/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops/sum01-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-b030c9e [2022-03-20 17:46:57,999 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-03-20 17:46:58,001 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-03-20 17:46:58,021 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-03-20 17:46:58,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-03-20 17:46:58,060 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-03-20 17:46:58,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-03-20 17:46:58,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-03-20 17:46:58,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-03-20 17:46:58,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-03-20 17:46:58,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-03-20 17:46:58,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * Use constant arrays=true [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-03-20 17:46:58,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-03-20 17:46:58,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:58,075 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-03-20 17:46:58,075 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2022-03-20 17:46:58,075 INFO L138 SettingsManager]: * Trace refinement strategy=ACCELERATED_INTERPOLATION [2022-03-20 17:46:58,075 INFO L138 SettingsManager]: * Trace refinement strategy used in Accelerated Interpolation=CAMEL [2022-03-20 17:46:58,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-03-20 17:46:58,075 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-03-20 17:46:58,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-03-20 17:46:58,262 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-03-20 17:46:58,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-03-20 17:46:58,277 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-03-20 17:46:58,278 INFO L271 PluginConnector]: Initializing CDTParser... [2022-03-20 17:46:58,278 INFO L275 PluginConnector]: CDTParser initialized [2022-03-20 17:46:58,279 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-2.i [2022-03-20 17:46:58,335 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766f2f88f/bcf10125970142f195d95e8984a48adb/FLAG550b4c643 [2022-03-20 17:46:58,704 INFO L306 CDTParser]: Found 1 translation units. [2022-03-20 17:46:58,704 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i [2022-03-20 17:46:58,711 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766f2f88f/bcf10125970142f195d95e8984a48adb/FLAG550b4c643 [2022-03-20 17:46:58,719 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/766f2f88f/bcf10125970142f195d95e8984a48adb [2022-03-20 17:46:58,720 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-03-20 17:46:58,721 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-03-20 17:46:58,732 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:58,732 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-03-20 17:46:58,735 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-03-20 17:46:58,735 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,736 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c62932f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58, skipping insertion in model container [2022-03-20 17:46:58,736 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,740 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-03-20 17:46:58,748 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-03-20 17:46:58,870 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2022-03-20 17:46:58,877 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:58,881 INFO L203 MainTranslator]: Completed pre-run [2022-03-20 17:46:58,888 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-2.i[849,862] [2022-03-20 17:46:58,890 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-03-20 17:46:58,897 INFO L208 MainTranslator]: Completed translation [2022-03-20 17:46:58,898 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58 WrapperNode [2022-03-20 17:46:58,898 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-03-20 17:46:58,898 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-03-20 17:46:58,898 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-03-20 17:46:58,899 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-03-20 17:46:58,905 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,905 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,909 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,909 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,911 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,913 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,913 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,914 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-03-20 17:46:58,915 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-03-20 17:46:58,915 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-03-20 17:46:58,915 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-03-20 17:46:58,916 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (1/1) ... [2022-03-20 17:46:58,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-03-20 17:46:58,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-03-20 17:46:58,951 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-03-20 17:46:58,952 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-03-20 17:46:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-03-20 17:46:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-03-20 17:46:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-03-20 17:46:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-03-20 17:46:58,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-03-20 17:46:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-03-20 17:46:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-03-20 17:46:58,979 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-03-20 17:46:58,980 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-03-20 17:46:59,023 INFO L234 CfgBuilder]: Building ICFG [2022-03-20 17:46:59,024 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-03-20 17:46:59,096 INFO L275 CfgBuilder]: Performing block encoding [2022-03-20 17:46:59,101 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-03-20 17:46:59,102 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-03-20 17:46:59,103 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:59 BoogieIcfgContainer [2022-03-20 17:46:59,104 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-03-20 17:46:59,106 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-03-20 17:46:59,106 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-03-20 17:46:59,108 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-03-20 17:46:59,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.03 05:46:58" (1/3) ... [2022-03-20 17:46:59,109 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5c85cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:59, skipping insertion in model container [2022-03-20 17:46:59,109 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.03 05:46:58" (2/3) ... [2022-03-20 17:46:59,123 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1c5c85cb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.03 05:46:59, skipping insertion in model container [2022-03-20 17:46:59,123 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.03 05:46:59" (3/3) ... [2022-03-20 17:46:59,124 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-2.i [2022-03-20 17:46:59,127 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-03-20 17:46:59,127 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-03-20 17:46:59,184 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-03-20 17:46:59,188 INFO L340 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=Craig_NestedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP [2022-03-20 17:46:59,189 INFO L341 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-03-20 17:46:59,197 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) 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) [2022-03-20 17:46:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-03-20 17:46:59,202 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:59,202 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:59,203 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:59,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:59,206 INFO L85 PathProgramCache]: Analyzing trace with hash -241432906, now seen corresponding path program 1 times [2022-03-20 17:46:59,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:59,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [842108037] [2022-03-20 17:46:59,220 INFO L202 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-03-20 17:46:59,220 INFO L85 PathProgramCache]: Analyzing trace with hash -241432906, now seen corresponding path program 2 times [2022-03-20 17:46:59,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:59,222 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408418670] [2022-03-20 17:46:59,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:59,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:59,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:59,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:59,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:59,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:59,427 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1408418670] [2022-03-20 17:46:59,427 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1408418670] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:59,428 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:59,428 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:59,429 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:59,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [842108037] [2022-03-20 17:46:59,430 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [842108037] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:59,430 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:59,430 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-03-20 17:46:59,430 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208206563] [2022-03-20 17:46:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:59,433 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-03-20 17:46:59,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:59,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-03-20 17:46:59,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-03-20 17:46:59,454 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) 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 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2022-03-20 17:46:59,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:46:59,544 INFO L93 Difference]: Finished difference Result 39 states and 47 transitions. [2022-03-20 17:46:59,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:46:59,546 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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 [2022-03-20 17:46:59,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:46:59,549 INFO L225 Difference]: With dead ends: 39 [2022-03-20 17:46:59,549 INFO L226 Difference]: Without dead ends: 15 [2022-03-20 17:46:59,552 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:46:59,554 INFO L913 BasicCegarLoop]: 14 mSDtfsCounter, 25 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:46:59,554 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 35 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:46:59,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2022-03-20 17:46:59,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2022-03-20 17:46:59,583 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) [2022-03-20 17:46:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2022-03-20 17:46:59,585 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2022-03-20 17:46:59,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:46:59,585 INFO L478 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2022-03-20 17:46:59,585 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 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) [2022-03-20 17:46:59,585 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2022-03-20 17:46:59,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-03-20 17:46:59,586 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:46:59,586 INFO L499 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:46:59,586 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-03-20 17:46:59,586 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:46:59,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:46:59,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1042759188, now seen corresponding path program 1 times [2022-03-20 17:46:59,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:59,587 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2094053664] [2022-03-20 17:46:59,758 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:46:59,760 INFO L85 PathProgramCache]: Analyzing trace with hash 2056142408, now seen corresponding path program 1 times [2022-03-20 17:46:59,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:46:59,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595489635] [2022-03-20 17:46:59,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:46:59,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:46:59,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:59,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:46:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:46:59,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:46:59,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:46:59,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595489635] [2022-03-20 17:46:59,880 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595489635] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:59,880 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:59,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:46:59,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:46:59,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2094053664] [2022-03-20 17:46:59,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2094053664] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:46:59,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:46:59,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:46:59,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116554949] [2022-03-20 17:46:59,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:46:59,933 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-03-20 17:46:59,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:46:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-03-20 17:46:59,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2022-03-20 17:46:59,944 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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) [2022-03-20 17:47:00,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:00,017 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2022-03-20 17:47:00,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-03-20 17:47:00,018 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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 [2022-03-20 17:47:00,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:00,018 INFO L225 Difference]: With dead ends: 22 [2022-03-20 17:47:00,019 INFO L226 Difference]: Without dead ends: 17 [2022-03-20 17:47:00,019 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:47:00,020 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:00,020 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 43 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:47:00,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-03-20 17:47:00,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-03-20 17:47:00,023 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) [2022-03-20 17:47:00,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2022-03-20 17:47:00,024 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2022-03-20 17:47:00,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:00,024 INFO L478 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2022-03-20 17:47:00,024 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 7 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) [2022-03-20 17:47:00,024 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2022-03-20 17:47:00,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-03-20 17:47:00,025 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:00,025 INFO L499 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:00,025 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-03-20 17:47:00,025 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:00,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:00,026 INFO L85 PathProgramCache]: Analyzing trace with hash -1799219726, now seen corresponding path program 2 times [2022-03-20 17:47:00,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [626250034] [2022-03-20 17:47:00,139 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:00,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2115247752, now seen corresponding path program 1 times [2022-03-20 17:47:00,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:00,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185750660] [2022-03-20 17:47:00,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:00,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:00,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:00,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:00,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:00,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185750660] [2022-03-20 17:47:00,220 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185750660] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:00,220 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:00,221 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:00,288 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:00,288 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [626250034] [2022-03-20 17:47:00,288 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [626250034] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:00,288 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:00,288 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-03-20 17:47:00,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814355682] [2022-03-20 17:47:00,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:00,289 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-03-20 17:47:00,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-03-20 17:47:00,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-03-20 17:47:00,291 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 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) [2022-03-20 17:47:00,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:00,412 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2022-03-20 17:47:00,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-03-20 17:47:00,412 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 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 [2022-03-20 17:47:00,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:00,413 INFO L225 Difference]: With dead ends: 24 [2022-03-20 17:47:00,413 INFO L226 Difference]: Without dead ends: 19 [2022-03-20 17:47:00,413 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-03-20 17:47:00,415 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:00,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-03-20 17:47:00,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-03-20 17:47:00,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-03-20 17:47:00,422 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) [2022-03-20 17:47:00,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2022-03-20 17:47:00,422 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2022-03-20 17:47:00,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:00,423 INFO L478 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2022-03-20 17:47:00,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 9 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) [2022-03-20 17:47:00,423 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2022-03-20 17:47:00,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-03-20 17:47:00,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:00,423 INFO L499 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:00,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-03-20 17:47:00,424 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:00,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:00,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1341755824, now seen corresponding path program 3 times [2022-03-20 17:47:00,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1224597633] [2022-03-20 17:47:00,526 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:00,527 INFO L85 PathProgramCache]: Analyzing trace with hash -2120614200, now seen corresponding path program 1 times [2022-03-20 17:47:00,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:00,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145802529] [2022-03-20 17:47:00,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:00,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:00,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:00,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:00,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:00,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:00,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145802529] [2022-03-20 17:47:00,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145802529] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:00,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:00,600 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:00,693 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:00,693 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1224597633] [2022-03-20 17:47:00,693 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1224597633] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:00,693 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:00,694 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-03-20 17:47:00,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338436731] [2022-03-20 17:47:00,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:00,694 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-03-20 17:47:00,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-03-20 17:47:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-03-20 17:47:00,695 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 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) [2022-03-20 17:47:00,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:00,890 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2022-03-20 17:47:00,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-03-20 17:47:00,890 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 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 [2022-03-20 17:47:00,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:00,891 INFO L225 Difference]: With dead ends: 26 [2022-03-20 17:47:00,891 INFO L226 Difference]: Without dead ends: 21 [2022-03-20 17:47:00,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:47:00,892 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:00,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 63 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2022-03-20 17:47:00,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2022-03-20 17:47:00,896 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) [2022-03-20 17:47:00,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2022-03-20 17:47:00,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2022-03-20 17:47:00,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:00,896 INFO L478 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2022-03-20 17:47:00,897 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 11 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) [2022-03-20 17:47:00,897 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2022-03-20 17:47:00,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-03-20 17:47:00,897 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:00,897 INFO L499 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:00,897 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-03-20 17:47:00,898 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:00,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:00,898 INFO L85 PathProgramCache]: Analyzing trace with hash 194389806, now seen corresponding path program 4 times [2022-03-20 17:47:00,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:00,898 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1588875356] [2022-03-20 17:47:01,093 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:01,094 INFO L85 PathProgramCache]: Analyzing trace with hash -2061508856, now seen corresponding path program 1 times [2022-03-20 17:47:01,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:01,094 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153207865] [2022-03-20 17:47:01,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:01,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:01,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,187 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:01,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:01,187 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153207865] [2022-03-20 17:47:01,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153207865] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:01,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:01,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:01,297 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:01,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1588875356] [2022-03-20 17:47:01,297 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1588875356] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:01,297 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:01,297 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-03-20 17:47:01,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465344192] [2022-03-20 17:47:01,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:01,298 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-03-20 17:47:01,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:01,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-03-20 17:47:01,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-03-20 17:47:01,299 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 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) [2022-03-20 17:47:01,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:01,473 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2022-03-20 17:47:01,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-03-20 17:47:01,473 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 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 [2022-03-20 17:47:01,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:01,475 INFO L225 Difference]: With dead ends: 28 [2022-03-20 17:47:01,475 INFO L226 Difference]: Without dead ends: 23 [2022-03-20 17:47:01,475 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-03-20 17:47:01,476 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:01,477 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 73 Invalid, 203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:01,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-03-20 17:47:01,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-03-20 17:47:01,485 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) [2022-03-20 17:47:01,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2022-03-20 17:47:01,486 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2022-03-20 17:47:01,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:01,487 INFO L478 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2022-03-20 17:47:01,488 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 13 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) [2022-03-20 17:47:01,488 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2022-03-20 17:47:01,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-03-20 17:47:01,488 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:01,489 INFO L499 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:01,489 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-03-20 17:47:01,489 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:01,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:01,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1038409588, now seen corresponding path program 5 times [2022-03-20 17:47:01,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:01,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1694242195] [2022-03-20 17:47:01,585 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:01,586 INFO L85 PathProgramCache]: Analyzing trace with hash -2002403512, now seen corresponding path program 1 times [2022-03-20 17:47:01,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:01,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40032206] [2022-03-20 17:47:01,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:01,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:01,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:01,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:01,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:01,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40032206] [2022-03-20 17:47:01,632 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40032206] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:01,633 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:01,633 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:01,796 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:01,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1694242195] [2022-03-20 