/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-c225d54 [2021-05-02 23:16:09,920 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-02 23:16:09,923 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-02 23:16:09,971 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-05-02 23:16:09,971 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-05-02 23:16:09,975 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-05-02 23:16:09,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-05-02 23:16:09,984 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-05-02 23:16:09,986 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-05-02 23:16:09,992 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-05-02 23:16:09,993 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-05-02 23:16:09,994 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-05-02 23:16:09,995 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-02 23:16:09,997 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-02 23:16:09,998 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-02 23:16:10,000 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-02 23:16:10,003 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-02 23:16:10,004 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-02 23:16:10,006 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-02 23:16:10,012 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-02 23:16:10,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-02 23:16:10,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-02 23:16:10,015 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-02 23:16:10,016 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-02 23:16:10,018 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-05-02 23:16:10,018 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-05-02 23:16:10,019 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-05-02 23:16:10,019 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-05-02 23:16:10,020 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-05-02 23:16:10,020 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-05-02 23:16:10,021 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-05-02 23:16:10,021 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-05-02 23:16:10,022 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-05-02 23:16:10,023 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-05-02 23:16:10,023 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-05-02 23:16:10,024 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-05-02 23:16:10,024 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-05-02 23:16:10,024 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-05-02 23:16:10,025 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-02 23:16:10,026 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-02 23:16:10,026 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-02 23:16:10,027 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2021-05-02 23:16:10,038 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-02 23:16:10,038 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-02 23:16:10,039 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-02 23:16:10,040 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-02 23:16:10,041 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-02 23:16:10,041 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-02 23:16:10,041 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-02 23:16:10,041 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-02 23:16:10,041 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-02 23:16:10,041 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-02 23:16:10,042 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2021-05-02 23:16:10,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-02 23:16:10,043 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2021-05-02 23:16:10,043 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2021-05-02 23:16:10,329 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-02 23:16:10,352 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-02 23:16:10,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-02 23:16:10,355 INFO L271 PluginConnector]: Initializing CDTParser... [2021-05-02 23:16:10,356 INFO L275 PluginConnector]: CDTParser initialized [2021-05-02 23:16:10,357 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/array_1-2.c [2021-05-02 23:16:10,420 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ffd2f627/6a3ff9271b9f4885bb908c99298b0d11/FLAG72bf990bd [2021-05-02 23:16:10,860 INFO L306 CDTParser]: Found 1 translation units. [2021-05-02 23:16:10,861 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c [2021-05-02 23:16:10,866 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ffd2f627/6a3ff9271b9f4885bb908c99298b0d11/FLAG72bf990bd [2021-05-02 23:16:10,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1ffd2f627/6a3ff9271b9f4885bb908c99298b0d11 [2021-05-02 23:16:10,895 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-02 23:16:10,897 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-02 23:16:10,898 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:10,898 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-05-02 23:16:10,902 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-05-02 23:16:10,903 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:10" (1/1) ... [2021-05-02 23:16:10,904 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5861adfd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:10, skipping insertion in model container [2021-05-02 23:16:10,904 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.05 11:16:10" (1/1) ... [2021-05-02 23:16:10,910 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-05-02 23:16:10,921 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-05-02 23:16:11,038 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c[321,334] [2021-05-02 23:16:11,049 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:11,056 INFO L203 MainTranslator]: Completed pre-run [2021-05-02 23:16:11,075 WARN L224 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-acceleration/array_1-2.c[321,334] [2021-05-02 23:16:11,078 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-05-02 23:16:11,090 INFO L208 MainTranslator]: Completed translation [2021-05-02 23:16:11,090 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11 WrapperNode [2021-05-02 23:16:11,090 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-05-02 23:16:11,091 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-02 23:16:11,092 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-02 23:16:11,092 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-02 23:16:11,119 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,120 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,144 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,145 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,165 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,168 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,169 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (1/1) ... [2021-05-02 23:16:11,170 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-02 23:16:11,171 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-02 23:16:11,171 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-02 23:16:11,172 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-02 23:16:11,175 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (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 [2021-05-02 23:16:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2021-05-02 23:16:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-02 23:16:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2021-05-02 23:16:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2021-05-02 23:16:11,249 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2021-05-02 23:16:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2021-05-02 23:16:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2021-05-02 23:16:11,250 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2021-05-02 23:16:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-05-02 23:16:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2021-05-02 23:16:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure main [2021-05-02 23:16:11,251 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-05-02 23:16:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-05-02 23:16:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-05-02 23:16:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2021-05-02 23:16:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-05-02 23:16:11,252 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-02 23:16:11,525 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-02 23:16:11,525 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-05-02 23:16:11,526 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:11 BoogieIcfgContainer [2021-05-02 23:16:11,527 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-02 23:16:11,528 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-02 23:16:11,528 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-02 23:16:11,531 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-02 23:16:11,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.05 11:16:10" (1/3) ... [2021-05-02 23:16:11,531 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7924ccdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:11, skipping insertion in model container [2021-05-02 23:16:11,531 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.05 11:16:11" (2/3) ... [2021-05-02 23:16:11,532 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7924ccdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.05 11:16:11, skipping insertion in model container [2021-05-02 23:16:11,532 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.05 11:16:11" (3/3) ... [2021-05-02 23:16:11,533 INFO L111 eAbstractionObserver]: Analyzing ICFG array_1-2.c [2021-05-02 23:16:11,538 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2021-05-02 23:16:11,541 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-05-02 23:16:11,555 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-05-02 23:16:11,571 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-05-02 23:16:11,571 INFO L377 AbstractCegarLoop]: Hoare is true [2021-05-02 23:16:11,571 INFO L378 AbstractCegarLoop]: Compute interpolants for AcceleratedInterpolation [2021-05-02 23:16:11,572 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-02 23:16:11,572 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-02 23:16:11,572 INFO L381 AbstractCegarLoop]: Difference is false [2021-05-02 23:16:11,572 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-02 23:16:11,572 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-02 23:16:11,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2021-05-02 23:16:11,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:11,588 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:11,588 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:11,588 INFO L428 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash 2003232087, now seen corresponding path program 1 times [2021-05-02 23:16:11,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:11,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427513033] [2021-05-02 23:16:11,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:11,660 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:11,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:11,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:11,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:11,843 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:11,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427513033] [2021-05-02 23:16:11,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427513033] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:11,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:11,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-02 23:16:11,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049788343] [2021-05-02 23:16:11,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-02 23:16:11,855 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:11,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-02 23:16:11,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:11,872 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 14 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:11,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:11,981 INFO L93 Difference]: Finished difference Result 34 states and 37 transitions. [2021-05-02 23:16:11,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-02 23:16:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:11,989 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:11,990 INFO L226 Difference]: Without dead ends: 14 [2021-05-02 23:16:11,996 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 50.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-02 23:16:12,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-05-02 23:16:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-05-02 23:16:12,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-05-02 23:16:12,040 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-05-02 23:16:12,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,041 INFO L480 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-05-02 23:16:12,041 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-05-02 23:16:12,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-05-02 23:16:12,042 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,043 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,043 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-02 23:16:12,043 INFO L428 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1831457181, now seen corresponding path program 1 times [2021-05-02 23:16:12,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71264518] [2021-05-02 23:16:12,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,059 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,219 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71264518] [2021-05-02 23:16:12,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [71264518] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-02 23:16:12,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620598655] [2021-05-02 23:16:12,221 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-05-02 23:16:12,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-05-02 23:16:12,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:12,222 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,298 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-05-02 23:16:12,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-02 23:16:12,300 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2021-05-02 23:16:12,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,301 INFO L225 Difference]: With dead ends: 22 [2021-05-02 23:16:12,301 INFO L226 Difference]: Without dead ends: 16 [2021-05-02 23:16:12,303 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 52.0ms TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-05-02 23:16:12,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-05-02 23:16:12,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-05-02 23:16:12,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-05-02 23:16:12,324 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-05-02 23:16:12,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,325 INFO L480 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-05-02 23:16:12,325 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,325 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-05-02 23:16:12,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-05-02 23:16:12,326 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,326 INFO L523 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,327 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-02 23:16:12,327 INFO L428 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1746962049, now seen corresponding path program 1 times [2021-05-02 23:16:12,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [816499125] [2021-05-02 23:16:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,357 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,363 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,496 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [816499125] [2021-05-02 23:16:12,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [816499125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,497 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-05-02 23:16:12,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447472393] [2021-05-02 23:16:12,497 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-02 23:16:12,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-02 23:16:12,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:12,499 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,560 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-05-02 23:16:12,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-02 23:16:12,561 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2021-05-02 23:16:12,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,561 INFO L225 Difference]: With dead ends: 24 [2021-05-02 23:16:12,561 INFO L226 Difference]: Without dead ends: 18 [2021-05-02 23:16:12,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 69.2ms TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-05-02 23:16:12,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-05-02 23:16:12,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-05-02 23:16:12,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-05-02 23:16:12,577 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-05-02 23:16:12,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,578 INFO L480 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-05-02 23:16:12,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,578 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-05-02 23:16:12,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-05-02 23:16:12,579 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,579 INFO L523 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-02 23:16:12,579 INFO L428 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,580 INFO L82 PathProgramCache]: Analyzing trace with hash -339037983, now seen corresponding path program 2 times [2021-05-02 23:16:12,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [97805792] [2021-05-02 23:16:12,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,590 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,593 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,690 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,690 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [97805792] [2021-05-02 23:16:12,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [97805792] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,691 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,691 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-05-02 23:16:12,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733247521] [2021-05-02 23:16:12,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-02 23:16:12,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-02 23:16:12,693 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:12,693 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,764 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-05-02 23:16:12,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-02 23:16:12,765 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2021-05-02 23:16:12,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,766 INFO L225 Difference]: With dead ends: 26 [2021-05-02 23:16:12,766 INFO L226 Difference]: Without dead ends: 20 [2021-05-02 23:16:12,767 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 37.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-05-02 23:16:12,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-05-02 23:16:12,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-05-02 23:16:12,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-05-02 23:16:12,772 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-05-02 23:16:12,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,772 INFO L480 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-05-02 23:16:12,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,773 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-05-02 23:16:12,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-05-02 23:16:12,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,773 INFO L523 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-05-02 23:16:12,774 INFO L428 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -238708797, now seen corresponding path program 3 times [2021-05-02 23:16:12,775 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,775 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [180118516] [2021-05-02 23:16:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,793 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,794 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:12,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:12,928 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:12,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [180118516] [2021-05-02 23:16:12,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [180118516] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:12,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:12,929 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-05-02 23:16:12,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704134901] [2021-05-02 23:16:12,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-05-02 23:16:12,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:12,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-05-02 23:16:12,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:12,930 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:12,976 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-05-02 23:16:12,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-05-02 23:16:12,977 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2021-05-02 23:16:12,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:12,977 INFO L225 Difference]: With dead ends: 28 [2021-05-02 23:16:12,978 INFO L226 Difference]: Without dead ends: 22 [2021-05-02 23:16:12,978 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 60.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-05-02 23:16:12,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-05-02 23:16:12,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-05-02 23:16:12,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-05-02 23:16:12,983 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-05-02 23:16:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:12,983 INFO L480 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-05-02 23:16:12,983 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 2.0) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:12,983 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-05-02 23:16:12,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-05-02 23:16:12,984 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:12,984 INFO L523 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:12,984 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-05-02 23:16:12,984 INFO L428 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:12,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:12,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1688358437, now seen corresponding path program 4 times [2021-05-02 23:16:12,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:12,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309576490] [2021-05-02 23:16:12,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:12,990 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:12,992 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:13,106 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,106 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309576490] [2021-05-02 23:16:13,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1309576490] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-05-02 23:16:13,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856807598] [2021-05-02 23:16:13,107 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-05-02 23:16:13,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-05-02 23:16:13,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:13,108 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,187 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-05-02 23:16:13,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-05-02 23:16:13,189 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2021-05-02 23:16:13,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,191 INFO L225 Difference]: With dead ends: 30 [2021-05-02 23:16:13,191 INFO L226 Difference]: Without dead ends: 24 [2021-05-02 23:16:13,192 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 59.6ms TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-05-02 23:16:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-05-02 23:16:13,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-05-02 23:16:13,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-05-02 23:16:13,203 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-05-02 23:16:13,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,204 INFO L480 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-05-02 23:16:13,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,204 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-05-02 23:16:13,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-02 23:16:13,205 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,205 INFO L523 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-05-02 23:16:13,205 INFO L428 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1825901561, now seen corresponding path program 5 times [2021-05-02 23:16:13,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132146223] [2021-05-02 23:16:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,212 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,213 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,372 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:13,390 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132146223] [2021-05-02 23:16:13,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132146223] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2021-05-02 23:16:13,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332697895] [2021-05-02 23:16:13,391 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-05-02 23:16:13,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-05-02 23:16:13,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:13,392 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,453 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-05-02 23:16:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-05-02 23:16:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2021-05-02 23:16:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,454 INFO L225 Difference]: With dead ends: 32 [2021-05-02 23:16:13,454 INFO L226 Difference]: Without dead ends: 26 [2021-05-02 23:16:13,455 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 83.0ms TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2021-05-02 23:16:13,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-05-02 23:16:13,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-05-02 23:16:13,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-05-02 23:16:13,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-05-02 23:16:13,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,460 INFO L480 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-05-02 23:16:13,460 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-05-02 23:16:13,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-05-02 23:16:13,461 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,461 INFO L523 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-05-02 23:16:13,461 INFO L428 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1109502313, now seen corresponding path program 6 times [2021-05-02 23:16:13,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2039337007] [2021-05-02 23:16:13,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,467 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,468 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,560 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:13,569 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,569 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2039337007] [2021-05-02 23:16:13,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2039337007] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2021-05-02 23:16:13,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178772755] [2021-05-02 23:16:13,570 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-05-02 23:16:13,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-05-02 23:16:13,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:13,571 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,650 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-05-02 23:16:13,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-05-02 23:16:13,650 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2021-05-02 23:16:13,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,653 INFO L225 Difference]: With dead ends: 34 [2021-05-02 23:16:13,653 INFO L226 Difference]: Without dead ends: 28 [2021-05-02 23:16:13,653 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 63.2ms TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2021-05-02 23:16:13,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-05-02 23:16:13,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-05-02 23:16:13,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-05-02 23:16:13,668 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-05-02 23:16:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,668 INFO L480 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-05-02 23:16:13,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.0) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-05-02 23:16:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-05-02 23:16:13,669 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,670 INFO L523 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-05-02 23:16:13,670 INFO L428 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,671 INFO L82 PathProgramCache]: Analyzing trace with hash 239111755, now seen corresponding path program 7 times [2021-05-02 23:16:13,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125731946] [2021-05-02 23:16:13,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,681 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,683 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,821 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:13,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:13,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:13,833 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:13,833 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125731946] [2021-05-02 23:16:13,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125731946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:13,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:13,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2021-05-02 23:16:13,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651292881] [2021-05-02 23:16:13,834 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-05-02 23:16:13,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:13,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-05-02 23:16:13,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:13,835 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:13,913 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-05-02 23:16:13,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-05-02 23:16:13,914 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2021-05-02 23:16:13,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:13,918 INFO L225 Difference]: With dead ends: 36 [2021-05-02 23:16:13,918 INFO L226 Difference]: Without dead ends: 30 [2021-05-02 23:16:13,919 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2021-05-02 23:16:13,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-05-02 23:16:13,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-05-02 23:16:13,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-05-02 23:16:13,930 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-05-02 23:16:13,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:13,930 INFO L480 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-05-02 23:16:13,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:13,931 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-05-02 23:16:13,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-02 23:16:13,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:13,932 INFO L523 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:13,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-05-02 23:16:13,932 INFO L428 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:13,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:13,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1312408237, now seen corresponding path program 8 times [2021-05-02 23:16:13,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:13,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668987985] [2021-05-02 23:16:13,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:13,942 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:13,944 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:13,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,110 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,120 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668987985] [2021-05-02 23:16:14,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668987985] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,121 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2021-05-02 23:16:14,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056550430] [2021-05-02 23:16:14,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-05-02 23:16:14,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-05-02 23:16:14,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:14,122 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,195 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-05-02 23:16:14,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-02 23:16:14,195 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2021-05-02 23:16:14,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,196 INFO L225 Difference]: With dead ends: 38 [2021-05-02 23:16:14,196 INFO L226 Difference]: Without dead ends: 32 [2021-05-02 23:16:14,197 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 95.1ms TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2021-05-02 23:16:14,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-05-02 23:16:14,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-05-02 23:16:14,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-05-02 23:16:14,201 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-05-02 23:16:14,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,201 INFO L480 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-05-02 23:16:14,201 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,202 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-05-02 23:16:14,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-05-02 23:16:14,202 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,202 INFO L523 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-05-02 23:16:14,203 INFO L428 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1958176399, now seen corresponding path program 9 times [2021-05-02 23:16:14,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1053719045] [2021-05-02 23:16:14,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,208 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,210 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,358 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1053719045] [2021-05-02 23:16:14,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1053719045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2021-05-02 23:16:14,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645956152] [2021-05-02 23:16:14,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-05-02 23:16:14,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-05-02 23:16:14,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:14,360 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,440 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-05-02 23:16:14,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-05-02 23:16:14,445 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2021-05-02 23:16:14,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,447 INFO L225 Difference]: With dead ends: 40 [2021-05-02 23:16:14,448 INFO L226 Difference]: Without dead ends: 34 [2021-05-02 23:16:14,451 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-05-02 23:16:14,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-05-02 23:16:14,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-05-02 23:16:14,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-05-02 23:16:14,461 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-05-02 23:16:14,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,461 INFO L480 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-05-02 23:16:14,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-05-02 23:16:14,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-05-02 23:16:14,462 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,462 INFO L523 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-05-02 23:16:14,463 INFO L428 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,463 INFO L82 PathProgramCache]: Analyzing trace with hash -228877839, now seen corresponding path program 10 times [2021-05-02 23:16:14,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997887208] [2021-05-02 23:16:14,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,468 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,469 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,603 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,618 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997887208] [2021-05-02 23:16:14,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1997887208] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2021-05-02 23:16:14,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18231375] [2021-05-02 23:16:14,619 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-05-02 23:16:14,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-05-02 23:16:14,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:14,621 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,703 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-05-02 23:16:14,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-05-02 23:16:14,703 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2021-05-02 23:16:14,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:14,704 INFO L225 Difference]: With dead ends: 42 [2021-05-02 23:16:14,704 INFO L226 Difference]: Without dead ends: 36 [2021-05-02 23:16:14,705 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 96.6ms TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2021-05-02 23:16:14,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-05-02 23:16:14,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-05-02 23:16:14,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-05-02 23:16:14,710 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-05-02 23:16:14,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:14,710 INFO L480 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-05-02 23:16:14,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.0) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,711 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-05-02 23:16:14,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-02 23:16:14,711 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:14,712 INFO L523 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:14,712 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-05-02 23:16:14,712 INFO L428 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:14,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:14,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1748992813, now seen corresponding path program 11 times [2021-05-02 23:16:14,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:14,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965891579] [2021-05-02 23:16:14,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:14,718 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:14,720 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:14,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:14,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:14,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:14,906 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:14,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965891579] [2021-05-02 23:16:14,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1965891579] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:14,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:14,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2021-05-02 23:16:14,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191282070] [2021-05-02 23:16:14,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-05-02 23:16:14,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:14,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-05-02 23:16:14,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:14,909 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:14,999 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-05-02 23:16:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-05-02 23:16:15,001 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2021-05-02 23:16:15,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,002 INFO L225 Difference]: With dead ends: 44 [2021-05-02 23:16:15,002 INFO L226 Difference]: Without dead ends: 38 [2021-05-02 23:16:15,003 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2021-05-02 23:16:15,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-05-02 23:16:15,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-05-02 23:16:15,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-05-02 23:16:15,012 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-05-02 23:16:15,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,013 INFO L480 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-05-02 23:16:15,013 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,013 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-05-02 23:16:15,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-05-02 23:16:15,014 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,014 INFO L523 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-05-02 23:16:15,014 INFO L428 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,015 INFO L82 PathProgramCache]: Analyzing trace with hash 2004365109, now seen corresponding path program 12 times [2021-05-02 23:16:15,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [441968202] [2021-05-02 23:16:15,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,020 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,021 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,185 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,197 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [441968202] [2021-05-02 23:16:15,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [441968202] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2021-05-02 23:16:15,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925884846] [2021-05-02 23:16:15,198 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-02 23:16:15,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-02 23:16:15,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:15,199 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,295 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-05-02 23:16:15,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-05-02 23:16:15,295 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2021-05-02 23:16:15,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,297 INFO L225 Difference]: With dead ends: 46 [2021-05-02 23:16:15,297 INFO L226 Difference]: Without dead ends: 40 [2021-05-02 23:16:15,298 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2021-05-02 23:16:15,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-05-02 23:16:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-05-02 23:16:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-05-02 23:16:15,311 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-05-02 23:16:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,312 INFO L480 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-05-02 23:16:15,312 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.0) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,312 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-05-02 23:16:15,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-05-02 23:16:15,312 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,312 INFO L523 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,313 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-05-02 23:16:15,313 INFO L428 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1208799511, now seen corresponding path program 13 times [2021-05-02 23:16:15,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [581918509] [2021-05-02 23:16:15,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,320 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,321 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,541 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,541 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [581918509] [2021-05-02 23:16:15,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [581918509] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2021-05-02 23:16:15,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768216098] [2021-05-02 23:16:15,542 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-05-02 23:16:15,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-05-02 23:16:15,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:15,543 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,621 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-05-02 23:16:15,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-05-02 23:16:15,621 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2021-05-02 23:16:15,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,622 INFO L225 Difference]: With dead ends: 48 [2021-05-02 23:16:15,622 INFO L226 Difference]: Without dead ends: 42 [2021-05-02 23:16:15,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 134.4ms TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2021-05-02 23:16:15,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-05-02 23:16:15,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-05-02 23:16:15,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-05-02 23:16:15,626 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-05-02 23:16:15,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,627 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-05-02 23:16:15,627 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,627 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-05-02 23:16:15,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-05-02 23:16:15,627 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,627 INFO L523 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-05-02 23:16:15,628 INFO L428 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,628 INFO L82 PathProgramCache]: Analyzing trace with hash 1174438521, now seen corresponding path program 14 times [2021-05-02 23:16:15,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,628 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550810282] [2021-05-02 23:16:15,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,633 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,634 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,825 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:15,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:15,832 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:15,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550810282] [2021-05-02 23:16:15,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [550810282] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:15,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:15,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2021-05-02 23:16:15,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391879599] [2021-05-02 23:16:15,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-05-02 23:16:15,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:15,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-05-02 23:16:15,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:15,834 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:15,914 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-05-02 23:16:15,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-05-02 23:16:15,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2021-05-02 23:16:15,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:15,915 INFO L225 Difference]: With dead ends: 50 [2021-05-02 23:16:15,915 INFO L226 Difference]: Without dead ends: 44 [2021-05-02 23:16:15,916 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2021-05-02 23:16:15,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-05-02 23:16:15,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-05-02 23:16:15,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-05-02 23:16:15,920 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-05-02 23:16:15,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:15,920 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-05-02 23:16:15,920 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:15,920 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-05-02 23:16:15,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-05-02 23:16:15,921 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:15,921 INFO L523 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:15,921 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-05-02 23:16:15,921 INFO L428 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:15,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1781701797, now seen corresponding path program 15 times [2021-05-02 23:16:15,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:15,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1381281125] [2021-05-02 23:16:15,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:15,933 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:15,934 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,165 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1381281125] [2021-05-02 23:16:16,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1381281125] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2021-05-02 23:16:16,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63831490] [2021-05-02 23:16:16,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-05-02 23:16:16,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-05-02 23:16:16,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:16,167 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,235 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-05-02 23:16:16,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-05-02 23:16:16,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2021-05-02 23:16:16,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,236 INFO L225 Difference]: With dead ends: 52 [2021-05-02 23:16:16,236 INFO L226 Difference]: Without dead ends: 46 [2021-05-02 23:16:16,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 157.1ms TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2021-05-02 23:16:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-05-02 23:16:16,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-05-02 23:16:16,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.025) internal successors, (41), 40 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-05-02 23:16:16,240 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-05-02 23:16:16,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,240 INFO L480 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-05-02 23:16:16,241 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,241 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-05-02 23:16:16,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-05-02 23:16:16,241 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,241 INFO L523 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,241 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-05-02 23:16:16,242 INFO L428 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,242 INFO L82 PathProgramCache]: Analyzing trace with hash 635802557, now seen corresponding path program 16 times [2021-05-02 23:16:16,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,242 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943943764] [2021-05-02 23:16:16,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,247 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,248 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,481 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943943764] [2021-05-02 23:16:16,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1943943764] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,482 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,482 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2021-05-02 23:16:16,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861028092] [2021-05-02 23:16:16,482 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-05-02 23:16:16,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-05-02 23:16:16,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:16,483 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,570 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-05-02 23:16:16,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-05-02 23:16:16,570 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2021-05-02 23:16:16,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,571 INFO L225 Difference]: With dead ends: 54 [2021-05-02 23:16:16,571 INFO L226 Difference]: Without dead ends: 48 [2021-05-02 23:16:16,572 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 