07 01:56:43,126 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=1619, Invalid=3931, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 01:56:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-11-07 01:56:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2020-11-07 01:56:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-11-07 01:56:43,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 167 transitions. [2020-11-07 01:56:43,144 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 167 transitions. Word has length 145 [2020-11-07 01:56:43,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:43,144 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 167 transitions. [2020-11-07 01:56:43,144 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-11-07 01:56:43,144 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 167 transitions. [2020-11-07 01:56:43,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-11-07 01:56:43,146 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:43,146 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 01:56:43,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-11-07 01:56:43,146 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:43,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:43,147 INFO L82 PathProgramCache]: Analyzing trace with hash 863955772, now seen corresponding path program 17 times [2020-11-07 01:56:43,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:43,147 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683278655] [2020-11-07 01:56:43,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:43,332 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:43,333 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:43,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:43,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:43,434 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:43,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:45,961 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 01:56:45,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683278655] [2020-11-07 01:56:45,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:45,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2020-11-07 01:56:45,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298187360] [2020-11-07 01:56:45,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-11-07 01:56:45,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:45,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-11-07 01:56:45,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=1237, Unknown=0, NotChecked=0, Total=1640 [2020-11-07 01:56:45,963 INFO L87 Difference]: Start difference. First operand 162 states and 167 transitions. Second operand 41 states. [2020-11-07 01:56:48,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:48,741 INFO L93 Difference]: Finished difference Result 211 states and 221 transitions. [2020-11-07 01:56:48,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-11-07 01:56:48,742 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 151 [2020-11-07 01:56:48,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:48,744 INFO L225 Difference]: With dead ends: 211 [2020-11-07 01:56:48,744 INFO L226 Difference]: Without dead ends: 172 [2020-11-07 01:56:48,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1074 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=1803, Invalid=4359, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 01:56:48,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-11-07 01:56:48,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 168. [2020-11-07 01:56:48,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-11-07 01:56:48,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 173 transitions. [2020-11-07 01:56:48,765 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 173 transitions. Word has length 151 [2020-11-07 01:56:48,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:48,765 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 173 transitions. [2020-11-07 01:56:48,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-11-07 01:56:48,766 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 173 transitions. [2020-11-07 01:56:48,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-11-07 01:56:48,766 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:48,767 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 01:56:48,767 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-11-07 01:56:48,767 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:48,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:48,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1818939656, now seen corresponding path program 18 times [2020-11-07 01:56:48,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:48,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229151008] [2020-11-07 01:56:48,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:48,941 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:48,943 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:48,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:49,040 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:49,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:49,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:51,814 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 01:56:51,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229151008] [2020-11-07 01:56:51,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:51,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2020-11-07 01:56:51,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622419448] [2020-11-07 01:56:51,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-11-07 01:56:51,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:51,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-11-07 01:56:51,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=444, Invalid=1362, Unknown=0, NotChecked=0, Total=1806 [2020-11-07 01:56:51,817 INFO L87 Difference]: Start difference. First operand 168 states and 173 transitions. Second operand 43 states. [2020-11-07 01:56:55,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:56:55,014 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2020-11-07 01:56:55,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-11-07 01:56:55,015 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 157 [2020-11-07 01:56:55,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:56:55,017 INFO L225 Difference]: With dead ends: 217 [2020-11-07 01:56:55,017 INFO L226 Difference]: Without dead ends: 178 [2020-11-07 01:56:55,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=1997, Invalid=4809, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 01:56:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-11-07 01:56:55,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2020-11-07 01:56:55,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-11-07 01:56:55,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 179 transitions. [2020-11-07 01:56:55,039 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 179 transitions. Word has length 157 [2020-11-07 01:56:55,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:56:55,039 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 179 transitions. [2020-11-07 01:56:55,039 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-11-07 01:56:55,039 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 179 transitions. [2020-11-07 01:56:55,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-11-07 01:56:55,040 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:56:55,040 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 01:56:55,041 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-11-07 01:56:55,041 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:56:55,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:56:55,041 INFO L82 PathProgramCache]: Analyzing trace with hash 633386420, now seen corresponding path program 19 times [2020-11-07 01:56:55,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:56:55,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239622141] [2020-11-07 01:56:55,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:56:55,220 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:56:55,222 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:56:55,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:55,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:56:55,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:55,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:56:55,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:56:58,469 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 01:56:58,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239622141] [2020-11-07 01:56:58,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:56:58,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2020-11-07 01:56:58,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396391824] [2020-11-07 01:56:58,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-11-07 01:56:58,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:56:58,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-11-07 01:56:58,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=487, Invalid=1493, Unknown=0, NotChecked=0, Total=1980 [2020-11-07 01:56:58,471 INFO L87 Difference]: Start difference. First operand 174 states and 179 transitions. Second operand 45 states. [2020-11-07 01:57:01,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:01,924 INFO L93 Difference]: Finished difference Result 223 states and 233 transitions. [2020-11-07 01:57:01,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-11-07 01:57:01,928 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 163 [2020-11-07 01:57:01,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:01,929 INFO L225 Difference]: With dead ends: 223 [2020-11-07 01:57:01,929 INFO L226 Difference]: Without dead ends: 184 [2020-11-07 01:57:01,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1314 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=2201, Invalid=5281, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 01:57:01,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-11-07 01:57:01,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 180. [2020-11-07 01:57:01,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-11-07 01:57:01,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 185 transitions. [2020-11-07 01:57:01,951 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 185 transitions. Word has length 163 [2020-11-07 01:57:01,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:01,952 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 185 transitions. [2020-11-07 01:57:01,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-11-07 01:57:01,952 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 185 transitions. [2020-11-07 01:57:01,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-11-07 01:57:01,953 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:01,953 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 01:57:01,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-11-07 01:57:01,954 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:01,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:01,954 INFO L82 PathProgramCache]: Analyzing trace with hash -2017247376, now seen corresponding path program 20 times [2020-11-07 01:57:01,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:01,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [166878081] [2020-11-07 01:57:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:02,133 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:02,134 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:02,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:02,230 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:02,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:02,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:05,540 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 01:57:05,540 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [166878081] [2020-11-07 01:57:05,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:05,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2020-11-07 01:57:05,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2045789675] [2020-11-07 01:57:05,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-11-07 01:57:05,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:05,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-11-07 01:57:05,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=532, Invalid=1630, Unknown=0, NotChecked=0, Total=2162 [2020-11-07 01:57:05,544 INFO L87 Difference]: Start difference. First operand 180 states and 185 transitions. Second operand 47 states. [2020-11-07 01:57:09,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:09,347 INFO L93 Difference]: Finished difference Result 229 states and 239 transitions. [2020-11-07 01:57:09,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-11-07 01:57:09,348 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 169 [2020-11-07 01:57:09,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:09,349 INFO L225 Difference]: With dead ends: 229 [2020-11-07 01:57:09,349 INFO L226 Difference]: Without dead ends: 190 [2020-11-07 01:57:09,350 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1443 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=2415, Invalid=5775, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 01:57:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-11-07 01:57:09,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2020-11-07 01:57:09,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-11-07 01:57:09,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 191 transitions. [2020-11-07 01:57:09,372 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 191 transitions. Word has length 169 [2020-11-07 01:57:09,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:09,372 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 191 transitions. [2020-11-07 01:57:09,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-11-07 01:57:09,372 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 191 transitions. [2020-11-07 01:57:09,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-11-07 01:57:09,373 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:09,373 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 01:57:09,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-11-07 01:57:09,373 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:09,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:09,374 INFO L82 PathProgramCache]: Analyzing trace with hash -284259284, now seen corresponding path program 21 times [2020-11-07 01:57:09,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:09,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538654658] [2020-11-07 