17:47:01,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1694242195] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:01,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:01,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-03-20 17:47:01,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203953026] [2022-03-20 17:47:01,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:01,797 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-03-20 17:47:01,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:01,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-03-20 17:47:01,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-03-20 17:47:01,798 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 17 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 15 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) [2022-03-20 17:47:02,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:02,043 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2022-03-20 17:47:02,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-03-20 17:47:02,044 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 15 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 [2022-03-20 17:47:02,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:02,045 INFO L225 Difference]: With dead ends: 30 [2022-03-20 17:47:02,045 INFO L226 Difference]: Without dead ends: 25 [2022-03-20 17:47:02,045 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:47:02,047 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:02,047 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 83 Invalid, 265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 252 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:02,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-03-20 17:47:02,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-03-20 17:47:02,052 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) [2022-03-20 17:47:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2022-03-20 17:47:02,054 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2022-03-20 17:47:02,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:02,054 INFO L478 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2022-03-20 17:47:02,054 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 15 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) [2022-03-20 17:47:02,054 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2022-03-20 17:47:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-03-20 17:47:02,055 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:02,055 INFO L499 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:02,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-03-20 17:47:02,056 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:02,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:02,056 INFO L85 PathProgramCache]: Analyzing trace with hash -347653526, now seen corresponding path program 6 times [2022-03-20 17:47:02,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:02,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [211955831] [2022-03-20 17:47:02,223 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:02,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1943298168, now seen corresponding path program 1 times [2022-03-20 17:47:02,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:02,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981079578] [2022-03-20 17:47:02,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:02,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:02,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:02,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:02,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:02,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:02,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981079578] [2022-03-20 17:47:02,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981079578] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:02,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:02,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:02,445 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:02,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [211955831] [2022-03-20 17:47:02,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [211955831] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:02,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:02,445 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-03-20 17:47:02,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849972643] [2022-03-20 17:47:02,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:02,446 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-03-20 17:47:02,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:02,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-03-20 17:47:02,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2022-03-20 17:47:02,446 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 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) [2022-03-20 17:47:02,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:02,716 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2022-03-20 17:47:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-03-20 17:47:02,717 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 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 [2022-03-20 17:47:02,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:02,717 INFO L225 Difference]: With dead ends: 32 [2022-03-20 17:47:02,717 INFO L226 Difference]: Without dead ends: 27 [2022-03-20 17:47:02,718 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:47:02,718 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:02,719 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 93 Invalid, 335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:02,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-03-20 17:47:02,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-03-20 17:47:02,721 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) [2022-03-20 17:47:02,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2022-03-20 17:47:02,722 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2022-03-20 17:47:02,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:02,722 INFO L478 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2022-03-20 17:47:02,722 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 17 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) [2022-03-20 17:47:02,722 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2022-03-20 17:47:02,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-03-20 17:47:02,722 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:02,722 INFO L499 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:02,723 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-03-20 17:47:02,723 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:02,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:02,723 INFO L85 PathProgramCache]: Analyzing trace with hash 2043958472, now seen corresponding path program 7 times [2022-03-20 17:47:02,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:02,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [995710480] [2022-03-20 17:47:02,854 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:02,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1884192824, now seen corresponding path program 1 times [2022-03-20 17:47:02,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:02,855 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340066500] [2022-03-20 17:47:02,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:02,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:02,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:02,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:02,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:02,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:02,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340066500] [2022-03-20 17:47:02,911 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340066500] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:02,911 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:02,911 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:03,148 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:03,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [995710480] [2022-03-20 17:47:03,149 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [995710480] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:03,149 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:03,149 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-03-20 17:47:03,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168613305] [2022-03-20 17:47:03,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:03,149 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-03-20 17:47:03,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:03,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-03-20 17:47:03,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2022-03-20 17:47:03,150 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 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) [2022-03-20 17:47:03,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:03,476 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2022-03-20 17:47:03,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-03-20 17:47:03,477 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 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 [2022-03-20 17:47:03,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:03,477 INFO L225 Difference]: With dead ends: 34 [2022-03-20 17:47:03,477 INFO L226 Difference]: Without dead ends: 29 [2022-03-20 17:47:03,478 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:47:03,478 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 413 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:03,478 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 103 Invalid, 413 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-03-20 17:47:03,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-03-20 17:47:03,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-03-20 17:47:03,481 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) [2022-03-20 17:47:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2022-03-20 17:47:03,481 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2022-03-20 17:47:03,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:03,482 INFO L478 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2022-03-20 17:47:03,484 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 19 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) [2022-03-20 17:47:03,484 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2022-03-20 17:47:03,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-03-20 17:47:03,484 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:03,484 INFO L499 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:03,484 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-03-20 17:47:03,484 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:03,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:03,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1719382106, now seen corresponding path program 8 times [2022-03-20 17:47:03,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:03,485 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [334897309] [2022-03-20 17:47:03,603 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1825087480, now seen corresponding path program 1 times [2022-03-20 17:47:03,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:03,603 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171153871] [2022-03-20 17:47:03,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:03,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:03,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:03,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:03,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:03,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:03,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171153871] [2022-03-20 17:47:03,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171153871] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:03,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:03,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:03,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:03,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [334897309] [2022-03-20 17:47:03,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [334897309] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:03,895 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:03,895 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-03-20 17:47:03,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116050207] [2022-03-20 17:47:03,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:03,895 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-03-20 17:47:03,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:03,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-03-20 17:47:03,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2022-03-20 17:47:03,896 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 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) [2022-03-20 17:47:04,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:04,305 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2022-03-20 17:47:04,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-03-20 17:47:04,306 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 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 [2022-03-20 17:47:04,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:04,306 INFO L225 Difference]: With dead ends: 36 [2022-03-20 17:47:04,306 INFO L226 Difference]: Without dead ends: 31 [2022-03-20 17:47:04,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2022-03-20 17:47:04,307 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 459 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 459 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:04,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 108 Invalid, 478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 459 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:04,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-03-20 17:47:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-03-20 17:47:04,310 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) [2022-03-20 17:47:04,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2022-03-20 17:47:04,310 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2022-03-20 17:47:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:04,311 INFO L478 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2022-03-20 17:47:04,311 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 21 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) [2022-03-20 17:47:04,311 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2022-03-20 17:47:04,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-03-20 17:47:04,311 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:04,311 INFO L499 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:04,311 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-03-20 17:47:04,312 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:04,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:04,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1927214332, now seen corresponding path program 9 times [2022-03-20 17:47:04,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:04,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [178779720] [2022-03-20 17:47:04,401 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:04,402 INFO L85 PathProgramCache]: Analyzing trace with hash -1765982136, now seen corresponding path program 1 times [2022-03-20 17:47:04,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:04,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254983493] [2022-03-20 17:47:04,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:04,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:04,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:04,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:04,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:04,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:04,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254983493] [2022-03-20 17:47:04,446 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254983493] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:04,446 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:04,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:04,741 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:04,741 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [178779720] [2022-03-20 17:47:04,742 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [178779720] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:04,742 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:04,742 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-03-20 17:47:04,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896218732] [2022-03-20 17:47:04,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:04,742 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-03-20 17:47:04,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:04,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-03-20 17:47:04,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2022-03-20 17:47:04,743 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 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) [2022-03-20 17:47:05,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:05,213 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2022-03-20 17:47:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-03-20 17:47:05,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 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 [2022-03-20 17:47:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:05,214 INFO L225 Difference]: With dead ends: 38 [2022-03-20 17:47:05,214 INFO L226 Difference]: Without dead ends: 33 [2022-03-20 17:47:05,215 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1850, Unknown=0, NotChecked=0, Total=1980 [2022-03-20 17:47:05,215 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 549 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:05,215 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 549 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-03-20 17:47:05,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2022-03-20 17:47:05,218 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) [2022-03-20 17:47:05,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2022-03-20 17:47:05,218 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2022-03-20 17:47:05,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:05,218 INFO L478 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2022-03-20 17:47:05,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.04) internal successors, (26), 23 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) [2022-03-20 17:47:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2022-03-20 17:47:05,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-03-20 17:47:05,219 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:05,219 INFO L499 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:05,219 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-03-20 17:47:05,219 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash 209479394, now seen corresponding path program 10 times [2022-03-20 17:47:05,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:05,220 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [265927997] [2022-03-20 17:47:05,357 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:05,358 INFO L85 PathProgramCache]: Analyzing trace with hash -1706876792, now seen corresponding path program 1 times [2022-03-20 17:47:05,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:05,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728472509] [2022-03-20 17:47:05,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:05,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:05,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:05,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:05,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:05,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:05,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:05,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728472509] [2022-03-20 17:47:05,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728472509] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:05,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:05,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:05,739 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:05,740 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [265927997] [2022-03-20 17:47:05,740 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [265927997] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:05,740 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:05,740 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-03-20 17:47:05,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724141184] [2022-03-20 17:47:05,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:05,740 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-03-20 17:47:05,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:05,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-03-20 17:47:05,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-03-20 17:47:05,741 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 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) [2022-03-20 17:47:06,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:06,261 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2022-03-20 17:47:06,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-03-20 17:47:06,263 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 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 [2022-03-20 17:47:06,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:06,263 INFO L225 Difference]: With dead ends: 40 [2022-03-20 17:47:06,263 INFO L226 Difference]: Without dead ends: 35 [2022-03-20 17:47:06,264 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=142, Invalid=2210, Unknown=0, NotChecked=0, Total=2352 [2022-03-20 17:47:06,264 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 672 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 672 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:06,265 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 133 Invalid, 695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 672 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:06,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-03-20 17:47:06,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-03-20 17:47:06,268 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) [2022-03-20 17:47:06,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2022-03-20 17:47:06,268 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2022-03-20 17:47:06,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:06,270 INFO L478 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2022-03-20 17:47:06,270 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.037037037037037) internal successors, (28), 25 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) [2022-03-20 17:47:06,270 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2022-03-20 17:47:06,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-03-20 17:47:06,274 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:06,274 INFO L499 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:06,274 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-03-20 17:47:06,274 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:06,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:06,275 INFO L85 PathProgramCache]: Analyzing trace with hash 577782592, now seen corresponding path program 11 times [2022-03-20 17:47:06,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:06,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2026394123] [2022-03-20 17:47:06,391 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:06,392 INFO L85 PathProgramCache]: Analyzing trace with hash -1647771448, now seen corresponding path program 1 times [2022-03-20 17:47:06,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:06,392 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662934115] [2022-03-20 17:47:06,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:06,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:06,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:06,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:06,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:06,435 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:06,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:06,435 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662934115] [2022-03-20 17:47:06,435 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662934115] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:06,435 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:06,435 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:06,797 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:06,797 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2026394123] [2022-03-20 17:47:06,797 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2026394123] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:06,797 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:06,797 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-03-20 17:47:06,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051544384] [2022-03-20 17:47:06,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:06,798 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-03-20 17:47:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-03-20 17:47:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2022-03-20 17:47:06,798 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 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) [2022-03-20 17:47:07,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:07,416 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2022-03-20 17:47:07,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-03-20 17:47:07,416 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 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 [2022-03-20 17:47:07,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:07,417 INFO L225 Difference]: With dead ends: 42 [2022-03-20 17:47:07,417 INFO L226 Difference]: Without dead ends: 37 [2022-03-20 17:47:07,418 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=154, Invalid=2602, Unknown=0, NotChecked=0, Total=2756 [2022-03-20 17:47:07,418 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:07,419 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 138 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-03-20 17:47:07,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-03-20 17:47:07,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-03-20 17:47:07,422 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) [2022-03-20 17:47:07,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2022-03-20 17:47:07,422 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2022-03-20 17:47:07,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:07,422 INFO L478 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2022-03-20 17:47:07,423 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 27 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) [2022-03-20 17:47:07,423 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2022-03-20 17:47:07,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-03-20 17:47:07,423 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:07,423 INFO L499 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:07,423 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-03-20 17:47:07,423 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:07,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:07,424 INFO L85 PathProgramCache]: Analyzing trace with hash -1965129698, now seen corresponding path program 12 times [2022-03-20 17:47:07,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:07,424 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [834147220] [2022-03-20 17:47:07,555 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:07,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1588666104, now seen corresponding path program 1 times [2022-03-20 17:47:07,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:07,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392620010] [2022-03-20 17:47:07,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:07,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:07,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:07,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:07,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:07,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:07,620 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392620010] [2022-03-20 17:47:07,620 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392620010] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:07,621 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:07,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:47:08,075 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:08,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [834147220] [2022-03-20 17:47:08,075 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [834147220] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:08,075 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:08,075 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-03-20 17:47:08,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596240947] [2022-03-20 17:47:08,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:08,075 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-03-20 17:47:08,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:08,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-03-20 17:47:08,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-03-20 17:47:08,076 