189.2ms TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2021-05-02 23:16:16,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-05-02 23:16:16,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-05-02 23:16:16,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-05-02 23:16:16,576 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-05-02 23:16:16,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,576 INFO L480 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-05-02 23:16:16,576 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,576 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-05-02 23:16:16,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-05-02 23:16:16,577 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,577 INFO L523 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,577 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-05-02 23:16:16,577 INFO L428 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,577 INFO L82 PathProgramCache]: Analyzing trace with hash 280179615, now seen corresponding path program 17 times [2021-05-02 23:16:16,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854384104] [2021-05-02 23:16:16,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,582 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,583 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,802 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:16,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:16,808 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:16,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854384104] [2021-05-02 23:16:16,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854384104] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:16,808 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:16,808 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2021-05-02 23:16:16,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417000566] [2021-05-02 23:16:16,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-05-02 23:16:16,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:16,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-05-02 23:16:16,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:16,809 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:16,902 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-05-02 23:16:16,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-05-02 23:16:16,902 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2021-05-02 23:16:16,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:16,903 INFO L225 Difference]: With dead ends: 56 [2021-05-02 23:16:16,903 INFO L226 Difference]: Without dead ends: 50 [2021-05-02 23:16:16,904 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 184.8ms TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2021-05-02 23:16:16,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-05-02 23:16:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-05-02 23:16:16,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-05-02 23:16:16,908 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-05-02 23:16:16,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:16,908 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-05-02 23:16:16,908 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:16,908 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-05-02 23:16:16,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-05-02 23:16:16,909 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:16,909 INFO L523 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:16,909 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-05-02 23:16:16,909 INFO L428 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:16,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:16,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2123916033, now seen corresponding path program 18 times [2021-05-02 23:16:16,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:16,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224469144] [2021-05-02 23:16:16,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:16,914 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:16,916 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,146 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,172 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224469144] [2021-05-02 23:16:17,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224469144] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2021-05-02 23:16:17,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601170207] [2021-05-02 23:16:17,173 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-05-02 23:16:17,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-05-02 23:16:17,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:17,175 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,262 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-05-02 23:16:17,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-05-02 23:16:17,264 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2021-05-02 23:16:17,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,265 INFO L225 Difference]: With dead ends: 58 [2021-05-02 23:16:17,265 INFO L226 Difference]: Without dead ends: 52 [2021-05-02 23:16:17,265 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2021-05-02 23:16:17,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-05-02 23:16:17,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-05-02 23:16:17,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-05-02 23:16:17,269 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-05-02 23:16:17,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,269 INFO L480 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-05-02 23:16:17,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 21 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,269 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-05-02 23:16:17,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-05-02 23:16:17,270 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,270 INFO L523 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,270 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-05-02 23:16:17,270 INFO L428 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,271 INFO L82 PathProgramCache]: Analyzing trace with hash 133120483, now seen corresponding path program 19 times [2021-05-02 23:16:17,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167278830] [2021-05-02 23:16:17,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,280 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,281 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:17,573 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:17,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167278830] [2021-05-02 23:16:17,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [167278830] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:17,573 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:17,573 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2021-05-02 23:16:17,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555535295] [2021-05-02 23:16:17,574 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-02 23:16:17,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:17,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-02 23:16:17,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:17,575 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:17,695 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-05-02 23:16:17,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-05-02 23:16:17,696 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2021-05-02 23:16:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:17,697 INFO L225 Difference]: With dead ends: 60 [2021-05-02 23:16:17,697 INFO L226 Difference]: Without dead ends: 54 [2021-05-02 23:16:17,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 238.3ms TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2021-05-02 23:16:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-05-02 23:16:17,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-05-02 23:16:17,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-05-02 23:16:17,704 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-05-02 23:16:17,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:17,705 INFO L480 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-05-02 23:16:17,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0) internal successors, (46), 22 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:17,705 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-05-02 23:16:17,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-05-02 23:16:17,706 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:17,706 INFO L523 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:17,706 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-05-02 23:16:17,706 INFO L428 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:17,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:17,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1760956347, now seen corresponding path program 20 times [2021-05-02 23:16:17,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:17,707 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493291567] [2021-05-02 23:16:17,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:17,711 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:17,712 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:17,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,005 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493291567] [2021-05-02 23:16:18,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493291567] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2021-05-02 23:16:18,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85968450] [2021-05-02 23:16:18,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-02 23:16:18,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-02 23:16:18,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:18,007 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,122 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-05-02 23:16:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-05-02 23:16:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 52 [2021-05-02 23:16:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,123 INFO L225 Difference]: With dead ends: 62 [2021-05-02 23:16:18,123 INFO L226 Difference]: Without dead ends: 56 [2021-05-02 23:16:18,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 248.0ms TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2021-05-02 23:16:18,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-05-02 23:16:18,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-05-02 23:16:18,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-05-02 23:16:18,128 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-05-02 23:16:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,128 INFO L480 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-05-02 23:16:18,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.0) internal successors, (48), 23 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-05-02 23:16:18,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-05-02 23:16:18,129 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,129 INFO L523 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-05-02 23:16:18,129 INFO L428 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,130 INFO L82 PathProgramCache]: Analyzing trace with hash -902656473, now seen corresponding path program 21 times [2021-05-02 23:16:18,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1361214829] [2021-05-02 23:16:18,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,135 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,136 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,487 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,487 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1361214829] [2021-05-02 23:16:18,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1361214829] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2021-05-02 23:16:18,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929143928] [2021-05-02 23:16:18,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-05-02 23:16:18,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-05-02 23:16:18,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:18,489 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:18,557 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-05-02 23:16:18,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-05-02 23:16:18,558 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2021-05-02 23:16:18,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:18,559 INFO L225 Difference]: With dead ends: 64 [2021-05-02 23:16:18,559 INFO L226 Difference]: Without dead ends: 58 [2021-05-02 23:16:18,560 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2021-05-02 23:16:18,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-05-02 23:16:18,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-05-02 23:16:18,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-05-02 23:16:18,564 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-05-02 23:16:18,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:18,564 INFO L480 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-05-02 23:16:18,564 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.0) internal successors, (50), 24 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:18,565 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-05-02 23:16:18,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-05-02 23:16:18,565 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:18,565 INFO L523 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:18,565 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-05-02 23:16:18,565 INFO L428 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:18,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:18,566 INFO L82 PathProgramCache]: Analyzing trace with hash -710198391, now seen corresponding path program 22 times [2021-05-02 23:16:18,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:18,566 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771493621] [2021-05-02 23:16:18,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:18,570 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:18,572 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:18,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,904 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:18,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:18,908 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:18,908 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771493621] [2021-05-02 23:16:18,909 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771493621] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:18,909 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:18,909 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2021-05-02 23:16:18,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654964693] [2021-05-02 23:16:18,909 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-05-02 23:16:18,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:18,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-05-02 23:16:18,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:18,910 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,014 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-05-02 23:16:19,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-05-02 23:16:19,015 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2021-05-02 23:16:19,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,015 INFO L225 Difference]: With dead ends: 66 [2021-05-02 23:16:19,015 INFO L226 Difference]: Without dead ends: 60 [2021-05-02 23:16:19,016 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 293.0ms TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2021-05-02 23:16:19,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-05-02 23:16:19,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-05-02 23:16:19,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-05-02 23:16:19,020 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-05-02 23:16:19,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,020 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-05-02 23:16:19,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,020 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-05-02 23:16:19,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-05-02 23:16:19,021 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,021 INFO L523 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,021 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-05-02 23:16:19,021 INFO L428 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,022 INFO L82 PathProgramCache]: Analyzing trace with hash -441575317, now seen corresponding path program 23 times [2021-05-02 23:16:19,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [333002634] [2021-05-02 23:16:19,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,026 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,027 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,423 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,424 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [333002634] [2021-05-02 23:16:19,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [333002634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2021-05-02 23:16:19,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123689669] [2021-05-02 23:16:19,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-05-02 23:16:19,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-05-02 23:16:19,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:19,425 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:19,515 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-05-02 23:16:19,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-05-02 23:16:19,516 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2021-05-02 23:16:19,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:19,517 INFO L225 Difference]: With dead ends: 68 [2021-05-02 23:16:19,517 INFO L226 Difference]: Without dead ends: 62 [2021-05-02 23:16:19,518 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 327.9ms TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2021-05-02 23:16:19,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-05-02 23:16:19,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-05-02 23:16:19,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-05-02 23:16:19,523 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-05-02 23:16:19,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:19,523 INFO L480 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-05-02 23:16:19,530 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.0) internal successors, (54), 26 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:19,530 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-05-02 23:16:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-05-02 23:16:19,531 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:19,531 INFO L523 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:19,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-05-02 23:16:19,531 INFO L428 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:19,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:19,532 INFO L82 PathProgramCache]: Analyzing trace with hash 7161037, now seen corresponding path program 24 times [2021-05-02 23:16:19,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:19,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [468694238] [2021-05-02 23:16:19,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:19,537 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:19,538 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:19,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:19,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:19,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:19,924 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:19,924 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [468694238] [2021-05-02 23:16:19,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [468694238] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:19,924 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:19,924 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2021-05-02 23:16:19,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339639104] [2021-05-02 23:16:19,924 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-05-02 23:16:19,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:19,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-05-02 23:16:19,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:19,926 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,080 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-05-02 23:16:20,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-05-02 23:16:20,081 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2021-05-02 23:16:20,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,081 INFO L225 Difference]: With dead ends: 70 [2021-05-02 23:16:20,081 INFO L226 Difference]: Without dead ends: 64 [2021-05-02 23:16:20,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 333.6ms TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2021-05-02 23:16:20,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-05-02 23:16:20,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-05-02 23:16:20,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-05-02 23:16:20,091 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-05-02 23:16:20,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,091 INFO L480 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-05-02 23:16:20,092 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 27 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,092 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-05-02 23:16:20,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-05-02 23:16:20,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,092 INFO L523 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-05-02 23:16:20,093 INFO L428 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1746067631, now seen corresponding path program 25 times [2021-05-02 23:16:20,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643370045] [2021-05-02 23:16:20,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,099 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,101 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:20,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:20,518 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:20,519 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643370045] [2021-05-02 23:16:20,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [643370045] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:20,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:20,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2021-05-02 23:16:20,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1354644354] [2021-05-02 23:16:20,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-05-02 23:16:20,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:20,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-05-02 23:16:20,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:20,520 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:20,638 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-05-02 23:16:20,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-05-02 23:16:20,639 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2021-05-02 23:16:20,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:20,639 INFO L225 Difference]: With dead ends: 72 [2021-05-02 23:16:20,639 INFO L226 Difference]: Without dead ends: 66 [2021-05-02 23:16:20,640 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 374.8ms TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2021-05-02 23:16:20,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-05-02 23:16:20,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-05-02 23:16:20,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-05-02 23:16:20,643 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-05-02 23:16:20,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:20,644 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-05-02 23:16:20,644 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:20,644 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-05-02 23:16:20,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-05-02 23:16:20,644 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:20,645 INFO L523 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:20,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-05-02 23:16:20,645 INFO L428 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:20,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:20,645 INFO L82 PathProgramCache]: Analyzing trace with hash 2093026321, now seen corresponding path program 26 times [2021-05-02 23:16:20,645 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:20,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1900679704] [2021-05-02 23:16:20,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:20,650 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:20,652 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,083 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,088 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1900679704] [2021-05-02 23:16:21,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1900679704] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2021-05-02 23:16:21,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259646777] [2021-05-02 23:16:21,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-05-02 23:16:21,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-05-02 23:16:21,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:21,090 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,178 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-05-02 23:16:21,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-05-02 23:16:21,179 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 64 [2021-05-02 23:16:21,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,179 INFO L225 Difference]: With dead ends: 74 [2021-05-02 23:16:21,179 INFO L226 Difference]: Without dead ends: 68 [2021-05-02 23:16:21,180 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2021-05-02 23:16:21,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-05-02 23:16:21,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-05-02 23:16:21,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-05-02 23:16:21,184 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-05-02 23:16:21,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,184 INFO L480 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-05-02 23:16:21,184 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 29 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,184 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-05-02 23:16:21,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-05-02 23:16:21,185 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,185 INFO L523 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,185 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-05-02 23:16:21,185 INFO L428 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,186 INFO L82 PathProgramCache]: Analyzing trace with hash 512878323, now seen corresponding path program 27 times [2021-05-02 23:16:21,186 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,186 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1589097326] [2021-05-02 23:16:21,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,190 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,191 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:21,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:21,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:21,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:21,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1589097326] [2021-05-02 23:16:21,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1589097326] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:21,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:21,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2021-05-02 23:16:21,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658628484] [2021-05-02 23:16:21,674 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-02 23:16:21,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:21,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-02 23:16:21,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:21,676 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:21,773 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-05-02 23:16:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-05-02 23:16:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2021-05-02 23:16:21,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:21,774 INFO L225 Difference]: With dead ends: 76 [2021-05-02 23:16:21,774 INFO L226 Difference]: Without dead ends: 70 [2021-05-02 23:16:21,776 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2021-05-02 23:16:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-05-02 23:16:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-05-02 23:16:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-05-02 23:16:21,780 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-05-02 23:16:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:21,780 INFO L480 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-05-02 23:16:21,780 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.0) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-05-02 23:16:21,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-05-02 23:16:21,781 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:21,781 INFO L523 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:21,781 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-05-02 23:16:21,781 INFO L428 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:21,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:21,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1885892267, now seen corresponding path program 28 times [2021-05-02 23:16:21,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:21,782 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1136490682] [2021-05-02 23:16:21,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:21,788 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:21,790 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:21,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,274 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,278 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1136490682] [2021-05-02 23:16:22,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1136490682] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2021-05-02 23:16:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618292882] [2021-05-02 23:16:22,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-02 23:16:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-02 23:16:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:22,280 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:22,383 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-05-02 23:16:22,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-05-02 23:16:22,383 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2021-05-02 23:16:22,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:22,384 INFO L225 Difference]: With dead ends: 78 [2021-05-02 23:16:22,384 INFO L226 Difference]: Without dead ends: 72 [2021-05-02 23:16:22,386 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 432.6ms TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2021-05-02 23:16:22,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-05-02 23:16:22,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-05-02 23:16:22,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-05-02 23:16:22,390 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-05-02 23:16:22,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:22,390 INFO L480 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-05-02 23:16:22,390 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.0) internal successors, (64), 31 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:22,390 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-05-02 23:16:22,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-05-02 23:16:22,391 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:22,391 INFO L523 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:22,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-05-02 23:16:22,391 INFO L428 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash -706991305, now seen corresponding path program 29 times [2021-05-02 23:16:22,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:22,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676859950] [2021-05-02 23:16:22,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:22,399 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:22,401 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:22,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:22,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:22,944 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:22,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676859950] [2021-05-02 23:16:22,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [676859950] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:22,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:22,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2021-05-02 23:16:22,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209185541] [2021-05-02 23:16:22,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-05-02 23:16:22,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:22,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-05-02 23:16:22,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:22,948 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,080 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-05-02 23:16:23,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-05-02 23:16:23,081 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2021-05-02 23:16:23,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,081 INFO L225 Difference]: With dead ends: 80 [2021-05-02 23:16:23,081 INFO L226 Difference]: Without dead ends: 74 [2021-05-02 23:16:23,082 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 483.8ms TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2021-05-02 23:16:23,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-05-02 23:16:23,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-05-02 23:16:23,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-05-02 23:16:23,086 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-05-02 23:16:23,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,086 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-05-02 23:16:23,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 2.0) internal successors, (66), 32 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-05-02 23:16:23,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-05-02 23:16:23,087 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,087 INFO L523 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,088 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-05-02 23:16:23,088 INFO L428 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1654532967, now seen corresponding path program 30 times [2021-05-02 23:16:23,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104592084] [2021-05-02 23:16:23,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,092 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,094 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:23,658 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:23,658 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104592084] [2021-05-02 23:16:23,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104592084] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:23,659 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:23,659 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2021-05-02 23:16:23,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391819502] [2021-05-02 23:16:23,659 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-05-02 23:16:23,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:23,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-05-02 23:16:23,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:23,661 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:23,816 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-05-02 23:16:23,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-05-02 23:16:23,816 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2021-05-02 23:16:23,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:23,817 INFO L225 Difference]: With dead ends: 82 [2021-05-02 23:16:23,817 INFO L226 Difference]: Without dead ends: 76 [2021-05-02 23:16:23,820 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 503.9ms TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2021-05-02 23:16:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-05-02 23:16:23,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-05-02 23:16:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 states have internal predecessors, (71), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-05-02 23:16:23,825 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-05-02 23:16:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:23,825 INFO L480 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-05-02 23:16:23,825 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 2.0) internal successors, (68), 33 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-05-02 23:16:23,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-05-02 23:16:23,826 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:23,826 INFO L523 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:23,826 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-05-02 23:16:23,826 INFO L428 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:23,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:23,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1709003397, now seen corresponding path program 31 times [2021-05-02 23:16:23,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:23,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1924940832] [2021-05-02 23:16:23,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:23,831 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:23,832 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:23,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:24,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:24,414 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:24,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1924940832] [2021-05-02 23:16:24,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1924940832] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:24,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:24,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2021-05-02 23:16:24,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021825884] [2021-05-02 23:16:24,414 INFO L460 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-05-02 23:16:24,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:24,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-05-02 23:16:24,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:24,416 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:24,535 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-05-02 23:16:24,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-05-02 23:16:24,537 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2021-05-02 23:16:24,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:24,538 INFO L225 Difference]: With dead ends: 84 [2021-05-02 23:16:24,538 INFO L226 Difference]: Without dead ends: 78 [2021-05-02 23:16:24,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2021-05-02 23:16:24,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-05-02 23:16:24,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-05-02 23:16:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-05-02 23:16:24,544 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-05-02 23:16:24,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:24,544 INFO L480 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-05-02 23:16:24,544 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.0) internal successors, (70), 34 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:24,545 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-05-02 23:16:24,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-05-02 23:16:24,545 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:24,545 INFO L523 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:24,546 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-05-02 23:16:24,546 INFO L428 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:24,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:24,546 INFO L82 PathProgramCache]: Analyzing trace with hash 1779488221, now seen corresponding path program 32 times [2021-05-02 23:16:24,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:24,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56654482] [2021-05-02 23:16:24,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:24,555 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:24,556 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:24,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,121 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56654482] [2021-05-02 23:16:25,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [56654482] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,121 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2021-05-02 23:16:25,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52774533] [2021-05-02 23:16:25,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-05-02 23:16:25,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-05-02 23:16:25,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:25,123 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:25,290 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-05-02 23:16:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-05-02 23:16:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2021-05-02 23:16:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:25,291 INFO L225 Difference]: With dead ends: 86 [2021-05-02 23:16:25,291 INFO L226 Difference]: Without dead ends: 80 [2021-05-02 23:16:25,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 503.8ms TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2021-05-02 23:16:25,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-05-02 23:16:25,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-05-02 23:16:25,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-05-02 23:16:25,295 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-05-02 23:16:25,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:25,296 INFO L480 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-05-02 23:16:25,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.0) internal successors, (72), 35 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:25,296 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-05-02 23:16:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-05-02 23:16:25,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:25,296 INFO L523 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:25,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-05-02 23:16:25,297 INFO L428 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:25,297 INFO L82 PathProgramCache]: Analyzing trace with hash -149525057, now seen corresponding path program 33 times [2021-05-02 23:16:25,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:25,297 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [894670654] [2021-05-02 23:16:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:25,302 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:25,304 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:25,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:25,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:25,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:25,873 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:25,873 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [894670654] [2021-05-02 23:16:25,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [894670654] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:25,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:25,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2021-05-02 23:16:25,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10564012] [2021-05-02 23:16:25,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-05-02 23:16:25,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:25,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-05-02 23:16:25,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:25,875 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,052 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-05-02 23:16:26,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-05-02 23:16:26,052 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 78 [2021-05-02 23:16:26,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,053 INFO L225 Difference]: With dead ends: 88 [2021-05-02 23:16:26,053 INFO L226 Difference]: Without dead ends: 82 [2021-05-02 23:16:26,054 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 511.5ms TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2021-05-02 23:16:26,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-05-02 23:16:26,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-05-02 23:16:26,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-05-02 23:16:26,058 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-05-02 23:16:26,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,058 INFO L480 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-05-02 23:16:26,058 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.0) internal successors, (74), 36 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,059 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-05-02 23:16:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-05-02 23:16:26,059 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,059 INFO L523 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,059 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2021-05-02 23:16:26,059 INFO L428 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1494586657, now seen corresponding path program 34 times [2021-05-02 23:16:26,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1227460790] [2021-05-02 23:16:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,064 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,065 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:26,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:26,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:26,682 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:26,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1227460790] [2021-05-02 23:16:26,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1227460790] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:26,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:26,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2021-05-02 23:16:26,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015831680] [2021-05-02 23:16:26,682 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-05-02 23:16:26,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:26,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-05-02 23:16:26,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:26,683 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:26,850 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-05-02 23:16:26,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-05-02 23:16:26,851 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2021-05-02 23:16:26,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:26,852 INFO L225 Difference]: With dead ends: 90 [2021-05-02 23:16:26,852 INFO L226 Difference]: Without dead ends: 84 [2021-05-02 23:16:26,852 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 533.4ms TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2021-05-02 23:16:26,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-05-02 23:16:26,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-05-02 23:16:26,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-05-02 23:16:26,856 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-05-02 23:16:26,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:26,856 INFO L480 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-05-02 23:16:26,857 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.0) internal successors, (76), 37 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:26,857 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-05-02 23:16:26,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-05-02 23:16:26,857 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:26,857 INFO L523 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:26,857 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2021-05-02 23:16:26,858 INFO L428 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:26,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:26,858 INFO L82 PathProgramCache]: Analyzing trace with hash 937978883, now seen corresponding path program 35 times [2021-05-02 23:16:26,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:26,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292337244] [2021-05-02 23:16:26,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:26,863 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:26,863 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:27,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:27,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292337244] [2021-05-02 23:16:27,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1292337244] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:27,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:27,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2021-05-02 23:16:27,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181925238] [2021-05-02 23:16:27,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-05-02 23:16:27,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:27,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-05-02 23:16:27,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:27,468 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:27,633 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-05-02 23:16:27,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-05-02 23:16:27,633 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2021-05-02 23:16:27,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:27,634 INFO L225 Difference]: With dead ends: 92 [2021-05-02 23:16:27,634 INFO L226 Difference]: Without dead ends: 86 [2021-05-02 23:16:27,635 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 552.2ms TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2021-05-02 23:16:27,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-05-02 23:16:27,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-05-02 23:16:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-05-02 23:16:27,638 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-05-02 23:16:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:27,638 INFO L480 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-05-02 23:16:27,638 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 38 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-05-02 23:16:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-05-02 23:16:27,639 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:27,639 INFO L523 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:27,639 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2021-05-02 23:16:27,639 INFO L428 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:27,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:27,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1386147227, now seen corresponding path program 36 times [2021-05-02 23:16:27,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:27,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214105558] [2021-05-02 23:16:27,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:27,643 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:27,644 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,300 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:28,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:28,309 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:28,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214105558] [2021-05-02 23:16:28,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214105558] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:28,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:28,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2021-05-02 23:16:28,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640567492] [2021-05-02 23:16:28,311 INFO L460 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-05-02 23:16:28,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:28,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-05-02 23:16:28,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:28,312 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:28,487 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-05-02 23:16:28,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-05-02 23:16:28,487 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2021-05-02 23:16:28,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:28,488 INFO L225 Difference]: With dead ends: 94 [2021-05-02 23:16:28,488 INFO L226 Difference]: Without dead ends: 88 [2021-05-02 23:16:28,488 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 593.7ms TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2021-05-02 23:16:28,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-05-02 23:16:28,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-05-02 23:16:28,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-05-02 23:16:28,491 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-05-02 23:16:28,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:28,492 INFO L480 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-05-02 23:16:28,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.0) internal successors, (80), 39 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:28,492 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-05-02 