01:57:09,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:09,544 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:09,545 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:09,638 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:09,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:09,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:09,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:13,233 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 01:57:13,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538654658] [2020-11-07 01:57:13,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:13,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2020-11-07 01:57:13,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110492820] [2020-11-07 01:57:13,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-11-07 01:57:13,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:13,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-11-07 01:57:13,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=579, Invalid=1773, Unknown=0, NotChecked=0, Total=2352 [2020-11-07 01:57:13,235 INFO L87 Difference]: Start difference. First operand 186 states and 191 transitions. Second operand 49 states. [2020-11-07 01:57:17,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:17,129 INFO L93 Difference]: Finished difference Result 235 states and 245 transitions. [2020-11-07 01:57:17,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-11-07 01:57:17,130 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 175 [2020-11-07 01:57:17,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:17,132 INFO L225 Difference]: With dead ends: 235 [2020-11-07 01:57:17,132 INFO L226 Difference]: Without dead ends: 196 [2020-11-07 01:57:17,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1578 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2639, Invalid=6291, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 01:57:17,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-11-07 01:57:17,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 192. [2020-11-07 01:57:17,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-11-07 01:57:17,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 197 transitions. [2020-11-07 01:57:17,162 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 197 transitions. Word has length 175 [2020-11-07 01:57:17,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:17,163 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 197 transitions. [2020-11-07 01:57:17,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-11-07 01:57:17,163 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 197 transitions. [2020-11-07 01:57:17,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-11-07 01:57:17,164 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:17,165 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 01:57:17,165 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-11-07 01:57:17,165 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:17,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:17,165 INFO L82 PathProgramCache]: Analyzing trace with hash -1530635288, now seen corresponding path program 22 times [2020-11-07 01:57:17,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:17,166 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621213560] [2020-11-07 01:57:17,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:17,341 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:17,344 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:17,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,437 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:17,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:17,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:17,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:21,294 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 01:57:21,294 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621213560] [2020-11-07 01:57:21,295 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:21,295 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2020-11-07 01:57:21,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231172953] [2020-11-07 01:57:21,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-11-07 01:57:21,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:21,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-11-07 01:57:21,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=628, Invalid=1922, Unknown=0, NotChecked=0, Total=2550 [2020-11-07 01:57:21,297 INFO L87 Difference]: Start difference. First operand 192 states and 197 transitions. Second operand 51 states. [2020-11-07 01:57:25,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:25,686 INFO L93 Difference]: Finished difference Result 241 states and 251 transitions. [2020-11-07 01:57:25,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2020-11-07 01:57:25,687 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 181 [2020-11-07 01:57:25,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:25,689 INFO L225 Difference]: With dead ends: 241 [2020-11-07 01:57:25,690 INFO L226 Difference]: Without dead ends: 202 [2020-11-07 01:57:25,692 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1719 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=2873, Invalid=6829, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 01:57:25,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-11-07 01:57:25,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2020-11-07 01:57:25,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-11-07 01:57:25,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 203 transitions. [2020-11-07 01:57:25,718 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 203 transitions. Word has length 181 [2020-11-07 01:57:25,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:25,719 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 203 transitions. [2020-11-07 01:57:25,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-11-07 01:57:25,719 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 203 transitions. [2020-11-07 01:57:25,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-11-07 01:57:25,720 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:25,720 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 01:57:25,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-11-07 01:57:25,721 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:25,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:25,721 INFO L82 PathProgramCache]: Analyzing trace with hash -2118750556, now seen corresponding path program 23 times [2020-11-07 01:57:25,721 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:25,722 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359635017] [2020-11-07 01:57:25,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:25,909 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:25,910 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:25,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:26,017 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:26,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:26,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:26,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:30,244 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 01:57:30,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359635017] [2020-11-07 01:57:30,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:30,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2020-11-07 01:57:30,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264308057] [2020-11-07 01:57:30,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-11-07 01:57:30,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:30,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-11-07 01:57:30,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=679, Invalid=2077, Unknown=0, NotChecked=0, Total=2756 [2020-11-07 01:57:30,247 INFO L87 Difference]: Start difference. First operand 198 states and 203 transitions. Second operand 53 states. [2020-11-07 01:57:35,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:35,023 INFO L93 Difference]: Finished difference Result 247 states and 257 transitions. [2020-11-07 01:57:35,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2020-11-07 01:57:35,024 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 187 [2020-11-07 01:57:35,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:35,026 INFO L225 Difference]: With dead ends: 247 [2020-11-07 01:57:35,026 INFO L226 Difference]: Without dead ends: 208 [2020-11-07 01:57:35,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1866 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=3117, Invalid=7389, Unknown=0, NotChecked=0, Total=10506 [2020-11-07 01:57:35,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-11-07 01:57:35,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 204. [2020-11-07 01:57:35,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-11-07 01:57:35,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 209 transitions. [2020-11-07 01:57:35,065 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 209 transitions. Word has length 187 [2020-11-07 01:57:35,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:35,065 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 209 transitions. [2020-11-07 01:57:35,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-11-07 01:57:35,065 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 209 transitions. [2020-11-07 01:57:35,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-11-07 01:57:35,067 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:35,067 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 01:57:35,067 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-11-07 01:57:35,067 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:35,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:35,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1785103456, now seen corresponding path program 24 times [2020-11-07 01:57:35,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:35,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1082606256] [2020-11-07 01:57:35,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:35,260 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:35,262 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,362 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:35,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:35,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:39,849 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 01:57:39,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1082606256] [2020-11-07 01:57:39,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:39,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2020-11-07 01:57:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223564280] [2020-11-07 01:57:39,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-11-07 01:57:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:39,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-11-07 01:57:39,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=732, Invalid=2238, Unknown=0, NotChecked=0, Total=2970 [2020-11-07 01:57:39,851 INFO L87 Difference]: Start difference. First operand 204 states and 209 transitions. Second operand 55 states. [2020-11-07 01:57:45,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:45,183 INFO L93 Difference]: Finished difference Result 253 states and 263 transitions. [2020-11-07 01:57:45,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2020-11-07 01:57:45,184 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 193 [2020-11-07 01:57:45,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:45,187 INFO L225 Difference]: With dead ends: 253 [2020-11-07 01:57:45,187 INFO L226 Difference]: Without dead ends: 214 [2020-11-07 01:57:45,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=3371, Invalid=7971, Unknown=0, NotChecked=0, Total=11342 [2020-11-07 01:57:45,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-11-07 01:57:45,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2020-11-07 01:57:45,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-11-07 01:57:45,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 215 transitions. [2020-11-07 01:57:45,216 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 215 transitions. Word has length 193 [2020-11-07 01:57:45,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:45,217 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 215 transitions. [2020-11-07 01:57:45,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-11-07 01:57:45,217 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 215 transitions. [2020-11-07 01:57:45,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-11-07 01:57:45,218 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:45,218 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 01:57:45,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-11-07 01:57:45,218 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:45,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:45,219 INFO L82 PathProgramCache]: Analyzing trace with hash -888775396, now seen corresponding path program 25 times [2020-11-07 01:57:45,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:45,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736037381] [2020-11-07 01:57:45,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:45,393 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:45,394 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:45,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:45,501 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:45,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:45,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:50,316 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 01:57:50,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736037381] [2020-11-07 01:57:50,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:57:50,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2020-11-07 01:57:50,317 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653312029] [2020-11-07 01:57:50,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-11-07 01:57:50,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:57:50,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-11-07 01:57:50,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=787, Invalid=2405, Unknown=0, NotChecked=0, Total=3192 [2020-11-07 01:57:50,318 INFO L87 Difference]: Start difference. First operand 210 states and 215 transitions. Second operand 57 states. [2020-11-07 01:57:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:57:55,608 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2020-11-07 01:57:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2020-11-07 01:57:55,609 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 199 [2020-11-07 01:57:55,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:57:55,611 