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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) [2022-03-20 17:47:08,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:08,836 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2022-03-20 17:47:08,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-03-20 17:47:08,836 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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 [2022-03-20 17:47:08,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:08,836 INFO L225 Difference]: With dead ends: 44 [2022-03-20 17:47:08,837 INFO L226 Difference]: Without dead ends: 39 [2022-03-20 17:47:08,838 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=244, Invalid=3538, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 17:47:08,838 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:08,838 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 157 Invalid, 956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:47:08,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-03-20 17:47:08,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2022-03-20 17:47:08,841 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) [2022-03-20 17:47:08,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2022-03-20 17:47:08,842 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2022-03-20 17:47:08,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:08,842 INFO L478 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2022-03-20 17:47:08,842 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 30 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) [2022-03-20 17:47:08,842 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2022-03-20 17:47:08,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-03-20 17:47:08,842 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:08,842 INFO L499 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:08,842 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-03-20 17:47:08,843 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:08,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:08,843 INFO L85 PathProgramCache]: Analyzing trace with hash -1867448964, now seen corresponding path program 13 times [2022-03-20 17:47:08,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:08,843 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884744647] [2022-03-20 17:47:08,964 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:08,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1529560760, now seen corresponding path program 1 times [2022-03-20 17:47:08,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:08,965 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272559343] [2022-03-20 17:47:08,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:08,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:08,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:09,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:09,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:09,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:09,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272559343] [2022-03-20 17:47:09,036 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272559343] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:09,036 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:09,036 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:09,545 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:09,545 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884744647] [2022-03-20 17:47:09,545 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884744647] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:09,545 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:09,545 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-03-20 17:47:09,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811734503] [2022-03-20 17:47:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:09,545 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-03-20 17:47:09,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-03-20 17:47:09,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1054, Unknown=0, NotChecked=0, Total=1122 [2022-03-20 17:47:09,546 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 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) [2022-03-20 17:47:10,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:10,371 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2022-03-20 17:47:10,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-03-20 17:47:10,371 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 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 [2022-03-20 17:47:10,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:10,372 INFO L225 Difference]: With dead ends: 46 [2022-03-20 17:47:10,372 INFO L226 Difference]: Without dead ends: 41 [2022-03-20 17:47:10,373 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 467 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=3598, Unknown=0, NotChecked=0, Total=3782 [2022-03-20 17:47:10,373 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 989 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:10,373 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 1018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 989 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:47:10,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-03-20 17:47:10,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2022-03-20 17:47:10,376 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) [2022-03-20 17:47:10,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2022-03-20 17:47:10,377 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2022-03-20 17:47:10,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:10,377 INFO L478 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2022-03-20 17:47:10,377 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 31 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) [2022-03-20 17:47:10,377 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2022-03-20 17:47:10,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-03-20 17:47:10,377 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:10,377 INFO L499 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:10,377 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-03-20 17:47:10,378 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:10,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:10,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1809423194, now seen corresponding path program 14 times [2022-03-20 17:47:10,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:10,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [671759932] [2022-03-20 17:47:10,458 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:10,458 INFO L85 PathProgramCache]: Analyzing trace with hash -1470455416, now seen corresponding path program 1 times [2022-03-20 17:47:10,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:10,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016526957] [2022-03-20 17:47:10,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:10,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:10,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:10,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:10,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:10,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:10,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:10,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016526957] [2022-03-20 17:47:10,525 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016526957] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:10,525 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:10,525 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:11,057 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:11,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [671759932] [2022-03-20 17:47:11,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [671759932] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:11,057 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:11,057 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-03-20 17:47:11,057 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977933042] [2022-03-20 17:47:11,057 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:11,058 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-03-20 17:47:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-03-20 17:47:11,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-03-20 17:47:11,058 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 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) [2022-03-20 17:47:11,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:11,908 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2022-03-20 17:47:11,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-03-20 17:47:11,908 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 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 [2022-03-20 17:47:11,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:11,909 INFO L225 Difference]: With dead ends: 48 [2022-03-20 17:47:11,917 INFO L226 Difference]: Without dead ends: 43 [2022-03-20 17:47:11,919 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=196, Invalid=4094, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 17:47:11,921 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1152 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 1183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 1152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:11,921 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 173 Invalid, 1183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 1152 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-03-20 17:47:11,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-03-20 17:47:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-03-20 17:47:11,926 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) [2022-03-20 17:47:11,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2022-03-20 17:47:11,927 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2022-03-20 17:47:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:11,927 INFO L478 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2022-03-20 17:47:11,927 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 33 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) [2022-03-20 17:47:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2022-03-20 17:47:11,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-03-20 17:47:11,927 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:11,927 INFO L499 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:11,927 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-03-20 17:47:11,928 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash 525482424, now seen corresponding path program 15 times [2022-03-20 17:47:11,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:11,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [52678657] [2022-03-20 17:47:12,055 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:12,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1411350072, now seen corresponding path program 1 times [2022-03-20 17:47:12,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:12,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530011845] [2022-03-20 17:47:12,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:12,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:12,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:12,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:12,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:12,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:12,119 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530011845] [2022-03-20 17:47:12,119 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530011845] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:12,119 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:12,119 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:12,705 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:12,705 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [52678657] [2022-03-20 17:47:12,705 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [52678657] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:12,705 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:12,705 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-03-20 17:47:12,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825007726] [2022-03-20 17:47:12,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:12,706 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-03-20 17:47:12,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:12,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-03-20 17:47:12,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2022-03-20 17:47:12,707 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 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) [2022-03-20 17:47:13,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:13,638 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2022-03-20 17:47:13,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-03-20 17:47:13,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 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 [2022-03-20 17:47:13,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:13,639 INFO L225 Difference]: With dead ends: 50 [2022-03-20 17:47:13,639 INFO L226 Difference]: Without dead ends: 45 [2022-03-20 17:47:13,640 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2022-03-20 17:47:13,640 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1292 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 1325 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 1292 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:13,641 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 183 Invalid, 1325 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 1292 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:13,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-03-20 17:47:13,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-03-20 17:47:13,645 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) [2022-03-20 17:47:13,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2022-03-20 17:47:13,645 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2022-03-20 17:47:13,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:13,646 INFO L478 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2022-03-20 17:47:13,646 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.027027027027027) internal successors, (38), 35 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) [2022-03-20 17:47:13,646 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2022-03-20 17:47:13,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-03-20 17:47:13,646 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:13,646 INFO L499 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:13,646 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-03-20 17:47:13,646 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:13,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash -685983594, now seen corresponding path program 16 times [2022-03-20 17:47:13,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:13,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1729979956] [2022-03-20 17:47:13,733 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:13,734 INFO L85 PathProgramCache]: Analyzing trace with hash -1352244728, now seen corresponding path program 1 times [2022-03-20 17:47:13,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:13,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581647757] [2022-03-20 17:47:13,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:13,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:13,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:13,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:13,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:13,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:13,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581647757] [2022-03-20 17:47:13,766 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581647757] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:13,766 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:13,766 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:14,400 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:14,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1729979956] [2022-03-20 17:47:14,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1729979956] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:14,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:14,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-03-20 17:47:14,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768592383] [2022-03-20 17:47:14,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:14,400 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-03-20 17:47:14,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:14,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-03-20 17:47:14,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2022-03-20 17:47:14,401 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 39 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 37 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) [2022-03-20 17:47:15,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:15,376 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2022-03-20 17:47:15,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-03-20 17:47:15,376 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 37 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 [2022-03-20 17:47:15,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:15,377 INFO L225 Difference]: With dead ends: 52 [2022-03-20 17:47:15,377 INFO L226 Difference]: Without dead ends: 47 [2022-03-20 17:47:15,378 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=214, Invalid=5042, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 17:47:15,379 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 1403 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:15,379 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 188 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1403 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:15,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-03-20 17:47:15,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2022-03-20 17:47:15,382 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) [2022-03-20 17:47:15,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2022-03-20 17:47:15,383 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2022-03-20 17:47:15,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:15,383 INFO L478 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2022-03-20 17:47:15,383 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 37 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) [2022-03-20 17:47:15,383 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2022-03-20 17:47:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-03-20 17:47:15,383 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:15,383 INFO L499 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:15,384 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-03-20 17:47:15,384 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:15,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:15,384 INFO L85 PathProgramCache]: Analyzing trace with hash -968689676, now seen corresponding path program 17 times [2022-03-20 17:47:15,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:15,384 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1603739737] [2022-03-20 17:47:15,508 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:15,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1293139384, now seen corresponding path program 1 times [2022-03-20 17:47:15,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:15,508 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526969745] [2022-03-20 17:47:15,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:15,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:15,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:15,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:15,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:15,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:15,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:15,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526969745] [2022-03-20 17:47:15,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526969745] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:15,569 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:15,569 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:16,342 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:16,343 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1603739737] [2022-03-20 17:47:16,343 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1603739737] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:16,343 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:16,343 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-03-20 17:47:16,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084729874] [2022-03-20 17:47:16,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:16,343 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-03-20 17:47:16,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:16,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-03-20 17:47:16,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2022-03-20 17:47:16,344 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 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) [2022-03-20 17:47:17,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:17,437 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2022-03-20 17:47:17,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-03-20 17:47:17,437 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 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 [2022-03-20 17:47:17,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:17,438 INFO L225 Difference]: With dead ends: 54 [2022-03-20 17:47:17,438 INFO L226 Difference]: Without dead ends: 49 [2022-03-20 17:47:17,439 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 743 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=232, Invalid=5774, Unknown=0, NotChecked=0, Total=6006 [2022-03-20 17:47:17,440 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 1557 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:17,440 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 198 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1557 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:17,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-03-20 17:47:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-03-20 17:47:17,443 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) [2022-03-20 17:47:17,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2022-03-20 17:47:17,443 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2022-03-20 17:47:17,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:17,444 INFO L478 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2022-03-20 17:47:17,444 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.024390243902439) internal successors, (42), 39 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) [2022-03-20 17:47:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2022-03-20 17:47:17,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-03-20 17:47:17,444 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:17,444 INFO L499 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:17,444 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-03-20 17:47:17,444 INFO L403 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:17,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:17,445 INFO L85 PathProgramCache]: Analyzing trace with hash -2066294830, now seen corresponding path program 18 times [2022-03-20 17:47:17,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:17,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [709345327] [2022-03-20 17:47:17,552 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:17,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1234034040, now seen corresponding path program 1 times [2022-03-20 17:47:17,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:17,553 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229326069] [2022-03-20 17:47:17,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:17,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:17,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:17,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:17,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:17,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:17,610 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229326069] [2022-03-20 17:47:17,610 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229326069] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:17,610 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:17,611 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:18,360 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:18,361 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [709345327] [2022-03-20 17:47:18,361 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [709345327] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:18,361 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:18,361 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-03-20 17:47:18,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783504691] [2022-03-20 17:47:18,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:18,361 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-03-20 17:47:18,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:18,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-03-20 17:47:18,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2022-03-20 17:47:18,362 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 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) [2022-03-20 17:47:19,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:19,538 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2022-03-20 17:47:19,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-03-20 17:47:19,538 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 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 [2022-03-20 17:47:19,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:19,539 INFO L225 Difference]: With dead ends: 56 [2022-03-20 17:47:19,539 INFO L226 Difference]: Without dead ends: 51 [2022-03-20 17:47:19,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=244, Invalid=6398, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 17:47:19,541 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 1719 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 208 SdHoareTripleChecker+Invalid, 1758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 1719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:19,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 208 Invalid, 1758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 1719 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-03-20 17:47:19,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2022-03-20 17:47:19,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2022-03-20 17:47:19,545 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) [2022-03-20 17:47:19,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2022-03-20 17:47:19,545 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2022-03-20 17:47:19,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:19,545 INFO L478 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2022-03-20 17:47:19,545 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 41 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) [2022-03-20 17:47:19,546 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2022-03-20 17:47:19,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-03-20 17:47:19,546 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:19,546 INFO L499 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:19,546 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-03-20 17:47:19,546 INFO L403 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:19,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:19,546 INFO L85 PathProgramCache]: Analyzing trace with hash -302893008, now seen corresponding path program 19 times [2022-03-20 17:47:19,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:19,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1445563249] [2022-03-20 17:47:19,659 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:19,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1174928696, now seen corresponding path program 1 times [2022-03-20 17:47:19,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:19,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629742818] [2022-03-20 17:47:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:19,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:19,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:19,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:19,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:19,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:19,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:19,725 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629742818] [2022-03-20 17:47:19,725 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629742818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:19,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:19,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:20,534 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:20,534 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1445563249] [2022-03-20 17:47:20,535 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1445563249] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:20,535 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:20,535 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-03-20 