23:16:28,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-05-02 23:16:28,492 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:28,492 INFO L523 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:28,492 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2021-05-02 23:16:28,493 INFO L428 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:28,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:28,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1488345017, now seen corresponding path program 37 times [2021-05-02 23:16:28,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:28,493 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551806147] [2021-05-02 23:16:28,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:28,498 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:28,498 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:28,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:29,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:29,210 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:29,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551806147] [2021-05-02 23:16:29,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1551806147] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:29,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:29,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2021-05-02 23:16:29,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082200849] [2021-05-02 23:16:29,211 INFO L460 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-05-02 23:16:29,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:29,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-05-02 23:16:29,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:29,212 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:29,345 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-05-02 23:16:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-05-02 23:16:29,345 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2021-05-02 23:16:29,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:29,346 INFO L225 Difference]: With dead ends: 96 [2021-05-02 23:16:29,346 INFO L226 Difference]: Without dead ends: 90 [2021-05-02 23:16:29,347 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 649.5ms TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2021-05-02 23:16:29,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-05-02 23:16:29,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-05-02 23:16:29,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-05-02 23:16:29,350 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-05-02 23:16:29,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:29,350 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-05-02 23:16:29,350 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.0) internal successors, (82), 40 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:29,351 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-05-02 23:16:29,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-05-02 23:16:29,351 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:29,351 INFO L523 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:29,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2021-05-02 23:16:29,351 INFO L428 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:29,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:29,351 INFO L82 PathProgramCache]: Analyzing trace with hash -916173399, now seen corresponding path program 38 times [2021-05-02 23:16:29,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:29,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [299295154] [2021-05-02 23:16:29,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:29,356 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:29,357 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:29,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:30,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:30,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:30,102 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:30,102 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [299295154] [2021-05-02 23:16:30,102 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [299295154] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:30,102 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:30,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2021-05-02 23:16:30,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144796554] [2021-05-02 23:16:30,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-05-02 23:16:30,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:30,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-05-02 23:16:30,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:30,104 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:30,316 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-05-02 23:16:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-05-02 23:16:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2021-05-02 23:16:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:30,317 INFO L225 Difference]: With dead ends: 98 [2021-05-02 23:16:30,317 INFO L226 Difference]: Without dead ends: 92 [2021-05-02 23:16:30,318 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2021-05-02 23:16:30,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-05-02 23:16:30,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-05-02 23:16:30,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-05-02 23:16:30,322 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-05-02 23:16:30,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:30,322 INFO L480 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-05-02 23:16:30,322 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.0) internal successors, (84), 41 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:30,322 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-05-02 23:16:30,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-05-02 23:16:30,323 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:30,323 INFO L523 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:30,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2021-05-02 23:16:30,323 INFO L428 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:30,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:30,323 INFO L82 PathProgramCache]: Analyzing trace with hash -815062389, now seen corresponding path program 39 times [2021-05-02 23:16:30,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:30,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [881603807] [2021-05-02 23:16:30,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:30,328 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:30,329 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:30,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:31,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:31,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:31,089 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:31,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [881603807] [2021-05-02 23:16:31,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [881603807] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:31,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:31,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2021-05-02 23:16:31,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721146400] [2021-05-02 23:16:31,089 INFO L460 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-05-02 23:16:31,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:31,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-05-02 23:16:31,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:31,090 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:31,241 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-05-02 23:16:31,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-05-02 23:16:31,241 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 90 [2021-05-02 23:16:31,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:31,242 INFO L225 Difference]: With dead ends: 100 [2021-05-02 23:16:31,242 INFO L226 Difference]: Without dead ends: 94 [2021-05-02 23:16:31,243 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 688.4ms TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2021-05-02 23:16:31,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-05-02 23:16:31,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-05-02 23:16:31,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-05-02 23:16:31,248 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-05-02 23:16:31,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:31,248 INFO L480 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-05-02 23:16:31,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.0) internal successors, (86), 42 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:31,249 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-05-02 23:16:31,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-05-02 23:16:31,249 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:31,249 INFO L523 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:31,249 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-05-02 23:16:31,249 INFO L428 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:31,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:31,250 INFO L82 PathProgramCache]: Analyzing trace with hash 1863337709, now seen corresponding path program 40 times [2021-05-02 23:16:31,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:31,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [92179536] [2021-05-02 23:16:31,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:31,255 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:31,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:31,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:32,045 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:32,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [92179536] [2021-05-02 23:16:32,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [92179536] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:32,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:32,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2021-05-02 23:16:32,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256149859] [2021-05-02 23:16:32,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 44 states [2021-05-02 23:16:32,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:32,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-05-02 23:16:32,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:32,047 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:32,170 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-05-02 23:16:32,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-05-02 23:16:32,170 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2021-05-02 23:16:32,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:32,172 INFO L225 Difference]: With dead ends: 102 [2021-05-02 23:16:32,172 INFO L226 Difference]: Without dead ends: 96 [2021-05-02 23:16:32,173 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 705.8ms TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2021-05-02 23:16:32,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-05-02 23:16:32,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-05-02 23:16:32,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-05-02 23:16:32,176 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-05-02 23:16:32,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:32,177 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-05-02 23:16:32,177 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 44 states, 44 states have (on average 2.0) internal successors, (88), 43 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:32,177 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-05-02 23:16:32,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-05-02 23:16:32,177 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:32,177 INFO L523 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:32,178 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2021-05-02 23:16:32,178 INFO L428 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:32,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:32,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1174545713, now seen corresponding path program 41 times [2021-05-02 23:16:32,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:32,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [63629758] [2021-05-02 23:16:32,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:32,184 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:32,185 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:32,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:32,998 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:32,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:33,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:33,002 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:33,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [63629758] [2021-05-02 23:16:33,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [63629758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:33,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:33,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2021-05-02 23:16:33,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149244449] [2021-05-02 23:16:33,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-05-02 23:16:33,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:33,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-05-02 23:16:33,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:33,003 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:33,206 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-05-02 23:16:33,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-05-02 23:16:33,206 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2021-05-02 23:16:33,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:33,207 INFO L225 Difference]: With dead ends: 104 [2021-05-02 23:16:33,207 INFO L226 Difference]: Without dead ends: 98 [2021-05-02 23:16:33,208 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 756.5ms TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2021-05-02 23:16:33,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-05-02 23:16:33,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-05-02 23:16:33,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-05-02 23:16:33,212 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-05-02 23:16:33,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:33,213 INFO L480 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-05-02 23:16:33,214 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.0) internal successors, (90), 44 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:33,214 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-05-02 23:16:33,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-05-02 23:16:33,215 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:33,215 INFO L523 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:33,215 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2021-05-02 23:16:33,215 INFO L428 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash -2752975, now seen corresponding path program 42 times [2021-05-02 23:16:33,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:33,216 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230040674] [2021-05-02 23:16:33,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:33,220 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:33,221 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:34,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:34,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:34,143 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:34,143 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230040674] [2021-05-02 23:16:34,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1230040674] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:34,144 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:34,144 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2021-05-02 23:16:34,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578945060] [2021-05-02 23:16:34,144 INFO L460 AbstractCegarLoop]: Interpolant automaton has 46 states [2021-05-02 23:16:34,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:34,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-05-02 23:16:34,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:34,146 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:34,349 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-05-02 23:16:34,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-05-02 23:16:34,350 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2021-05-02 23:16:34,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:34,351 INFO L225 Difference]: With dead ends: 106 [2021-05-02 23:16:34,351 INFO L226 Difference]: Without dead ends: 100 [2021-05-02 23:16:34,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 860.3ms TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2021-05-02 23:16:34,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-05-02 23:16:34,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-05-02 23:16:34,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-05-02 23:16:34,355 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-05-02 23:16:34,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:34,355 INFO L480 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-05-02 23:16:34,356 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 46 states, 46 states have (on average 2.0) internal successors, (92), 45 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:34,356 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-05-02 23:16:34,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-05-02 23:16:34,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:34,356 INFO L523 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:34,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2021-05-02 23:16:34,356 INFO L428 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:34,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:34,357 INFO L82 PathProgramCache]: Analyzing trace with hash 808636691, now seen corresponding path program 43 times [2021-05-02 23:16:34,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:34,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901586062] [2021-05-02 23:16:34,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:34,363 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:34,364 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:34,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:35,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:35,254 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:35,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901586062] [2021-05-02 23:16:35,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [901586062] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:35,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:35,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2021-05-02 23:16:35,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429927919] [2021-05-02 23:16:35,254 INFO L460 AbstractCegarLoop]: Interpolant automaton has 47 states [2021-05-02 23:16:35,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:35,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-05-02 23:16:35,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:35,255 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:35,421 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-05-02 23:16:35,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-05-02 23:16:35,421 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2021-05-02 23:16:35,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:35,422 INFO L225 Difference]: With dead ends: 108 [2021-05-02 23:16:35,422 INFO L226 Difference]: Without dead ends: 102 [2021-05-02 23:16:35,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 826.1ms TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2021-05-02 23:16:35,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-05-02 23:16:35,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-05-02 23:16:35,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-05-02 23:16:35,426 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-05-02 23:16:35,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:35,427 INFO L480 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-05-02 23:16:35,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 47 states, 47 states have (on average 2.0) internal successors, (94), 46 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:35,427 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-05-02 23:16:35,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-05-02 23:16:35,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:35,427 INFO L523 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:35,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2021-05-02 23:16:35,428 INFO L428 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:35,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:35,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1129942155, now seen corresponding path program 44 times [2021-05-02 23:16:35,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:35,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340844169] [2021-05-02 23:16:35,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:35,443 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:35,444 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:36,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:36,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:36,448 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:36,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340844169] [2021-05-02 23:16:36,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [340844169] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:36,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:36,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2021-05-02 23:16:36,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463080876] [2021-05-02 23:16:36,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 48 states [2021-05-02 23:16:36,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:36,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-05-02 23:16:36,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:36,449 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:36,639 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-05-02 23:16:36,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-05-02 23:16:36,639 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 100 [2021-05-02 23:16:36,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:36,640 INFO L225 Difference]: With dead ends: 110 [2021-05-02 23:16:36,640 INFO L226 Difference]: Without dead ends: 104 [2021-05-02 23:16:36,641 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 938.5ms TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2021-05-02 23:16:36,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-05-02 23:16:36,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-05-02 23:16:36,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-05-02 23:16:36,644 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-05-02 23:16:36,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:36,644 INFO L480 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-05-02 23:16:36,645 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 48 states, 48 states have (on average 2.0) internal successors, (96), 47 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:36,645 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-05-02 23:16:36,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-05-02 23:16:36,645 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:36,645 INFO L523 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:36,645 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2021-05-02 23:16:36,645 INFO L428 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:36,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:36,646 INFO L82 PathProgramCache]: Analyzing trace with hash -88406697, now seen corresponding path program 45 times [2021-05-02 23:16:36,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:36,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [608361746] [2021-05-02 23:16:36,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:36,654 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:36,655 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:36,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,580 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:37,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:37,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:37,585 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:37,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [608361746] [2021-05-02 23:16:37,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [608361746] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:37,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:37,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2021-05-02 23:16:37,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536436227] [2021-05-02 23:16:37,585 INFO L460 AbstractCegarLoop]: Interpolant automaton has 49 states [2021-05-02 23:16:37,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:37,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-05-02 23:16:37,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:37,586 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:37,830 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-05-02 23:16:37,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-05-02 23:16:37,830 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2021-05-02 23:16:37,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:37,831 INFO L225 Difference]: With dead ends: 112 [2021-05-02 23:16:37,831 INFO L226 Difference]: Without dead ends: 106 [2021-05-02 23:16:37,831 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 871.3ms TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2021-05-02 23:16:37,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-05-02 23:16:37,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-05-02 23:16:37,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-05-02 23:16:37,834 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-05-02 23:16:37,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:37,835 INFO L480 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-05-02 23:16:37,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 49 states, 49 states have (on average 2.0) internal successors, (98), 48 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:37,835 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-05-02 23:16:37,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-05-02 23:16:37,835 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:37,835 INFO L523 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:37,836 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2021-05-02 23:16:37,836 INFO L428 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:37,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:37,836 INFO L82 PathProgramCache]: Analyzing trace with hash 99788473, now seen corresponding path program 46 times [2021-05-02 23:16:37,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:37,836 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598340533] [2021-05-02 23:16:37,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:37,841 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:37,843 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:37,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,812 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:38,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:38,825 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:38,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598340533] [2021-05-02 23:16:38,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598340533] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:38,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:38,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2021-05-02 23:16:38,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586037214] [2021-05-02 23:16:38,826 INFO L460 AbstractCegarLoop]: Interpolant automaton has 50 states [2021-05-02 23:16:38,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:38,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-05-02 23:16:38,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:38,827 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:39,028 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-05-02 23:16:39,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-05-02 23:16:39,029 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2021-05-02 23:16:39,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:39,029 INFO L225 Difference]: With dead ends: 114 [2021-05-02 23:16:39,029 INFO L226 Difference]: Without dead ends: 108 [2021-05-02 23:16:39,030 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 915.3ms TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2021-05-02 23:16:39,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-05-02 23:16:39,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-05-02 23:16:39,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-05-02 23:16:39,033 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-05-02 23:16:39,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:39,033 INFO L480 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-05-02 23:16:39,033 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 50 states, 50 states have (on average 2.0) internal successors, (100), 49 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:39,033 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-05-02 23:16:39,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-05-02 23:16:39,034 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:39,034 INFO L523 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:39,034 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2021-05-02 23:16:39,034 INFO L428 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:39,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:39,034 INFO L82 PathProgramCache]: Analyzing trace with hash 566720411, now seen corresponding path program 47 times [2021-05-02 23:16:39,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:39,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1387310350] [2021-05-02 23:16:39,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:39,040 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:39,041 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:40,049 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:40,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1387310350] [2021-05-02 23:16:40,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1387310350] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:40,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:40,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2021-05-02 23:16:40,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039833170] [2021-05-02 23:16:40,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 51 states [2021-05-02 23:16:40,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:40,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-05-02 23:16:40,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:40,051 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:40,213 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-05-02 23:16:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-05-02 23:16:40,214 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 106 [2021-05-02 23:16:40,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:40,214 INFO L225 Difference]: With dead ends: 116 [2021-05-02 23:16:40,214 INFO L226 Difference]: Without dead ends: 110 [2021-05-02 23:16:40,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 945.3ms TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2021-05-02 23:16:40,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-05-02 23:16:40,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-05-02 23:16:40,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-05-02 23:16:40,218 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-05-02 23:16:40,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:40,218 INFO L480 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-05-02 23:16:40,219 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 51 states, 51 states have (on average 2.0) internal successors, (102), 50 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:40,219 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-05-02 23:16:40,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-05-02 23:16:40,219 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:40,219 INFO L523 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:40,219 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2021-05-02 23:16:40,219 INFO L428 AbstractCegarLoop]: === Iteration 50 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash -1683253251, now seen corresponding path program 48 times [2021-05-02 23:16:40,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:40,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [396910910] [2021-05-02 23:16:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:40,225 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:40,225 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:40,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:41,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:41,307 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:41,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [396910910] [2021-05-02 23:16:41,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [396910910] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:41,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:41,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2021-05-02 23:16:41,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658701366] [2021-05-02 23:16:41,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 52 states [2021-05-02 23:16:41,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:41,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-05-02 23:16:41,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:41,308 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:41,471 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-05-02 23:16:41,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-02 23:16:41,471 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2021-05-02 23:16:41,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:41,472 INFO L225 Difference]: With dead ends: 118 [2021-05-02 23:16:41,472 INFO L226 Difference]: Without dead ends: 112 [2021-05-02 23:16:41,474 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1003.1ms TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2021-05-02 23:16:41,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-05-02 23:16:41,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-05-02 23:16:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-05-02 23:16:41,477 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-05-02 23:16:41,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:41,477 INFO L480 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-05-02 23:16:41,478 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 52 states, 52 states have (on average 2.0) internal successors, (104), 51 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-05-02 23:16:41,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-05-02 23:16:41,478 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:41,478 INFO L523 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:41,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2021-05-02 23:16:41,478 INFO L428 AbstractCegarLoop]: === Iteration 51 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:41,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:41,479 INFO L82 PathProgramCache]: Analyzing trace with hash 755574751, now seen corresponding path program 49 times [2021-05-02 23:16:41,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:41,479 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732701755] [2021-05-02 23:16:41,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:41,482 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:41,484 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:41,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,569 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:42,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:42,579 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:42,579 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:42,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732701755] [2021-05-02 23:16:42,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1732701755] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:42,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:42,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2021-05-02 23:16:42,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168728503] [2021-05-02 23:16:42,580 INFO L460 AbstractCegarLoop]: Interpolant automaton has 53 states [2021-05-02 23:16:42,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:42,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-05-02 23:16:42,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:42,581 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:42,734 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-05-02 23:16:42,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-05-02 23:16:42,735 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2021-05-02 23:16:42,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:42,736 INFO L225 Difference]: With dead ends: 120 [2021-05-02 23:16:42,736 INFO L226 Difference]: Without dead ends: 114 [2021-05-02 23:16:42,736 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1028.1ms TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2021-05-02 23:16:42,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-05-02 23:16:42,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-05-02 23:16:42,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-05-02 23:16:42,740 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-05-02 23:16:42,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:42,740 INFO L480 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-05-02 23:16:42,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 53 states, 53 states have (on average 2.0) internal successors, (106), 52 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:42,740 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-05-02 23:16:42,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-05-02 23:16:42,741 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:42,741 INFO L523 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:42,741 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2021-05-02 23:16:42,741 INFO L428 AbstractCegarLoop]: === Iteration 52 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:42,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:42,741 INFO L82 PathProgramCache]: Analyzing trace with hash -582858943, now seen corresponding path program 50 times [2021-05-02 23:16:42,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:42,742 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [575420255] [2021-05-02 23:16:42,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:42,746 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:42,747 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:42,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:43,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:43,952 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:43,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [575420255] [2021-05-02 23:16:43,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [575420255] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:43,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:43,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2021-05-02 23:16:43,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267462504] [2021-05-02 23:16:43,952 INFO L460 AbstractCegarLoop]: Interpolant automaton has 54 states [2021-05-02 23:16:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:43,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-05-02 23:16:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:43,953 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:44,118 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-05-02 23:16:44,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-02 23:16:44,119 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 112 [2021-05-02 23:16:44,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:44,119 INFO L225 Difference]: With dead ends: 122 [2021-05-02 23:16:44,119 INFO L226 Difference]: Without dead ends: 116 [2021-05-02 23:16:44,120 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1146.9ms TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2021-05-02 23:16:44,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-05-02 23:16:44,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-05-02 23:16:44,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-05-02 23:16:44,123 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-05-02 23:16:44,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:44,123 INFO L480 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-05-02 23:16:44,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 54 states, 54 states have (on average 2.0) internal successors, (108), 53 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:44,124 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-05-02 23:16:44,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-05-02 23:16:44,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:44,124 INFO L523 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:44,124 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2021-05-02 23:16:44,124 INFO L428 AbstractCegarLoop]: === Iteration 53 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:44,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:44,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1672549923, now seen corresponding path program 51 times [2021-05-02 23:16:44,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:44,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676291664] [2021-05-02 23:16:44,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:44,130 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:44,131 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:45,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:45,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:45,345 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:45,345 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676291664] [2021-05-02 23:16:45,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [676291664] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:45,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:45,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2021-05-02 23:16:45,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893793093] [2021-05-02 23:16:45,346 INFO L460 AbstractCegarLoop]: Interpolant automaton has 55 states [2021-05-02 23:16:45,346 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:45,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-05-02 23:16:45,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:45,347 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:45,572 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-05-02 23:16:45,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-05-02 23:16:45,573 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2021-05-02 23:16:45,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:45,573 INFO L225 Difference]: With dead ends: 124 [2021-05-02 23:16:45,574 INFO L226 Difference]: Without dead ends: 118 [2021-05-02 23:16:45,574 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1154.8ms TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2021-05-02 23:16:45,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-05-02 23:16:45,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-05-02 23:16:45,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-05-02 23:16:45,577 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-05-02 23:16:45,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:45,577 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-05-02 23:16:45,578 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 55 states, 55 states have (on average 2.0) internal successors, (110), 54 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:45,578 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-05-02 23:16:45,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-05-02 23:16:45,578 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:45,578 INFO L523 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:45,579 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2021-05-02 23:16:45,579 INFO L428 AbstractCegarLoop]: === Iteration 54 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:45,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:45,579 INFO L82 PathProgramCache]: Analyzing trace with hash 161985669, now seen corresponding path program 52 times [2021-05-02 23:16:45,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:45,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568117073] [2021-05-02 23:16:45,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:45,583 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:45,584 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:46,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:46,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:46,826 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:46,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568117073] [2021-05-02 23:16:46,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568117073] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:46,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:46,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2021-05-02 23:16:46,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864970156] [2021-05-02 23:16:46,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 56 states [2021-05-02 23:16:46,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:46,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-05-02 23:16:46,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:46,828 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:47,095 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-05-02 23:16:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-05-02 23:16:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2021-05-02 23:16:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:47,096 INFO L225 Difference]: With dead ends: 126 [2021-05-02 23:16:47,096 INFO L226 Difference]: Without dead ends: 120 [2021-05-02 23:16:47,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1174.0ms TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2021-05-02 23:16:47,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-05-02 23:16:47,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-05-02 23:16:47,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-05-02 23:16:47,103 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-05-02 23:16:47,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:47,103 INFO L480 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-05-02 23:16:47,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 56 states, 56 states have (on average 2.0) internal successors, (112), 55 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:47,103 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-05-02 23:16:47,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-05-02 23:16:47,104 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:47,104 INFO L523 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:47,104 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2021-05-02 23:16:47,104 INFO L428 AbstractCegarLoop]: === Iteration 55 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash 208683623, now seen corresponding path program 53 times [2021-05-02 23:16:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240335197] [2021-05-02 23:16:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:47,112 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:47,113 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:47,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:48,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:48,391 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:48,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240335197] [2021-05-02 23:16:48,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240335197] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:48,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:48,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2021-05-02 23:16:48,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290435151] [2021-05-02 23:16:48,392 INFO L460 AbstractCegarLoop]: Interpolant automaton has 57 states [2021-05-02 23:16:48,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:48,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-05-02 23:16:48,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:48,392 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:48,621 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-05-02 23:16:48,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-05-02 23:16:48,621 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 118 [2021-05-02 23:16:48,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:48,622 INFO L225 Difference]: With dead ends: 128 [2021-05-02 23:16:48,622 INFO L226 Difference]: Without dead ends: 122 [2021-05-02 23:16:48,622 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1215.9ms TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2021-05-02 23:16:48,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-05-02 23:16:48,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-05-02 23:16:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-05-02 23:16:48,625 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-05-02 23:16:48,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:48,625 INFO L480 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-05-02 23:16:48,625 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 57 states, 57 states have (on average 2.0) internal successors, (114), 56 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:48,625 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-05-02 23:16:48,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-05-02 23:16:48,625 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:48,625 INFO L523 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:48,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-05-02 23:16:48,625 INFO L428 AbstractCegarLoop]: === Iteration 56 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:48,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:48,626 INFO L82 PathProgramCache]: Analyzing trace with hash 2135744457, now seen corresponding path program 54 times [2021-05-02 23:16:48,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:48,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722834023] [2021-05-02 23:16:48,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:48,642 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:48,642 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:48,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:50,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:50,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:50,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:50,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722834023] [2021-05-02 23:16:50,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [722834023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:50,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:50,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2021-05-02 23:16:50,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618522150] [2021-05-02 23:16:50,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 58 states [2021-05-02 23:16:50,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-05-02 23:16:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:50,018 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:50,234 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-05-02 23:16:50,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-02 23:16:50,235 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2021-05-02 23:16:50,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:50,235 INFO L225 Difference]: With dead ends: 130 [2021-05-02 23:16:50,235 INFO L226 Difference]: Without dead ends: 124 [2021-05-02 23:16:50,236 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1310.5ms TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2021-05-02 23:16:50,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-05-02 23:16:50,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-05-02 23:16:50,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-05-02 23:16:50,239 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-05-02 23:16:50,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:50,239 INFO L480 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-05-02 23:16:50,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 58 states, 58 states have (on average 2.0) internal successors, (116), 57 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:50,239 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-05-02 23:16:50,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-05-02 23:16:50,240 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:50,240 INFO L523 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:50,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2021-05-02 23:16:50,240 INFO L428 AbstractCegarLoop]: === Iteration 57 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:50,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:50,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1384665941, now seen corresponding path program 55 times [2021-05-02 23:16:50,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:50,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816586031] [2021-05-02 23:16:50,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:50,245 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:50,246 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:50,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,613 