INFO L225 Difference]: With dead ends: 259 [2020-11-07 01:57:55,612 INFO L226 Difference]: Without dead ends: 220 [2020-11-07 01:57:55,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2178 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3635, Invalid=8575, Unknown=0, NotChecked=0, Total=12210 [2020-11-07 01:57:55,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-11-07 01:57:55,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 216. [2020-11-07 01:57:55,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-11-07 01:57:55,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 221 transitions. [2020-11-07 01:57:55,664 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 221 transitions. Word has length 199 [2020-11-07 01:57:55,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:57:55,665 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 221 transitions. [2020-11-07 01:57:55,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-11-07 01:57:55,665 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 221 transitions. [2020-11-07 01:57:55,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-11-07 01:57:55,666 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:57:55,667 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 01:57:55,667 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-11-07 01:57:55,667 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:57:55,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:57:55,667 INFO L82 PathProgramCache]: Analyzing trace with hash 326613208, now seen corresponding path program 26 times [2020-11-07 01:57:55,668 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:57:55,668 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2026435453] [2020-11-07 01:57:55,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:57:55,850 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:57:55,851 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:57:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:55,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:57:55,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:57:55,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:57:56,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:01,219 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 01:58:01,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2026435453] [2020-11-07 01:58:01,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:01,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2020-11-07 01:58:01,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99308508] [2020-11-07 01:58:01,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-11-07 01:58:01,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:01,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-11-07 01:58:01,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=844, Invalid=2578, Unknown=0, NotChecked=0, Total=3422 [2020-11-07 01:58:01,222 INFO L87 Difference]: Start difference. First operand 216 states and 221 transitions. Second operand 59 states. [2020-11-07 01:58:07,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:07,104 INFO L93 Difference]: Finished difference Result 265 states and 275 transitions. [2020-11-07 01:58:07,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2020-11-07 01:58:07,105 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 205 [2020-11-07 01:58:07,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:07,107 INFO L225 Difference]: With dead ends: 265 [2020-11-07 01:58:07,107 INFO L226 Difference]: Without dead ends: 226 [2020-11-07 01:58:07,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2343 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3909, Invalid=9201, Unknown=0, NotChecked=0, Total=13110 [2020-11-07 01:58:07,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-11-07 01:58:07,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 222. [2020-11-07 01:58:07,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-11-07 01:58:07,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 227 transitions. [2020-11-07 01:58:07,147 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 227 transitions. Word has length 205 [2020-11-07 01:58:07,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:07,148 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 227 transitions. [2020-11-07 01:58:07,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-11-07 01:58:07,148 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 227 transitions. [2020-11-07 01:58:07,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-11-07 01:58:07,149 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:07,149 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 01:58:07,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-11-07 01:58:07,150 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:07,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:07,150 INFO L82 PathProgramCache]: Analyzing trace with hash 860641172, now seen corresponding path program 27 times [2020-11-07 01:58:07,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:07,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [736699821] [2020-11-07 01:58:07,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:07,354 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:07,356 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:07,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:07,474 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:07,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:07,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:07,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:13,204 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 01:58:13,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [736699821] [2020-11-07 01:58:13,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:13,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2020-11-07 01:58:13,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610624728] [2020-11-07 01:58:13,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-11-07 01:58:13,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:13,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-11-07 01:58:13,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=2757, Unknown=0, NotChecked=0, Total=3660 [2020-11-07 01:58:13,206 INFO L87 Difference]: Start difference. First operand 222 states and 227 transitions. Second operand 61 states. [2020-11-07 01:58:19,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:19,723 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2020-11-07 01:58:19,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2020-11-07 01:58:19,724 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 211 [2020-11-07 01:58:19,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:19,728 INFO L225 Difference]: With dead ends: 271 [2020-11-07 01:58:19,728 INFO L226 Difference]: Without dead ends: 232 [2020-11-07 01:58:19,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2514 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=4193, Invalid=9849, Unknown=0, NotChecked=0, Total=14042 [2020-11-07 01:58:19,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-11-07 01:58:19,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 228. [2020-11-07 01:58:19,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-11-07 01:58:19,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 233 transitions. [2020-11-07 01:58:19,783 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 233 transitions. Word has length 211 [2020-11-07 01:58:19,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:19,783 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 233 transitions. [2020-11-07 01:58:19,783 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-11-07 01:58:19,784 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 233 transitions. [2020-11-07 01:58:19,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-11-07 01:58:19,785 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:19,785 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 01:58:19,786 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-11-07 01:58:19,786 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:19,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:19,786 INFO L82 PathProgramCache]: Analyzing trace with hash 365295952, now seen corresponding path program 28 times [2020-11-07 01:58:19,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:19,787 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1068632862] [2020-11-07 01:58:19,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:19,999 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:20,001 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:20,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:20,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:20,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:20,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:26,219 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 01:58:26,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1068632862] [2020-11-07 01:58:26,219 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:26,219 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2020-11-07 01:58:26,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107069337] [2020-11-07 01:58:26,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-11-07 01:58:26,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:26,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-11-07 01:58:26,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=964, Invalid=2942, Unknown=0, NotChecked=0, Total=3906 [2020-11-07 01:58:26,221 INFO L87 Difference]: Start difference. First operand 228 states and 233 transitions. Second operand 63 states. [2020-11-07 01:58:33,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:33,075 INFO L93 Difference]: Finished difference Result 277 states and 287 transitions. [2020-11-07 01:58:33,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2020-11-07 01:58:33,076 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 217 [2020-11-07 01:58:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:33,078 INFO L225 Difference]: With dead ends: 277 [2020-11-07 01:58:33,078 INFO L226 Difference]: Without dead ends: 238 [2020-11-07 01:58:33,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2691 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=4487, Invalid=10519, Unknown=0, NotChecked=0, Total=15006 [2020-11-07 01:58:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-11-07 01:58:33,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 234. [2020-11-07 01:58:33,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-11-07 01:58:33,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 239 transitions. [2020-11-07 01:58:33,125 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 239 transitions. Word has length 217 [2020-11-07 01:58:33,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:33,126 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 239 transitions. [2020-11-07 01:58:33,126 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-11-07 01:58:33,126 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 239 transitions. [2020-11-07 01:58:33,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-11-07 01:58:33,127 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:33,128 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 01:58:33,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-11-07 01:58:33,128 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:33,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:33,128 INFO L82 PathProgramCache]: Analyzing trace with hash 500588044, now seen corresponding path program 29 times [2020-11-07 01:58:33,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:33,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205285010] [2020-11-07 01:58:33,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:33,348 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:33,350 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:33,473 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:33,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:33,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:33,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:40,171 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 01:58:40,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205285010] [2020-11-07 01:58:40,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:40,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2020-11-07 01:58:40,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275689721] [2020-11-07 01:58:40,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 65 states [2020-11-07 01:58:40,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:40,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2020-11-07 01:58:40,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1027, Invalid=3133, Unknown=0, NotChecked=0, Total=4160 [2020-11-07 01:58:40,174 INFO L87 Difference]: Start difference. First operand 234 states and 239 transitions. Second operand 65 states. [2020-11-07 01:58:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:58:47,540 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2020-11-07 01:58:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2020-11-07 01:58:47,542 INFO L78 Accepts]: Start accepts. Automaton has 65 states. Word has length 223 [2020-11-07 01:58:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:58:47,544 INFO L225 Difference]: With dead ends: 283 [2020-11-07 01:58:47,544 INFO L226 Difference]: Without dead ends: 244 [2020-11-07 01:58:47,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=4791, Invalid=11211, Unknown=0, NotChecked=0, Total=16002 [2020-11-07 01:58:47,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-11-07 01:58:47,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2020-11-07 01:58:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-11-07 01:58:47,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 245 transitions. [2020-11-07 01:58:47,593 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 245 transitions. Word has length 223 [2020-11-07 01:58:47,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:58:47,594 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 245 transitions. [2020-11-07 01:58:47,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 65 states. [2020-11-07 01:58:47,594 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 245 transitions. [2020-11-07 01:58:47,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-11-07 01:58:47,595 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:58:47,595 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 01:58:47,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-11-07 01:58:47,595 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:58:47,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:58:47,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1575008824, now