17:47:20,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1880260855] [2022-03-20 17:47:20,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:20,535 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-03-20 17:47:20,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:20,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-03-20 17:47:20,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-03-20 17:47:20,537 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 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) [2022-03-20 17:47:21,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:21,852 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2022-03-20 17:47:21,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-03-20 17:47:21,853 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 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 [2022-03-20 17:47:21,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:21,853 INFO L225 Difference]: With dead ends: 58 [2022-03-20 17:47:21,853 INFO L226 Difference]: Without dead ends: 53 [2022-03-20 17:47:21,854 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=256, Invalid=7054, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 17:47:21,854 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 223 SdHoareTripleChecker+Invalid, 1973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:21,854 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 223 Invalid, 1973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-03-20 17:47:21,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-03-20 17:47:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-03-20 17:47:21,857 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) [2022-03-20 17:47:21,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2022-03-20 17:47:21,858 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2022-03-20 17:47:21,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:21,858 INFO L478 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2022-03-20 17:47:21,858 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 43 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) [2022-03-20 17:47:21,858 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2022-03-20 17:47:21,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-03-20 17:47:21,859 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:21,859 INFO L499 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:21,859 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-03-20 17:47:21,859 INFO L403 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:21,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:21,859 INFO L85 PathProgramCache]: Analyzing trace with hash 2109143310, now seen corresponding path program 20 times [2022-03-20 17:47:21,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:21,859 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1498780590] [2022-03-20 17:47:21,974 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:21,975 INFO L85 PathProgramCache]: Analyzing trace with hash -1115823352, now seen corresponding path program 1 times [2022-03-20 17:47:21,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:21,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077493006] [2022-03-20 17:47:21,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:21,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:22,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:22,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:22,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:22,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:22,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077493006] [2022-03-20 17:47:22,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077493006] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:22,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:22,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:22,919 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:22,919 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1498780590] [2022-03-20 17:47:22,919 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1498780590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:22,919 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:22,919 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-03-20 17:47:22,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834083980] [2022-03-20 17:47:22,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:22,919 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-03-20 17:47:22,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:22,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-03-20 17:47:22,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-03-20 17:47:22,920 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 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) [2022-03-20 17:47:24,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:24,395 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2022-03-20 17:47:24,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-03-20 17:47:24,396 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 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 [2022-03-20 17:47:24,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:24,396 INFO L225 Difference]: With dead ends: 60 [2022-03-20 17:47:24,396 INFO L226 Difference]: Without dead ends: 55 [2022-03-20 17:47:24,397 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=268, Invalid=7742, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 17:47:24,398 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 2067 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 2110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 2067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:24,398 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 228 Invalid, 2110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 2067 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:47:24,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-03-20 17:47:24,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-03-20 17:47:24,403 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) [2022-03-20 17:47:24,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2022-03-20 17:47:24,403 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2022-03-20 17:47:24,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:24,403 INFO L478 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2022-03-20 17:47:24,403 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 45 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) [2022-03-20 17:47:24,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2022-03-20 17:47:24,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-03-20 17:47:24,404 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:24,404 INFO L499 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:24,404 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-03-20 17:47:24,404 INFO L403 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:24,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:24,404 INFO L85 PathProgramCache]: Analyzing trace with hash 793705068, now seen corresponding path program 21 times [2022-03-20 17:47:24,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:24,405 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2024010814] [2022-03-20 17:47:24,493 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:24,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1056718008, now seen corresponding path program 1 times [2022-03-20 17:47:24,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:24,495 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637759270] [2022-03-20 17:47:24,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:24,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:24,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:24,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:24,562 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:24,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:24,562 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637759270] [2022-03-20 17:47:24,562 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637759270] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:24,562 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:24,562 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:47:25,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:25,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2024010814] [2022-03-20 17:47:25,552 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2024010814] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:25,552 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:25,552 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-03-20 17:47:25,552 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752921499] [2022-03-20 17:47:25,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:25,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-03-20 17:47:25,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:25,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-03-20 17:47:25,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-03-20 17:47:25,553 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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) [2022-03-20 17:47:27,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:27,207 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2022-03-20 17:47:27,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-03-20 17:47:27,209 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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 [2022-03-20 17:47:27,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:27,210 INFO L225 Difference]: With dead ends: 62 [2022-03-20 17:47:27,210 INFO L226 Difference]: Without dead ends: 57 [2022-03-20 17:47:27,211 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1355 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=388, Invalid=9118, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 17:47:27,211 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 2301 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 2348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:27,211 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 242 Invalid, 2348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2301 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-03-20 17:47:27,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-03-20 17:47:27,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-03-20 17:47:27,215 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) [2022-03-20 17:47:27,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2022-03-20 17:47:27,220 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2022-03-20 17:47:27,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:27,221 INFO L478 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2022-03-20 17:47:27,221 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 48 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) [2022-03-20 17:47:27,221 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2022-03-20 17:47:27,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-03-20 17:47:27,222 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:27,222 INFO L499 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:27,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-03-20 17:47:27,223 INFO L403 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:27,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:27,223 INFO L85 PathProgramCache]: Analyzing trace with hash -622060470, now seen corresponding path program 22 times [2022-03-20 17:47:27,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:27,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1564272488] [2022-03-20 17:47:27,335 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:27,335 INFO L85 PathProgramCache]: Analyzing trace with hash -997612664, now seen corresponding path program 1 times [2022-03-20 17:47:27,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:27,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368955863] [2022-03-20 17:47:27,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:27,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:27,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368955863] [2022-03-20 17:47:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368955863] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:27,400 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:27,400 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:28,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:28,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1564272488] [2022-03-20 17:47:28,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1564272488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:28,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:28,443 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-03-20 17:47:28,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759815264] [2022-03-20 17:47:28,443 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:28,443 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-03-20 17:47:28,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:28,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-03-20 17:47:28,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=2548, Unknown=0, NotChecked=0, Total=2652 [2022-03-20 17:47:28,444 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 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) [2022-03-20 17:47:30,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:30,171 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2022-03-20 17:47:30,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-03-20 17:47:30,172 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 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 [2022-03-20 17:47:30,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:30,172 INFO L225 Difference]: With dead ends: 64 [2022-03-20 17:47:30,172 INFO L226 Difference]: Without dead ends: 59 [2022-03-20 17:47:30,173 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=292, Invalid=9214, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 17:47:30,173 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 2543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:30,174 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 253 Invalid, 2543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:47:30,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-03-20 17:47:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2022-03-20 17:47:30,177 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) [2022-03-20 17:47:30,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2022-03-20 17:47:30,177 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2022-03-20 17:47:30,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:30,177 INFO L478 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2022-03-20 17:47:30,178 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 49 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) [2022-03-20 17:47:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2022-03-20 17:47:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-03-20 17:47:30,178 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:30,178 INFO L499 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:30,178 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-03-20 17:47:30,178 INFO L403 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:30,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash 331890344, now seen corresponding path program 23 times [2022-03-20 17:47:30,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:30,179 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [167902611] [2022-03-20 17:47:30,301 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:30,301 INFO L85 PathProgramCache]: Analyzing trace with hash -938507320, now seen corresponding path program 1 times [2022-03-20 17:47:30,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:30,301 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747177789] [2022-03-20 17:47:30,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:30,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:30,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:30,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:30,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:30,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:30,359 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747177789] [2022-03-20 17:47:30,359 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747177789] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:30,359 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:30,359 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:31,453 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:31,453 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [167902611] [2022-03-20 17:47:31,453 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [167902611] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:31,453 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:31,453 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-03-20 17:47:31,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588944276] [2022-03-20 17:47:31,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:31,453 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-03-20 17:47:31,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:31,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-03-20 17:47:31,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=2754, Unknown=0, NotChecked=0, Total=2862 [2022-03-20 17:47:31,454 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 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) [2022-03-20 17:47:33,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:33,211 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2022-03-20 17:47:33,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-03-20 17:47:33,212 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 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 [2022-03-20 17:47:33,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:33,212 INFO L225 Difference]: With dead ends: 66 [2022-03-20 17:47:33,212 INFO L226 Difference]: Without dead ends: 61 [2022-03-20 17:47:33,214 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1277 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=304, Invalid=9998, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 17:47:33,214 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 2649 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 2698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 2649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:33,214 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 258 Invalid, 2698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 2649 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:47:33,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2022-03-20 17:47:33,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2022-03-20 17:47:33,217 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) [2022-03-20 17:47:33,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2022-03-20 17:47:33,218 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2022-03-20 17:47:33,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:33,218 INFO L478 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2022-03-20 17:47:33,218 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 51 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) [2022-03-20 17:47:33,218 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2022-03-20 17:47:33,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-03-20 17:47:33,218 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:33,218 INFO L499 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:33,218 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-03-20 17:47:33,218 INFO L403 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:33,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:33,219 INFO L85 PathProgramCache]: Analyzing trace with hash -2044378746, now seen corresponding path program 24 times [2022-03-20 17:47:33,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:33,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1289235817] [2022-03-20 17:47:33,345 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:33,345 INFO L85 PathProgramCache]: Analyzing trace with hash -879401976, now seen corresponding path program 1 times [2022-03-20 17:47:33,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:33,345 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541380750] [2022-03-20 17:47:33,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:33,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:33,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:33,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:33,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:33,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:33,404 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541380750] [2022-03-20 17:47:33,404 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541380750] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:33,404 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:33,404 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:34,557 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:34,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1289235817] [2022-03-20 17:47:34,557 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1289235817] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:34,557 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:34,557 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-03-20 17:47:34,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912482036] [2022-03-20 17:47:34,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:34,558 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-03-20 17:47:34,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:34,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-03-20 17:47:34,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=2968, Unknown=0, NotChecked=0, Total=3080 [2022-03-20 17:47:34,559 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 55 states, 55 states have (on average 1.018181818181818) internal successors, (56), 53 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) [2022-03-20 17:47:36,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:36,489 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2022-03-20 17:47:36,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-03-20 17:47:36,490 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.018181818181818) internal successors, (56), 53 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 [2022-03-20 17:47:36,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:36,490 INFO L225 Difference]: With dead ends: 68 [2022-03-20 17:47:36,490 INFO L226 Difference]: Without dead ends: 63 [2022-03-20 17:47:36,491 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1380 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=316, Invalid=10814, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 17:47:36,491 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 2912 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 2963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 2912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:36,492 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 273 Invalid, 2963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 2912 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-03-20 17:47:36,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-03-20 17:47:36,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2022-03-20 17:47:36,495 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) [2022-03-20 17:47:36,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2022-03-20 17:47:36,495 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2022-03-20 17:47:36,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:36,495 INFO L478 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2022-03-20 17:47:36,495 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.018181818181818) internal successors, (56), 53 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) [2022-03-20 17:47:36,495 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2022-03-20 17:47:36,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-03-20 17:47:36,496 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:36,496 INFO L499 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:36,496 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-03-20 17:47:36,496 INFO L403 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:36,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:36,496 INFO L85 PathProgramCache]: Analyzing trace with hash -716372764, now seen corresponding path program 25 times [2022-03-20 17:47:36,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:36,496 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2033105952] [2022-03-20 17:47:36,582 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:36,582 INFO L85 PathProgramCache]: Analyzing trace with hash -820296632, now seen corresponding path program 1 times [2022-03-20 17:47:36,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:36,582 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860886642] [2022-03-20 17:47:36,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:36,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:36,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:36,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:36,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:36,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:36,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:36,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860886642] [2022-03-20 17:47:36,644 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860886642] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:36,644 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:36,645 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:37,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2033105952] [2022-03-20 17:47:37,986 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2033105952] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:37,986 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:37,986 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-03-20 17:47:37,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459714904] [2022-03-20 17:47:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:37,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-03-20 17:47:37,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:37,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-03-20 17:47:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=3190, Unknown=0, NotChecked=0, Total=3306 [2022-03-20 17:47:37,987 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 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) [2022-03-20 17:47:40,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:40,066 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2022-03-20 17:47:40,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-03-20 17:47:40,066 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 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 [2022-03-20 17:47:40,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:40,066 INFO L225 Difference]: With dead ends: 70 [2022-03-20 17:47:40,067 INFO L226 Difference]: Without dead ends: 65 [2022-03-20 17:47:40,067 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1487 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=328, Invalid=11662, Unknown=0, NotChecked=0, Total=11990 [2022-03-20 17:47:40,068 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 3077 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 3130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 3077 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:40,068 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 278 Invalid, 3130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 3077 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:47:40,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-03-20 17:47:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-03-20 17:47:40,071 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) [2022-03-20 17:47:40,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2022-03-20 17:47:40,071 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2022-03-20 17:47:40,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:40,071 INFO L478 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2022-03-20 17:47:40,072 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 55 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) [2022-03-20 17:47:40,072 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2022-03-20 17:47:40,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-03-20 17:47:40,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:40,072 INFO L499 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:40,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-03-20 17:47:40,072 INFO L403 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:40,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:40,072 INFO L85 PathProgramCache]: Analyzing trace with hash -107910974, now seen corresponding path program 26 times [2022-03-20 17:47:40,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:40,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1457731962] [2022-03-20 17:47:40,183 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:40,183 INFO L85 PathProgramCache]: Analyzing trace with hash -761191288, now seen corresponding path program 1 times [2022-03-20 17:47:40,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:40,184 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1414235876] [2022-03-20 