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:51,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:51,626 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:51,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816586031] [2021-05-02 23:16:51,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816586031] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:51,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:51,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2021-05-02 23:16:51,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939475229] [2021-05-02 23:16:51,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 59 states [2021-05-02 23:16:51,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-05-02 23:16:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:51,627 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:51,890 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-05-02 23:16:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-05-02 23:16:51,890 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2021-05-02 23:16:51,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:51,891 INFO L225 Difference]: With dead ends: 132 [2021-05-02 23:16:51,891 INFO L226 Difference]: Without dead ends: 126 [2021-05-02 23:16:51,892 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1305.8ms TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2021-05-02 23:16:51,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-05-02 23:16:51,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-05-02 23:16:51,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-05-02 23:16:51,895 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-05-02 23:16:51,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:51,895 INFO L480 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-05-02 23:16:51,895 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 59 states, 59 states have (on average 2.0) internal successors, (118), 58 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:51,895 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-05-02 23:16:51,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-05-02 23:16:51,896 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:51,896 INFO L523 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:51,896 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2021-05-02 23:16:51,896 INFO L428 AbstractCegarLoop]: === Iteration 58 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:51,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:51,897 INFO L82 PathProgramCache]: Analyzing trace with hash -64829171, now seen corresponding path program 56 times [2021-05-02 23:16:51,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:51,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503393556] [2021-05-02 23:16:51,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:51,900 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:51,901 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,306 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:53,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:53,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:53,320 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:53,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503393556] [2021-05-02 23:16:53,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [503393556] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:53,320 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:53,320 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2021-05-02 23:16:53,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855195461] [2021-05-02 23:16:53,320 INFO L460 AbstractCegarLoop]: Interpolant automaton has 60 states [2021-05-02 23:16:53,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:53,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-05-02 23:16:53,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:53,321 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:53,493 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-05-02 23:16:53,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-05-02 23:16:53,494 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2021-05-02 23:16:53,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:53,495 INFO L225 Difference]: With dead ends: 134 [2021-05-02 23:16:53,495 INFO L226 Difference]: Without dead ends: 128 [2021-05-02 23:16:53,495 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1344.1ms TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2021-05-02 23:16:53,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-05-02 23:16:53,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-05-02 23:16:53,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-05-02 23:16:53,499 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-05-02 23:16:53,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:53,499 INFO L480 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-05-02 23:16:53,499 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 60 states, 60 states have (on average 2.0) internal successors, (120), 59 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:53,499 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-05-02 23:16:53,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-05-02 23:16:53,500 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:53,500 INFO L523 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:53,500 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2021-05-02 23:16:53,500 INFO L428 AbstractCegarLoop]: === Iteration 59 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1282954479, now seen corresponding path program 57 times [2021-05-02 23:16:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:53,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1779356919] [2021-05-02 23:16:53,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:53,504 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:53,505 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:53,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:54,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:54,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:54,948 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:54,948 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1779356919] [2021-05-02 23:16:54,949 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1779356919] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:54,949 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:54,949 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2021-05-02 23:16:54,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676626043] [2021-05-02 23:16:54,949 INFO L460 AbstractCegarLoop]: Interpolant automaton has 61 states [2021-05-02 23:16:54,949 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:54,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-05-02 23:16:54,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:54,950 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:55,199 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-05-02 23:16:55,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-05-02 23:16:55,199 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2021-05-02 23:16:55,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:55,200 INFO L225 Difference]: With dead ends: 136 [2021-05-02 23:16:55,200 INFO L226 Difference]: Without dead ends: 130 [2021-05-02 23:16:55,200 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1378.2ms TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2021-05-02 23:16:55,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-05-02 23:16:55,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-05-02 23:16:55,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-05-02 23:16:55,203 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-05-02 23:16:55,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:55,204 INFO L480 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-05-02 23:16:55,204 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 61 states, 61 states have (on average 2.0) internal successors, (122), 60 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:55,204 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-05-02 23:16:55,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-05-02 23:16:55,204 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:55,205 INFO L523 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:55,205 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2021-05-02 23:16:55,205 INFO L428 AbstractCegarLoop]: === Iteration 60 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:55,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:55,205 INFO L82 PathProgramCache]: Analyzing trace with hash -577081263, now seen corresponding path program 58 times [2021-05-02 23:16:55,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:55,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2077192416] [2021-05-02 23:16:55,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:55,209 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:55,210 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,687 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:56,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:56,693 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:56,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2077192416] [2021-05-02 23:16:56,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2077192416] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:56,693 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:56,693 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2021-05-02 23:16:56,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461315110] [2021-05-02 23:16:56,693 INFO L460 AbstractCegarLoop]: Interpolant automaton has 62 states [2021-05-02 23:16:56,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:56,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-05-02 23:16:56,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:56,694 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:56,933 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-05-02 23:16:56,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-05-02 23:16:56,936 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2021-05-02 23:16:56,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:56,937 INFO L225 Difference]: With dead ends: 138 [2021-05-02 23:16:56,937 INFO L226 Difference]: Without dead ends: 132 [2021-05-02 23:16:56,937 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1406.5ms TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2021-05-02 23:16:56,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-05-02 23:16:56,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-05-02 23:16:56,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-05-02 23:16:56,940 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-05-02 23:16:56,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:56,941 INFO L480 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-05-02 23:16:56,941 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 62 states, 62 states have (on average 2.0) internal successors, (124), 61 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:56,941 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-05-02 23:16:56,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-05-02 23:16:56,941 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:56,941 INFO L523 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:56,942 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2021-05-02 23:16:56,942 INFO L428 AbstractCegarLoop]: === Iteration 61 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:56,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:56,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1365034189, now seen corresponding path program 59 times [2021-05-02 23:16:56,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:56,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [840490733] [2021-05-02 23:16:56,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:56,946 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:56,947 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:56,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:16:58,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:16:58,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:16:58,500 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:16:58,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [840490733] [2021-05-02 23:16:58,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [840490733] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:16:58,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:16:58,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2021-05-02 23:16:58,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757103748] [2021-05-02 23:16:58,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 63 states [2021-05-02 23:16:58,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:16:58,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-05-02 23:16:58,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:16:58,501 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:16:58,682 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-05-02 23:16:58,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-05-02 23:16:58,683 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 130 [2021-05-02 23:16:58,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:16:58,684 INFO L225 Difference]: With dead ends: 140 [2021-05-02 23:16:58,684 INFO L226 Difference]: Without dead ends: 134 [2021-05-02 23:16:58,684 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1487.3ms TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2021-05-02 23:16:58,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-05-02 23:16:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-05-02 23:16:58,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.0078125) internal successors, (129), 128 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-05-02 23:16:58,687 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-05-02 23:16:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:16:58,687 INFO L480 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-05-02 23:16:58,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 63 states, 63 states have (on average 2.0) internal successors, (126), 62 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:16:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-05-02 23:16:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-05-02 23:16:58,688 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:16:58,688 INFO L523 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:16:58,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2021-05-02 23:16:58,688 INFO L428 AbstractCegarLoop]: === Iteration 62 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:16:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:16:58,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1621415317, now seen corresponding path program 60 times [2021-05-02 23:16:58,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:16:58,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1651691193] [2021-05-02 23:16:58,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:16:58,707 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:16:58,708 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:16:58,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:00,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:00,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:00,360 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:00,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1651691193] [2021-05-02 23:17:00,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1651691193] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:00,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:00,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2021-05-02 23:17:00,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443710921] [2021-05-02 23:17:00,361 INFO L460 AbstractCegarLoop]: Interpolant automaton has 64 states [2021-05-02 23:17:00,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:00,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-05-02 23:17:00,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:00,361 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:00,623 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-05-02 23:17:00,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-02 23:17:00,623 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2021-05-02 23:17:00,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:00,624 INFO L225 Difference]: With dead ends: 142 [2021-05-02 23:17:00,624 INFO L226 Difference]: Without dead ends: 136 [2021-05-02 23:17:00,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1586.9ms TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2021-05-02 23:17:00,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-05-02 23:17:00,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-05-02 23:17:00,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-05-02 23:17:00,628 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-05-02 23:17:00,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:00,628 INFO L480 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-05-02 23:17:00,628 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 64 states, 64 states have (on average 2.0) internal successors, (128), 63 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:00,629 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-05-02 23:17:00,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-05-02 23:17:00,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:00,629 INFO L523 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:00,629 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2021-05-02 23:17:00,629 INFO L428 AbstractCegarLoop]: === Iteration 63 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:00,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:00,630 INFO L82 PathProgramCache]: Analyzing trace with hash -1733730441, now seen corresponding path program 61 times [2021-05-02 23:17:00,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:00,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1172506141] [2021-05-02 23:17:00,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:00,633 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:00,634 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:00,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:02,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:02,359 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:02,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1172506141] [2021-05-02 23:17:02,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1172506141] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:02,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:02,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2021-05-02 23:17:02,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979810802] [2021-05-02 23:17:02,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 65 states [2021-05-02 23:17:02,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:02,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-05-02 23:17:02,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:02,360 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:02,616 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-05-02 23:17:02,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-05-02 23:17:02,617 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2021-05-02 23:17:02,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:02,617 INFO L225 Difference]: With dead ends: 144 [2021-05-02 23:17:02,617 INFO L226 Difference]: Without dead ends: 138 [2021-05-02 23:17:02,618 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1656.6ms TimeCoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2021-05-02 23:17:02,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-05-02 23:17:02,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-05-02 23:17:02,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-05-02 23:17:02,620 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-05-02 23:17:02,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:02,620 INFO L480 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-05-02 23:17:02,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 65 states, 65 states have (on average 2.0) internal successors, (130), 64 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:02,620 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-05-02 23:17:02,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-05-02 23:17:02,621 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:02,621 INFO L523 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:02,621 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2021-05-02 23:17:02,621 INFO L428 AbstractCegarLoop]: === Iteration 64 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:02,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:02,621 INFO L82 PathProgramCache]: Analyzing trace with hash -508364583, now seen corresponding path program 62 times [2021-05-02 23:17:02,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:02,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226289384] [2021-05-02 23:17:02,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:02,633 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:02,634 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:02,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,330 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:04,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:04,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:04,337 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:04,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226289384] [2021-05-02 23:17:04,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226289384] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:04,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:04,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2021-05-02 23:17:04,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833354980] [2021-05-02 23:17:04,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 66 states [2021-05-02 23:17:04,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:04,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-05-02 23:17:04,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:04,339 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:04,613 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-05-02 23:17:04,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-05-02 23:17:04,613 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 136 [2021-05-02 23:17:04,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:04,614 INFO L225 Difference]: With dead ends: 146 [2021-05-02 23:17:04,614 INFO L226 Difference]: Without dead ends: 140 [2021-05-02 23:17:04,614 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1630.7ms TimeCoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2021-05-02 23:17:04,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-05-02 23:17:04,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-05-02 23:17:04,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-05-02 23:17:04,617 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-05-02 23:17:04,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:04,618 INFO L480 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-05-02 23:17:04,618 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 66 states, 66 states have (on average 2.0) internal successors, (132), 65 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:04,618 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-05-02 23:17:04,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-05-02 23:17:04,618 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:04,618 INFO L523 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:04,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2021-05-02 23:17:04,619 INFO L428 AbstractCegarLoop]: === Iteration 65 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:04,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:04,619 INFO L82 PathProgramCache]: Analyzing trace with hash 247185851, now seen corresponding path program 63 times [2021-05-02 23:17:04,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:04,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053490935] [2021-05-02 23:17:04,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:04,625 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:04,625 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:04,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:06,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:06,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:06,369 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:06,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053490935] [2021-05-02 23:17:06,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053490935] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:06,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:06,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2021-05-02 23:17:06,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171214468] [2021-05-02 23:17:06,370 INFO L460 AbstractCegarLoop]: Interpolant automaton has 67 states [2021-05-02 23:17:06,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:06,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-05-02 23:17:06,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:06,371 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:06,689 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-05-02 23:17:06,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-05-02 23:17:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2021-05-02 23:17:06,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:06,690 INFO L225 Difference]: With dead ends: 148 [2021-05-02 23:17:06,690 INFO L226 Difference]: Without dead ends: 142 [2021-05-02 23:17:06,691 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1668.1ms TimeCoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2021-05-02 23:17:06,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-02 23:17:06,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-05-02 23:17:06,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 states have internal predecessors, (137), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-05-02 23:17:06,694 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-05-02 23:17:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:06,694 INFO L480 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-05-02 23:17:06,694 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 67 states, 67 states have (on average 2.0) internal successors, (134), 66 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-05-02 23:17:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-05-02 23:17:06,695 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:06,695 INFO L523 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:06,695 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2021-05-02 23:17:06,695 INFO L428 AbstractCegarLoop]: === Iteration 66 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:06,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:06,696 INFO L82 PathProgramCache]: Analyzing trace with hash 481679901, now seen corresponding path program 64 times [2021-05-02 23:17:06,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:06,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879013946] [2021-05-02 23:17:06,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:06,703 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:06,704 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:08,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:08,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:08,509 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:08,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879013946] [2021-05-02 23:17:08,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [879013946] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:08,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:08,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2021-05-02 23:17:08,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186364143] [2021-05-02 23:17:08,510 INFO L460 AbstractCegarLoop]: Interpolant automaton has 68 states [2021-05-02 23:17:08,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:08,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-05-02 23:17:08,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:08,511 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:08,783 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-05-02 23:17:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-05-02 23:17:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2021-05-02 23:17:08,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:08,784 INFO L225 Difference]: With dead ends: 150 [2021-05-02 23:17:08,784 INFO L226 Difference]: Without dead ends: 144 [2021-05-02 23:17:08,784 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1731.8ms TimeCoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2021-05-02 23:17:08,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-05-02 23:17:08,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-05-02 23:17:08,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-05-02 23:17:08,787 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-05-02 23:17:08,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:08,788 INFO L480 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-05-02 23:17:08,788 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 68 states, 68 states have (on average 2.0) internal successors, (136), 67 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:08,788 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-05-02 23:17:08,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-05-02 23:17:08,788 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:08,789 INFO L523 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:08,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2021-05-02 23:17:08,789 INFO L428 AbstractCegarLoop]: === Iteration 67 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:08,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:08,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1802804737, now seen corresponding path program 65 times [2021-05-02 23:17:08,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:08,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472011016] [2021-05-02 23:17:08,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:08,794 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:08,794 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:08,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:10,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:10,638 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:10,638 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472011016] [2021-05-02 23:17:10,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [472011016] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:10,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:10,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2021-05-02 23:17:10,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057436198] [2021-05-02 23:17:10,639 INFO L460 AbstractCegarLoop]: Interpolant automaton has 69 states [2021-05-02 23:17:10,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:10,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-05-02 23:17:10,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:10,640 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:10,927 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-05-02 23:17:10,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-05-02 23:17:10,927 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 142 [2021-05-02 23:17:10,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:10,928 INFO L225 Difference]: With dead ends: 152 [2021-05-02 23:17:10,928 INFO L226 Difference]: Without dead ends: 146 [2021-05-02 23:17:10,928 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1777.0ms TimeCoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2021-05-02 23:17:10,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-05-02 23:17:10,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-05-02 23:17:10,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-05-02 23:17:10,931 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-05-02 23:17:10,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:10,931 INFO L480 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-05-02 23:17:10,931 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 69 states, 69 states have (on average 2.0) internal successors, (138), 68 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:10,931 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-05-02 23:17:10,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-05-02 23:17:10,932 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:10,932 INFO L523 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:10,932 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2021-05-02 23:17:10,932 INFO L428 AbstractCegarLoop]: === Iteration 68 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:10,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:10,932 INFO L82 PathProgramCache]: Analyzing trace with hash 1830713697, now seen corresponding path program 66 times [2021-05-02 23:17:10,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:10,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68896192] [2021-05-02 23:17:10,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:10,938 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:10,938 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:12,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:12,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:12,877 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:12,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68896192] [2021-05-02 23:17:12,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [68896192] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:12,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:12,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2021-05-02 23:17:12,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223553295] [2021-05-02 23:17:12,878 INFO L460 AbstractCegarLoop]: Interpolant automaton has 70 states [2021-05-02 23:17:12,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:12,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-05-02 23:17:12,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:12,879 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:13,074 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-05-02 23:17:13,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-05-02 23:17:13,074 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2021-05-02 23:17:13,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:13,075 INFO L225 Difference]: With dead ends: 154 [2021-05-02 23:17:13,075 INFO L226 Difference]: Without dead ends: 148 [2021-05-02 23:17:13,075 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 1849.3ms TimeCoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2021-05-02 23:17:13,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-05-02 23:17:13,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-05-02 23:17:13,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-05-02 23:17:13,079 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-05-02 23:17:13,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:13,079 INFO L480 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-05-02 23:17:13,079 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 70 states, 70 states have (on average 2.0) internal successors, (140), 69 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-05-02 23:17:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-05-02 23:17:13,080 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:13,080 INFO L523 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:13,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2021-05-02 23:17:13,080 INFO L428 AbstractCegarLoop]: === Iteration 69 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:13,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:13,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1833517123, now seen corresponding path program 67 times [2021-05-02 23:17:13,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:13,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380139492] [2021-05-02 23:17:13,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:13,094 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:13,094 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:13,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:15,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:15,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:15,132 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:15,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380139492] [2021-05-02 23:17:15,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [380139492] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:15,132 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:15,132 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2021-05-02 23:17:15,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484925065] [2021-05-02 23:17:15,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 71 states [2021-05-02 23:17:15,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:15,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-05-02 23:17:15,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:15,133 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:15,422 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-05-02 23:17:15,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-05-02 23:17:15,422 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2021-05-02 23:17:15,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:15,423 INFO L225 Difference]: With dead ends: 156 [2021-05-02 23:17:15,423 INFO L226 Difference]: Without dead ends: 150 [2021-05-02 23:17:15,423 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1956.9ms TimeCoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2021-05-02 23:17:15,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-05-02 23:17:15,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-05-02 23:17:15,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-05-02 23:17:15,426 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-05-02 23:17:15,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:15,426 INFO L480 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-05-02 23:17:15,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 71 states, 71 states have (on average 2.0) internal successors, (142), 70 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:15,427 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-05-02 23:17:15,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-05-02 23:17:15,427 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:15,427 INFO L523 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:15,427 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2021-05-02 23:17:15,428 INFO L428 AbstractCegarLoop]: === Iteration 70 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:15,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:15,428 INFO L82 PathProgramCache]: Analyzing trace with hash 232642213, now seen corresponding path program 68 times [2021-05-02 23:17:15,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:15,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690346438] [2021-05-02 23:17:15,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:15,431 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:15,432 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:17,445 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:17,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690346438] [2021-05-02 23:17:17,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [690346438] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:17,445 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:17,445 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2021-05-02 23:17:17,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050923376] [2021-05-02 23:17:17,445 INFO L460 AbstractCegarLoop]: Interpolant automaton has 72 states [2021-05-02 23:17:17,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:17,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-05-02 23:17:17,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:17,446 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:17,779 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-05-02 23:17:17,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-05-02 23:17:17,781 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 148 [2021-05-02 23:17:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:17,781 INFO L225 Difference]: With dead ends: 158 [2021-05-02 23:17:17,782 INFO L226 Difference]: Without dead ends: 152 [2021-05-02 23:17:17,782 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1934.2ms TimeCoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2021-05-02 23:17:17,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-02 23:17:17,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-05-02 23:17:17,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-05-02 23:17:17,786 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-05-02 23:17:17,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:17,786 INFO L480 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-05-02 23:17:17,786 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 72 states, 72 states have (on average 2.0) internal successors, (144), 71 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:17,786 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-05-02 23:17:17,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-05-02 23:17:17,787 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:17,787 INFO L523 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:17,787 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2021-05-02 23:17:17,787 INFO L428 AbstractCegarLoop]: === Iteration 71 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:17,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:17,787 INFO L82 PathProgramCache]: Analyzing trace with hash -609854329, now seen corresponding path program 69 times [2021-05-02 23:17:17,787 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:17,788 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95000401] [2021-05-02 23:17:17,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:17,791 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:17,792 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:17,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:19,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:19,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:19,935 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:19,935 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95000401] [2021-05-02 23:17:19,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [95000401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:19,935 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:19,935 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2021-05-02 23:17:19,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144841568] [2021-05-02 23:17:19,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 73 states [2021-05-02 23:17:19,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:19,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-05-02 23:17:19,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:19,936 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:20,140 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-05-02 23:17:20,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-05-02 23:17:20,140 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2021-05-02 23:17:20,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:20,145 INFO L225 Difference]: With dead ends: 160 [2021-05-02 23:17:20,145 INFO L226 Difference]: Without dead ends: 154 [2021-05-02 23:17:20,146 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2031.4ms TimeCoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2021-05-02 23:17:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-05-02 23:17:20,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-05-02 23:17:20,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-05-02 23:17:20,149 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-05-02 23:17:20,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:20,149 INFO L480 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-05-02 23:17:20,150 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 73 states, 73 states have (on average 2.0) internal successors, (146), 72 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:20,150 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-05-02 23:17:20,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-05-02 23:17:20,150 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:20,150 INFO L523 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:20,151 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2021-05-02 23:17:20,151 INFO L428 AbstractCegarLoop]: === Iteration 72 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:20,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:20,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1499787753, now seen corresponding path program 70 times [2021-05-02 23:17:20,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:20,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661850219] [2021-05-02 23:17:20,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:20,155 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:20,156 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:20,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:22,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:22,279 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:22,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661850219] [2021-05-02 23:17:22,279 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661850219] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:22,279 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:22,279 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2021-05-02 23:17:22,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870676981] [2021-05-02 23:17:22,279 INFO L460 AbstractCegarLoop]: Interpolant automaton has 74 states [2021-05-02 23:17:22,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:22,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-05-02 23:17:22,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:22,280 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:22,599 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-05-02 23:17:22,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-02 23:17:22,599 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2021-05-02 23:17:22,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:22,600 INFO L225 Difference]: With dead ends: 162 [2021-05-02 23:17:22,600 INFO L226 Difference]: Without dead ends: 156 [2021-05-02 23:17:22,600 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 2051.2ms TimeCoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2021-05-02 23:17:22,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-05-02 23:17:22,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-05-02 23:17:22,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-05-02 23:17:22,604 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-05-02 23:17:22,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:22,604 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-05-02 23:17:22,604 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 74 states, 74 states have (on average 2.0) internal successors, (148), 73 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:22,604 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-05-02 23:17:22,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-05-02 23:17:22,605 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:22,605 INFO L523 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:22,605 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2021-05-02 23:17:22,605 INFO L428 AbstractCegarLoop]: === Iteration 73 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:22,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:22,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1641264843, now seen corresponding path program 71 times [2021-05-02 23:17:22,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:22,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050493758] [2021-05-02 23:17:22,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:22,609 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:22,610 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:24,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:24,793 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:24,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050493758] [2021-05-02 23:17:24,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050493758] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:24,794 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:24,794 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2021-05-02 23:17:24,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594042183] [2021-05-02 23:17:24,794 INFO L460 AbstractCegarLoop]: Interpolant automaton has 75 states [2021-05-02 23:17:24,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-05-02 23:17:24,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:24,795 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:25,015 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-05-02 23:17:25,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-05-02 23:17:25,016 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2021-05-02 23:17:25,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:25,016 INFO L225 Difference]: With dead ends: 164 [2021-05-02 23:17:25,016 INFO L226 Difference]: Without dead ends: 158 [2021-05-02 23:17:25,017 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 2095.5ms TimeCoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2021-05-02 23:17:25,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-05-02 23:17:25,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-05-02 23:17:25,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-05-02 23:17:25,021 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-05-02 23:17:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:25,021 INFO L480 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-05-02 23:17:25,021 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 75 states, 75 states have (on average 2.0) internal successors, (150), 74 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-05-02 23:17:25,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-05-02 23:17:25,022 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:25,022 INFO L523 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:25,022 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2021-05-02 23:17:25,022 INFO L428 AbstractCegarLoop]: === Iteration 74 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:25,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:25,022 INFO L82 PathProgramCache]: Analyzing trace with hash 161794861, now seen corresponding path program 72 times [2021-05-02 23:17:25,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:25,023 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049160401] [2021-05-02 23:17:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:25,026 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:25,027 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:27,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:27,280 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:27,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049160401] [2021-05-02 23:17:27,280 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2049160401] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:27,280 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:27,280 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2021-05-02 23:17:27,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959309435] [2021-05-02 23:17:27,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 76 states [2021-05-02 23:17:27,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:27,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-05-02 23:17:27,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:27,282 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:27,608 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-05-02 23:17:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-05-02 23:17:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 156 [2021-05-02 23:17:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:27,609 INFO L225 Difference]: With dead ends: 166 [2021-05-02 23:17:27,609 INFO L226 Difference]: Without dead ends: 160 [2021-05-02 23:17:27,609 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 2182.7ms TimeCoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2021-05-02 23:17:27,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-05-02 23:17:27,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-05-02 23:17:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-05-02 23:17:27,613 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-05-02 23:17:27,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:27,613 INFO L480 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-05-02 23:17:27,613 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 76 states, 76 states have (on average 2.0) internal successors, (152), 75 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:27,613 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-05-02 23:17:27,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-05-02 23:17:27,614 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:27,614 INFO L523 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:27,614 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2021-05-02 23:17:27,615 INFO L428 AbstractCegarLoop]: === Iteration 75 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:27,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 25317135, now seen corresponding path program 73 times [2021-05-02 23:17:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:27,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817086228] [2021-05-02 23:17:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:27,619 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:27,619 