seen corresponding path program 30 times [2020-11-07 01:58:47,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:58:47,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066969611] [2020-11-07 01:58:47,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:58:47,774 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:58:47,776 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:58:47,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:58:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:47,926 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:58:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:58:55,139 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 01:58:55,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066969611] [2020-11-07 01:58:55,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:58:55,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2020-11-07 01:58:55,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611572918] [2020-11-07 01:58:55,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 67 states [2020-11-07 01:58:55,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:58:55,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2020-11-07 01:58:55,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=3330, Unknown=0, NotChecked=0, Total=4422 [2020-11-07 01:58:55,141 INFO L87 Difference]: Start difference. First operand 240 states and 245 transitions. Second operand 67 states. [2020-11-07 01:59:03,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:03,293 INFO L93 Difference]: Finished difference Result 289 states and 299 transitions. [2020-11-07 01:59:03,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2020-11-07 01:59:03,299 INFO L78 Accepts]: Start accepts. Automaton has 67 states. Word has length 229 [2020-11-07 01:59:03,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:03,301 INFO L225 Difference]: With dead ends: 289 [2020-11-07 01:59:03,301 INFO L226 Difference]: Without dead ends: 250 [2020-11-07 01:59:03,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3063 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5105, Invalid=11925, Unknown=0, NotChecked=0, Total=17030 [2020-11-07 01:59:03,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-11-07 01:59:03,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 246. [2020-11-07 01:59:03,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-11-07 01:59:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 251 transitions. [2020-11-07 01:59:03,361 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 251 transitions. Word has length 229 [2020-11-07 01:59:03,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:03,362 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 251 transitions. [2020-11-07 01:59:03,362 INFO L482 AbstractCegarLoop]: Interpolant automaton has 67 states. [2020-11-07 01:59:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 251 transitions. [2020-11-07 01:59:03,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-11-07 01:59:03,363 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:03,363 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 01:59:03,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-11-07 01:59:03,364 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:03,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:03,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1760718980, now seen corresponding path program 31 times [2020-11-07 01:59:03,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:03,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164646323] [2020-11-07 01:59:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:03,560 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:03,561 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:03,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:03,689 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:03,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:03,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:10,768 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 01:59:10,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164646323] [2020-11-07 01:59:10,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:10,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2020-11-07 01:59:10,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165708590] [2020-11-07 01:59:10,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 69 states [2020-11-07 01:59:10,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2020-11-07 01:59:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=3533, Unknown=0, NotChecked=0, Total=4692 [2020-11-07 01:59:10,771 INFO L87 Difference]: Start difference. First operand 246 states and 251 transitions. Second operand 69 states. [2020-11-07 01:59:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:18,789 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2020-11-07 01:59:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2020-11-07 01:59:18,790 INFO L78 Accepts]: Start accepts. Automaton has 69 states. Word has length 235 [2020-11-07 01:59:18,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:18,792 INFO L225 Difference]: With dead ends: 295 [2020-11-07 01:59:18,792 INFO L226 Difference]: Without dead ends: 256 [2020-11-07 01:59:18,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=5429, Invalid=12661, Unknown=0, NotChecked=0, Total=18090 [2020-11-07 01:59:18,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2020-11-07 01:59:18,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 252. [2020-11-07 01:59:18,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-11-07 01:59:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 257 transitions. [2020-11-07 01:59:18,870 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 257 transitions. Word has length 235 [2020-11-07 01:59:18,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:18,870 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 257 transitions. [2020-11-07 01:59:18,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 69 states. [2020-11-07 01:59:18,870 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 257 transitions. [2020-11-07 01:59:18,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-11-07 01:59:18,872 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:18,872 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 01:59:18,872 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-11-07 01:59:18,872 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:18,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 609328704, now seen corresponding path program 32 times [2020-11-07 01:59:18,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:18,873 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661633156] [2020-11-07 01:59:18,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:19,073 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:19,074 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:19,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:19,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:19,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:19,232 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:19,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:26,861 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 01:59:26,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661633156] [2020-11-07 01:59:26,862 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:26,862 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2020-11-07 01:59:26,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680861459] [2020-11-07 01:59:26,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 71 states [2020-11-07 01:59:26,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:26,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2020-11-07 01:59:26,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1228, Invalid=3742, Unknown=0, NotChecked=0, Total=4970 [2020-11-07 01:59:26,863 INFO L87 Difference]: Start difference. First operand 252 states and 257 transitions. Second operand 71 states. [2020-11-07 01:59:36,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:36,047 INFO L93 Difference]: Finished difference Result 301 states and 311 transitions. [2020-11-07 01:59:36,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2020-11-07 01:59:36,048 INFO L78 Accepts]: Start accepts. Automaton has 71 states. Word has length 241 [2020-11-07 01:59:36,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:36,050 INFO L225 Difference]: With dead ends: 301 [2020-11-07 01:59:36,051 INFO L226 Difference]: Without dead ends: 262 [2020-11-07 01:59:36,053 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3459 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=5763, Invalid=13419, Unknown=0, NotChecked=0, Total=19182 [2020-11-07 01:59:36,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-11-07 01:59:36,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 258. [2020-11-07 01:59:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-11-07 01:59:36,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 263 transitions. [2020-11-07 01:59:36,108 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 263 transitions. Word has length 241 [2020-11-07 01:59:36,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:36,108 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 263 transitions. [2020-11-07 01:59:36,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 71 states. [2020-11-07 01:59:36,108 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 263 transitions. [2020-11-07 01:59:36,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-11-07 01:59:36,110 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:36,110 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 01:59:36,110 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-11-07 01:59:36,110 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:36,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:36,111 INFO L82 PathProgramCache]: Analyzing trace with hash -303132932, now seen corresponding path program 33 times [2020-11-07 01:59:36,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:36,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [960300003] [2020-11-07 01:59:36,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:36,313 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:36,314 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:36,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:36,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:36,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:36,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:44,742 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 01:59:44,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [960300003] [2020-11-07 01:59:44,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 01:59:44,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2020-11-07 01:59:44,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115866194] [2020-11-07 01:59:44,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 73 states [2020-11-07 01:59:44,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 01:59:44,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2020-11-07 01:59:44,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=3957, Unknown=0, NotChecked=0, Total=5256 [2020-11-07 01:59:44,744 INFO L87 Difference]: Start difference. First operand 258 states and 263 transitions. Second operand 73 states. [2020-11-07 01:59:54,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 01:59:54,910 INFO L93 Difference]: Finished difference Result 307 states and 317 transitions. [2020-11-07 01:59:54,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2020-11-07 01:59:54,912 INFO L78 Accepts]: Start accepts. Automaton has 73 states. Word has length 247 [2020-11-07 01:59:54,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 01:59:54,915 INFO L225 Difference]: With dead ends: 307 [2020-11-07 01:59:54,915 INFO L226 Difference]: Without dead ends: 268 [2020-11-07 01:59:54,918 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3666 ImplicationChecksByTransitivity, 16.0s TimeCoverageRelationStatistics Valid=6107, Invalid=14199, Unknown=0, NotChecked=0, Total=20306 [2020-11-07 01:59:54,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-11-07 01:59:54,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 264. [2020-11-07 01:59:54,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-11-07 01:59:54,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 269 transitions. [2020-11-07 01:59:54,980 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 269 transitions. Word has length 247 [2020-11-07 01:59:54,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 01:59:54,980 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 269 transitions. [2020-11-07 01:59:54,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 73 states. [2020-11-07 01:59:54,981 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 269 transitions. [2020-11-07 01:59:54,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-11-07 01:59:54,982 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 01:59:54,983 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 01:59:54,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-11-07 01:59:54,983 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 01:59:54,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 01:59:54,984 INFO L82 PathProgramCache]: Analyzing trace with hash -1020591432, now seen corresponding path program 34 times [2020-11-07 01:59:54,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 01:59:54,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372672562] [2020-11-07 01:59:54,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 01:59:55,202 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 01:59:55,204 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 01:59:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:55,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 01:59:55,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 01:59:55,370 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 01:59:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:04,251 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 02:00:04,251 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372672562] [2020-11-07 02:00:04,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:04,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2020-11-07 02:00:04,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99935177] [2020-11-07 02:00:04,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-11-07 02:00:04,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:04,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-11-07 02:00:04,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1372, Invalid=4178, Unknown=0, NotChecked=0, Total=5550 [2020-11-07 02:00:04,253 INFO L87 Difference]: Start difference. First operand 264 states and 269 transitions. Second operand 75 states. [2020-11-07 02:00:14,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:14,290 INFO L93 Difference]: Finished difference Result 313 states and 323 transitions. [2020-11-07 02:00:14,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2020-11-07 02:00:14,292 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 253 [2020-11-07 02:00:14,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:14,294 INFO L225 Difference]: With dead ends: 313 [2020-11-07 02:00:14,294 INFO L226 Difference]: Without dead ends: 274 [2020-11-07 02:00:14,296 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3879 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=6461, Invalid=15001, Unknown=0, NotChecked=0, Total=21462 [2020-11-07 02:00:14,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2020-11-07 02:00:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 270. [2020-11-07 02:00:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 270 states. [2020-11-07 02:00:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 275 transitions. [2020-11-07 02:00:14,352 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 275 transitions. Word has length 253 [2020-11-07 02:00:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:14,352 INFO L481 AbstractCegarLoop]: Abstraction has 270 states and 275 transitions. [2020-11-07 02:00:14,352 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-11-07 02:00:14,352 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 275 transitions. [2020-11-07 02:00:14,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-11-07 02:00:14,354 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:14,354 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 02:00:14,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-11-07 02:00:14,355 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:14,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:14,355 INFO L82 PathProgramCache]: Analyzing trace with hash 18397556, now seen corresponding path program 35 times [2020-11-07 02:00:14,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:14,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472979266] [2020-11-07 02:00:14,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:14,567 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:14,568 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:14,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:14,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:14,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:14,725 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:00:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:24,484 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 02:00:24,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472979266] [2020-11-07 02:00:24,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:24,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2020-11-07 02:00:24,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778100930] [2020-11-07 02:00:24,485 INFO L461 AbstractCegarLoop]: Interpolant automaton has 77 states [2020-11-07 02:00:24,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:24,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2020-11-07 02:00:24,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1447, Invalid=4405, Unknown=0, NotChecked=0, Total=5852 [2020-11-07 02:00:24,487 INFO L87 Difference]: Start difference. First operand 270 states and 275 transitions. Second operand 77 states. [2020-11-07 02:00:36,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:36,126 INFO L93 Difference]: Finished difference Result 319 states and 329 transitions. [2020-11-07 02:00:36,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2020-11-07 02:00:36,128 INFO L78 Accepts]: Start accepts. Automaton has 77 states. Word has length 259 [2020-11-07 02:00:36,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:36,131 INFO L225 Difference]: With dead ends: 319 [2020-11-07 02:00:36,131 INFO L226 Difference]: Without dead ends: 280 [2020-11-07 02:00:36,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4098 ImplicationChecksByTransitivity, 19.0s TimeCoverageRelationStatistics Valid=6825, Invalid=15825, Unknown=0, NotChecked=0, Total=22650 [2020-11-07 02:00:36,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-11-07 02:00:36,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 276. [2020-11-07 02:00:36,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-11-07 02:00:36,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 281 transitions. [2020-11-07 02:00:36,194 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 281 transitions. Word has length 259 [2020-11-07 02:00:36,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:36,194 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 281 transitions. [2020-11-07 02:00:36,194 INFO L482 AbstractCegarLoop]: Interpolant automaton has 77 states. [2020-11-07 02:00:36,194 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 281 transitions. [2020-11-07 02:00:36,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-11-07 02:00:36,196 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:36,197 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 02:00:36,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-11-07 02:00:36,198 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:36,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:36,198 INFO L82 PathProgramCache]: Analyzing trace with hash -528911568, now seen corresponding path program 36 times [2020-11-07 02:00:36,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:36,199 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1933874396] [2020-11-07 02:00:36,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:36,428 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:36,430 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:36,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:36,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:36,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:36,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:00:36,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:46,915 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 02:00:46,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1933874396] [2020-11-07 02:00:46,916 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:00:46,916 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2020-11-07 02:00:46,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815130954] [2020-11-07 02:00:46,917 INFO L461 AbstractCegarLoop]: Interpolant automaton has 79 states [2020-11-07 02:00:46,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:00:46,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2020-11-07 02:00:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1524, Invalid=4638, Unknown=0, NotChecked=0, Total=6162 [2020-11-07 02:00:46,918 INFO L87 Difference]: Start difference. First operand 276 states and 281 transitions. Second operand 79 states. [2020-11-07 02:00:59,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:00:59,471 INFO L93 Difference]: Finished difference Result 325 states and 335 transitions. [2020-11-07 02:00:59,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2020-11-07 02:00:59,472 INFO L78 Accepts]: Start accepts. Automaton has 79 states. Word has length 265 [2020-11-07 02:00:59,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:00:59,474 INFO L225 Difference]: With dead ends: 325 [2020-11-07 02:00:59,474 INFO L226 Difference]: Without dead ends: 286 [2020-11-07 02:00:59,476 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4323 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=7199, Invalid=16671, Unknown=0, NotChecked=0, Total=23870 [2020-11-07 02:00:59,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-11-07 02:00:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 282. [2020-11-07 02:00:59,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 282 states. [2020-11-07 02:00:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 282 states to 282 states and 287 transitions. [2020-11-07 02:00:59,541 INFO L78 Accepts]: Start accepts. Automaton has 282 states and 287 transitions. Word has length 265 [2020-11-07 02:00:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:00:59,542 INFO L481 AbstractCegarLoop]: Abstraction has 282 states and 287 transitions. [2020-11-07 02:00:59,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 79 states. [2020-11-07 02:00:59,542 INFO L276 IsEmpty]: Start isEmpty. Operand 282 states and 287 transitions. [2020-11-07 02:00:59,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-11-07 02:00:59,544 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:00:59,544 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 02:00:59,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-11-07 02:00:59,544 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:00:59,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:00:59,545 INFO L82 PathProgramCache]: Analyzing trace with hash -239144980, now seen corresponding path program 37 times [2020-11-07 02:00:59,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:00:59,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [36001413] [2020-11-07 02:00:59,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:00:59,777 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:00:59,779 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:00:59,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:59,923 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:00:59,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:00:59,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:00:59,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:11,738 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 02:01:11,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [36001413] [2020-11-07 02:01:11,739 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:11,739 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2020-11-07 02:01:11,739 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195339518] [2020-11-07 02:01:11,739 INFO L461 AbstractCegarLoop]: Interpolant automaton has 81 states [2020-11-07 02:01:11,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:11,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2020-11-07 02:01:11,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1603, Invalid=4877, Unknown=0, NotChecked=0, Total=6480 [2020-11-07 02:01:11,740 INFO L87 Difference]: Start difference. First operand 282 states and 287 transitions. Second operand 81 states. [2020-11-07 02:01:26,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:26,005 INFO L93 Difference]: Finished difference Result 331 states and 341 transitions. [2020-11-07 02:01:26,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2020-11-07 02:01:26,007 INFO L78 Accepts]: Start accepts. Automaton has 81 states. Word has length 271 [2020-11-07 02:01:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:26,009 INFO L225 Difference]: With dead ends: 331 [2020-11-07 02:01:26,009 INFO L226 Difference]: Without dead ends: 292 [2020-11-07 02:01:26,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4554 ImplicationChecksByTransitivity, 23.2s TimeCoverageRelationStatistics Valid=7583, Invalid=17539, Unknown=0, NotChecked=0, Total=25122 [2020-11-07 02:01:26,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-11-07 02:01:26,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 288. [2020-11-07 02:01:26,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-11-07 02:01:26,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 293 transitions. [2020-11-07 02:01:26,072 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 293 transitions. Word has length 271 [2020-11-07 02:01:26,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:26,073 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 293 transitions. [2020-11-07 02:01:26,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 81 states. [2020-11-07 02:01:26,073 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 293 transitions. [2020-11-07 02:01:26,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2020-11-07 02:01:26,074 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:26,075 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 02:01:26,075 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-11-07 02:01:26,075 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:26,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:26,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1727336536, now seen corresponding path program 38 times [2020-11-07 02:01:26,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:26,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687384709] [2020-11-07 02:01:26,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:26,355 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:26,357 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:26,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:26,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:26,513 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:01:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:39,356 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 02:01:39,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687384709] [2020-11-07 02:01:39,356 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:01:39,356 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2020-11-07 02:01:39,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834698818] [2020-11-07 02:01:39,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 83 states [2020-11-07 02:01:39,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:01:39,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2020-11-07 02:01:39,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1684, Invalid=5122, Unknown=0, NotChecked=0, Total=6806 [2020-11-07 02:01:39,358 INFO L87 Difference]: Start difference. First operand 288 states and 293 transitions. Second operand 83 states. [2020-11-07 02:01:54,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:01:54,169 INFO L93 Difference]: Finished difference Result 337 states and 347 transitions. [2020-11-07 02:01:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2020-11-07 02:01:54,171 INFO L78 Accepts]: Start accepts. Automaton has 83 states. Word has length 277 [2020-11-07 02:01:54,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:01:54,174 INFO L225 Difference]: With dead ends: 337 [2020-11-07 02:01:54,174 INFO L226 Difference]: Without dead ends: 298 [2020-11-07 02:01:54,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4791 ImplicationChecksByTransitivity, 25.6s TimeCoverageRelationStatistics Valid=7977, Invalid=18429, Unknown=0, NotChecked=0, Total=26406 [2020-11-07 