17:47:40,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:40,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:40,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:40,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:40,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:40,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:40,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:40,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1414235876] [2022-03-20 17:47:40,236 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1414235876] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:40,236 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:40,237 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:41,603 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:41,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1457731962] [2022-03-20 17:47:41,603 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1457731962] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:41,603 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:41,603 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-03-20 17:47:41,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334828307] [2022-03-20 17:47:41,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:41,604 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-03-20 17:47:41,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:41,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-03-20 17:47:41,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3420, Unknown=0, NotChecked=0, Total=3540 [2022-03-20 17:47:41,604 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 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) [2022-03-20 17:47:43,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:43,786 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2022-03-20 17:47:43,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-03-20 17:47:43,787 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 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 [2022-03-20 17:47:43,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:43,787 INFO L225 Difference]: With dead ends: 72 [2022-03-20 17:47:43,787 INFO L226 Difference]: Without dead ends: 67 [2022-03-20 17:47:43,788 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=340, Invalid=12542, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 17:47:43,788 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 3303 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 3358 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 3303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:43,788 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 288 Invalid, 3358 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 3303 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-03-20 17:47:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-03-20 17:47:43,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-03-20 17:47:43,791 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) [2022-03-20 17:47:43,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2022-03-20 17:47:43,792 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2022-03-20 17:47:43,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:43,792 INFO L478 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2022-03-20 17:47:43,792 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 57 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) [2022-03-20 17:47:43,792 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2022-03-20 17:47:43,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-03-20 17:47:43,792 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:43,793 INFO L499 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:43,793 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-03-20 17:47:43,793 INFO L403 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:43,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:43,793 INFO L85 PathProgramCache]: Analyzing trace with hash 508316960, now seen corresponding path program 27 times [2022-03-20 17:47:43,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:43,793 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [160943774] [2022-03-20 17:47:43,870 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:43,870 INFO L85 PathProgramCache]: Analyzing trace with hash -702085944, now seen corresponding path program 1 times [2022-03-20 17:47:43,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:43,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234201057] [2022-03-20 17:47:43,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:43,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:43,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:43,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:43,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:43,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:43,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234201057] [2022-03-20 17:47:43,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234201057] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:43,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:43,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:45,290 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:45,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [160943774] [2022-03-20 17:47:45,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [160943774] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:45,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:45,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-03-20 17:47:45,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478058600] [2022-03-20 17:47:45,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:45,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-03-20 17:47:45,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:45,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-03-20 17:47:45,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=3540, Unknown=0, NotChecked=0, Total=3660 [2022-03-20 17:47:45,291 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 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) [2022-03-20 17:47:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:47,615 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2022-03-20 17:47:47,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-03-20 17:47:47,615 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 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 [2022-03-20 17:47:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:47,615 INFO L225 Difference]: With dead ends: 74 [2022-03-20 17:47:47,615 INFO L226 Difference]: Without dead ends: 69 [2022-03-20 17:47:47,616 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1651 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=346, Invalid=13226, Unknown=0, NotChecked=0, Total=13572 [2022-03-20 17:47:47,617 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 3537 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 3594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 3537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:47,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 298 Invalid, 3594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 3537 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-03-20 17:47:47,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2022-03-20 17:47:47,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2022-03-20 17:47:47,620 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) [2022-03-20 17:47:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2022-03-20 17:47:47,620 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2022-03-20 17:47:47,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:47,620 INFO L478 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2022-03-20 17:47:47,621 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 59 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) [2022-03-20 17:47:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2022-03-20 17:47:47,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-03-20 17:47:47,621 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:47,621 INFO L499 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:47,621 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-03-20 17:47:47,621 INFO L403 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:47,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:47,621 INFO L85 PathProgramCache]: Analyzing trace with hash -2125314, now seen corresponding path program 28 times [2022-03-20 17:47:47,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:47,622 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2067462367] [2022-03-20 17:47:47,748 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:47,748 INFO L85 PathProgramCache]: Analyzing trace with hash -642980600, now seen corresponding path program 1 times [2022-03-20 17:47:47,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:47,748 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875458517] [2022-03-20 17:47:47,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:47,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:47,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:47,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:47,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:47,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875458517] [2022-03-20 17:47:47,786 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875458517] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:47,786 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:47,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:49,292 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:49,292 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2067462367] [2022-03-20 17:47:49,292 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2067462367] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:49,292 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:49,292 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-03-20 17:47:49,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077088801] [2022-03-20 17:47:49,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:49,292 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-03-20 17:47:49,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:49,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-03-20 17:47:49,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=3782, Unknown=0, NotChecked=0, Total=3906 [2022-03-20 17:47:49,293 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 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) [2022-03-20 17:47:51,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:51,753 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2022-03-20 17:47:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-03-20 17:47:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 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 [2022-03-20 17:47:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:51,754 INFO L225 Difference]: With dead ends: 76 [2022-03-20 17:47:51,754 INFO L226 Difference]: Without dead ends: 71 [2022-03-20 17:47:51,755 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1768 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=358, Invalid=14162, Unknown=0, NotChecked=0, Total=14520 [2022-03-20 17:47:51,756 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 302 mSDsCounter, 0 mSdLazyCounter, 3840 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 313 SdHoareTripleChecker+Invalid, 3899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 3840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:51,756 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 313 Invalid, 3899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 3840 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 17:47:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-03-20 17:47:51,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2022-03-20 17:47:51,759 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) [2022-03-20 17:47:51,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2022-03-20 17:47:51,759 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2022-03-20 17:47:51,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:51,759 INFO L478 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2022-03-20 17:47:51,759 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 61 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) [2022-03-20 17:47:51,760 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2022-03-20 17:47:51,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-03-20 17:47:51,760 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:51,760 INFO L499 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:51,760 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-03-20 17:47:51,760 INFO L403 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:51,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:51,760 INFO L85 PathProgramCache]: Analyzing trace with hash -910878884, now seen corresponding path program 29 times [2022-03-20 17:47:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:51,761 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1568395526] [2022-03-20 17:47:51,880 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:51,880 INFO L85 PathProgramCache]: Analyzing trace with hash -583875256, now seen corresponding path program 1 times [2022-03-20 17:47:51,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:51,880 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342272372] [2022-03-20 17:47:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:51,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:51,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:51,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:51,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342272372] [2022-03-20 17:47:51,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342272372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:51,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:51,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:47:53,542 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:53,543 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1568395526] [2022-03-20 17:47:53,543 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1568395526] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:53,543 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:53,543 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-03-20 17:47:53,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032225717] [2022-03-20 17:47:53,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:53,543 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-03-20 17:47:53,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:53,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-03-20 17:47:53,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4158, Unknown=0, NotChecked=0, Total=4290 [2022-03-20 17:47:53,544 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 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) [2022-03-20 17:47:56,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:47:56,218 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2022-03-20 17:47:56,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-03-20 17:47:56,219 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 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 [2022-03-20 17:47:56,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:47:56,219 INFO L225 Difference]: With dead ends: 78 [2022-03-20 17:47:56,219 INFO L226 Difference]: Without dead ends: 73 [2022-03-20 17:47:56,221 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=376, Invalid=15374, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 17:47:56,221 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 4029 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 318 SdHoareTripleChecker+Invalid, 4090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 4029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:47:56,221 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 318 Invalid, 4090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 4029 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-03-20 17:47:56,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-03-20 17:47:56,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-03-20 17:47:56,224 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) [2022-03-20 17:47:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2022-03-20 17:47:56,225 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2022-03-20 17:47:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:47:56,225 INFO L478 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2022-03-20 17:47:56,225 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 63 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) [2022-03-20 17:47:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2022-03-20 17:47:56,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-03-20 17:47:56,225 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:47:56,225 INFO L499 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:47:56,225 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-03-20 17:47:56,226 INFO L403 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:47:56,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:47:56,226 INFO L85 PathProgramCache]: Analyzing trace with hash 1950268730, now seen corresponding path program 30 times [2022-03-20 17:47:56,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:56,227 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [846419087] [2022-03-20 17:47:56,307 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:47:56,307 INFO L85 PathProgramCache]: Analyzing trace with hash -524769912, now seen corresponding path program 1 times [2022-03-20 17:47:56,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:47:56,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240268303] [2022-03-20 17:47:56,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:47:56,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:47:56,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:56,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:47:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:47:56,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:47:56,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:47:56,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240268303] [2022-03-20 17:47:56,342 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240268303] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:56,342 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:56,342 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:47:58,059 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:47:58,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [846419087] [2022-03-20 17:47:58,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [846419087] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:47:58,059 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:47:58,059 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-03-20 17:47:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252522773] [2022-03-20 17:47:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:47:58,060 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-03-20 17:47:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:47:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-03-20 17:47:58,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=4290, Unknown=0, NotChecked=0, Total=4422 [2022-03-20 17:47:58,061 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 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) [2022-03-20 17:48:00,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:00,966 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2022-03-20 17:48:00,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-03-20 17:48:00,967 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 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 [2022-03-20 17:48:00,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:00,967 INFO L225 Difference]: With dead ends: 80 [2022-03-20 17:48:00,967 INFO L226 Difference]: Without dead ends: 75 [2022-03-20 17:48:00,968 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2014 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=382, Invalid=16130, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 17:48:00,968 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 322 mSDsCounter, 0 mSdLazyCounter, 4352 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 4415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 4352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:00,969 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 333 Invalid, 4415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 4352 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-03-20 17:48:00,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-03-20 17:48:00,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-03-20 17:48:00,972 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) [2022-03-20 17:48:00,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2022-03-20 17:48:00,973 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2022-03-20 17:48:00,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:00,973 INFO L478 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2022-03-20 17:48:00,973 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 65 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) [2022-03-20 17:48:00,973 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2022-03-20 17:48:00,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-03-20 17:48:00,973 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:00,973 INFO L499 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:00,974 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-03-20 17:48:00,974 INFO L403 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:00,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:00,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1560910952, now seen corresponding path program 31 times [2022-03-20 17:48:00,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:00,974 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1476102265] [2022-03-20 17:48:01,101 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:01,101 INFO L85 PathProgramCache]: Analyzing trace with hash -465664568, now seen corresponding path program 1 times [2022-03-20 17:48:01,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:01,101 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1683124363] [2022-03-20 17:48:01,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:01,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:01,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:01,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:01,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:01,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:01,136 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1683124363] [2022-03-20 17:48:01,136 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1683124363] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:01,136 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:01,136 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:48:02,978 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:02,979 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1476102265] [2022-03-20 17:48:02,979 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1476102265] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:02,979 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:02,979 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-03-20 17:48:02,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132983696] [2022-03-20 17:48:02,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:02,979 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-03-20 17:48:02,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:02,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-03-20 17:48:02,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=4556, Unknown=0, NotChecked=0, Total=4692 [2022-03-20 17:48:02,980 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 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) [2022-03-20 17:48:06,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:06,049 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2022-03-20 17:48:06,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-03-20 17:48:06,049 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 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 [2022-03-20 17:48:06,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:06,050 INFO L225 Difference]: With dead ends: 82 [2022-03-20 17:48:06,050 INFO L226 Difference]: Without dead ends: 77 [2022-03-20 17:48:06,051 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=394, Invalid=17162, Unknown=0, NotChecked=0, Total=17556 [2022-03-20 17:48:06,051 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 4553 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 338 SdHoareTripleChecker+Invalid, 4618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 4553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:06,052 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 338 Invalid, 4618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 4553 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-03-20 17:48:06,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-03-20 17:48:06,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-03-20 17:48:06,055 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) [2022-03-20 17:48:06,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2022-03-20 17:48:06,056 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2022-03-20 17:48:06,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:06,056 INFO L478 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2022-03-20 17:48:06,056 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 67 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) [2022-03-20 17:48:06,056 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2022-03-20 17:48:06,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-03-20 17:48:06,056 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:06,056 INFO L499 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:06,056 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-03-20 17:48:06,057 INFO L403 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:06,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash 39709302, now seen corresponding path program 32 times [2022-03-20 17:48:06,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:06,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1298185481] [2022-03-20 17:48:06,140 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:06,140 INFO L85 PathProgramCache]: Analyzing trace with hash -406559224, now seen corresponding path program 1 times [2022-03-20 17:48:06,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:06,140 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129208931] [2022-03-20 17:48:06,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:06,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:06,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:06,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:06,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:06,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:06,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129208931] [2022-03-20 17:48:06,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129208931] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:06,184 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:06,184 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:48:08,143 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:08,143 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1298185481] [2022-03-20 17:48:08,143 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1298185481] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:08,143 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:08,143 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-03-20 17:48:08,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090827738] [2022-03-20 17:48:08,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:08,144 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-03-20 17:48:08,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:08,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-03-20 17:48:08,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=4830, Unknown=0, NotChecked=0, Total=4970 [2022-03-20 17:48:08,145 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 71 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 69 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) [2022-03-20 17:48:11,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:11,449 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2022-03-20 17:48:11,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-03-20 17:48:11,449 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 69 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 [2022-03-20 17:48:11,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:11,449 INFO L225 Difference]: With dead ends: 84 [2022-03-20 17:48:11,450 INFO L226 Difference]: Without dead ends: 79 [2022-03-20 17:48:11,451 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2276 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=406, Invalid=18226, Unknown=0, NotChecked=0, Total=18632 [2022-03-20 17:48:11,451 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 4827 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 4894 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 4827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:11,451 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 348 Invalid, 4894 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 4827 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-03-20 17:48:11,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-03-20 17:48:11,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-03-20 17:48:11,455 