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:27,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:29,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:29,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:29,913 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:29,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817086228] [2021-05-02 23:17:29,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817086228] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:29,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:29,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2021-05-02 23:17:29,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255534100] [2021-05-02 23:17:29,914 INFO L460 AbstractCegarLoop]: Interpolant automaton has 77 states [2021-05-02 23:17:29,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:29,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-05-02 23:17:29,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:29,914 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:30,249 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-05-02 23:17:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-05-02 23:17:30,249 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2021-05-02 23:17:30,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:30,250 INFO L225 Difference]: With dead ends: 168 [2021-05-02 23:17:30,250 INFO L226 Difference]: Without dead ends: 162 [2021-05-02 23:17:30,250 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 2220.9ms TimeCoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2021-05-02 23:17:30,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-05-02 23:17:30,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-05-02 23:17:30,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-05-02 23:17:30,254 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-05-02 23:17:30,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:30,254 INFO L480 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-05-02 23:17:30,254 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 77 states, 77 states have (on average 2.0) internal successors, (154), 76 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:30,254 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-05-02 23:17:30,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-05-02 23:17:30,255 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:30,255 INFO L523 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:30,255 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2021-05-02 23:17:30,255 INFO L428 AbstractCegarLoop]: === Iteration 76 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:30,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:30,256 INFO L82 PathProgramCache]: Analyzing trace with hash 2014208625, now seen corresponding path program 74 times [2021-05-02 23:17:30,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:30,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081386907] [2021-05-02 23:17:30,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:30,259 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:30,260 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:30,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:32,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:32,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:32,662 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:32,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081386907] [2021-05-02 23:17:32,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081386907] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:32,662 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:32,662 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2021-05-02 23:17:32,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269675857] [2021-05-02 23:17:32,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 78 states [2021-05-02 23:17:32,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:32,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-05-02 23:17:32,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:32,664 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:32,945 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-05-02 23:17:32,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-05-02 23:17:32,945 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2021-05-02 23:17:32,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:32,946 INFO L225 Difference]: With dead ends: 170 [2021-05-02 23:17:32,946 INFO L226 Difference]: Without dead ends: 164 [2021-05-02 23:17:32,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 2331.5ms TimeCoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2021-05-02 23:17:32,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-05-02 23:17:32,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-05-02 23:17:32,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-05-02 23:17:32,949 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-05-02 23:17:32,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:32,950 INFO L480 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-05-02 23:17:32,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 78 states, 78 states have (on average 2.0) internal successors, (156), 77 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:32,950 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-05-02 23:17:32,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-05-02 23:17:32,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:32,951 INFO L523 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:32,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-05-02 23:17:32,951 INFO L428 AbstractCegarLoop]: === Iteration 77 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:32,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:32,951 INFO L82 PathProgramCache]: Analyzing trace with hash 2078483795, now seen corresponding path program 75 times [2021-05-02 23:17:32,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:32,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305452392] [2021-05-02 23:17:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:32,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:32,955 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:35,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:35,415 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:35,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305452392] [2021-05-02 23:17:35,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [305452392] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:35,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:35,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2021-05-02 23:17:35,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418415808] [2021-05-02 23:17:35,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 79 states [2021-05-02 23:17:35,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:35,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-05-02 23:17:35,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:35,416 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:35,645 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-05-02 23:17:35,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-05-02 23:17:35,645 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 162 [2021-05-02 23:17:35,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:35,646 INFO L225 Difference]: With dead ends: 172 [2021-05-02 23:17:35,646 INFO L226 Difference]: Without dead ends: 166 [2021-05-02 23:17:35,646 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 2380.5ms TimeCoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2021-05-02 23:17:35,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-05-02 23:17:35,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-05-02 23:17:35,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-05-02 23:17:35,649 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-05-02 23:17:35,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:35,650 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-05-02 23:17:35,650 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 79 states, 79 states have (on average 2.0) internal successors, (158), 78 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:35,650 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-05-02 23:17:35,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-05-02 23:17:35,651 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:35,651 INFO L523 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:35,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2021-05-02 23:17:35,651 INFO L428 AbstractCegarLoop]: === Iteration 78 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:35,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:35,651 INFO L82 PathProgramCache]: Analyzing trace with hash -577587275, now seen corresponding path program 76 times [2021-05-02 23:17:35,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:35,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [168037619] [2021-05-02 23:17:35,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:35,655 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:35,656 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,158 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:38,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:38,161 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:38,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [168037619] [2021-05-02 23:17:38,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [168037619] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:38,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:38,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2021-05-02 23:17:38,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242572746] [2021-05-02 23:17:38,162 INFO L460 AbstractCegarLoop]: Interpolant automaton has 80 states [2021-05-02 23:17:38,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-05-02 23:17:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:38,163 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:38,395 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-05-02 23:17:38,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-05-02 23:17:38,395 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2021-05-02 23:17:38,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:38,396 INFO L225 Difference]: With dead ends: 174 [2021-05-02 23:17:38,396 INFO L226 Difference]: Without dead ends: 168 [2021-05-02 23:17:38,397 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 2427.5ms TimeCoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2021-05-02 23:17:38,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-05-02 23:17:38,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-05-02 23:17:38,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-05-02 23:17:38,400 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-05-02 23:17:38,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:38,400 INFO L480 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-05-02 23:17:38,400 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 80 states, 80 states have (on average 2.0) internal successors, (160), 79 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:38,400 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-05-02 23:17:38,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-05-02 23:17:38,401 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:38,401 INFO L523 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:38,401 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2021-05-02 23:17:38,401 INFO L428 AbstractCegarLoop]: === Iteration 79 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:38,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:38,402 INFO L82 PathProgramCache]: Analyzing trace with hash -1851311721, now seen corresponding path program 77 times [2021-05-02 23:17:38,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:38,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [709292634] [2021-05-02 23:17:38,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:38,405 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:38,406 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:38,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:40,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:40,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:40,973 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:40,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [709292634] [2021-05-02 23:17:40,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [709292634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:40,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:40,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2021-05-02 23:17:40,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452656780] [2021-05-02 23:17:40,973 INFO L460 AbstractCegarLoop]: Interpolant automaton has 81 states [2021-05-02 23:17:40,973 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:40,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-05-02 23:17:40,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:40,974 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:41,193 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-05-02 23:17:41,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-05-02 23:17:41,193 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2021-05-02 23:17:41,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:41,194 INFO L225 Difference]: With dead ends: 176 [2021-05-02 23:17:41,194 INFO L226 Difference]: Without dead ends: 170 [2021-05-02 23:17:41,194 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 2487.8ms TimeCoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2021-05-02 23:17:41,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-05-02 23:17:41,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-05-02 23:17:41,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-05-02 23:17:41,198 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-05-02 23:17:41,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:41,198 INFO L480 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-05-02 23:17:41,198 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 81 states, 81 states have (on average 2.0) internal successors, (162), 80 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:41,198 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-05-02 23:17:41,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-05-02 23:17:41,199 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:41,199 INFO L523 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:41,199 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2021-05-02 23:17:41,199 INFO L428 AbstractCegarLoop]: === Iteration 80 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:41,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:41,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1834824967, now seen corresponding path program 78 times [2021-05-02 23:17:41,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:41,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012603355] [2021-05-02 23:17:41,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:41,203 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:41,204 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:44,046 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:44,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:44,049 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:44,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012603355] [2021-05-02 23:17:44,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012603355] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:44,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:44,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2021-05-02 23:17:44,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920113902] [2021-05-02 23:17:44,050 INFO L460 AbstractCegarLoop]: Interpolant automaton has 82 states [2021-05-02 23:17:44,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:44,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-05-02 23:17:44,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:44,051 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:44,282 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-05-02 23:17:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-05-02 23:17:44,282 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 168 [2021-05-02 23:17:44,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:44,283 INFO L225 Difference]: With dead ends: 178 [2021-05-02 23:17:44,283 INFO L226 Difference]: Without dead ends: 172 [2021-05-02 23:17:44,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2765.8ms TimeCoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2021-05-02 23:17:44,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-05-02 23:17:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-05-02 23:17:44,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-05-02 23:17:44,287 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-05-02 23:17:44,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:44,287 INFO L480 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-05-02 23:17:44,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 82 states, 82 states have (on average 2.0) internal successors, (164), 81 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:44,288 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-05-02 23:17:44,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-05-02 23:17:44,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:44,288 INFO L523 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:44,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2021-05-02 23:17:44,289 INFO L428 AbstractCegarLoop]: === Iteration 81 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:44,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:44,289 INFO L82 PathProgramCache]: Analyzing trace with hash 1124043739, now seen corresponding path program 79 times [2021-05-02 23:17:44,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:44,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1116859685] [2021-05-02 23:17:44,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:44,293 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:44,294 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:47,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:47,017 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:47,017 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1116859685] [2021-05-02 23:17:47,017 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1116859685] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:47,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:47,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2021-05-02 23:17:47,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242857039] [2021-05-02 23:17:47,018 INFO L460 AbstractCegarLoop]: Interpolant automaton has 83 states [2021-05-02 23:17:47,018 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:47,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-05-02 23:17:47,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:47,018 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:47,276 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-05-02 23:17:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-05-02 23:17:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2021-05-02 23:17:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:47,278 INFO L225 Difference]: With dead ends: 180 [2021-05-02 23:17:47,278 INFO L226 Difference]: Without dead ends: 174 [2021-05-02 23:17:47,278 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2640.4ms TimeCoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2021-05-02 23:17:47,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-05-02 23:17:47,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-05-02 23:17:47,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-05-02 23:17:47,282 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-05-02 23:17:47,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:47,282 INFO L480 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-05-02 23:17:47,282 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 83 states, 83 states have (on average 2.0) internal successors, (166), 82 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:47,282 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-05-02 23:17:47,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-05-02 23:17:47,283 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:47,283 INFO L523 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:47,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2021-05-02 23:17:47,283 INFO L428 AbstractCegarLoop]: === Iteration 82 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:47,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:47,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1328520253, now seen corresponding path program 80 times [2021-05-02 23:17:47,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:47,284 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875025261] [2021-05-02 23:17:47,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:47,299 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:47,300 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:47,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:50,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:50,087 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:50,087 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875025261] [2021-05-02 23:17:50,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875025261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:50,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:50,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2021-05-02 23:17:50,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305184425] [2021-05-02 23:17:50,088 INFO L460 AbstractCegarLoop]: Interpolant automaton has 84 states [2021-05-02 23:17:50,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:50,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-05-02 23:17:50,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:50,089 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:50,425 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-05-02 23:17:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-05-02 23:17:50,426 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2021-05-02 23:17:50,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:50,426 INFO L225 Difference]: With dead ends: 182 [2021-05-02 23:17:50,426 INFO L226 Difference]: Without dead ends: 176 [2021-05-02 23:17:50,427 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2712.3ms TimeCoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2021-05-02 23:17:50,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-05-02 23:17:50,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-05-02 23:17:50,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-05-02 23:17:50,429 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-05-02 23:17:50,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:50,429 INFO L480 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-05-02 23:17:50,430 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 84 states, 84 states have (on average 2.0) internal successors, (168), 83 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:50,430 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-05-02 23:17:50,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-05-02 23:17:50,430 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:50,430 INFO L523 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:50,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2021-05-02 23:17:50,431 INFO L428 AbstractCegarLoop]: === Iteration 83 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:50,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:50,431 INFO L82 PathProgramCache]: Analyzing trace with hash 261954591, now seen corresponding path program 81 times [2021-05-02 23:17:50,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:50,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [359514291] [2021-05-02 23:17:50,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:50,438 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:50,439 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:50,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:53,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:53,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:53,272 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:53,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [359514291] [2021-05-02 23:17:53,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [359514291] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:53,272 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:53,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2021-05-02 23:17:53,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687157637] [2021-05-02 23:17:53,273 INFO L460 AbstractCegarLoop]: Interpolant automaton has 85 states [2021-05-02 23:17:53,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:53,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-05-02 23:17:53,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:53,274 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:53,664 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-05-02 23:17:53,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-05-02 23:17:53,665 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2021-05-02 23:17:53,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:53,666 INFO L225 Difference]: With dead ends: 184 [2021-05-02 23:17:53,666 INFO L226 Difference]: Without dead ends: 178 [2021-05-02 23:17:53,666 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2752.3ms TimeCoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2021-05-02 23:17:53,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-05-02 23:17:53,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-05-02 23:17:53,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-05-02 23:17:53,669 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-05-02 23:17:53,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:53,669 INFO L480 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-05-02 23:17:53,669 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 85 states, 85 states have (on average 2.0) internal successors, (170), 84 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:53,669 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-05-02 23:17:53,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-05-02 23:17:53,670 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:53,670 INFO L523 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:53,670 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2021-05-02 23:17:53,671 INFO L428 AbstractCegarLoop]: === Iteration 84 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:53,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:53,671 INFO L82 PathProgramCache]: Analyzing trace with hash 1789537153, now seen corresponding path program 82 times [2021-05-02 23:17:53,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:53,671 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834868917] [2021-05-02 23:17:53,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:53,675 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:53,676 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:53,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:56,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:56,577 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:56,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834868917] [2021-05-02 23:17:56,577 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [834868917] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:56,577 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:56,577 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2021-05-02 23:17:56,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884291080] [2021-05-02 23:17:56,577 INFO L460 AbstractCegarLoop]: Interpolant automaton has 86 states [2021-05-02 23:17:56,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:56,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-05-02 23:17:56,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:56,578 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:17:56,818 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-05-02 23:17:56,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-05-02 23:17:56,818 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2021-05-02 23:17:56,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:17:56,819 INFO L225 Difference]: With dead ends: 186 [2021-05-02 23:17:56,819 INFO L226 Difference]: Without dead ends: 180 [2021-05-02 23:17:56,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2823.6ms TimeCoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2021-05-02 23:17:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-05-02 23:17:56,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-05-02 23:17:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-05-02 23:17:56,822 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-05-02 23:17:56,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:17:56,822 INFO L480 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-05-02 23:17:56,822 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 86 states, 86 states have (on average 2.0) internal successors, (172), 85 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:17:56,822 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-05-02 23:17:56,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-05-02 23:17:56,823 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:17:56,823 INFO L523 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:17:56,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2021-05-02 23:17:56,823 INFO L428 AbstractCegarLoop]: === Iteration 85 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:17:56,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:17:56,823 INFO L82 PathProgramCache]: Analyzing trace with hash 917564003, now seen corresponding path program 83 times [2021-05-02 23:17:56,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:17:56,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241944757] [2021-05-02 23:17:56,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:17:56,836 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:17:56,837 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:17:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:59,790 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:17:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:17:59,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:17:59,797 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:17:59,797 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241944757] [2021-05-02 23:17:59,797 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241944757] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:17:59,797 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:17:59,797 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2021-05-02 23:17:59,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753683119] [2021-05-02 23:17:59,798 INFO L460 AbstractCegarLoop]: Interpolant automaton has 87 states [2021-05-02 23:17:59,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:17:59,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-05-02 23:17:59,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:17:59,798 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:00,147 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-05-02 23:18:00,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-05-02 23:18:00,147 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2021-05-02 23:18:00,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:00,148 INFO L225 Difference]: With dead ends: 188 [2021-05-02 23:18:00,148 INFO L226 Difference]: Without dead ends: 182 [2021-05-02 23:18:00,148 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2869.6ms TimeCoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2021-05-02 23:18:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-05-02 23:18:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-05-02 23:18:00,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-05-02 23:18:00,152 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-05-02 23:18:00,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:00,152 INFO L480 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-05-02 23:18:00,152 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 87 states, 87 states have (on average 2.0) internal successors, (174), 86 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:00,152 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-05-02 23:18:00,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-05-02 23:18:00,153 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:00,153 INFO L523 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:00,153 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2021-05-02 23:18:00,153 INFO L428 AbstractCegarLoop]: === Iteration 86 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:00,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:00,153 INFO L82 PathProgramCache]: Analyzing trace with hash 469989573, now seen corresponding path program 84 times [2021-05-02 23:18:00,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:00,154 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [157098254] [2021-05-02 23:18:00,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:00,158 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:00,158 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:00,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:03,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:03,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:03,182 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:03,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [157098254] [2021-05-02 23:18:03,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [157098254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:03,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:03,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2021-05-02 23:18:03,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883501734] [2021-05-02 23:18:03,182 INFO L460 AbstractCegarLoop]: Interpolant automaton has 88 states [2021-05-02 23:18:03,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:03,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-05-02 23:18:03,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:03,183 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:03,623 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-05-02 23:18:03,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-05-02 23:18:03,623 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2021-05-02 23:18:03,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:03,624 INFO L225 Difference]: With dead ends: 190 [2021-05-02 23:18:03,624 INFO L226 Difference]: Without dead ends: 184 [2021-05-02 23:18:03,625 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2938.5ms TimeCoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2021-05-02 23:18:03,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-05-02 23:18:03,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-05-02 23:18:03,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-05-02 23:18:03,629 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-05-02 23:18:03,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:03,629 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-05-02 23:18:03,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 88 states, 88 states have (on average 2.0) internal successors, (176), 87 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:03,629 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-05-02 23:18:03,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-05-02 23:18:03,630 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:03,630 INFO L523 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:03,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2021-05-02 23:18:03,630 INFO L428 AbstractCegarLoop]: === Iteration 87 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:03,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:03,631 INFO L82 PathProgramCache]: Analyzing trace with hash -152308057, now seen corresponding path program 85 times [2021-05-02 23:18:03,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:03,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194262982] [2021-05-02 23:18:03,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:03,643 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:03,644 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:03,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:06,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:06,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:06,810 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:06,810 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194262982] [2021-05-02 23:18:06,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194262982] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:06,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:06,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2021-05-02 23:18:06,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586552888] [2021-05-02 23:18:06,811 INFO L460 AbstractCegarLoop]: Interpolant automaton has 89 states [2021-05-02 23:18:06,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:06,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-05-02 23:18:06,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:06,812 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:07,290 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-05-02 23:18:07,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-05-02 23:18:07,291 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2021-05-02 23:18:07,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:07,292 INFO L225 Difference]: With dead ends: 192 [2021-05-02 23:18:07,292 INFO L226 Difference]: Without dead ends: 186 [2021-05-02 23:18:07,292 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3066.0ms TimeCoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2021-05-02 23:18:07,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-05-02 23:18:07,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-05-02 23:18:07,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-05-02 23:18:07,296 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-05-02 23:18:07,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:07,296 INFO L480 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-05-02 23:18:07,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 89 states, 89 states have (on average 2.0) internal successors, (178), 88 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:07,296 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-05-02 23:18:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-05-02 23:18:07,297 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:07,297 INFO L523 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:07,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2021-05-02 23:18:07,297 INFO L428 AbstractCegarLoop]: === Iteration 88 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:07,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:07,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1179876343, now seen corresponding path program 86 times [2021-05-02 23:18:07,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:07,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533519410] [2021-05-02 23:18:07,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:07,302 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:07,303 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:07,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,542 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:10,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:10,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:10,545 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:10,545 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533519410] [2021-05-02 23:18:10,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [533519410] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:10,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:10,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2021-05-02 23:18:10,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530630653] [2021-05-02 23:18:10,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 90 states [2021-05-02 23:18:10,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:10,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-05-02 23:18:10,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:10,547 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:10,817 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-05-02 23:18:10,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-05-02 23:18:10,818 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2021-05-02 23:18:10,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:10,818 INFO L225 Difference]: With dead ends: 194 [2021-05-02 23:18:10,818 INFO L226 Difference]: Without dead ends: 188 [2021-05-02 23:18:10,819 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 3149.6ms TimeCoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2021-05-02 23:18:10,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-05-02 23:18:10,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-05-02 23:18:10,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-05-02 23:18:10,821 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-05-02 23:18:10,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:10,821 INFO L480 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-05-02 23:18:10,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 90 states, 90 states have (on average 2.0) internal successors, (180), 89 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:10,822 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-05-02 23:18:10,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-05-02 23:18:10,822 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:10,822 INFO L523 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:10,822 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2021-05-02 23:18:10,822 INFO L428 AbstractCegarLoop]: === Iteration 89 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:10,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:10,822 INFO L82 PathProgramCache]: Analyzing trace with hash -830521109, now seen corresponding path program 87 times [2021-05-02 23:18:10,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:10,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1186952806] [2021-05-02 23:18:10,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:10,828 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:10,828 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:10,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:14,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:14,071 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:14,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1186952806] [2021-05-02 23:18:14,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1186952806] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:14,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:14,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2021-05-02 23:18:14,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840378009] [2021-05-02 23:18:14,071 INFO L460 AbstractCegarLoop]: Interpolant automaton has 91 states [2021-05-02 23:18:14,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:14,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-05-02 23:18:14,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:14,072 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:14,539 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-05-02 23:18:14,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-05-02 23:18:14,539 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 186 [2021-05-02 23:18:14,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:14,540 INFO L225 Difference]: With dead ends: 196 [2021-05-02 23:18:14,540 INFO L226 Difference]: Without dead ends: 190 [2021-05-02 23:18:14,540 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 3159.5ms TimeCoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2021-05-02 23:18:14,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-05-02 23:18:14,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-05-02 23:18:14,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-05-02 23:18:14,543 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-05-02 23:18:14,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:14,543 INFO L480 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-05-02 23:18:14,543 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 91 states, 91 states have (on average 2.0) internal successors, (182), 90 states have internal predecessors, (182), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:14,543 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-05-02 23:18:14,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-05-02 23:18:14,544 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:14,544 INFO L523 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:14,544 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2021-05-02 23:18:14,544 INFO L428 AbstractCegarLoop]: === Iteration 90 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:14,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:14,545 INFO L82 PathProgramCache]: Analyzing trace with hash -107590323, now seen corresponding path program 88 times [2021-05-02 23:18:14,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:14,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539165066] [2021-05-02 23:18:14,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:14,553 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:14,554 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:14,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:17,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:17,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:17,915 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:17,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539165066] [2021-05-02 23:18:17,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [539165066] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:17,916 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:17,916 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2021-05-02 23:18:17,916 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229011558] [2021-05-02 23:18:17,916 INFO L460 AbstractCegarLoop]: Interpolant automaton has 92 states [2021-05-02 23:18:17,916 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:17,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-05-02 23:18:17,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:17,917 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:18,340 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-05-02 23:18:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-05-02 23:18:18,341 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2021-05-02 23:18:18,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:18,344 INFO L225 Difference]: With dead ends: 198 [2021-05-02 23:18:18,344 INFO L226 Difference]: Without dead ends: 192 [2021-05-02 23:18:18,345 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 3278.5ms TimeCoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2021-05-02 23:18:18,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-05-02 23:18:18,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-05-02 23:18:18,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-05-02 23:18:18,348 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-05-02 23:18:18,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:18,348 INFO L480 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-05-02 23:18:18,348 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 92 states, 92 states have (on average 2.0) internal successors, (184), 91 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:18,348 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-05-02 23:18:18,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-05-02 23:18:18,349 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:18,349 INFO L523 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:18,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2021-05-02 23:18:18,349 INFO L428 AbstractCegarLoop]: === Iteration 91 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1155806929, now seen corresponding path program 89 times [2021-05-02 23:18:18,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:18,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599606986] [2021-05-02 23:18:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:18,359 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:18,360 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:18,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:21,954 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:21,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:21,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:21,957 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:21,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599606986] [2021-05-02 23:18:21,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [599606986] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:21,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:21,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2021-05-02 23:18:21,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737238606] [2021-05-02 23:18:21,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 93 states [2021-05-02 23:18:21,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:21,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-05-02 23:18:21,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:21,958 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:22,289 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-05-02 23:18:22,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-05-02 23:18:22,290 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2021-05-02 23:18:22,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:22,291 INFO L225 Difference]: With dead ends: 200 [2021-05-02 23:18:22,291 INFO L226 Difference]: Without dead ends: 194 [2021-05-02 23:18:22,291 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 3505.1ms TimeCoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2021-05-02 23:18:22,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-05-02 23:18:22,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-05-02 23:18:22,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-05-02 23:18:22,294 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-05-02 23:18:22,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:22,295 INFO L480 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-05-02 23:18:22,295 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 93 states, 93 states have (on average 2.0) internal successors, (186), 92 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:22,295 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-05-02 23:18:22,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-05-02 23:18:22,296 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:22,296 INFO L523 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:22,296 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2021-05-02 23:18:22,296 INFO L428 AbstractCegarLoop]: === Iteration 92 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:22,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:22,296 INFO L82 PathProgramCache]: Analyzing trace with hash 825349265, now seen corresponding path program 90 times [2021-05-02 23:18:22,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:22,296 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664484665] [2021-05-02 23:18:22,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:22,301 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:22,302 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,813 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:25,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:25,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:25,815 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:25,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664484665] [2021-05-02 23:18:25,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [664484665] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:25,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:25,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2021-05-02 23:18:25,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877343845] [2021-05-02 23:18:25,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 94 states [2021-05-02 23:18:25,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:25,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-05-02 23:18:25,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:25,817 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:26,149 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-05-02 23:18:26,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-05-02 23:18:26,150 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 192 [2021-05-02 23:18:26,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:26,151 INFO L225 Difference]: With dead ends: 202 [2021-05-02 23:18:26,151 INFO L226 Difference]: Without dead ends: 196 [2021-05-02 23:18:26,151 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 3423.8ms TimeCoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2021-05-02 23:18:26,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-05-02 23:18:26,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-05-02 23:18:26,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-05-02 23:18:26,154 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-05-02 23:18:26,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:26,154 INFO L480 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-05-02 23:18:26,155 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 94 states, 94 states have (on average 2.0) internal successors, (188), 93 states have internal predecessors, (188), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:26,155 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-05-02 23:18:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-05-02 23:18:26,155 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:26,155 INFO L523 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:26,155 