02:01:54,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2020-11-07 02:01:54,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 294. [2020-11-07 02:01:54,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2020-11-07 02:01:54,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2020-11-07 02:01:54,253 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 277 [2020-11-07 02:01:54,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:01:54,253 INFO L481 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2020-11-07 02:01:54,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 83 states. [2020-11-07 02:01:54,254 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2020-11-07 02:01:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2020-11-07 02:01:54,256 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:01:54,256 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 02:01:54,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-11-07 02:01:54,257 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:01:54,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:01:54,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1976618396, now seen corresponding path program 39 times [2020-11-07 02:01:54,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:01:54,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731896290] [2020-11-07 02:01:54,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:01:54,600 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:01:54,601 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:01:54,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:54,771 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:01:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:01:54,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:01:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:09,588 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 02:02:09,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731896290] [2020-11-07 02:02:09,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:09,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2020-11-07 02:02:09,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833917553] [2020-11-07 02:02:09,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 85 states [2020-11-07 02:02:09,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:09,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2020-11-07 02:02:09,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=5373, Unknown=0, NotChecked=0, Total=7140 [2020-11-07 02:02:09,590 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand 85 states. [2020-11-07 02:02:26,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:02:26,457 INFO L93 Difference]: Finished difference Result 343 states and 353 transitions. [2020-11-07 02:02:26,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2020-11-07 02:02:26,461 INFO L78 Accepts]: Start accepts. Automaton has 85 states. Word has length 283 [2020-11-07 02:02:26,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:02:26,463 INFO L225 Difference]: With dead ends: 343 [2020-11-07 02:02:26,463 INFO L226 Difference]: Without dead ends: 304 [2020-11-07 02:02:26,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5034 ImplicationChecksByTransitivity, 29.2s TimeCoverageRelationStatistics Valid=8381, Invalid=19341, Unknown=0, NotChecked=0, Total=27722 [2020-11-07 02:02:26,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-11-07 02:02:26,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 300. [2020-11-07 02:02:26,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 300 states. [2020-11-07 02:02:26,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 305 transitions. [2020-11-07 02:02:26,565 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 305 transitions. Word has length 283 [2020-11-07 02:02:26,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:02:26,565 INFO L481 AbstractCegarLoop]: Abstraction has 300 states and 305 transitions. [2020-11-07 02:02:26,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 85 states. [2020-11-07 02:02:26,565 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 305 transitions. [2020-11-07 02:02:26,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2020-11-07 02:02:26,567 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:02:26,567 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 02:02:26,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-11-07 02:02:26,568 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:02:26,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:02:26,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1152219168, now seen corresponding path program 40 times [2020-11-07 02:02:26,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:02:26,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191521343] [2020-11-07 02:02:26,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:02:26,840 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:02:26,841 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:02:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:27,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:02:27,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:27,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:02:27,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:02:44,267 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 02:02:44,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191521343] [2020-11-07 02:02:44,269 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:02:44,269 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2020-11-07 02:02:44,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895314216] [2020-11-07 02:02:44,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 87 states [2020-11-07 02:02:44,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:02:44,270 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2020-11-07 02:02:44,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1852, Invalid=5630, Unknown=0, NotChecked=0, Total=7482 [2020-11-07 02:02:44,270 INFO L87 Difference]: Start difference. First operand 300 states and 305 transitions. Second operand 87 states. [2020-11-07 02:03:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:03,686 INFO L93 Difference]: Finished difference Result 349 states and 359 transitions. [2020-11-07 02:03:03,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2020-11-07 02:03:03,688 INFO L78 Accepts]: Start accepts. Automaton has 87 states. Word has length 289 [2020-11-07 02:03:03,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:03,691 INFO L225 Difference]: With dead ends: 349 [2020-11-07 02:03:03,691 INFO L226 Difference]: Without dead ends: 310 [2020-11-07 02:03:03,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5283 ImplicationChecksByTransitivity, 34.1s TimeCoverageRelationStatistics Valid=8795, Invalid=20275, Unknown=0, NotChecked=0, Total=29070 [2020-11-07 02:03:03,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2020-11-07 02:03:03,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2020-11-07 02:03:03,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-11-07 02:03:03,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 311 transitions. [2020-11-07 02:03:03,784 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 311 transitions. Word has length 289 [2020-11-07 02:03:03,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:03,788 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 311 transitions. [2020-11-07 02:03:03,788 INFO L482 AbstractCegarLoop]: Interpolant automaton has 87 states. [2020-11-07 02:03:03,789 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 311 transitions. [2020-11-07 02:03:03,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2020-11-07 02:03:03,791 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:03,791 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 02:03:03,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-11-07 02:03:03,792 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:03,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:03,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1883799332, now seen corresponding path program 41 times [2020-11-07 02:03:03,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:03,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078332189] [2020-11-07 02:03:03,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:04,083 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:04,085 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:04,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:04,258 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:04,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:03:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:24,545 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 02:03:24,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078332189] [2020-11-07 02:03:24,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:03:24,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2020-11-07 02:03:24,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826053374] [2020-11-07 02:03:24,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 89 states [2020-11-07 02:03:24,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:03:24,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2020-11-07 02:03:24,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1939, Invalid=5893, Unknown=0, NotChecked=0, Total=7832 [2020-11-07 02:03:24,548 INFO L87 Difference]: Start difference. First operand 306 states and 311 transitions. Second operand 89 states. [2020-11-07 02:03:46,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:03:46,359 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2020-11-07 02:03:46,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2020-11-07 02:03:46,362 INFO L78 Accepts]: Start accepts. Automaton has 89 states. Word has length 295 [2020-11-07 02:03:46,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:03:46,364 INFO L225 Difference]: With dead ends: 355 [2020-11-07 02:03:46,364 INFO L226 Difference]: Without dead ends: 316 [2020-11-07 02:03:46,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5538 ImplicationChecksByTransitivity, 40.0s TimeCoverageRelationStatistics Valid=9219, Invalid=21231, Unknown=0, NotChecked=0, Total=30450 [2020-11-07 02:03:46,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316 states. [2020-11-07 02:03:46,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316 to 312. [2020-11-07 02:03:46,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 312 states. [2020-11-07 02:03:46,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 317 transitions. [2020-11-07 02:03:46,434 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 317 transitions. Word has length 295 [2020-11-07 02:03:46,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:03:46,434 INFO L481 AbstractCegarLoop]: Abstraction has 312 states and 317 transitions. [2020-11-07 02:03:46,434 INFO L482 AbstractCegarLoop]: Interpolant automaton has 89 states. [2020-11-07 02:03:46,434 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 317 transitions. [2020-11-07 02:03:46,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-11-07 02:03:46,436 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:03:46,436 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 02:03:46,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-11-07 02:03:46,436 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:03:46,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:03:46,436 INFO L82 PathProgramCache]: Analyzing trace with hash -164688744, now seen corresponding path program 42 times [2020-11-07 02:03:46,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:03:46,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326606892] [2020-11-07 02:03:46,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:03:46,726 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:03:46,727 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:03:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:46,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:03:46,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:03:46,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:03:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:10,838 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 02:04:10,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326606892] [2020-11-07 02:04:10,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:04:10,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2020-11-07 02:04:10,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063505811] [2020-11-07 02:04:10,840 INFO L461 AbstractCegarLoop]: Interpolant automaton has 91 states [2020-11-07 02:04:10,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:04:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2020-11-07 02:04:10,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2028, Invalid=6162, Unknown=0, NotChecked=0, Total=8190 [2020-11-07 02:04:10,841 INFO L87 Difference]: Start difference. First operand 312 states and 317 transitions. Second operand 91 states. [2020-11-07 02:04:12,763 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 02:04:39,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:04:39,436 INFO L93 Difference]: Finished difference Result 361 states and 371 transitions. [2020-11-07 02:04:39,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2020-11-07 02:04:39,441 INFO L78 Accepts]: Start accepts. Automaton has 91 states. Word has length 301 [2020-11-07 02:04:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:04:39,443 INFO L225 Difference]: With dead ends: 361 [2020-11-07 02:04:39,443 INFO L226 Difference]: Without dead ends: 322 [2020-11-07 02:04:39,447 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5799 ImplicationChecksByTransitivity, 47.3s TimeCoverageRelationStatistics Valid=9653, Invalid=22209, Unknown=0, NotChecked=0, Total=31862 [2020-11-07 02:04:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2020-11-07 02:04:39,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 318. [2020-11-07 02:04:39,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 318 states. [2020-11-07 02:04:39,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 323 transitions. [2020-11-07 02:04:39,565 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 323 transitions. Word has length 301 [2020-11-07 02:04:39,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:04:39,565 INFO L481 AbstractCegarLoop]: Abstraction has 318 states and 323 transitions. [2020-11-07 02:04:39,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 91 states. [2020-11-07 02:04:39,566 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 323 transitions. [2020-11-07 02:04:39,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-11-07 02:04:39,568 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:04:39,569 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 