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) [2022-03-20 17:48:11,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2022-03-20 17:48:11,455 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2022-03-20 17:48:11,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:11,455 INFO L478 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2022-03-20 17:48:11,456 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 69 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) [2022-03-20 17:48:11,456 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2022-03-20 17:48:11,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-03-20 17:48:11,456 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:11,456 INFO L499 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:11,456 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-03-20 17:48:11,456 INFO L403 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:11,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:11,456 INFO L85 PathProgramCache]: Analyzing trace with hash 637481428, now seen corresponding path program 33 times [2022-03-20 17:48:11,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:11,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1211838807] [2022-03-20 17:48:11,570 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:11,571 INFO L85 PathProgramCache]: Analyzing trace with hash -347453880, now seen corresponding path program 1 times [2022-03-20 17:48:11,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:11,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424187081] [2022-03-20 17:48:11,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:11,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:11,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:11,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:11,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:11,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:11,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:11,605 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424187081] [2022-03-20 17:48:11,605 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424187081] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:11,605 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:11,605 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:48:13,748 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:13,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1211838807] [2022-03-20 17:48:13,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1211838807] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:13,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:13,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-03-20 17:48:13,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784203524] [2022-03-20 17:48:13,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:13,749 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-03-20 17:48:13,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:13,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-03-20 17:48:13,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=144, Invalid=5112, Unknown=0, NotChecked=0, Total=5256 [2022-03-20 17:48:13,749 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 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) [2022-03-20 17:48:17,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:17,472 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2022-03-20 17:48:17,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-03-20 17:48:17,472 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 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 [2022-03-20 17:48:17,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:17,473 INFO L225 Difference]: With dead ends: 86 [2022-03-20 17:48:17,473 INFO L226 Difference]: Without dead ends: 81 [2022-03-20 17:48:17,474 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2413 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=418, Invalid=19322, Unknown=0, NotChecked=0, Total=19740 [2022-03-20 17:48:17,474 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 352 mSDsCounter, 0 mSdLazyCounter, 5180 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 5249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 5180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:17,474 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 363 Invalid, 5249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 5180 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 17:48:17,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-03-20 17:48:17,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2022-03-20 17:48:17,478 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) [2022-03-20 17:48:17,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2022-03-20 17:48:17,479 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2022-03-20 17:48:17,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:17,479 INFO L478 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2022-03-20 17:48:17,479 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 71 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) [2022-03-20 17:48:17,479 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2022-03-20 17:48:17,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-03-20 17:48:17,479 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:17,479 INFO L499 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:17,479 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-03-20 17:48:17,480 INFO L403 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:17,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:17,480 INFO L85 PathProgramCache]: Analyzing trace with hash -429123150, now seen corresponding path program 34 times [2022-03-20 17:48:17,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:17,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [884184101] [2022-03-20 17:48:17,605 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:17,605 INFO L85 PathProgramCache]: Analyzing trace with hash -288348536, now seen corresponding path program 1 times [2022-03-20 17:48:17,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:17,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366480479] [2022-03-20 17:48:17,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:17,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:17,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:17,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:17,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:17,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366480479] [2022-03-20 17:48:17,680 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366480479] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:17,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:17,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:19,894 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:19,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [884184101] [2022-03-20 17:48:19,894 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [884184101] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:19,894 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:19,894 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-03-20 17:48:19,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896900186] [2022-03-20 17:48:19,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:19,894 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-03-20 17:48:19,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:19,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-03-20 17:48:19,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5548, Unknown=0, NotChecked=0, Total=5700 [2022-03-20 17:48:19,895 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 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) [2022-03-20 17:48:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:23,559 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2022-03-20 17:48:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-03-20 17:48:23,559 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 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 [2022-03-20 17:48:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:23,560 INFO L225 Difference]: With dead ends: 88 [2022-03-20 17:48:23,560 INFO L226 Difference]: Without dead ends: 83 [2022-03-20 17:48:23,561 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2630 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=436, Invalid=20734, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 17:48:23,562 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 5472 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 5543 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 5472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:23,562 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 373 Invalid, 5543 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 5472 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-03-20 17:48:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-03-20 17:48:23,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2022-03-20 17:48:23,567 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) [2022-03-20 17:48:23,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2022-03-20 17:48:23,567 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2022-03-20 17:48:23,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:23,568 INFO L478 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2022-03-20 17:48:23,568 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 73 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) [2022-03-20 17:48:23,568 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2022-03-20 17:48:23,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-03-20 17:48:23,568 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:23,568 INFO L499 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:23,568 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-03-20 17:48:23,569 INFO L403 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:23,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1061061136, now seen corresponding path program 35 times [2022-03-20 17:48:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:23,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [504043971] [2022-03-20 17:48:23,668 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:23,668 INFO L85 PathProgramCache]: Analyzing trace with hash -229243192, now seen corresponding path program 1 times [2022-03-20 17:48:23,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:23,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335832325] [2022-03-20 17:48:23,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:23,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:23,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:23,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:23,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:23,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335832325] [2022-03-20 17:48:23,717 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335832325] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:23,717 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:23,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:48:25,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:25,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [504043971] [2022-03-20 17:48:25,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [504043971] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:25,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:25,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-03-20 17:48:25,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911103104] [2022-03-20 17:48:25,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:25,986 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-03-20 17:48:25,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:25,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-03-20 17:48:25,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=5700, Unknown=0, NotChecked=0, Total=5852 [2022-03-20 17:48:25,987 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 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) [2022-03-20 17:48:29,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:29,778 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2022-03-20 17:48:29,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-03-20 17:48:29,779 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 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 [2022-03-20 17:48:29,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:29,779 INFO L225 Difference]: With dead ends: 90 [2022-03-20 17:48:29,779 INFO L226 Difference]: Without dead ends: 85 [2022-03-20 17:48:29,780 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=442, Invalid=21610, Unknown=0, NotChecked=0, Total=22052 [2022-03-20 17:48:29,781 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 5772 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 383 SdHoareTripleChecker+Invalid, 5845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 5772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:29,781 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 383 Invalid, 5845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 5772 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-03-20 17:48:29,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-03-20 17:48:29,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-03-20 17:48:29,785 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) [2022-03-20 17:48:29,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2022-03-20 17:48:29,785 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2022-03-20 17:48:29,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:29,785 INFO L478 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2022-03-20 17:48:29,785 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 75 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) [2022-03-20 17:48:29,785 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2022-03-20 17:48:29,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-03-20 17:48:29,786 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:29,786 INFO L499 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:29,786 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-03-20 17:48:29,786 INFO L403 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:29,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:29,786 INFO L85 PathProgramCache]: Analyzing trace with hash -1390916882, now seen corresponding path program 36 times [2022-03-20 17:48:29,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:29,786 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1107332400] [2022-03-20 17:48:29,870 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:29,870 INFO L85 PathProgramCache]: Analyzing trace with hash -170137848, now seen corresponding path program 1 times [2022-03-20 17:48:29,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:29,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502837595] [2022-03-20 17:48:29,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:29,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:29,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:29,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:29,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:29,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:29,932 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502837595] [2022-03-20 17:48:29,932 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502837595] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:29,932 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:29,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:32,397 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:32,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1107332400] [2022-03-20 17:48:32,398 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1107332400] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:32,398 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:32,398 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-03-20 17:48:32,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275576128] [2022-03-20 17:48:32,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:32,398 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-03-20 17:48:32,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:32,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-03-20 17:48:32,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=6160, Unknown=0, NotChecked=0, Total=6320 [2022-03-20 17:48:32,399 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 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) [2022-03-20 17:48:36,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:36,539 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2022-03-20 17:48:36,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-03-20 17:48:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 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 [2022-03-20 17:48:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:36,540 INFO L225 Difference]: With dead ends: 92 [2022-03-20 17:48:36,540 INFO L226 Difference]: Without dead ends: 87 [2022-03-20 17:48:36,541 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2928 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=460, Invalid=23102, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 17:48:36,541 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 6080 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 6155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 6080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:36,541 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 393 Invalid, 6155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 6080 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-03-20 17:48:36,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-03-20 17:48:36,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-03-20 17:48:36,545 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) [2022-03-20 17:48:36,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2022-03-20 17:48:36,546 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2022-03-20 17:48:36,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:36,546 INFO L478 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2022-03-20 17:48:36,546 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 77 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) [2022-03-20 17:48:36,546 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2022-03-20 17:48:36,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-03-20 17:48:36,547 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:36,547 INFO L499 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:36,547 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-03-20 17:48:36,547 INFO L403 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:36,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:36,547 INFO L85 PathProgramCache]: Analyzing trace with hash 195253324, now seen corresponding path program 37 times [2022-03-20 17:48:36,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:36,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [912303688] [2022-03-20 17:48:36,667 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:36,667 INFO L85 PathProgramCache]: Analyzing trace with hash -111032504, now seen corresponding path program 1 times [2022-03-20 17:48:36,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:36,668 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742424531] [2022-03-20 17:48:36,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:36,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:36,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:36,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:36,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:36,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:36,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:36,718 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742424531] [2022-03-20 17:48:36,718 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742424531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:36,718 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:36,718 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:39,323 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:39,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [912303688] [2022-03-20 17:48:39,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [912303688] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:39,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:39,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-03-20 17:48:39,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936119298] [2022-03-20 17:48:39,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:39,324 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-03-20 17:48:39,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:39,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-03-20 17:48:39,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=6478, Unknown=0, NotChecked=0, Total=6642 [2022-03-20 17:48:39,325 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 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) [2022-03-20 17:48:43,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:43,709 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2022-03-20 17:48:43,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-03-20 17:48:43,710 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 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 [2022-03-20 17:48:43,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:43,710 INFO L225 Difference]: With dead ends: 94 [2022-03-20 17:48:43,710 INFO L226 Difference]: Without dead ends: 89 [2022-03-20 17:48:43,712 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3083 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=472, Invalid=24334, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 17:48:43,713 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 6473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:43,713 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 403 Invalid, 6473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:48:43,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-03-20 17:48:43,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2022-03-20 17:48:43,726 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) [2022-03-20 17:48:43,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2022-03-20 17:48:43,727 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2022-03-20 17:48:43,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:43,727 INFO L478 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2022-03-20 17:48:43,727 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 79 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) [2022-03-20 17:48:43,727 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2022-03-20 17:48:43,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-03-20 17:48:43,728 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:43,728 INFO L499 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:43,728 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-03-20 17:48:43,728 INFO L403 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:43,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:43,728 INFO L85 PathProgramCache]: Analyzing trace with hash -208568790, now seen corresponding path program 38 times [2022-03-20 17:48:43,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:43,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [655564137] [2022-03-20 17:48:43,812 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:43,813 INFO L85 PathProgramCache]: Analyzing trace with hash -51927160, now seen corresponding path program 1 times [2022-03-20 17:48:43,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:43,813 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527008965] [2022-03-20 17:48:43,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:43,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:43,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:43,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:43,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:43,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:43,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527008965] [2022-03-20 17:48:43,872 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527008965] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:43,872 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:43,872 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:46,576 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:46,576 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [655564137] [2022-03-20 17:48:46,576 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [655564137] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:46,576 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:46,576 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-03-20 17:48:46,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744044811] [2022-03-20 17:48:46,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:46,577 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-03-20 17:48:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:46,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-03-20 17:48:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=6804, Unknown=0, NotChecked=0, Total=6972 [2022-03-20 17:48:46,578 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 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) [2022-03-20 17:48:51,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:51,094 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2022-03-20 17:48:51,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-03-20 17:48:51,095 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 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 [2022-03-20 17:48:51,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:51,095 INFO L225 Difference]: With dead ends: 96 [2022-03-20 17:48:51,095 INFO L226 Difference]: Without dead ends: 91 [2022-03-20 17:48:51,097 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3242 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=484, Invalid=25598, Unknown=0, NotChecked=0, Total=26082 [2022-03-20 17:48:51,097 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 397 mSDsCounter, 0 mSdLazyCounter, 6639 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 408 SdHoareTripleChecker+Invalid, 6718 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 6639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:51,097 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 408 Invalid, 6718 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 6639 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-03-20 17:48:51,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-03-20 17:48:51,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-03-20 17:48:51,101 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) [2022-03-20 17:48:51,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2022-03-20 17:48:51,102 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2022-03-20 17:48:51,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:51,102 INFO L478 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2022-03-20 17:48:51,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 81 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) [2022-03-20 17:48:51,102 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2022-03-20 17:48:51,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-03-20 17:48:51,103 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:51,103 INFO L499 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:51,103 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-03-20 17:48:51,103 INFO L403 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:51,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:51,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1734563704, now seen corresponding path program 39 times [2022-03-20 17:48:51,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:51,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [744303835] [2022-03-20 17:48:51,232 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:51,232 INFO L85 PathProgramCache]: Analyzing trace with hash 7178184, now seen corresponding path program 1 times [2022-03-20 17:48:51,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:51,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530388722] [2022-03-20 17:48:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:51,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:51,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:51,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:51,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:51,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:51,285 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530388722] [2022-03-20 17:48:51,285 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530388722] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:51,285 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:51,285 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:48:54,203 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:48:54,203 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [744303835] [2022-03-20 17:48:54,203 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [744303835] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:54,203 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:54,203 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-03-20 17:48:54,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838486084] [2022-03-20 17:48:54,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:48:54,204 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-03-20 17:48:54,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:54,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-03-20 