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2021-05-02 23:18:26,155 INFO L428 AbstractCegarLoop]: === Iteration 93 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:26,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:26,156 INFO L82 PathProgramCache]: Analyzing trace with hash 2045939571, now seen corresponding path program 91 times [2021-05-02 23:18:26,156 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:26,156 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570928768] [2021-05-02 23:18:26,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:26,159 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:26,160 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:26,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:29,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:29,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:29,779 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:29,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570928768] [2021-05-02 23:18:29,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [570928768] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:29,780 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:29,780 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2021-05-02 23:18:29,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175860503] [2021-05-02 23:18:29,780 INFO L460 AbstractCegarLoop]: Interpolant automaton has 95 states [2021-05-02 23:18:29,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:29,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-05-02 23:18:29,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:29,781 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:30,087 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-05-02 23:18:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-05-02 23:18:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2021-05-02 23:18:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:30,088 INFO L225 Difference]: With dead ends: 204 [2021-05-02 23:18:30,088 INFO L226 Difference]: Without dead ends: 198 [2021-05-02 23:18:30,089 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 3529.2ms TimeCoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2021-05-02 23:18:30,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-05-02 23:18:30,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-05-02 23:18:30,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-05-02 23:18:30,091 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-05-02 23:18:30,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:30,091 INFO L480 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-05-02 23:18:30,091 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 95 states, 95 states have (on average 2.0) internal successors, (190), 94 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:30,091 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-05-02 23:18:30,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-05-02 23:18:30,092 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:30,092 INFO L523 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:30,092 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2021-05-02 23:18:30,092 INFO L428 AbstractCegarLoop]: === Iteration 94 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:30,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:30,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1787815467, now seen corresponding path program 92 times [2021-05-02 23:18:30,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:30,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972248932] [2021-05-02 23:18:30,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:30,096 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:30,096 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:30,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:33,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:33,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:33,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:33,773 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:33,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972248932] [2021-05-02 23:18:33,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1972248932] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:33,773 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:33,773 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2021-05-02 23:18:33,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641488209] [2021-05-02 23:18:33,773 INFO L460 AbstractCegarLoop]: Interpolant automaton has 96 states [2021-05-02 23:18:33,773 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:33,774 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-05-02 23:18:33,774 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:33,774 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:34,101 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-05-02 23:18:34,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-05-02 23:18:34,102 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 196 [2021-05-02 23:18:34,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:34,103 INFO L225 Difference]: With dead ends: 206 [2021-05-02 23:18:34,103 INFO L226 Difference]: Without dead ends: 200 [2021-05-02 23:18:34,103 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 3596.9ms TimeCoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2021-05-02 23:18:34,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-05-02 23:18:34,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-05-02 23:18:34,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-05-02 23:18:34,106 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-05-02 23:18:34,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:34,106 INFO L480 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-05-02 23:18:34,106 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 96 states, 96 states have (on average 2.0) internal successors, (192), 95 states have internal predecessors, (192), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:34,107 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-05-02 23:18:34,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-05-02 23:18:34,107 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:34,107 INFO L523 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:34,107 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2021-05-02 23:18:34,108 INFO L428 AbstractCegarLoop]: === Iteration 95 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:34,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:34,108 INFO L82 PathProgramCache]: Analyzing trace with hash -944467017, now seen corresponding path program 93 times [2021-05-02 23:18:34,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:34,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [401536825] [2021-05-02 23:18:34,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:34,115 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:34,120 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:37,865 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:37,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:37,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:37,868 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:37,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [401536825] [2021-05-02 23:18:37,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [401536825] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:37,868 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:37,868 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2021-05-02 23:18:37,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294362204] [2021-05-02 23:18:37,868 INFO L460 AbstractCegarLoop]: Interpolant automaton has 97 states [2021-05-02 23:18:37,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:37,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-05-02 23:18:37,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:37,869 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:38,213 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-05-02 23:18:38,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-05-02 23:18:38,213 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2021-05-02 23:18:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:38,214 INFO L225 Difference]: With dead ends: 208 [2021-05-02 23:18:38,214 INFO L226 Difference]: Without dead ends: 202 [2021-05-02 23:18:38,215 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 3649.9ms TimeCoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2021-05-02 23:18:38,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-05-02 23:18:38,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-05-02 23:18:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-05-02 23:18:38,217 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-05-02 23:18:38,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:38,218 INFO L480 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-05-02 23:18:38,222 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 97 states, 97 states have (on average 2.0) internal successors, (194), 96 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:38,222 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-05-02 23:18:38,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-05-02 23:18:38,222 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:38,223 INFO L523 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:38,223 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2021-05-02 23:18:38,223 INFO L428 AbstractCegarLoop]: === Iteration 96 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:38,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:38,223 INFO L82 PathProgramCache]: Analyzing trace with hash 2059541785, now seen corresponding path program 94 times [2021-05-02 23:18:38,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:38,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1674059415] [2021-05-02 23:18:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:38,229 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:38,229 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:38,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,093 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:42,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:42,096 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:42,096 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:42,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1674059415] [2021-05-02 23:18:42,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1674059415] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:42,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:42,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2021-05-02 23:18:42,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682143029] [2021-05-02 23:18:42,096 INFO L460 AbstractCegarLoop]: Interpolant automaton has 98 states [2021-05-02 23:18:42,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:42,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-05-02 23:18:42,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:42,097 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:42,559 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-05-02 23:18:42,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-05-02 23:18:42,560 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2021-05-02 23:18:42,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:42,561 INFO L225 Difference]: With dead ends: 210 [2021-05-02 23:18:42,561 INFO L226 Difference]: Without dead ends: 204 [2021-05-02 23:18:42,562 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 3780.2ms TimeCoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2021-05-02 23:18:42,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-05-02 23:18:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-05-02 23:18:42,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-05-02 23:18:42,565 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-05-02 23:18:42,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:42,565 INFO L480 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-05-02 23:18:42,565 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 98 states, 98 states have (on average 2.0) internal successors, (196), 97 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:42,566 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-05-02 23:18:42,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-05-02 23:18:42,566 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:42,566 INFO L523 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:42,566 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2021-05-02 23:18:42,566 INFO L428 AbstractCegarLoop]: === Iteration 97 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:42,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:42,567 INFO L82 PathProgramCache]: Analyzing trace with hash -1600989701, now seen corresponding path program 95 times [2021-05-02 23:18:42,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:42,567 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834755263] [2021-05-02 23:18:42,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:42,570 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:42,571 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:42,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:46,538 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:46,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:46,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:46,547 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:46,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834755263] [2021-05-02 23:18:46,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [834755263] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:46,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:46,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2021-05-02 23:18:46,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520661028] [2021-05-02 23:18:46,548 INFO L460 AbstractCegarLoop]: Interpolant automaton has 99 states [2021-05-02 23:18:46,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:46,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-05-02 23:18:46,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:46,549 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:47,095 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-05-02 23:18:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-05-02 23:18:47,095 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 202 [2021-05-02 23:18:47,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:47,096 INFO L225 Difference]: With dead ends: 212 [2021-05-02 23:18:47,096 INFO L226 Difference]: Without dead ends: 206 [2021-05-02 23:18:47,097 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 3878.9ms TimeCoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2021-05-02 23:18:47,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-05-02 23:18:47,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-05-02 23:18:47,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-05-02 23:18:47,100 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-05-02 23:18:47,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:47,100 INFO L480 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-05-02 23:18:47,100 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 99 states, 99 states have (on average 2.0) internal successors, (198), 98 states have internal predecessors, (198), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:47,100 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-05-02 23:18:47,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-05-02 23:18:47,101 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:47,101 INFO L523 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:47,101 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2021-05-02 23:18:47,101 INFO L428 AbstractCegarLoop]: === Iteration 98 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:47,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:47,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1793532323, now seen corresponding path program 96 times [2021-05-02 23:18:47,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:47,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1225748206] [2021-05-02 23:18:47,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:47,105 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:47,106 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:51,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:51,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:51,396 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:51,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1225748206] [2021-05-02 23:18:51,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1225748206] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:51,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:51,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2021-05-02 23:18:51,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391237373] [2021-05-02 23:18:51,396 INFO L460 AbstractCegarLoop]: Interpolant automaton has 100 states [2021-05-02 23:18:51,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:51,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-05-02 23:18:51,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:51,397 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:51,896 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-05-02 23:18:51,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-05-02 23:18:51,896 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2021-05-02 23:18:51,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:51,897 INFO L225 Difference]: With dead ends: 214 [2021-05-02 23:18:51,897 INFO L226 Difference]: Without dead ends: 208 [2021-05-02 23:18:51,898 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 4184.7ms TimeCoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2021-05-02 23:18:51,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-05-02 23:18:51,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-05-02 23:18:51,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-05-02 23:18:51,901 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-05-02 23:18:51,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:51,901 INFO L480 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-05-02 23:18:51,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 100 states, 100 states have (on average 2.0) internal successors, (200), 99 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:51,901 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-05-02 23:18:51,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-05-02 23:18:51,902 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:51,902 INFO L523 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:51,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2021-05-02 23:18:51,902 INFO L428 AbstractCegarLoop]: === Iteration 99 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:51,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:51,902 INFO L82 PathProgramCache]: Analyzing trace with hash -2143398337, now seen corresponding path program 97 times [2021-05-02 23:18:51,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:51,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1251867439] [2021-05-02 23:18:51,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:51,909 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:51,910 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:56,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:18:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:18:56,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:18:56,069 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:18:56,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1251867439] [2021-05-02 23:18:56,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1251867439] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:18:56,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:18:56,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2021-05-02 23:18:56,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489767539] [2021-05-02 23:18:56,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 101 states [2021-05-02 23:18:56,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:18:56,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-05-02 23:18:56,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:56,071 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:18:56,510 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-05-02 23:18:56,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-05-02 23:18:56,511 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2021-05-02 23:18:56,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:18:56,512 INFO L225 Difference]: With dead ends: 216 [2021-05-02 23:18:56,512 INFO L226 Difference]: Without dead ends: 210 [2021-05-02 23:18:56,512 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 4069.1ms TimeCoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2021-05-02 23:18:56,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-05-02 23:18:56,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-05-02 23:18:56,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-05-02 23:18:56,515 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-05-02 23:18:56,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:18:56,515 INFO L480 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-05-02 23:18:56,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 101 states, 101 states have (on average 2.0) internal successors, (202), 100 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:18:56,515 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-05-02 23:18:56,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-05-02 23:18:56,516 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:18:56,516 INFO L523 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:18:56,516 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2021-05-02 23:18:56,516 INFO L428 AbstractCegarLoop]: === Iteration 100 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:18:56,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:18:56,516 INFO L82 PathProgramCache]: Analyzing trace with hash 937778593, now seen corresponding path program 98 times [2021-05-02 23:18:56,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:18:56,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658337930] [2021-05-02 23:18:56,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:18:56,523 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:18:56,523 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:18:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:00,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:00,863 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:00,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658337930] [2021-05-02 23:19:00,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [658337930] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:00,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:00,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2021-05-02 23:19:00,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508558255] [2021-05-02 23:19:00,864 INFO L460 AbstractCegarLoop]: Interpolant automaton has 102 states [2021-05-02 23:19:00,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:00,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-05-02 23:19:00,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:00,865 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:01,229 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-05-02 23:19:01,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-05-02 23:19:01,229 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2021-05-02 23:19:01,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:01,230 INFO L225 Difference]: With dead ends: 218 [2021-05-02 23:19:01,230 INFO L226 Difference]: Without dead ends: 212 [2021-05-02 23:19:01,231 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 4252.7ms TimeCoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2021-05-02 23:19:01,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-05-02 23:19:01,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-05-02 23:19:01,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-05-02 23:19:01,235 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-05-02 23:19:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:01,235 INFO L480 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-05-02 23:19:01,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 102 states, 102 states have (on average 2.0) internal successors, (204), 101 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-05-02 23:19:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-05-02 23:19:01,236 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:01,236 INFO L523 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:01,236 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2021-05-02 23:19:01,236 INFO L428 AbstractCegarLoop]: === Iteration 101 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1578625917, now seen corresponding path program 99 times [2021-05-02 23:19:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:01,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1920343912] [2021-05-02 23:19:01,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:01,241 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:01,242 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:01,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:05,670 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:05,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:05,673 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:05,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1920343912] [2021-05-02 23:19:05,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1920343912] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:05,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:05,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-05-02 23:19:05,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081444097] [2021-05-02 23:19:05,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 103 states [2021-05-02 23:19:05,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:05,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-05-02 23:19:05,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:05,675 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:06,210 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-05-02 23:19:06,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-05-02 23:19:06,210 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2021-05-02 23:19:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:06,212 INFO L225 Difference]: With dead ends: 220 [2021-05-02 23:19:06,212 INFO L226 Difference]: Without dead ends: 214 [2021-05-02 23:19:06,212 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 4340.3ms TimeCoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2021-05-02 23:19:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-05-02 23:19:06,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-05-02 23:19:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-05-02 23:19:06,216 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-05-02 23:19:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:06,216 INFO L480 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-05-02 23:19:06,216 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 103 states, 103 states have (on average 2.0) internal successors, (206), 102 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-05-02 23:19:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-05-02 23:19:06,217 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:06,217 INFO L523 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:06,218 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2021-05-02 23:19:06,218 INFO L428 AbstractCegarLoop]: === Iteration 102 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:06,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:06,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1776772379, now seen corresponding path program 100 times [2021-05-02 23:19:06,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:06,218 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906240729] [2021-05-02 23:19:06,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:06,224 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:06,224 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:06,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:11,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:11,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:11,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:11,046 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:11,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906240729] [2021-05-02 23:19:11,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [906240729] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:11,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:11,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2021-05-02 23:19:11,046 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697628806] [2021-05-02 23:19:11,046 INFO L460 AbstractCegarLoop]: Interpolant automaton has 104 states [2021-05-02 23:19:11,046 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:11,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-05-02 23:19:11,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:11,048 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:11,586 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-05-02 23:19:11,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-05-02 23:19:11,587 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2021-05-02 23:19:11,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:11,587 INFO L225 Difference]: With dead ends: 222 [2021-05-02 23:19:11,587 INFO L226 Difference]: Without dead ends: 216 [2021-05-02 23:19:11,588 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 4710.7ms TimeCoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2021-05-02 23:19:11,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-05-02 23:19:11,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-05-02 23:19:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-05-02 23:19:11,592 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-05-02 23:19:11,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:11,592 INFO L480 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-05-02 23:19:11,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 104 states, 104 states have (on average 2.0) internal successors, (208), 103 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-05-02 23:19:11,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-05-02 23:19:11,593 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:11,593 INFO L523 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:11,593 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2021-05-02 23:19:11,593 INFO L428 AbstractCegarLoop]: === Iteration 103 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:11,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:11,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1078005959, now seen corresponding path program 101 times [2021-05-02 23:19:11,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:11,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765930402] [2021-05-02 23:19:11,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:11,597 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:11,597 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:16,068 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:16,071 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:16,071 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:16,071 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765930402] [2021-05-02 23:19:16,071 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765930402] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:16,071 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:16,071 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2021-05-02 23:19:16,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521422062] [2021-05-02 23:19:16,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 105 states [2021-05-02 23:19:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-05-02 23:19:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:16,073 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:16,696 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-05-02 23:19:16,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-05-02 23:19:16,697 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2021-05-02 23:19:16,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:16,697 INFO L225 Difference]: With dead ends: 224 [2021-05-02 23:19:16,697 INFO L226 Difference]: Without dead ends: 218 [2021-05-02 23:19:16,698 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 4377.2ms TimeCoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2021-05-02 23:19:16,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-02 23:19:16,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-05-02 23:19:16,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-05-02 23:19:16,701 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-05-02 23:19:16,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:16,701 INFO L480 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-05-02 23:19:16,702 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 105 states, 105 states have (on average 2.0) internal successors, (210), 104 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-05-02 23:19:16,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-05-02 23:19:16,702 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:16,702 INFO L523 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:16,703 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-05-02 23:19:16,703 INFO L428 AbstractCegarLoop]: === Iteration 104 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:16,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:16,703 INFO L82 PathProgramCache]: Analyzing trace with hash 35886633, now seen corresponding path program 102 times [2021-05-02 23:19:16,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:16,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125668359] [2021-05-02 23:19:16,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:16,706 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:16,707 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,343 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:21,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:21,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:21,346 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:21,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125668359] [2021-05-02 23:19:21,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125668359] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:21,346 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:21,346 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2021-05-02 23:19:21,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936612394] [2021-05-02 23:19:21,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 106 states [2021-05-02 23:19:21,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:21,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-05-02 23:19:21,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:21,348 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:21,876 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-05-02 23:19:21,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-02 23:19:21,876 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2021-05-02 23:19:21,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:21,877 INFO L225 Difference]: With dead ends: 226 [2021-05-02 23:19:21,877 INFO L226 Difference]: Without dead ends: 220 [2021-05-02 23:19:21,878 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 4546.8ms TimeCoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2021-05-02 23:19:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-05-02 23:19:21,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-05-02 23:19:21,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-05-02 23:19:21,881 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-05-02 23:19:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:21,881 INFO L480 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-05-02 23:19:21,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 106 states, 106 states have (on average 2.0) internal successors, (212), 105 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-05-02 23:19:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-05-02 23:19:21,882 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:21,882 INFO L523 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:21,882 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2021-05-02 23:19:21,882 INFO L428 AbstractCegarLoop]: === Iteration 105 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:21,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:21,882 INFO L82 PathProgramCache]: Analyzing trace with hash -713405685, now seen corresponding path program 103 times [2021-05-02 23:19:21,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:21,883 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801578311] [2021-05-02 23:19:21,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:21,886 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:21,887 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:21,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:26,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:26,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:26,875 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:26,875 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801578311] [2021-05-02 23:19:26,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [801578311] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:26,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:26,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2021-05-02 23:19:26,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83189733] [2021-05-02 23:19:26,875 INFO L460 AbstractCegarLoop]: Interpolant automaton has 107 states [2021-05-02 23:19:26,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:26,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-05-02 23:19:26,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:26,877 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:27,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:27,281 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-05-02 23:19:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-05-02 23:19:27,282 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2021-05-02 23:19:27,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:27,282 INFO L225 Difference]: With dead ends: 228 [2021-05-02 23:19:27,282 INFO L226 Difference]: Without dead ends: 222 [2021-05-02 23:19:27,283 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 4883.2ms TimeCoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2021-05-02 23:19:27,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-05-02 23:19:27,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-05-02 23:19:27,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:27,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-05-02 23:19:27,287 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-05-02 23:19:27,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:27,287 INFO L480 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-05-02 23:19:27,287 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 107 states, 107 states have (on average 2.0) internal successors, (214), 106 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:27,287 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-05-02 23:19:27,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-05-02 23:19:27,288 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:27,288 INFO L523 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:27,288 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2021-05-02 23:19:27,288 INFO L428 AbstractCegarLoop]: === Iteration 106 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:27,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:27,288 INFO L82 PathProgramCache]: Analyzing trace with hash 771182445, now seen corresponding path program 104 times [2021-05-02 23:19:27,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:27,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454009179] [2021-05-02 23:19:27,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:27,312 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:27,313 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:27,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,155 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:32,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:32,158 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:32,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454009179] [2021-05-02 23:19:32,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [454009179] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:32,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:32,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2021-05-02 23:19:32,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044127108] [2021-05-02 23:19:32,159 INFO L460 AbstractCegarLoop]: Interpolant automaton has 108 states [2021-05-02 23:19:32,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:32,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-05-02 23:19:32,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:32,161 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:32,541 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-05-02 23:19:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-05-02 23:19:32,542 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 220 [2021-05-02 23:19:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:32,543 INFO L225 Difference]: With dead ends: 230 [2021-05-02 23:19:32,543 INFO L226 Difference]: Without dead ends: 224 [2021-05-02 23:19:32,543 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 4738.6ms TimeCoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2021-05-02 23:19:32,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-05-02 23:19:32,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-05-02 23:19:32,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-05-02 23:19:32,547 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-05-02 23:19:32,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:32,547 INFO L480 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-05-02 23:19:32,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 108 states, 108 states have (on average 2.0) internal successors, (216), 107 states have internal predecessors, (216), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:32,548 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-05-02 23:19:32,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-05-02 23:19:32,548 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:32,549 INFO L523 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:32,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2021-05-02 23:19:32,549 INFO L428 AbstractCegarLoop]: === Iteration 107 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:32,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:32,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1531233103, now seen corresponding path program 105 times [2021-05-02 23:19:32,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:32,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2108348254] [2021-05-02 23:19:32,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:32,555 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:32,556 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:32,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:37,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:37,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:37,578 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:37,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2108348254] [2021-05-02 23:19:37,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2108348254] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:37,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:37,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2021-05-02 23:19:37,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676545170] [2021-05-02 23:19:37,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 109 states [2021-05-02 23:19:37,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:37,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-05-02 23:19:37,580 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:37,580 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:37,944 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-05-02 23:19:37,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-05-02 23:19:37,944 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2021-05-02 23:19:37,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:37,945 INFO L225 Difference]: With dead ends: 232 [2021-05-02 23:19:37,945 INFO L226 Difference]: Without dead ends: 226 [2021-05-02 23:19:37,946 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 4908.1ms TimeCoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2021-05-02 23:19:37,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-05-02 23:19:37,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-05-02 23:19:37,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-05-02 23:19:37,950 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-05-02 23:19:37,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:37,950 INFO L480 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-05-02 23:19:37,950 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 109 states, 109 states have (on average 2.0) internal successors, (218), 108 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:37,950 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-05-02 23:19:37,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-05-02 23:19:37,951 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:37,951 INFO L523 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:37,951 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2021-05-02 23:19:37,951 INFO L428 AbstractCegarLoop]: === Iteration 108 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:37,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:37,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1795475121, now seen corresponding path program 106 times [2021-05-02 23:19:37,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:37,952 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [641028975] [2021-05-02 23:19:37,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:37,957 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:37,957 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:42,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:42,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:42,979 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:42,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [641028975] [2021-05-02 23:19:42,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [641028975] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:42,979 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:42,979 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2021-05-02 23:19:42,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959243945] [2021-05-02 23:19:42,979 INFO L460 AbstractCegarLoop]: Interpolant automaton has 110 states [2021-05-02 23:19:42,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:42,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-05-02 23:19:42,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:42,981 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:43,350 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-05-02 23:19:43,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-05-02 23:19:43,351 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2021-05-02 23:19:43,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:43,351 INFO L225 Difference]: With dead ends: 234 [2021-05-02 23:19:43,351 INFO L226 Difference]: Without dead ends: 228 [2021-05-02 23:19:43,352 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 4919.8ms TimeCoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2021-05-02 23:19:43,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-05-02 23:19:43,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-05-02 23:19:43,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-05-02 23:19:43,354 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-05-02 23:19:43,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:43,355 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-05-02 23:19:43,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 110 states, 110 states have (on average 2.0) internal successors, (220), 109 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:43,355 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-05-02 23:19:43,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-05-02 23:19:43,355 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:43,355 INFO L523 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:43,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2021-05-02 23:19:43,355 INFO L428 AbstractCegarLoop]: === Iteration 109 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:43,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:43,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1965983341, now seen corresponding path program 107 times [2021-05-02 23:19:43,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:43,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746078978] [2021-05-02 23:19:43,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:43,359 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:43,360 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:43,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:48,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:48,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:48,705 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746078978] [2021-05-02 23:19:48,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [746078978] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:48,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:48,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2021-05-02 23:19:48,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257459044] [2021-05-02 23:19:48,705 INFO L460 AbstractCegarLoop]: Interpolant automaton has 111 states [2021-05-02 23:19:48,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:48,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-05-02 23:19:48,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:48,707 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:49,122 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-05-02 23:19:49,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-05-02 23:19:49,122 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 226 [2021-05-02 23:19:49,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:49,123 INFO L225 Difference]: With dead ends: 236 [2021-05-02 23:19:49,123 INFO L226 Difference]: Without dead ends: 230 [2021-05-02 23:19:49,124 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 5243.8ms TimeCoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2021-05-02 23:19:49,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-05-02 23:19:49,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-05-02 23:19:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-05-02 23:19:49,127 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-05-02 23:19:49,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:49,127 INFO L480 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-05-02 23:19:49,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 111 states, 111 states have (on average 2.0) internal successors, (222), 110 states have internal predecessors, (222), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:49,127 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-05-02 23:19:49,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-05-02 23:19:49,128 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:49,128 INFO L523 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:49,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2021-05-02 23:19:49,128 INFO L428 AbstractCegarLoop]: === Iteration 110 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:49,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:49,128 INFO L82 PathProgramCache]: Analyzing trace with hash -365102091, now seen corresponding path program 108 times [2021-05-02 23:19:49,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:49,129 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673066900] [2021-05-02 23:19:49,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:49,144 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:49,144 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:49,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,439 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:19:55,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:19:55,442 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:19:55,442 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:19:55,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673066900] [2021-05-02 23:19:55,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673066900] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:19:55,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:19:55,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2021-05-02 23:19:55,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516581327] [2021-05-02 23:19:55,442 INFO L460 AbstractCegarLoop]: Interpolant automaton has 112 states [2021-05-02 23:19:55,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:19:55,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-05-02 23:19:55,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:19:55,444 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:56,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:19:56,028 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-05-02 23:19:56,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-02 23:19:56,030 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 228 [2021-05-02 23:19:56,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:19:56,031 INFO L225 Difference]: With dead ends: 238 [2021-05-02 