02:04:39,569 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-11-07 02:04:39,569 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:04:39,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:04:39,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1118165844, now seen corresponding path program 43 times [2020-11-07 02:04:39,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:04:39,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [876805134] [2020-11-07 02:04:39,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:04:39,682 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:04:39,940 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:04:39,942 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:04:39,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:04:40,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:04:40,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:04:40,526 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:40,678 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:40,844 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:41,008 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:41,186 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:41,360 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:41,531 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:47,959 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:04:53,863 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:01,423 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:01,857 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:02,349 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:09,251 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 02:05:09,252 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [876805134] [2020-11-07 02:05:09,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:05:09,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2020-11-07 02:05:09,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434511998] [2020-11-07 02:05:09,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 93 states [2020-11-07 02:05:09,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:05:09,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2020-11-07 02:05:09,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2119, Invalid=6437, Unknown=0, NotChecked=0, Total=8556 [2020-11-07 02:05:09,254 INFO L87 Difference]: Start difference. First operand 318 states and 323 transitions. Second operand 93 states. [2020-11-07 02:05:11,151 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 02:05:42,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:05:42,198 INFO L93 Difference]: Finished difference Result 367 states and 377 transitions. [2020-11-07 02:05:42,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2020-11-07 02:05:42,202 INFO L78 Accepts]: Start accepts. Automaton has 93 states. Word has length 307 [2020-11-07 02:05:42,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:05:42,204 INFO L225 Difference]: With dead ends: 367 [2020-11-07 02:05:42,204 INFO L226 Difference]: Without dead ends: 328 [2020-11-07 02:05:42,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6066 ImplicationChecksByTransitivity, 57.0s TimeCoverageRelationStatistics Valid=10097, Invalid=23209, Unknown=0, NotChecked=0, Total=33306 [2020-11-07 02:05:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2020-11-07 02:05:42,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2020-11-07 02:05:42,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-11-07 02:05:42,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 329 transitions. [2020-11-07 02:05:42,298 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 329 transitions. Word has length 307 [2020-11-07 02:05:42,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:05:42,298 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 329 transitions. [2020-11-07 02:05:42,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 93 states. [2020-11-07 02:05:42,299 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 329 transitions. [2020-11-07 02:05:42,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 314 [2020-11-07 02:05:42,306 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:05:42,306 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 02:05:42,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-11-07 02:05:42,306 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:05:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:05:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash -77746928, now seen corresponding path program 44 times [2020-11-07 02:05:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:05:42,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815538169] [2020-11-07 02:05:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:05:42,426 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:05:42,635 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:05:42,738 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:05:42,740 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:05:42,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:42,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:05:42,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:42,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:05:43,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:05:43,330 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:43,471 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:43,742 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:43,895 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,221 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,392 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,574 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,762 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:44,955 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:45,149 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:45,350 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:45,562 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:46,205 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:47,732 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:48,013 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:48,295 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:48,590 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:48,883 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:49,183 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:49,483 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:49,793 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:50,106 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:50,419 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:50,748 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:51,083 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:51,423 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:51,770 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:52,112 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:52,469 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:53,820 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:54,209 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:54,604 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:54,992 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:55,386 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:55,789 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:56,192 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:57,000 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:57,416 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:57,837 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:58,270 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:58,707 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:59,146 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:05:59,605 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:00,505 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:00,959 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:01,412 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:02,775 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:03,234 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:03,686 WARN L194 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:05,189 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:06,252 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:06,774 WARN L194 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:07,323 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:07,872 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:08,427 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:11,000 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:11,609 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:12,221 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:12,839 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:13,473 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:14,108 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:14,736 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:15,372 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:16,013 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:16,639 WARN L194 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:17,122 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 02:06:17,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815538169] [2020-11-07 02:06:17,123 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:06:17,123 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2020-11-07 02:06:17,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506559281] [2020-11-07 02:06:17,124 INFO L461 AbstractCegarLoop]: Interpolant automaton has 95 states [2020-11-07 02:06:17,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:06:17,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2020-11-07 02:06:17,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2212, Invalid=6718, Unknown=0, NotChecked=0, Total=8930 [2020-11-07 02:06:17,125 INFO L87 Difference]: Start difference. First operand 324 states and 329 transitions. Second operand 95 states. [2020-11-07 02:06:19,081 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 02:06:19,638 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 02:06:57,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:06:57,531 INFO L93 Difference]: Finished difference Result 373 states and 383 transitions. [2020-11-07 02:06:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2020-11-07 02:06:57,536 INFO L78 Accepts]: Start accepts. Automaton has 95 states. Word has length 313 [2020-11-07 02:06:57,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:06:57,539 INFO L225 Difference]: With dead ends: 373 [2020-11-07 02:06:57,539 INFO L226 Difference]: Without dead ends: 334 [2020-11-07 02:06:57,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6339 ImplicationChecksByTransitivity, 67.8s TimeCoverageRelationStatistics Valid=10551, Invalid=24231, Unknown=0, NotChecked=0, Total=34782 [2020-11-07 02:06:57,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-11-07 02:06:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 330. [2020-11-07 02:06:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 330 states. [2020-11-07 02:06:57,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 335 transitions. [2020-11-07 02:06:57,627 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 335 transitions. Word has length 313 [2020-11-07 02:06:57,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:06:57,628 INFO L481 AbstractCegarLoop]: Abstraction has 330 states and 335 transitions. [2020-11-07 02:06:57,628 INFO L482 AbstractCegarLoop]: Interpolant automaton has 95 states. [2020-11-07 02:06:57,628 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 335 transitions. [2020-11-07 02:06:57,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-11-07 02:06:57,631 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:06:57,631 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 02:06:57,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-11-07 02:06:57,631 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:06:57,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:06:57,632 INFO L82 PathProgramCache]: Analyzing trace with hash -565689908, now seen corresponding path program 45 times [2020-11-07 02:06:57,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:06:57,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797121816] [2020-11-07 02:06:57,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:06:57,792 WARN L194 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:06:57,904 WARN L194 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 02:06:58,021 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:06:58,134 WARN L194 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2020-11-07 02:06:58,139 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:06:58,141 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:06:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:58,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:06:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:58,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:06:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:06:58,755 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:58,919 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:59,087 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:59,268 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:59,454 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:59,625 WARN L194 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:06:59,825 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:00,025 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:00,244 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:00,453 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:00,672 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:00,896 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:01,101 WARN L194 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:01,339 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:01,573 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:01,828 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:02,093 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:02,341 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:02,602 WARN L194 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:02,888 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:03,172 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:03,470 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:03,774 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:04,083 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:04,609 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:04,868 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:05,204 