17:48:54,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=7138, Unknown=0, NotChecked=0, Total=7310 [2022-03-20 17:48:54,205 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 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) [2022-03-20 17:48:58,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:48:58,983 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2022-03-20 17:48:58,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-03-20 17:48:58,983 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 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 [2022-03-20 17:48:58,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:48:58,984 INFO L225 Difference]: With dead ends: 98 [2022-03-20 17:48:58,984 INFO L226 Difference]: Without dead ends: 93 [2022-03-20 17:48:58,985 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3405 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=496, Invalid=26894, Unknown=0, NotChecked=0, Total=27390 [2022-03-20 17:48:58,985 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 6969 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 7050 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 6969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:48:58,986 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 418 Invalid, 7050 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 6969 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-03-20 17:48:58,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-03-20 17:48:58,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2022-03-20 17:48:58,990 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) [2022-03-20 17:48:58,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2022-03-20 17:48:58,990 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2022-03-20 17:48:58,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:48:58,991 INFO L478 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2022-03-20 17:48:58,991 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.011764705882353) internal successors, (86), 83 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) [2022-03-20 17:48:58,991 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2022-03-20 17:48:58,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-03-20 17:48:58,991 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:48:58,991 INFO L499 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:48:58,991 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-03-20 17:48:58,991 INFO L403 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:48:58,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:48:58,992 INFO L85 PathProgramCache]: Analyzing trace with hash 663139174, now seen corresponding path program 40 times [2022-03-20 17:48:58,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:48:58,992 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1783665372] [2022-03-20 17:48:59,081 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:48:59,081 INFO L85 PathProgramCache]: Analyzing trace with hash 66283528, now seen corresponding path program 1 times [2022-03-20 17:48:59,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:48:59,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461837179] [2022-03-20 17:48:59,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:48:59,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:48:59,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:59,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:48:59,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:48:59,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:48:59,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:48:59,130 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461837179] [2022-03-20 17:48:59,130 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461837179] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:48:59,130 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:48:59,130 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:02,129 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:02,129 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1783665372] [2022-03-20 17:49:02,129 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1783665372] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:02,129 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:02,129 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-03-20 17:49:02,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560273570] [2022-03-20 17:49:02,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:02,129 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-03-20 17:49:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-03-20 17:49:02,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=7480, Unknown=0, NotChecked=0, Total=7656 [2022-03-20 17:49:02,131 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 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) [2022-03-20 17:49:07,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:07,133 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2022-03-20 17:49:07,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-03-20 17:49:07,134 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 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 [2022-03-20 17:49:07,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:07,134 INFO L225 Difference]: With dead ends: 100 [2022-03-20 17:49:07,134 INFO L226 Difference]: Without dead ends: 95 [2022-03-20 17:49:07,135 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3572 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=508, Invalid=28222, Unknown=0, NotChecked=0, Total=28730 [2022-03-20 17:49:07,136 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 7307 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 428 SdHoareTripleChecker+Invalid, 7390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 7307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:07,136 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 428 Invalid, 7390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 7307 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 17:49:07,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-03-20 17:49:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-03-20 17:49:07,140 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) [2022-03-20 17:49:07,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2022-03-20 17:49:07,141 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2022-03-20 17:49:07,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:07,141 INFO L478 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2022-03-20 17:49:07,141 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 85 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) [2022-03-20 17:49:07,141 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2022-03-20 17:49:07,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-03-20 17:49:07,141 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:07,142 INFO L499 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:07,142 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-03-20 17:49:07,142 INFO L403 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:07,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:07,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1541833020, now seen corresponding path program 41 times [2022-03-20 17:49:07,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:07,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [322055311] [2022-03-20 17:49:07,239 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 125388872, now seen corresponding path program 1 times [2022-03-20 17:49:07,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:07,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780564465] [2022-03-20 17:49:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:07,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:07,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:07,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:07,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:07,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:07,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:07,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780564465] [2022-03-20 17:49:07,296 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [780564465] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:07,296 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:07,296 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:10,476 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:10,476 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [322055311] [2022-03-20 17:49:10,477 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [322055311] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:10,477 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:10,477 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-03-20 17:49:10,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139023876] [2022-03-20 17:49:10,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:10,477 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-03-20 17:49:10,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:10,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-03-20 17:49:10,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=7830, Unknown=0, NotChecked=0, Total=8010 [2022-03-20 17:49:10,479 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 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) [2022-03-20 17:49:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:15,588 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2022-03-20 17:49:15,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-03-20 17:49:15,589 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 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 [2022-03-20 17:49:15,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:15,589 INFO L225 Difference]: With dead ends: 102 [2022-03-20 17:49:15,589 INFO L226 Difference]: Without dead ends: 97 [2022-03-20 17:49:15,591 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3743 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=520, Invalid=29582, Unknown=0, NotChecked=0, Total=30102 [2022-03-20 17:49:15,591 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 7653 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 438 SdHoareTripleChecker+Invalid, 7738 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 7653 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:15,591 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 438 Invalid, 7738 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 7653 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-03-20 17:49:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-03-20 17:49:15,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-03-20 17:49:15,602 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) [2022-03-20 17:49:15,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2022-03-20 17:49:15,603 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2022-03-20 17:49:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:15,603 INFO L478 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2022-03-20 17:49:15,603 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 87 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) [2022-03-20 17:49:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2022-03-20 17:49:15,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-03-20 17:49:15,604 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:15,604 INFO L499 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:15,604 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-03-20 17:49:15,604 INFO L403 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:15,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:15,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1193732770, now seen corresponding path program 42 times [2022-03-20 17:49:15,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:15,604 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [425635499] [2022-03-20 17:49:15,728 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:15,729 INFO L85 PathProgramCache]: Analyzing trace with hash 184494216, now seen corresponding path program 1 times [2022-03-20 17:49:15,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:15,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6571639] [2022-03-20 17:49:15,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:15,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:15,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:15,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:15,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:15,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6571639] [2022-03-20 17:49:15,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6571639] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:15,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:15,769 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:49:18,903 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:18,904 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [425635499] [2022-03-20 17:49:18,904 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [425635499] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:18,904 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:18,904 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-03-20 17:49:18,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691404997] [2022-03-20 17:49:18,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:18,904 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-03-20 17:49:18,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:18,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-03-20 17:49:18,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=8010, Unknown=0, NotChecked=0, Total=8190 [2022-03-20 17:49:18,905 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 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) [2022-03-20 17:49:24,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:24,207 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2022-03-20 17:49:24,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-03-20 17:49:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 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 [2022-03-20 17:49:24,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:24,208 INFO L225 Difference]: With dead ends: 104 [2022-03-20 17:49:24,208 INFO L226 Difference]: Without dead ends: 99 [2022-03-20 17:49:24,210 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3826 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=526, Invalid=30626, Unknown=0, NotChecked=0, Total=31152 [2022-03-20 17:49:24,217 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 8007 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 448 SdHoareTripleChecker+Invalid, 8094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 8007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:24,217 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 448 Invalid, 8094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 8007 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 17:49:24,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2022-03-20 17:49:24,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2022-03-20 17:49:24,221 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) [2022-03-20 17:49:24,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2022-03-20 17:49:24,222 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2022-03-20 17:49:24,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:24,222 INFO L478 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2022-03-20 17:49:24,222 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.010989010989011) internal successors, (92), 89 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) [2022-03-20 17:49:24,222 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2022-03-20 17:49:24,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-03-20 17:49:24,223 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:24,223 INFO L499 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:24,223 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-03-20 17:49:24,223 INFO L403 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:24,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:24,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1552471808, now seen corresponding path program 43 times [2022-03-20 17:49:24,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:24,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1925086370] [2022-03-20 17:49:24,309 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:24,309 INFO L85 PathProgramCache]: Analyzing trace with hash 243599560, now seen corresponding path program 1 times [2022-03-20 17:49:24,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:24,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561052673] [2022-03-20 17:49:24,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:24,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:24,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:24,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:24,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:24,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:24,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:24,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561052673] [2022-03-20 17:49:24,365 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561052673] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:24,365 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:24,365 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:27,671 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:27,671 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1925086370] [2022-03-20 17:49:27,671 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1925086370] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:27,671 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:27,671 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-03-20 17:49:27,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393429965] [2022-03-20 17:49:27,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:27,672 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-03-20 17:49:27,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:27,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-03-20 17:49:27,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=8554, Unknown=0, NotChecked=0, Total=8742 [2022-03-20 17:49:27,673 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 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) [2022-03-20 17:49:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:33,063 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2022-03-20 17:49:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-03-20 17:49:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 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 [2022-03-20 17:49:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:33,064 INFO L225 Difference]: With dead ends: 106 [2022-03-20 17:49:33,064 INFO L226 Difference]: Without dead ends: 101 [2022-03-20 17:49:33,066 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 187 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=544, Invalid=32398, Unknown=0, NotChecked=0, Total=32942 [2022-03-20 17:49:33,066 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 8369 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 458 SdHoareTripleChecker+Invalid, 8458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 8369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:33,066 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 458 Invalid, 8458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 8369 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-03-20 17:49:33,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-03-20 17:49:33,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2022-03-20 17:49:33,071 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) [2022-03-20 17:49:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2022-03-20 17:49:33,071 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2022-03-20 17:49:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:33,071 INFO L478 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2022-03-20 17:49:33,071 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.010752688172043) internal successors, (94), 91 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) [2022-03-20 17:49:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2022-03-20 17:49:33,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-03-20 17:49:33,072 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:33,072 INFO L499 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:33,072 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-03-20 17:49:33,072 INFO L403 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:33,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:33,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1591663650, now seen corresponding path program 44 times [2022-03-20 17:49:33,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:33,072 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [901248025] [2022-03-20 17:49:33,193 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:33,193 INFO L85 PathProgramCache]: Analyzing trace with hash 302704904, now seen corresponding path program 1 times [2022-03-20 17:49:33,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:33,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022094088] [2022-03-20 17:49:33,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:33,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:33,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:33,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:33,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:33,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:33,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:33,262 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022094088] [2022-03-20 17:49:33,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022094088] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:33,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:33,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:36,790 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:36,790 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [901248025] [2022-03-20 17:49:36,790 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [901248025] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:36,790 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:36,790 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-03-20 17:49:36,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408600377] [2022-03-20 17:49:36,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:36,791 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-03-20 17:49:36,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:36,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-03-20 17:49:36,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=8928, Unknown=0, NotChecked=0, Total=9120 [2022-03-20 17:49:36,792 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 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) [2022-03-20 17:49:42,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:42,819 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2022-03-20 17:49:42,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-03-20 17:49:42,820 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 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 [2022-03-20 17:49:42,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:42,820 INFO L225 Difference]: With dead ends: 108 [2022-03-20 17:49:42,820 INFO L226 Difference]: Without dead ends: 103 [2022-03-20 17:49:42,821 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4280 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=556, Invalid=33854, Unknown=0, NotChecked=0, Total=34410 [2022-03-20 17:49:42,822 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 8739 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 468 SdHoareTripleChecker+Invalid, 8830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 8739 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:42,822 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 468 Invalid, 8830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 8739 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:49:42,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-03-20 17:49:42,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2022-03-20 17:49:42,826 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) [2022-03-20 17:49:42,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2022-03-20 17:49:42,827 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2022-03-20 17:49:42,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:42,827 INFO L478 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2022-03-20 17:49:42,827 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 93 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) [2022-03-20 17:49:42,827 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2022-03-20 17:49:42,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-03-20 17:49:42,827 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:42,827 INFO L499 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:42,828 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-03-20 17:49:42,828 INFO L403 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:42,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:42,828 INFO L85 PathProgramCache]: Analyzing trace with hash 551137596, now seen corresponding path program 45 times [2022-03-20 17:49:42,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:42,828 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1809116156] [2022-03-20 17:49:42,910 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:42,910 INFO L85 PathProgramCache]: Analyzing trace with hash 361810248, now seen corresponding path program 1 times [2022-03-20 17:49:42,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:42,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728827238] [2022-03-20 17:49:42,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:42,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:42,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:42,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:42,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:42,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:42,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:42,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728827238] [2022-03-20 17:49:42,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728827238] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:42,961 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:42,961 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:46,549 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:46,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1809116156] [2022-03-20 17:49:46,549 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1809116156] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:46,549 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:46,549 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-03-20 17:49:46,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409264538] [2022-03-20 17:49:46,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:46,550 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-03-20 17:49:46,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:46,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-03-20 17:49:46,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=9310, Unknown=0, NotChecked=0, Total=9506 [2022-03-20 17:49:46,550 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 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) [2022-03-20 17:49:52,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:49:52,440 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2022-03-20 17:49:52,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-03-20 17:49:52,441 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 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 [2022-03-20 17:49:52,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:49:52,441 INFO L225 Difference]: With dead ends: 110 [2022-03-20 17:49:52,441 INFO L226 Difference]: Without dead ends: 105 [2022-03-20 17:49:52,442 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 188 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4467 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=568, Invalid=35342, Unknown=0, NotChecked=0, Total=35910 [2022-03-20 17:49:52,443 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 472 mSDsCounter, 0 mSdLazyCounter, 9212 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 9305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 9212 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:49:52,443 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 483 Invalid, 9305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 9212 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-03-20 17:49:52,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-03-20 17:49:52,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-03-20 17:49:52,447 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) [2022-03-20 17:49:52,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2022-03-20 17:49:52,448 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2022-03-20 17:49:52,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:49:52,448 INFO L478 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2022-03-20 17:49:52,448 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 95 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) [2022-03-20 17:49:52,448 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2022-03-20 17:49:52,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-03-20 17:49:52,448 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:49:52,448 INFO L499 