23:19:56,031 INFO L226 Difference]: Without dead ends: 232 [2021-05-02 23:19:56,031 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 6178.8ms TimeCoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2021-05-02 23:19:56,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-05-02 23:19:56,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-05-02 23:19:56,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:56,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-05-02 23:19:56,034 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-05-02 23:19:56,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:19:56,034 INFO L480 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-05-02 23:19:56,035 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 112 states, 112 states have (on average 2.0) internal successors, (224), 111 states have internal predecessors, (224), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:19:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-05-02 23:19:56,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-05-02 23:19:56,035 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:19:56,035 INFO L523 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:19:56,035 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2021-05-02 23:19:56,035 INFO L428 AbstractCegarLoop]: === Iteration 111 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:19:56,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:19:56,036 INFO L82 PathProgramCache]: Analyzing trace with hash 483487191, now seen corresponding path program 109 times [2021-05-02 23:19:56,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:19:56,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038421515] [2021-05-02 23:19:56,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:19:56,041 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:19:56,041 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:19:56,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:02,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:02,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:02,246 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:02,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038421515] [2021-05-02 23:20:02,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038421515] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:02,246 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:02,246 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2021-05-02 23:20:02,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516623819] [2021-05-02 23:20:02,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 113 states [2021-05-02 23:20:02,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:02,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-05-02 23:20:02,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:02,248 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:03,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:03,068 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-05-02 23:20:03,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-05-02 23:20:03,069 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2021-05-02 23:20:03,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:03,069 INFO L225 Difference]: With dead ends: 240 [2021-05-02 23:20:03,069 INFO L226 Difference]: Without dead ends: 234 [2021-05-02 23:20:03,070 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 6069.9ms TimeCoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2021-05-02 23:20:03,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-05-02 23:20:03,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-05-02 23:20:03,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:03,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-05-02 23:20:03,075 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-05-02 23:20:03,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:03,075 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-05-02 23:20:03,075 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 113 states, 113 states have (on average 2.0) internal successors, (226), 112 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:03,075 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-05-02 23:20:03,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-05-02 23:20:03,076 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:03,076 INFO L523 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:03,076 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2021-05-02 23:20:03,076 INFO L428 AbstractCegarLoop]: === Iteration 112 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:03,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:03,077 INFO L82 PathProgramCache]: Analyzing trace with hash -65999047, now seen corresponding path program 110 times [2021-05-02 23:20:03,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:03,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342456628] [2021-05-02 23:20:03,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:03,081 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:03,082 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:03,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:08,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:08,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:08,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:08,839 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:08,839 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342456628] [2021-05-02 23:20:08,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1342456628] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:08,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:08,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2021-05-02 23:20:08,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121522952] [2021-05-02 23:20:08,840 INFO L460 AbstractCegarLoop]: Interpolant automaton has 114 states [2021-05-02 23:20:08,840 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:08,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-05-02 23:20:08,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:08,842 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:09,660 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-05-02 23:20:09,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-05-02 23:20:09,660 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 232 [2021-05-02 23:20:09,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:09,661 INFO L225 Difference]: With dead ends: 242 [2021-05-02 23:20:09,661 INFO L226 Difference]: Without dead ends: 236 [2021-05-02 23:20:09,662 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 5628.3ms TimeCoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2021-05-02 23:20:09,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-05-02 23:20:09,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-05-02 23:20:09,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-05-02 23:20:09,665 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-05-02 23:20:09,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:09,666 INFO L480 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-05-02 23:20:09,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 114 states, 114 states have (on average 2.0) internal successors, (228), 113 states have internal predecessors, (228), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:09,666 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-05-02 23:20:09,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-05-02 23:20:09,666 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:09,666 INFO L523 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:09,667 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2021-05-02 23:20:09,667 INFO L428 AbstractCegarLoop]: === Iteration 113 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:09,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:09,667 INFO L82 PathProgramCache]: Analyzing trace with hash 158703643, now seen corresponding path program 111 times [2021-05-02 23:20:09,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:09,667 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778121944] [2021-05-02 23:20:09,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:09,671 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:09,671 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:09,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:15,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:15,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:15,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:15,472 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:15,472 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778121944] [2021-05-02 23:20:15,472 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [778121944] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:15,472 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:15,472 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2021-05-02 23:20:15,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280140861] [2021-05-02 23:20:15,473 INFO L460 AbstractCegarLoop]: Interpolant automaton has 115 states [2021-05-02 23:20:15,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:15,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-05-02 23:20:15,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:15,474 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:16,255 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-05-02 23:20:16,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-05-02 23:20:16,256 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2021-05-02 23:20:16,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:16,257 INFO L225 Difference]: With dead ends: 244 [2021-05-02 23:20:16,257 INFO L226 Difference]: Without dead ends: 238 [2021-05-02 23:20:16,257 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 5684.1ms TimeCoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2021-05-02 23:20:16,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-05-02 23:20:16,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-05-02 23:20:16,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-05-02 23:20:16,260 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-05-02 23:20:16,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:16,260 INFO L480 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-05-02 23:20:16,261 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 115 states, 115 states have (on average 2.0) internal successors, (230), 114 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:16,261 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-05-02 23:20:16,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-05-02 23:20:16,261 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:16,261 INFO L523 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:16,261 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2021-05-02 23:20:16,261 INFO L428 AbstractCegarLoop]: === Iteration 114 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:16,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:16,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1349623933, now seen corresponding path program 112 times [2021-05-02 23:20:16,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:16,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477977634] [2021-05-02 23:20:16,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:16,272 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:16,273 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:16,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:22,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:22,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:22,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:22,579 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:22,579 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477977634] [2021-05-02 23:20:22,579 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477977634] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:22,579 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:22,579 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2021-05-02 23:20:22,579 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113629443] [2021-05-02 23:20:22,579 INFO L460 AbstractCegarLoop]: Interpolant automaton has 116 states [2021-05-02 23:20:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-05-02 23:20:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:22,581 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:23,401 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-05-02 23:20:23,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-05-02 23:20:23,402 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2021-05-02 23:20:23,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:23,403 INFO L225 Difference]: With dead ends: 246 [2021-05-02 23:20:23,403 INFO L226 Difference]: Without dead ends: 240 [2021-05-02 23:20:23,404 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 6181.2ms TimeCoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2021-05-02 23:20:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-05-02 23:20:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-05-02 23:20:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-05-02 23:20:23,415 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-05-02 23:20:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:23,416 INFO L480 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-05-02 23:20:23,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 116 states, 116 states have (on average 2.0) internal successors, (232), 115 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-05-02 23:20:23,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-05-02 23:20:23,417 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:23,417 INFO L523 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:23,417 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2021-05-02 23:20:23,417 INFO L428 AbstractCegarLoop]: === Iteration 115 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:23,417 INFO L82 PathProgramCache]: Analyzing trace with hash -932245409, now seen corresponding path program 113 times [2021-05-02 23:20:23,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:23,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346433922] [2021-05-02 23:20:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:23,421 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:23,421 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:30,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:30,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:30,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:30,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346433922] [2021-05-02 23:20:30,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1346433922] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:30,653 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:30,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2021-05-02 23:20:30,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815065227] [2021-05-02 23:20:30,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 117 states [2021-05-02 23:20:30,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:30,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-05-02 23:20:30,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:30,655 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:31,112 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-05-02 23:20:31,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-05-02 23:20:31,113 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 238 [2021-05-02 23:20:31,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:31,114 INFO L225 Difference]: With dead ends: 248 [2021-05-02 23:20:31,114 INFO L226 Difference]: Without dead ends: 242 [2021-05-02 23:20:31,114 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 7108.4ms TimeCoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2021-05-02 23:20:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-05-02 23:20:31,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-05-02 23:20:31,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-05-02 23:20:31,117 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-05-02 23:20:31,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:31,118 INFO L480 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-05-02 23:20:31,118 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 117 states, 117 states have (on average 2.0) internal successors, (234), 116 states have internal predecessors, (234), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-05-02 23:20:31,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-05-02 23:20:31,118 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:31,118 INFO L523 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:31,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2021-05-02 23:20:31,119 INFO L428 AbstractCegarLoop]: === Iteration 116 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:31,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:31,119 INFO L82 PathProgramCache]: Analyzing trace with hash 919605185, now seen corresponding path program 114 times [2021-05-02 23:20:31,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:31,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1164323871] [2021-05-02 23:20:31,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:31,122 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:31,123 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:31,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:37,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:37,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:37,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:37,753 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:37,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1164323871] [2021-05-02 23:20:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1164323871] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:37,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:37,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2021-05-02 23:20:37,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618554882] [2021-05-02 23:20:37,754 INFO L460 AbstractCegarLoop]: Interpolant automaton has 118 states [2021-05-02 23:20:37,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:37,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-05-02 23:20:37,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:37,755 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:38,451 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-05-02 23:20:38,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-05-02 23:20:38,451 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 240 [2021-05-02 23:20:38,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:38,452 INFO L225 Difference]: With dead ends: 250 [2021-05-02 23:20:38,452 INFO L226 Difference]: Without dead ends: 244 [2021-05-02 23:20:38,453 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 6507.1ms TimeCoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2021-05-02 23:20:38,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-05-02 23:20:38,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-05-02 23:20:38,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-05-02 23:20:38,456 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-05-02 23:20:38,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:38,457 INFO L480 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-05-02 23:20:38,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 118 states, 118 states have (on average 2.0) internal successors, (236), 117 states have internal predecessors, (236), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:38,457 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-05-02 23:20:38,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-05-02 23:20:38,458 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:38,458 INFO L523 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:38,458 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2021-05-02 23:20:38,458 INFO L428 AbstractCegarLoop]: === Iteration 117 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:38,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:38,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1863401821, now seen corresponding path program 115 times [2021-05-02 23:20:38,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:38,458 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962984194] [2021-05-02 23:20:38,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:38,463 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:38,464 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:38,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:45,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:45,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:45,423 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:45,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962984194] [2021-05-02 23:20:45,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1962984194] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:45,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:45,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2021-05-02 23:20:45,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537017777] [2021-05-02 23:20:45,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 119 states [2021-05-02 23:20:45,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:45,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-05-02 23:20:45,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:20:45,425 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:46,252 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-05-02 23:20:46,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-02 23:20:46,254 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2021-05-02 23:20:46,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:46,255 INFO L225 Difference]: With dead ends: 252 [2021-05-02 23:20:46,255 INFO L226 Difference]: Without dead ends: 246 [2021-05-02 23:20:46,255 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 6832.9ms TimeCoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2021-05-02 23:20:46,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-05-02 23:20:46,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-05-02 23:20:46,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-05-02 23:20:46,259 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-05-02 23:20:46,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:46,259 INFO L480 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-05-02 23:20:46,259 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 119 states, 119 states have (on average 2.0) internal successors, (238), 118 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:46,259 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-05-02 23:20:46,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-05-02 23:20:46,260 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:46,260 INFO L523 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:46,260 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2021-05-02 23:20:46,260 INFO L428 AbstractCegarLoop]: === Iteration 118 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:46,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:46,260 INFO L82 PathProgramCache]: Analyzing trace with hash -568509179, now seen corresponding path program 116 times [2021-05-02 23:20:46,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:46,260 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232886004] [2021-05-02 23:20:46,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:46,265 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:46,265 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:46,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:53,945 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:20:53,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:20:53,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:20:53,949 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:20:53,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232886004] [2021-05-02 23:20:53,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [232886004] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:20:53,950 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:20:53,950 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2021-05-02 23:20:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052456742] [2021-05-02 23:20:53,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 120 states [2021-05-02 23:20:53,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:20:53,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-05-02 23:20:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:20:53,952 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:54,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:20:54,697 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-05-02 23:20:54,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-05-02 23:20:54,698 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2021-05-02 23:20:54,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:20:54,699 INFO L225 Difference]: With dead ends: 254 [2021-05-02 23:20:54,699 INFO L226 Difference]: Without dead ends: 248 [2021-05-02 23:20:54,700 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 7542.1ms TimeCoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2021-05-02 23:20:54,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-05-02 23:20:54,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-05-02 23:20:54,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:54,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-05-02 23:20:54,703 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-05-02 23:20:54,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:20:54,703 INFO L480 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-05-02 23:20:54,703 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 120 states, 120 states have (on average 2.0) internal successors, (240), 119 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:20:54,704 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-05-02 23:20:54,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-05-02 23:20:54,704 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:20:54,704 INFO L523 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:20:54,704 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2021-05-02 23:20:54,704 INFO L428 AbstractCegarLoop]: === Iteration 119 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:20:54,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:20:54,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1717196057, now seen corresponding path program 117 times [2021-05-02 23:20:54,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:20:54,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1766208124] [2021-05-02 23:20:54,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:20:54,714 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:20:54,715 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:20:54,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:03,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:03,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:03,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:03,074 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:03,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1766208124] [2021-05-02 23:21:03,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1766208124] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:03,075 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:03,075 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2021-05-02 23:21:03,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414961086] [2021-05-02 23:21:03,075 INFO L460 AbstractCegarLoop]: Interpolant automaton has 121 states [2021-05-02 23:21:03,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:03,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-05-02 23:21:03,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:21:03,077 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:03,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:03,943 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-05-02 23:21:03,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-05-02 23:21:03,943 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 246 [2021-05-02 23:21:03,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:03,944 INFO L225 Difference]: With dead ends: 256 [2021-05-02 23:21:03,944 INFO L226 Difference]: Without dead ends: 250 [2021-05-02 23:21:03,945 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 8197.2ms TimeCoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2021-05-02 23:21:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-05-02 23:21:03,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-05-02 23:21:03,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:03,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-05-02 23:21:03,948 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-05-02 23:21:03,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:03,949 INFO L480 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-05-02 23:21:03,949 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 121 states, 121 states have (on average 2.0) internal successors, (242), 120 states have internal predecessors, (242), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:03,949 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-05-02 23:21:03,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-05-02 23:21:03,949 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:03,950 INFO L523 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:03,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2021-05-02 23:21:03,950 INFO L428 AbstractCegarLoop]: === Iteration 120 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:03,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:03,950 INFO L82 PathProgramCache]: Analyzing trace with hash -1798690743, now seen corresponding path program 118 times [2021-05-02 23:21:03,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:03,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951242347] [2021-05-02 23:21:03,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:03,955 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:03,955 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:03,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:11,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:11,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:11,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:11,420 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:11,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951242347] [2021-05-02 23:21:11,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [951242347] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:11,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:11,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2021-05-02 23:21:11,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480344400] [2021-05-02 23:21:11,421 INFO L460 AbstractCegarLoop]: Interpolant automaton has 122 states [2021-05-02 23:21:11,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:11,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-05-02 23:21:11,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:11,422 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:12,455 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-05-02 23:21:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-05-02 23:21:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2021-05-02 23:21:12,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:12,457 INFO L225 Difference]: With dead ends: 258 [2021-05-02 23:21:12,457 INFO L226 Difference]: Without dead ends: 252 [2021-05-02 23:21:12,458 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 7312.1ms TimeCoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2021-05-02 23:21:12,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-05-02 23:21:12,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-05-02 23:21:12,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-05-02 23:21:12,462 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-05-02 23:21:12,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:12,462 INFO L480 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-05-02 23:21:12,462 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 122 states, 122 states have (on average 2.0) internal successors, (244), 121 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:12,462 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-05-02 23:21:12,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-05-02 23:21:12,463 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:12,463 INFO L523 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:12,463 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2021-05-02 23:21:12,463 INFO L428 AbstractCegarLoop]: === Iteration 121 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:12,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:12,463 INFO L82 PathProgramCache]: Analyzing trace with hash 1489294635, now seen corresponding path program 119 times [2021-05-02 23:21:12,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:12,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424911422] [2021-05-02 23:21:12,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:12,467 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:12,468 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:21,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:21,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:21,667 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:21,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424911422] [2021-05-02 23:21:21,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [424911422] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:21,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:21,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2021-05-02 23:21:21,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943766941] [2021-05-02 23:21:21,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 123 states [2021-05-02 23:21:21,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:21,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-05-02 23:21:21,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:21,669 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:22,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:22,493 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-05-02 23:21:22,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-02 23:21:22,494 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2021-05-02 23:21:22,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:22,495 INFO L225 Difference]: With dead ends: 260 [2021-05-02 23:21:22,495 INFO L226 Difference]: Without dead ends: 254 [2021-05-02 23:21:22,496 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 9039.4ms TimeCoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2021-05-02 23:21:22,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-05-02 23:21:22,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-05-02 23:21:22,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:22,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-05-02 23:21:22,508 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-05-02 23:21:22,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:22,508 INFO L480 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-05-02 23:21:22,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 123 states, 123 states have (on average 2.0) internal successors, (246), 122 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:22,508 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-05-02 23:21:22,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-05-02 23:21:22,509 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:22,509 INFO L523 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:22,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2021-05-02 23:21:22,509 INFO L428 AbstractCegarLoop]: === Iteration 122 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:22,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:22,510 INFO L82 PathProgramCache]: Analyzing trace with hash 147313037, now seen corresponding path program 120 times [2021-05-02 23:21:22,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:22,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283911761] [2021-05-02 23:21:22,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:22,514 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:22,514 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:22,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:31,347 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:31,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:31,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:31,350 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:31,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283911761] [2021-05-02 23:21:31,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1283911761] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:31,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:31,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2021-05-02 23:21:31,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45032179] [2021-05-02 23:21:31,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 124 states [2021-05-02 23:21:31,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:31,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-05-02 23:21:31,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:21:31,352 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:32,360 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-05-02 23:21:32,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-05-02 23:21:32,361 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 252 [2021-05-02 23:21:32,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:32,362 INFO L225 Difference]: With dead ends: 262 [2021-05-02 23:21:32,362 INFO L226 Difference]: Without dead ends: 256 [2021-05-02 23:21:32,363 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 8673.7ms TimeCoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2021-05-02 23:21:32,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-05-02 23:21:32,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-05-02 23:21:32,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-05-02 23:21:32,366 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-05-02 23:21:32,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:32,366 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-05-02 23:21:32,366 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 124 states, 124 states have (on average 2.0) internal successors, (248), 123 states have internal predecessors, (248), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:32,366 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-05-02 23:21:32,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-05-02 23:21:32,367 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:32,367 INFO L523 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:32,367 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2021-05-02 23:21:32,367 INFO L428 AbstractCegarLoop]: === Iteration 123 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:32,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:32,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1006813841, now seen corresponding path program 121 times [2021-05-02 23:21:32,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:32,368 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1983174815] [2021-05-02 23:21:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:32,372 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:32,373 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:32,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:40,429 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:40,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:40,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:40,433 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:40,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1983174815] [2021-05-02 23:21:40,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1983174815] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:40,433 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:40,433 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2021-05-02 23:21:40,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097244498] [2021-05-02 23:21:40,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 125 states [2021-05-02 23:21:40,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:40,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-05-02 23:21:40,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:21:40,435 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:41,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:41,291 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-05-02 23:21:41,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-05-02 23:21:41,291 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2021-05-02 23:21:41,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:41,292 INFO L225 Difference]: With dead ends: 264 [2021-05-02 23:21:41,292 INFO L226 Difference]: Without dead ends: 258 [2021-05-02 23:21:41,294 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 7902.6ms TimeCoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2021-05-02 23:21:41,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-05-02 23:21:41,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-05-02 23:21:41,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:41,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-05-02 23:21:41,299 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-05-02 23:21:41,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:41,299 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-05-02 23:21:41,299 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 125 states, 125 states have (on average 2.0) internal successors, (250), 124 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:41,299 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-05-02 23:21:41,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-05-02 23:21:41,300 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:41,300 INFO L523 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:41,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2021-05-02 23:21:41,301 INFO L428 AbstractCegarLoop]: === Iteration 124 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:41,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:41,301 INFO L82 PathProgramCache]: Analyzing trace with hash -2021181231, now seen corresponding path program 122 times [2021-05-02 23:21:41,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:41,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1737161176] [2021-05-02 23:21:41,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:41,313 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:41,315 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:41,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:53,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:21:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:21:53,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:21:53,280 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:21:53,280 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1737161176] [2021-05-02 23:21:53,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1737161176] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:21:53,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:21:53,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2021-05-02 23:21:53,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358241290] [2021-05-02 23:21:53,281 INFO L460 AbstractCegarLoop]: Interpolant automaton has 126 states [2021-05-02 23:21:53,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:21:53,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-05-02 23:21:53,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:21:53,284 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:54,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:21:54,092 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-05-02 23:21:54,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-05-02 23:21:54,094 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2021-05-02 23:21:54,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:21:54,095 INFO L225 Difference]: With dead ends: 266 [2021-05-02 23:21:54,095 INFO L226 Difference]: Without dead ends: 260 [2021-05-02 23:21:54,096 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 11760.0ms TimeCoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2021-05-02 23:21:54,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-05-02 23:21:54,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-05-02 23:21:54,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:54,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-05-02 23:21:54,101 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-05-02 23:21:54,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:21:54,101 INFO L480 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-05-02 23:21:54,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 126 states, 126 states have (on average 2.0) internal successors, (252), 125 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:21:54,102 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-05-02 23:21:54,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-05-02 23:21:54,103 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:21:54,103 INFO L523 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:21:54,103 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2021-05-02 23:21:54,103 INFO L428 AbstractCegarLoop]: === Iteration 125 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:21:54,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:21:54,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1870666829, now seen corresponding path program 123 times [2021-05-02 23:21:54,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:21:54,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856490523] [2021-05-02 23:21:54,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:21:54,109 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:21:54,110 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:21:54,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:06,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:06,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:06,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:06,930 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:06,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856490523] [2021-05-02 23:22:06,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [856490523] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:06,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:06,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2021-05-02 23:22:06,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476870275] [2021-05-02 23:22:06,931 INFO L460 AbstractCegarLoop]: Interpolant automaton has 127 states [2021-05-02 23:22:06,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:06,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-05-02 23:22:06,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:22:06,933 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:07,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:07,867 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-05-02 23:22:07,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-05-02 23:22:07,882 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 258 [2021-05-02 23:22:07,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:07,883 INFO L225 Difference]: With dead ends: 268 [2021-05-02 23:22:07,883 INFO L226 Difference]: Without dead ends: 262 [2021-05-02 23:22:07,885 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 12605.1ms TimeCoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2021-05-02 23:22:07,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-05-02 23:22:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-05-02 23:22:07,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-05-02 23:22:07,900 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-05-02 23:22:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:07,901 INFO L480 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-05-02 23:22:07,901 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 127 states, 127 states have (on average 2.0) internal successors, (254), 126 states have internal predecessors, (254), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-05-02 23:22:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-05-02 23:22:07,903 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:07,903 INFO L523 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:07,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2021-05-02 23:22:07,903 INFO L428 AbstractCegarLoop]: === Iteration 126 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:07,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:07,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1039752725, now seen corresponding path program 124 times [2021-05-02 23:22:07,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:07,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820140837] [2021-05-02 23:22:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:07,910 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:07,912 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:07,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:24,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:24,717 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:24,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820140837] [2021-05-02 23:22:24,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [820140837] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:24,717 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:24,717 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2021-05-02 23:22:24,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972129834] [2021-05-02 23:22:24,718 INFO L460 AbstractCegarLoop]: Interpolant automaton has 128 states [2021-05-02 23:22:24,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:24,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-05-02 23:22:24,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:22:24,720 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:25,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:25,633 INFO L93 Difference]: Finished difference Result 270 states and 270 transitions. [2021-05-02 23:22:25,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-05-02 23:22:25,634 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2021-05-02 23:22:25,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:25,635 INFO L225 Difference]: With dead ends: 270 [2021-05-02 23:22:25,635 INFO L226 Difference]: Without dead ends: 264 [2021-05-02 23:22:25,636 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 16585.4ms TimeCoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2021-05-02 23:22:25,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-05-02 23:22:25,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-05-02 23:22:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:25,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-05-02 23:22:25,640 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-05-02 23:22:25,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:25,641 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-05-02 23:22:25,641 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 128 states, 128 states have (on average 2.0) internal successors, (256), 127 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:25,641 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-05-02 23:22:25,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-05-02 23:22:25,642 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:25,642 INFO L523 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:25,642 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2021-05-02 23:22:25,642 INFO L428 AbstractCegarLoop]: === Iteration 127 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:25,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:25,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1929234423, now seen corresponding path program 125 times [2021-05-02 23:22:25,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:25,642 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1471213271] [2021-05-02 23:22:25,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:25,648 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:25,650 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:25,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:35,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:35,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:35,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:35,026 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:35,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1471213271] [2021-05-02 23:22:35,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1471213271] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:35,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:35,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2021-05-02 23:22:35,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169109124] [2021-05-02 23:22:35,026 INFO L460 AbstractCegarLoop]: Interpolant automaton has 129 states [2021-05-02 23:22:35,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:35,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-05-02 23:22:35,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:22:35,028 INFO L87 Difference]: Start difference. First operand 263 states and 263 transitions. Second operand has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:35,805 INFO L93 Difference]: Finished difference Result 272 states and 272 transitions. [2021-05-02 23:22:35,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-05-02 23:22:35,806 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2021-05-02 23:22:35,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:35,807 INFO L225 Difference]: With dead ends: 272 [2021-05-02 23:22:35,807 INFO L226 Difference]: Without dead ends: 266 [2021-05-02 23:22:35,808 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 9191.2ms TimeCoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2021-05-02 