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:05,548 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:05,884 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:06,246 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:06,602 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:06,962 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:07,338 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:07,720 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:08,095 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:08,489 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:08,878 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:09,285 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:09,690 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:10,114 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:10,537 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:10,962 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:11,405 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:11,848 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:12,292 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:12,753 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:13,232 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:13,708 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:14,182 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:14,668 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:15,158 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:15,658 WARN L194 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:16,158 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:16,666 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:17,185 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:17,717 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:18,248 WARN L194 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:18,815 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:19,369 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:19,929 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:20,494 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:21,078 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:21,666 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:22,261 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:22,845 WARN L194 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:23,447 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:24,513 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:25,083 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:26,124 WARN L194 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:26,772 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:27,426 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:28,072 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:28,741 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:29,429 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:30,109 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:30,796 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:31,487 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:32,188 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:32,865 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:33,588 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:34,301 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:35,023 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:35,759 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:36,505 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:37,244 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:38,003 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:38,754 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:39,514 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:07:40,028 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 02:07:40,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797121816] [2020-11-07 02:07:40,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:07:40,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2020-11-07 02:07:40,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371910500] [2020-11-07 02:07:40,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 97 states [2020-11-07 02:07:40,030 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:07:40,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2020-11-07 02:07:40,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2307, Invalid=7005, Unknown=0, NotChecked=0, Total=9312 [2020-11-07 02:07:40,031 INFO L87 Difference]: Start difference. First operand 330 states and 335 transitions. Second operand 97 states. [2020-11-07 02:07:40,802 WARN L194 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2020-11-07 02:07:41,174 WARN L194 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2020-11-07 02:08:22,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-07 02:08:22,800 INFO L93 Difference]: Finished difference Result 379 states and 389 transitions. [2020-11-07 02:08:22,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2020-11-07 02:08:22,807 INFO L78 Accepts]: Start accepts. Automaton has 97 states. Word has length 319 [2020-11-07 02:08:22,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-07 02:08:22,809 INFO L225 Difference]: With dead ends: 379 [2020-11-07 02:08:22,809 INFO L226 Difference]: Without dead ends: 340 [2020-11-07 02:08:22,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6618 ImplicationChecksByTransitivity, 81.3s TimeCoverageRelationStatistics Valid=11015, Invalid=25275, Unknown=0, NotChecked=0, Total=36290 [2020-11-07 02:08:22,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2020-11-07 02:08:22,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 336. [2020-11-07 02:08:22,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 336 states. [2020-11-07 02:08:22,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 341 transitions. [2020-11-07 02:08:22,903 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 341 transitions. Word has length 319 [2020-11-07 02:08:22,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-07 02:08:22,904 INFO L481 AbstractCegarLoop]: Abstraction has 336 states and 341 transitions. [2020-11-07 02:08:22,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 97 states. [2020-11-07 02:08:22,904 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 341 transitions. [2020-11-07 02:08:22,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 326 [2020-11-07 02:08:22,906 INFO L414 BasicCegarLoop]: Found error trace [2020-11-07 02:08:22,906 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 02:08:22,906 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-11-07 02:08:22,906 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-07 02:08:22,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-07 02:08:22,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1560762760, now seen corresponding path program 46 times [2020-11-07 02:08:22,907 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-11-07 02:08:22,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1274912103] [2020-11-07 02:08:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-07 02:08:23,042 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:08:23,165 WARN L194 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-11-07 02:08:23,300 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 53 [2020-11-07 02:08:23,422 WARN L194 SmtUtils]: Spent 119.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2020-11-07 02:08:23,426 INFO L120 Accelerator]: FastUPR could not accelerate loop because java.lang.UnsupportedOperationException: No Result found. [2020-11-07 02:08:23,428 INFO L328 leratedInterpolation]: No loops in this trace, falling back to nested interpolation [2020-11-07 02:08:23,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-11-07 02:08:23,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:23,657 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-11-07 02:08:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-07 02:08:24,036 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:24,210 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:24,402 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:24,595 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:24,788 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:24,994 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:25,192 WARN L194 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:25,406 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:25,637 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:25,870 WARN L194 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:26,140 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:26,387 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:26,634 WARN L194 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:26,893 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:27,161 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:27,444 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:27,716 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:28,013 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:28,296 WARN L194 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:28,612 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:28,926 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:29,233 WARN L194 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:29,549 WARN L194 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:29,881 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:30,220 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:30,553 WARN L194 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:30,909 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:31,248 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:31,618 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:31,991 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:32,367 WARN L194 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:32,753 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:33,146 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:33,656 WARN L194 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:34,153 WARN L194 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:34,578 WARN L194 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:35,015 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:35,435 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:35,870 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:36,302 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:36,754 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:37,199 WARN L194 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:37,633 WARN L194 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:38,087 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:38,566 WARN L194 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:39,059 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:39,563 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:40,061 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:40,549 WARN L194 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:41,020 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:41,479 WARN L194 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:41,881 WARN L194 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:42,297 WARN L194 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:42,766 WARN L194 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:43,339 WARN L194 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:43,926 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:44,513 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:45,117 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:45,726 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:46,344 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:46,941 WARN L194 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:47,571 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:48,208 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:48,849 WARN L194 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:49,365 WARN L194 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:49,965 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:50,613 WARN L194 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:51,297 WARN L194 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,018 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:52,731 WARN L194 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:53,456 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:54,183 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:54,918 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:55,659 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:56,399 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:57,153 WARN L194 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:57,918 WARN L194 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:58,695 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:08:59,477 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:00,259 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:01,039 WARN L194 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:01,854 WARN L194 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:02,655 WARN L194 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:03,450 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:04,222 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:04,974 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:05,731 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:06,498 WARN L194 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:07,277 WARN L194 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:08,083 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:08,905 WARN L194 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:09,746 WARN L194 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:10,642 WARN L194 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 12 [2020-11-07 02:09:11,191 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 02:09:11,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1274912103] [2020-11-07 02:09:11,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-07 02:09:11,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2020-11-07 02:09:11,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644579561] [2020-11-07 02:09:11,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 99 states [2020-11-07 02:09:11,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-11-07 02:09:11,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2020-11-07 02:09:11,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2404, Invalid=7298, Unknown=0, NotChecked=0, Total=9702 [2020-11-07 02:09:11,194 INFO L87 Difference]: Start difference. First operand 336 states and 341 transitions. Second operand 99 states.