23:22:35,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-05-02 23:22:35,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2021-05-02 23:22:35,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 265 transitions. [2021-05-02 23:22:35,811 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 265 transitions. Word has length 262 [2021-05-02 23:22:35,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:35,812 INFO L480 AbstractCegarLoop]: Abstraction has 265 states and 265 transitions. [2021-05-02 23:22:35,812 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 129 states, 129 states have (on average 2.0) internal successors, (258), 128 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:35,812 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 265 transitions. [2021-05-02 23:22:35,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2021-05-02 23:22:35,813 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:35,813 INFO L523 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:35,813 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2021-05-02 23:22:35,813 INFO L428 AbstractCegarLoop]: === Iteration 128 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:35,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:35,814 INFO L82 PathProgramCache]: Analyzing trace with hash 2022654297, now seen corresponding path program 126 times [2021-05-02 23:22:35,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:35,814 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [288086105] [2021-05-02 23:22:35,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:35,823 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:35,824 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:35,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:50,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:22:50,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:22:50,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:22:50,050 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:22:50,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [288086105] [2021-05-02 23:22:50,051 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [288086105] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:22:50,051 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:22:50,051 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2021-05-02 23:22:50,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184208471] [2021-05-02 23:22:50,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 130 states [2021-05-02 23:22:50,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:22:50,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-05-02 23:22:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:22:50,054 INFO L87 Difference]: Start difference. First operand 265 states and 265 transitions. Second operand has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:51,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:22:51,106 INFO L93 Difference]: Finished difference Result 274 states and 274 transitions. [2021-05-02 23:22:51,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-05-02 23:22:51,108 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2021-05-02 23:22:51,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:22:51,109 INFO L225 Difference]: With dead ends: 274 [2021-05-02 23:22:51,109 INFO L226 Difference]: Without dead ends: 268 [2021-05-02 23:22:51,111 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 14026.7ms TimeCoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2021-05-02 23:22:51,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2021-05-02 23:22:51,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 267. [2021-05-02 23:22:51,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:51,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 267 transitions. [2021-05-02 23:22:51,116 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 267 transitions. Word has length 264 [2021-05-02 23:22:51,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:22:51,116 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 267 transitions. [2021-05-02 23:22:51,117 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 130 states, 130 states have (on average 2.0) internal successors, (260), 129 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:22:51,117 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 267 transitions. [2021-05-02 23:22:51,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2021-05-02 23:22:51,117 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:22:51,118 INFO L523 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:22:51,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2021-05-02 23:22:51,118 INFO L428 AbstractCegarLoop]: === Iteration 129 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:22:51,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:22:51,118 INFO L82 PathProgramCache]: Analyzing trace with hash 1604839995, now seen corresponding path program 127 times [2021-05-02 23:22:51,118 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:22:51,118 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2116464166] [2021-05-02 23:22:51,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:22:51,124 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:22:51,125 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:22:51,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:05,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:05,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:05,150 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:05,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2116464166] [2021-05-02 23:23:05,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [2116464166] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:05,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:05,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2021-05-02 23:23:05,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801152692] [2021-05-02 23:23:05,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 131 states [2021-05-02 23:23:05,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:05,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-05-02 23:23:05,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:23:05,154 INFO L87 Difference]: Start difference. First operand 267 states and 267 transitions. Second operand has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:06,763 INFO L93 Difference]: Finished difference Result 276 states and 276 transitions. [2021-05-02 23:23:06,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2021-05-02 23:23:06,765 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2021-05-02 23:23:06,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:06,766 INFO L225 Difference]: With dead ends: 276 [2021-05-02 23:23:06,766 INFO L226 Difference]: Without dead ends: 270 [2021-05-02 23:23:06,768 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 13838.1ms TimeCoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2021-05-02 23:23:06,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2021-05-02 23:23:06,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 269. [2021-05-02 23:23:06,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.003787878787879) internal successors, (265), 264 states have internal predecessors, (265), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 269 transitions. [2021-05-02 23:23:06,772 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 269 transitions. Word has length 266 [2021-05-02 23:23:06,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:06,772 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 269 transitions. [2021-05-02 23:23:06,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 131 states, 131 states have (on average 2.0) internal successors, (262), 130 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:06,772 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 269 transitions. [2021-05-02 23:23:06,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2021-05-02 23:23:06,773 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:06,773 INFO L523 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:06,773 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2021-05-02 23:23:06,773 INFO L428 AbstractCegarLoop]: === Iteration 130 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:06,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:06,774 INFO L82 PathProgramCache]: Analyzing trace with hash -482745699, now seen corresponding path program 128 times [2021-05-02 23:23:06,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:06,774 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995214699] [2021-05-02 23:23:06,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:06,779 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:06,782 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:06,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:17,597 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:17,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:17,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:17,603 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:17,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995214699] [2021-05-02 23:23:17,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1995214699] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:17,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:17,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2021-05-02 23:23:17,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179122138] [2021-05-02 23:23:17,603 INFO L460 AbstractCegarLoop]: Interpolant automaton has 132 states [2021-05-02 23:23:17,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:17,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2021-05-02 23:23:17,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:23:17,606 INFO L87 Difference]: Start difference. First operand 269 states and 269 transitions. Second operand has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:18,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:18,619 INFO L93 Difference]: Finished difference Result 278 states and 278 transitions. [2021-05-02 23:23:18,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-05-02 23:23:18,621 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2021-05-02 23:23:18,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:18,622 INFO L225 Difference]: With dead ends: 278 [2021-05-02 23:23:18,622 INFO L226 Difference]: Without dead ends: 272 [2021-05-02 23:23:18,624 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 10640.3ms TimeCoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2021-05-02 23:23:18,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-05-02 23:23:18,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2021-05-02 23:23:18,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0037593984962405) internal successors, (267), 266 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:18,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 271 transitions. [2021-05-02 23:23:18,628 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 271 transitions. Word has length 268 [2021-05-02 23:23:18,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:18,628 INFO L480 AbstractCegarLoop]: Abstraction has 271 states and 271 transitions. [2021-05-02 23:23:18,629 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 132 states, 132 states have (on average 2.0) internal successors, (264), 131 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:18,629 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 271 transitions. [2021-05-02 23:23:18,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2021-05-02 23:23:18,629 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:18,629 INFO L523 BasicCegarLoop]: trace histogram [129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:18,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2021-05-02 23:23:18,630 INFO L428 AbstractCegarLoop]: === Iteration 131 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:18,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:18,630 INFO L82 PathProgramCache]: Analyzing trace with hash -902870401, now seen corresponding path program 129 times [2021-05-02 23:23:18,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:18,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [884773736] [2021-05-02 23:23:18,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:18,642 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:18,643 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:18,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:39,453 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:23:39,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:23:39,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:23:39,459 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:23:39,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [884773736] [2021-05-02 23:23:39,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [884773736] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:23:39,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:23:39,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2021-05-02 23:23:39,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723479053] [2021-05-02 23:23:39,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 133 states [2021-05-02 23:23:39,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:23:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2021-05-02 23:23:39,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:23:39,463 INFO L87 Difference]: Start difference. First operand 271 states and 271 transitions. Second operand has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:41,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:23:41,139 INFO L93 Difference]: Finished difference Result 280 states and 280 transitions. [2021-05-02 23:23:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-02 23:23:41,143 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 270 [2021-05-02 23:23:41,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:23:41,144 INFO L225 Difference]: With dead ends: 280 [2021-05-02 23:23:41,144 INFO L226 Difference]: Without dead ends: 274 [2021-05-02 23:23:41,145 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 20538.6ms TimeCoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2021-05-02 23:23:41,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-05-02 23:23:41,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 273. [2021-05-02 23:23:41,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 268 states have (on average 1.0037313432835822) internal successors, (269), 268 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:41,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 273 transitions. [2021-05-02 23:23:41,151 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 273 transitions. Word has length 270 [2021-05-02 23:23:41,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:23:41,151 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 273 transitions. [2021-05-02 23:23:41,151 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 133 states, 133 states have (on average 2.0) internal successors, (266), 132 states have internal predecessors, (266), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:23:41,151 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 273 transitions. [2021-05-02 23:23:41,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2021-05-02 23:23:41,152 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:23:41,152 INFO L523 BasicCegarLoop]: trace histogram [130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:23:41,152 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2021-05-02 23:23:41,152 INFO L428 AbstractCegarLoop]: === Iteration 132 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:23:41,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:23:41,153 INFO L82 PathProgramCache]: Analyzing trace with hash -915783199, now seen corresponding path program 130 times [2021-05-02 23:23:41,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:23:41,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [25517189] [2021-05-02 23:23:41,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:23:41,160 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:23:41,161 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:23:41,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:06,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:06,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:06,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:06,459 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:06,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [25517189] [2021-05-02 23:24:06,460 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [25517189] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:06,460 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:06,460 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2021-05-02 23:24:06,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292140843] [2021-05-02 23:24:06,460 INFO L460 AbstractCegarLoop]: Interpolant automaton has 134 states [2021-05-02 23:24:06,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:06,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2021-05-02 23:24:06,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:24:06,463 INFO L87 Difference]: Start difference. First operand 273 states and 273 transitions. Second operand has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:09,424 INFO L93 Difference]: Finished difference Result 282 states and 282 transitions. [2021-05-02 23:24:09,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2021-05-02 23:24:09,428 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2021-05-02 23:24:09,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:09,429 INFO L225 Difference]: With dead ends: 282 [2021-05-02 23:24:09,430 INFO L226 Difference]: Without dead ends: 276 [2021-05-02 23:24:09,431 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 24979.3ms TimeCoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2021-05-02 23:24:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2021-05-02 23:24:09,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 275. [2021-05-02 23:24:09,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0037037037037038) internal successors, (271), 270 states have internal predecessors, (271), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:09,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 275 transitions. [2021-05-02 23:24:09,439 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 275 transitions. Word has length 272 [2021-05-02 23:24:09,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:09,440 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 275 transitions. [2021-05-02 23:24:09,440 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 134 states, 134 states have (on average 2.0) internal successors, (268), 133 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:09,440 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 275 transitions. [2021-05-02 23:24:09,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2021-05-02 23:24:09,441 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:09,441 INFO L523 BasicCegarLoop]: trace histogram [131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:09,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2021-05-02 23:24:09,442 INFO L428 AbstractCegarLoop]: === Iteration 133 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:09,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:09,442 INFO L82 PathProgramCache]: Analyzing trace with hash -440080189, now seen corresponding path program 131 times [2021-05-02 23:24:09,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:09,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1422069260] [2021-05-02 23:24:09,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:09,451 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:09,453 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:24,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:24,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:24,275 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:24,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1422069260] [2021-05-02 23:24:24,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1422069260] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:24,276 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:24,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2021-05-02 23:24:24,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776344702] [2021-05-02 23:24:24,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 135 states [2021-05-02 23:24:24,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:24,277 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2021-05-02 23:24:24,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:24:24,279 INFO L87 Difference]: Start difference. First operand 275 states and 275 transitions. Second operand has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:25,520 INFO L93 Difference]: Finished difference Result 284 states and 284 transitions. [2021-05-02 23:24:25,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2021-05-02 23:24:25,522 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2021-05-02 23:24:25,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:25,523 INFO L225 Difference]: With dead ends: 284 [2021-05-02 23:24:25,523 INFO L226 Difference]: Without dead ends: 278 [2021-05-02 23:24:25,524 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 14534.9ms TimeCoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2021-05-02 23:24:25,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-05-02 23:24:25,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2021-05-02 23:24:25,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0036764705882353) internal successors, (273), 272 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 277 transitions. [2021-05-02 23:24:25,528 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 277 transitions. Word has length 274 [2021-05-02 23:24:25,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:25,528 INFO L480 AbstractCegarLoop]: Abstraction has 277 states and 277 transitions. [2021-05-02 23:24:25,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 135 states, 135 states have (on average 2.0) internal successors, (270), 134 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:25,529 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 277 transitions. [2021-05-02 23:24:25,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 277 [2021-05-02 23:24:25,529 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:25,530 INFO L523 BasicCegarLoop]: trace histogram [132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:25,530 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2021-05-02 23:24:25,530 INFO L428 AbstractCegarLoop]: === Iteration 134 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1443979045, now seen corresponding path program 132 times [2021-05-02 23:24:25,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:25,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1218445279] [2021-05-02 23:24:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:25,536 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:25,537 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:25,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:41,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:24:41,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:24:41,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:24:41,653 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:24:41,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1218445279] [2021-05-02 23:24:41,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1218445279] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:24:41,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:24:41,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2021-05-02 23:24:41,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896835732] [2021-05-02 23:24:41,654 INFO L460 AbstractCegarLoop]: Interpolant automaton has 136 states [2021-05-02 23:24:41,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:24:41,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2021-05-02 23:24:41,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:24:41,656 INFO L87 Difference]: Start difference. First operand 277 states and 277 transitions. Second operand has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:43,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:24:43,899 INFO L93 Difference]: Finished difference Result 286 states and 286 transitions. [2021-05-02 23:24:43,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2021-05-02 23:24:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 276 [2021-05-02 23:24:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:24:43,904 INFO L225 Difference]: With dead ends: 286 [2021-05-02 23:24:43,904 INFO L226 Difference]: Without dead ends: 280 [2021-05-02 23:24:43,905 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 15883.5ms TimeCoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2021-05-02 23:24:43,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-05-02 23:24:43,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 279. [2021-05-02 23:24:43,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 279 states, 274 states have (on average 1.0036496350364963) internal successors, (275), 274 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:43,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 279 states to 279 states and 279 transitions. [2021-05-02 23:24:43,910 INFO L78 Accepts]: Start accepts. Automaton has 279 states and 279 transitions. Word has length 276 [2021-05-02 23:24:43,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:24:43,910 INFO L480 AbstractCegarLoop]: Abstraction has 279 states and 279 transitions. [2021-05-02 23:24:43,910 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 136 states, 136 states have (on average 2.0) internal successors, (272), 135 states have internal predecessors, (272), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:24:43,910 INFO L276 IsEmpty]: Start isEmpty. Operand 279 states and 279 transitions. [2021-05-02 23:24:43,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2021-05-02 23:24:43,911 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:24:43,911 INFO L523 BasicCegarLoop]: trace histogram [133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:24:43,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2021-05-02 23:24:43,912 INFO L428 AbstractCegarLoop]: === Iteration 135 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:24:43,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:24:43,912 INFO L82 PathProgramCache]: Analyzing trace with hash -451295993, now seen corresponding path program 133 times [2021-05-02 23:24:43,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:24:43,912 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513384171] [2021-05-02 23:24:43,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:24:43,918 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:24:43,919 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:24:43,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:05,798 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:05,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:05,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:05,805 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:05,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513384171] [2021-05-02 23:25:05,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [513384171] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:05,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:05,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2021-05-02 23:25:05,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172364940] [2021-05-02 23:25:05,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 137 states [2021-05-02 23:25:05,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:05,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2021-05-02 23:25:05,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:25:05,825 INFO L87 Difference]: Start difference. First operand 279 states and 279 transitions. Second operand has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:09,106 INFO L93 Difference]: Finished difference Result 288 states and 288 transitions. [2021-05-02 23:25:09,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2021-05-02 23:25:09,113 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2021-05-02 23:25:09,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:09,114 INFO L225 Difference]: With dead ends: 288 [2021-05-02 23:25:09,114 INFO L226 Difference]: Without dead ends: 282 [2021-05-02 23:25:09,116 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 21581.1ms TimeCoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2021-05-02 23:25:09,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2021-05-02 23:25:09,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 281. [2021-05-02 23:25:09,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0036231884057971) internal successors, (277), 276 states have internal predecessors, (277), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 281 transitions. [2021-05-02 23:25:09,122 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 281 transitions. Word has length 278 [2021-05-02 23:25:09,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:09,122 INFO L480 AbstractCegarLoop]: Abstraction has 281 states and 281 transitions. [2021-05-02 23:25:09,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 137 states, 137 states have (on average 2.0) internal successors, (274), 136 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:09,123 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 281 transitions. [2021-05-02 23:25:09,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2021-05-02 23:25:09,124 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:09,125 INFO L523 BasicCegarLoop]: trace histogram [134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:09,125 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2021-05-02 23:25:09,125 INFO L428 AbstractCegarLoop]: === Iteration 136 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:09,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:09,126 INFO L82 PathProgramCache]: Analyzing trace with hash -744474007, now seen corresponding path program 134 times [2021-05-02 23:25:09,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:09,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706251081] [2021-05-02 23:25:09,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:09,136 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:09,138 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:09,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:31,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:25:31,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:25:31,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:25:31,258 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:25:31,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706251081] [2021-05-02 23:25:31,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1706251081] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:25:31,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:25:31,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2021-05-02 23:25:31,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881615113] [2021-05-02 23:25:31,259 INFO L460 AbstractCegarLoop]: Interpolant automaton has 138 states [2021-05-02 23:25:31,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:25:31,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2021-05-02 23:25:31,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:25:31,262 INFO L87 Difference]: Start difference. First operand 281 states and 281 transitions. Second operand has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:25:34,520 INFO L93 Difference]: Finished difference Result 290 states and 290 transitions. [2021-05-02 23:25:34,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2021-05-02 23:25:34,526 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2021-05-02 23:25:34,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:25:34,528 INFO L225 Difference]: With dead ends: 290 [2021-05-02 23:25:34,528 INFO L226 Difference]: Without dead ends: 284 [2021-05-02 23:25:34,529 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 21780.4ms TimeCoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2021-05-02 23:25:34,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-05-02 23:25:34,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2021-05-02 23:25:34,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0035971223021583) internal successors, (279), 278 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 283 transitions. [2021-05-02 23:25:34,535 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 283 transitions. Word has length 280 [2021-05-02 23:25:34,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:25:34,535 INFO L480 AbstractCegarLoop]: Abstraction has 283 states and 283 transitions. [2021-05-02 23:25:34,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 138 states, 138 states have (on average 2.0) internal successors, (276), 137 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:25:34,536 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 283 transitions. [2021-05-02 23:25:34,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 283 [2021-05-02 23:25:34,537 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:25:34,537 INFO L523 BasicCegarLoop]: trace histogram [135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:25:34,537 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2021-05-02 23:25:34,537 INFO L428 AbstractCegarLoop]: === Iteration 137 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:25:34,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:25:34,538 INFO L82 PathProgramCache]: Analyzing trace with hash 979296075, now seen corresponding path program 135 times [2021-05-02 23:25:34,538 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:25:34,538 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748006261] [2021-05-02 23:25:34,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:25:34,546 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:25:34,547 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:25:34,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:02,780 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:02,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:02,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:02,787 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:02,787 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748006261] [2021-05-02 23:26:02,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748006261] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:02,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:02,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2021-05-02 23:26:02,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994252992] [2021-05-02 23:26:02,788 INFO L460 AbstractCegarLoop]: Interpolant automaton has 139 states [2021-05-02 23:26:02,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:02,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2021-05-02 23:26:02,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:26:02,790 INFO L87 Difference]: Start difference. First operand 283 states and 283 transitions. Second operand has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:04,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:04,282 INFO L93 Difference]: Finished difference Result 292 states and 292 transitions. [2021-05-02 23:26:04,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2021-05-02 23:26:04,283 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 282 [2021-05-02 23:26:04,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:04,285 INFO L225 Difference]: With dead ends: 292 [2021-05-02 23:26:04,285 INFO L226 Difference]: Without dead ends: 286 [2021-05-02 23:26:04,286 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 27789.4ms TimeCoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2021-05-02 23:26:04,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-05-02 23:26:04,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 285. [2021-05-02 23:26:04,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0035714285714286) internal successors, (281), 280 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:04,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 285 transitions. [2021-05-02 23:26:04,291 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 285 transitions. Word has length 282 [2021-05-02 23:26:04,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:04,292 INFO L480 AbstractCegarLoop]: Abstraction has 285 states and 285 transitions. [2021-05-02 23:26:04,292 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 139 states, 139 states have (on average 2.0) internal successors, (278), 138 states have internal predecessors, (278), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:04,292 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 285 transitions. [2021-05-02 23:26:04,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2021-05-02 23:26:04,293 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:04,293 INFO L523 BasicCegarLoop]: trace histogram [136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:04,293 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2021-05-02 23:26:04,293 INFO L428 AbstractCegarLoop]: === Iteration 138 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:04,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:04,294 INFO L82 PathProgramCache]: Analyzing trace with hash -335031379, now seen corresponding path program 136 times [2021-05-02 23:26:04,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:04,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673701443] [2021-05-02 23:26:04,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:04,301 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:04,302 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:04,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:28,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:26:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:26:28,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:26:28,466 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:26:28,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673701443] [2021-05-02 23:26:28,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1673701443] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:26:28,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:26:28,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2021-05-02 23:26:28,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299108204] [2021-05-02 23:26:28,467 INFO L460 AbstractCegarLoop]: Interpolant automaton has 140 states [2021-05-02 23:26:28,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:26:28,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2021-05-02 23:26:28,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:26:28,470 INFO L87 Difference]: Start difference. First operand 285 states and 285 transitions. Second operand has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:31,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:26:31,923 INFO L93 Difference]: Finished difference Result 294 states and 294 transitions. [2021-05-02 23:26:31,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2021-05-02 23:26:31,932 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2021-05-02 23:26:31,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:26:31,933 INFO L225 Difference]: With dead ends: 294 [2021-05-02 23:26:31,934 INFO L226 Difference]: Without dead ends: 288 [2021-05-02 23:26:31,935 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 23855.6ms TimeCoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2021-05-02 23:26:31,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2021-05-02 23:26:31,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 287. [2021-05-02 23:26:31,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.00354609929078) internal successors, (283), 282 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:31,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 287 transitions. [2021-05-02 23:26:31,942 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 287 transitions. Word has length 284 [2021-05-02 23:26:31,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:26:31,943 INFO L480 AbstractCegarLoop]: Abstraction has 287 states and 287 transitions. [2021-05-02 23:26:31,943 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 140 states, 140 states have (on average 2.0) internal successors, (280), 139 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:26:31,943 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 287 transitions. [2021-05-02 23:26:31,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2021-05-02 23:26:31,944 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:26:31,944 INFO L523 BasicCegarLoop]: trace histogram [137, 137, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:26:31,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2021-05-02 23:26:31,945 INFO L428 AbstractCegarLoop]: === Iteration 139 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:26:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:26:31,945 INFO L82 PathProgramCache]: Analyzing trace with hash -683329649, now seen corresponding path program 137 times [2021-05-02 23:26:31,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:26:31,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356247178] [2021-05-02 23:26:31,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:26:31,967 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:26:31,969 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:26:32,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:10,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:10,767 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:10,767 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356247178] [2021-05-02 23:27:10,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356247178] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:10,768 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:10,768 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2021-05-02 23:27:10,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808479873] [2021-05-02 23:27:10,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 141 states [2021-05-02 23:27:10,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2021-05-02 23:27:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:27:10,771 INFO L87 Difference]: Start difference. First operand 287 states and 287 transitions. Second operand has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:14,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:14,177 INFO L93 Difference]: Finished difference Result 296 states and 296 transitions. [2021-05-02 23:27:14,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2021-05-02 23:27:14,186 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2021-05-02 23:27:14,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:14,188 INFO L225 Difference]: With dead ends: 296 [2021-05-02 23:27:14,188 INFO L226 Difference]: Without dead ends: 290 [2021-05-02 23:27:14,189 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 38225.2ms TimeCoverageRelationStatistics Valid=9732, Invalid=10008, Unknown=0, NotChecked=0, Total=19740 [2021-05-02 23:27:14,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-05-02 23:27:14,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2021-05-02 23:27:14,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0035211267605635) internal successors, (285), 284 states have internal predecessors, (285), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:14,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 289 transitions. [2021-05-02 23:27:14,194 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 289 transitions. Word has length 286 [2021-05-02 23:27:14,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:14,194 INFO L480 AbstractCegarLoop]: Abstraction has 289 states and 289 transitions. [2021-05-02 23:27:14,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 141 states, 141 states have (on average 2.0) internal successors, (282), 140 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:14,194 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 289 transitions. [2021-05-02 23:27:14,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2021-05-02 23:27:14,195 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:14,196 INFO L523 BasicCegarLoop]: trace histogram [138, 138, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:14,196 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2021-05-02 23:27:14,196 INFO L428 AbstractCegarLoop]: === Iteration 140 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:14,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:14,196 INFO L82 PathProgramCache]: Analyzing trace with hash -390518031, now seen corresponding path program 138 times [2021-05-02 23:27:14,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:14,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1745177] [2021-05-02 23:27:14,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:14,206 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:14,208 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:14,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:50,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:27:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:27:50,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:27:50,283 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:27:50,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1745177] [2021-05-02 23:27:50,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1745177] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:27:50,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:27:50,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2021-05-02 23:27:50,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488235059] [2021-05-02 23:27:50,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 142 states [2021-05-02 23:27:50,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:27:50,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2021-05-02 23:27:50,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:27:50,286 INFO L87 Difference]: Start difference. First operand 289 states and 289 transitions. Second operand has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:51,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:27:51,348 INFO L93 Difference]: Finished difference Result 298 states and 298 transitions. [2021-05-02 23:27:51,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2021-05-02 23:27:51,349 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 288 [2021-05-02 23:27:51,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:27:51,350 INFO L225 Difference]: With dead ends: 298 [2021-05-02 23:27:51,350 INFO L226 Difference]: Without dead ends: 292 [2021-05-02 23:27:51,351 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 35584.8ms TimeCoverageRelationStatistics Valid=9872, Invalid=10150, Unknown=0, NotChecked=0, Total=20022 [2021-05-02 23:27:51,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2021-05-02 23:27:51,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 291. [2021-05-02 23:27:51,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 291 states, 286 states have (on average 1.0034965034965035) internal successors, (287), 286 states have internal predecessors, (287), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:51,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 291 states to 291 states and 291 transitions. [2021-05-02 23:27:51,355 INFO L78 Accepts]: Start accepts. Automaton has 291 states and 291 transitions. Word has length 288 [2021-05-02 23:27:51,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:27:51,355 INFO L480 AbstractCegarLoop]: Abstraction has 291 states and 291 transitions. [2021-05-02 23:27:51,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 142 states, 142 states have (on average 2.0) internal successors, (284), 141 states have internal predecessors, (284), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:27:51,355 INFO L276 IsEmpty]: Start isEmpty. Operand 291 states and 291 transitions. [2021-05-02 23:27:51,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2021-05-02 23:27:51,356 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:27:51,356 INFO L523 BasicCegarLoop]: trace histogram [139, 139, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:27:51,356 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2021-05-02 23:27:51,356 INFO L428 AbstractCegarLoop]: === Iteration 141 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:27:51,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:27:51,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1828572627, now seen corresponding path program 139 times [2021-05-02 23:27:51,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:27:51,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828496023] [2021-05-02 23:27:51,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:27:51,361 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:27:51,362 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:27:51,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:11,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:12,003 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:12,003 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:12,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828496023] [2021-05-02 23:28:12,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828496023] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:12,004 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:12,004 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2021-05-02 23:28:12,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795731065] [2021-05-02 23:28:12,004 INFO L460 AbstractCegarLoop]: Interpolant automaton has 143 states [2021-05-02 23:28:12,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:12,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2021-05-02 23:28:12,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:28:12,007 INFO L87 Difference]: Start difference. First operand 291 states and 291 transitions. Second operand has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:13,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-02 23:28:13,266 INFO L93 Difference]: Finished difference Result 300 states and 300 transitions. [2021-05-02 23:28:13,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2021-05-02 23:28:13,268 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2021-05-02 23:28:13,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-02 23:28:13,269 INFO L225 Difference]: With dead ends: 300 [2021-05-02 23:28:13,270 INFO L226 Difference]: Without dead ends: 294 [2021-05-02 23:28:13,271 INFO L779 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 20353.5ms TimeCoverageRelationStatistics Valid=10013, Invalid=10293, Unknown=0, NotChecked=0, Total=20306 [2021-05-02 23:28:13,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2021-05-02 23:28:13,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 293. [2021-05-02 23:28:13,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0034722222222223) internal successors, (289), 288 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:13,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 293 transitions. [2021-05-02 23:28:13,276 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 293 transitions. Word has length 290 [2021-05-02 23:28:13,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-02 23:28:13,276 INFO L480 AbstractCegarLoop]: Abstraction has 293 states and 293 transitions. [2021-05-02 23:28:13,276 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 143 states, 143 states have (on average 2.0) internal successors, (286), 142 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2021-05-02 23:28:13,276 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 293 transitions. [2021-05-02 23:28:13,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2021-05-02 23:28:13,277 INFO L515 BasicCegarLoop]: Found error trace [2021-05-02 23:28:13,277 INFO L523 BasicCegarLoop]: trace histogram [140, 140, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-02 23:28:13,277 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2021-05-02 23:28:13,278 INFO L428 AbstractCegarLoop]: === Iteration 142 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2021-05-02 23:28:13,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-02 23:28:13,278 INFO L82 PathProgramCache]: Analyzing trace with hash -224051147, now seen corresponding path program 140 times [2021-05-02 23:28:13,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2021-05-02 23:28:13,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521969237] [2021-05-02 23:28:13,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-02 23:28:13,284 WARN L74 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2021-05-02 23:28:13,285 INFO L224 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2021-05-02 23:28:13,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:33,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2021-05-02 23:28:33,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-02 23:28:33,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-02 23:28:33,698 INFO L179 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2021-05-02 23:28:33,698 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521969237] [2021-05-02 23:28:33,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModulePreferences [521969237] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-02 23:28:33,699 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-02 23:28:33,699 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2021-05-02 23:28:33,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130316351] [2021-05-02 23:28:33,699 INFO L460 AbstractCegarLoop]: Interpolant automaton has 144 states [2021-05-02 23:28:33,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2021-05-02 23:28:33,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2021-05-02 23:28:33,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10155, Invalid=10437, Unknown=0, NotChecked=0, Total=20592 [2021-05-02 23:28:33,701 INFO L87 Difference]: Start difference. First operand 293 states and 293 transitions. Second operand has 144 states, 144 states have (on average 2.0) internal successors, (288), 143 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)