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:49:52,449 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-03-20 17:49:52,449 INFO L403 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:49:52,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:49:52,449 INFO L85 PathProgramCache]: Analyzing trace with hash -1801167078, now seen corresponding path program 46 times [2022-03-20 17:49:52,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:52,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1046675521] [2022-03-20 17:49:52,538 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:49:52,539 INFO L85 PathProgramCache]: Analyzing trace with hash 420915592, now seen corresponding path program 1 times [2022-03-20 17:49:52,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:49:52,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1730228706] [2022-03-20 17:49:52,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:49:52,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:49:52,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:52,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:49:52,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:49:52,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:49:52,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:49:52,599 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1730228706] [2022-03-20 17:49:52,599 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1730228706] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:52,599 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:52,599 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:49:56,405 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:49:56,406 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1046675521] [2022-03-20 17:49:56,406 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1046675521] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:49:56,406 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:49:56,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-03-20 17:49:56,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477115224] [2022-03-20 17:49:56,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:49:56,406 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-03-20 17:49:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:49:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-03-20 17:49:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=9700, Unknown=0, NotChecked=0, Total=9900 [2022-03-20 17:49:56,407 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 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) [2022-03-20 17:50:02,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:02,596 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2022-03-20 17:50:02,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-03-20 17:50:02,597 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 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 [2022-03-20 17:50:02,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:02,597 INFO L225 Difference]: With dead ends: 112 [2022-03-20 17:50:02,598 INFO L226 Difference]: Without dead ends: 107 [2022-03-20 17:50:02,599 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4658 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=580, Invalid=36862, Unknown=0, NotChecked=0, Total=37442 [2022-03-20 17:50:02,599 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 9600 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 9695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 9600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:02,599 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 493 Invalid, 9695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 9600 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-03-20 17:50:02,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-03-20 17:50:02,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2022-03-20 17:50:02,604 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) [2022-03-20 17:50:02,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2022-03-20 17:50:02,604 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2022-03-20 17:50:02,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:02,604 INFO L478 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2022-03-20 17:50:02,604 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 97 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) [2022-03-20 17:50:02,605 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2022-03-20 17:50:02,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-03-20 17:50:02,605 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:02,605 INFO L499 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:02,605 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-03-20 17:50:02,605 INFO L403 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:02,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:02,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1081806200, now seen corresponding path program 47 times [2022-03-20 17:50:02,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:02,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1148677683] [2022-03-20 17:50:02,689 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:50:02,689 INFO L85 PathProgramCache]: Analyzing trace with hash 480020936, now seen corresponding path program 1 times [2022-03-20 17:50:02,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:02,691 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844538407] [2022-03-20 17:50:02,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:02,691 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:02,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:02,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:50:02,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:02,737 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844538407] [2022-03-20 17:50:02,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844538407] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:02,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:02,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:50:06,546 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:06,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1148677683] [2022-03-20 17:50:06,546 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1148677683] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:06,546 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:06,546 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-03-20 17:50:06,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650059464] [2022-03-20 17:50:06,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:06,547 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-03-20 17:50:06,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:06,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-03-20 17:50:06,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=10098, Unknown=0, NotChecked=0, Total=10302 [2022-03-20 17:50:06,548 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 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) [2022-03-20 17:50:13,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:13,093 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2022-03-20 17:50:13,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-03-20 17:50:13,094 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 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 [2022-03-20 17:50:13,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:13,094 INFO L225 Difference]: With dead ends: 114 [2022-03-20 17:50:13,094 INFO L226 Difference]: Without dead ends: 109 [2022-03-20 17:50:13,096 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4853 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=592, Invalid=38414, Unknown=0, NotChecked=0, Total=39006 [2022-03-20 17:50:13,096 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 9996 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 10093 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 9996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:13,096 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 503 Invalid, 10093 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 9996 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-03-20 17:50:13,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-03-20 17:50:13,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2022-03-20 17:50:13,101 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) [2022-03-20 17:50:13,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2022-03-20 17:50:13,101 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2022-03-20 17:50:13,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:13,102 INFO L478 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2022-03-20 17:50:13,102 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.00990099009901) internal successors, (102), 99 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) [2022-03-20 17:50:13,102 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2022-03-20 17:50:13,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-03-20 17:50:13,102 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:13,102 INFO L499 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:13,102 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-03-20 17:50:13,102 INFO L403 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:13,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:13,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1365220438, now seen corresponding path program 48 times [2022-03-20 17:50:13,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:13,103 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [27370905] [2022-03-20 17:50:13,348 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:50:13,349 INFO L85 PathProgramCache]: Analyzing trace with hash 539126280, now seen corresponding path program 1 times [2022-03-20 17:50:13,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:13,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003198177] [2022-03-20 17:50:13,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:13,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:13,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:13,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:13,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:13,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:50:13,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:13,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003198177] [2022-03-20 17:50:13,410 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003198177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:13,410 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:13,410 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:50:17,412 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:17,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [27370905] [2022-03-20 17:50:17,412 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [27370905] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:17,412 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:17,412 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-03-20 17:50:17,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562245628] [2022-03-20 17:50:17,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:17,413 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-03-20 17:50:17,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:17,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-03-20 17:50:17,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=10611, Unknown=0, NotChecked=0, Total=10920 [2022-03-20 17:50:17,414 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 102 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) [2022-03-20 17:50:24,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:24,614 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2022-03-20 17:50:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-03-20 17:50:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 102 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 [2022-03-20 17:50:24,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:24,615 INFO L225 Difference]: With dead ends: 116 [2022-03-20 17:50:24,615 INFO L226 Difference]: Without dead ends: 111 [2022-03-20 17:50:24,617 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5648 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=820, Invalid=41410, Unknown=0, NotChecked=0, Total=42230 [2022-03-20 17:50:24,617 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 10301 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 10402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 10301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:24,617 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 507 Invalid, 10402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 10301 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:50:24,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2022-03-20 17:50:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 111. [2022-03-20 17:50:24,622 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) [2022-03-20 17:50:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2022-03-20 17:50:24,622 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2022-03-20 17:50:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:24,623 INFO L478 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2022-03-20 17:50:24,623 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 102 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) [2022-03-20 17:50:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2022-03-20 17:50:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-03-20 17:50:24,623 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:24,623 INFO L499 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:24,623 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-03-20 17:50:24,623 INFO L403 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:24,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1151603788, now seen corresponding path program 49 times [2022-03-20 17:50:24,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:24,624 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [284399818] [2022-03-20 17:50:24,709 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:50:24,710 INFO L85 PathProgramCache]: Analyzing trace with hash 598231624, now seen corresponding path program 1 times [2022-03-20 17:50:24,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:24,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875430189] [2022-03-20 17:50:24,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:24,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:24,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:24,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:50:24,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:24,763 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875430189] [2022-03-20 17:50:24,763 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875430189] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:24,763 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:24,764 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:50:28,931 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:28,931 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [284399818] [2022-03-20 17:50:28,931 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [284399818] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:28,931 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:28,932 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-03-20 17:50:28,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678037265] [2022-03-20 17:50:28,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:28,932 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-03-20 17:50:28,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:28,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-03-20 17:50:28,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=10918, Unknown=0, NotChecked=0, Total=11130 [2022-03-20 17:50:28,933 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 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) [2022-03-20 17:50:35,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:35,825 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2022-03-20 17:50:35,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-03-20 17:50:35,825 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 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 [2022-03-20 17:50:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:35,826 INFO L225 Difference]: With dead ends: 118 [2022-03-20 17:50:35,826 INFO L226 Difference]: Without dead ends: 113 [2022-03-20 17:50:35,828 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=616, Invalid=41614, Unknown=0, NotChecked=0, Total=42230 [2022-03-20 17:50:35,829 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 507 mSDsCounter, 0 mSdLazyCounter, 10709 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 10810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 10709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:35,829 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 518 Invalid, 10810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 10709 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-03-20 17:50:35,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-03-20 17:50:35,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 113. [2022-03-20 17:50:35,834 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) [2022-03-20 17:50:35,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2022-03-20 17:50:35,834 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2022-03-20 17:50:35,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:35,834 INFO L478 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2022-03-20 17:50:35,834 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 103 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) [2022-03-20 17:50:35,834 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2022-03-20 17:50:35,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-03-20 17:50:35,835 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:35,835 INFO L499 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:35,835 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-03-20 17:50:35,835 INFO L403 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:35,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:35,835 INFO L85 PathProgramCache]: Analyzing trace with hash -1753097326, now seen corresponding path program 50 times [2022-03-20 17:50:35,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:35,835 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2030853787] [2022-03-20 17:50:35,968 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:50:35,969 INFO L85 PathProgramCache]: Analyzing trace with hash 657336968, now seen corresponding path program 1 times [2022-03-20 17:50:35,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:35,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623363083] [2022-03-20 17:50:35,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:35,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:35,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:36,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:36,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:36,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:50:36,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:36,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623363083] [2022-03-20 17:50:36,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623363083] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:36,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:36,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:50:40,394 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:40,395 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2030853787] [2022-03-20 17:50:40,395 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2030853787] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:40,395 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:40,395 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-03-20 17:50:40,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593095207] [2022-03-20 17:50:40,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:40,395 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-03-20 17:50:40,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:40,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-03-20 17:50:40,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11340, Unknown=0, NotChecked=0, Total=11556 [2022-03-20 17:50:40,396 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 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) [2022-03-20 17:50:47,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:50:47,639 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2022-03-20 17:50:47,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-03-20 17:50:47,640 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 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 [2022-03-20 17:50:47,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:50:47,641 INFO L225 Difference]: With dead ends: 120 [2022-03-20 17:50:47,641 INFO L226 Difference]: Without dead ends: 115 [2022-03-20 17:50:47,642 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5462 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=628, Invalid=43262, Unknown=0, NotChecked=0, Total=43890 [2022-03-20 17:50:47,642 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 517 mSDsCounter, 0 mSdLazyCounter, 11127 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 11230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 11127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:50:47,642 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 528 Invalid, 11230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 11127 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-03-20 17:50:47,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-03-20 17:50:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-03-20 17:50:47,647 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) [2022-03-20 17:50:47,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2022-03-20 17:50:47,647 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2022-03-20 17:50:47,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:50:47,648 INFO L478 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2022-03-20 17:50:47,648 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 105 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) [2022-03-20 17:50:47,648 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2022-03-20 17:50:47,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-03-20 17:50:47,648 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:50:47,648 INFO L499 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:50:47,648 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-03-20 17:50:47,648 INFO L403 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:50:47,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:50:47,649 INFO L85 PathProgramCache]: Analyzing trace with hash 32197616, now seen corresponding path program 51 times [2022-03-20 17:50:47,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:47,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1779384650] [2022-03-20 17:50:47,764 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:50:47,764 INFO L85 PathProgramCache]: Analyzing trace with hash 716442312, now seen corresponding path program 1 times [2022-03-20 17:50:47,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:50:47,764 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666327912] [2022-03-20 17:50:47,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:50:47,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:50:47,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:47,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:50:47,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:50:47,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:50:47,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:50:47,808 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666327912] [2022-03-20 17:50:47,808 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666327912] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:47,808 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:47,809 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:50:52,237 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:50:52,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1779384650] [2022-03-20 17:50:52,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1779384650] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:50:52,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:50:52,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-03-20 17:50:52,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154704152] [2022-03-20 17:50:52,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:50:52,238 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-03-20 17:50:52,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:50:52,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-03-20 17:50:52,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=11556, Unknown=0, NotChecked=0, Total=11772 [2022-03-20 17:50:52,239 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 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) [2022-03-20 17:51:00,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:00,021 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2022-03-20 17:51:00,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-03-20 17:51:00,022 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 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 [2022-03-20 17:51:00,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:00,023 INFO L225 Difference]: With dead ends: 122 [2022-03-20 17:51:00,023 INFO L226 Difference]: Without dead ends: 117 [2022-03-20 17:51:00,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5563 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=634, Invalid=44522, Unknown=0, NotChecked=0, Total=45156 [2022-03-20 17:51:00,025 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 11660 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 543 SdHoareTripleChecker+Invalid, 11765 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 11660 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:00,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 543 Invalid, 11765 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 11660 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-03-20 17:51:00,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2022-03-20 17:51:00,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 117. [2022-03-20 17:51:00,030 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) [2022-03-20 17:51:00,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2022-03-20 17:51:00,030 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2022-03-20 17:51:00,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:00,030 INFO L478 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2022-03-20 17:51:00,030 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.0091743119266054) internal successors, (110), 107 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) [2022-03-20 17:51:00,030 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2022-03-20 17:51:00,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-03-20 17:51:00,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:00,031 INFO L499 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:00,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-03-20 17:51:00,031 INFO L403 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:00,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:00,031 INFO L85 PathProgramCache]: Analyzing trace with hash 2008685774, now seen corresponding path program 52 times [2022-03-20 17:51:00,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:00,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1695986074] [2022-03-20 17:51:00,165 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:51:00,165 INFO L85 PathProgramCache]: Analyzing trace with hash 775547656, now seen corresponding path program 1 times [2022-03-20 17:51:00,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:00,166 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074080042] [2022-03-20 17:51:00,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:00,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:00,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:00,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:00,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:00,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:51:00,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:00,205 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074080042] [2022-03-20 17:51:00,205 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074080042] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:00,205 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:00,205 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:51:04,985 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:04,985 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1695986074] [2022-03-20 17:51:04,985 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1695986074] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:04,985 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:04,985 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-03-20 17:51:04,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766852578] [2022-03-20 17:51:04,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:04,985 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-03-20 17:51:04,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:04,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-03-20 17:51:04,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=11990, Unknown=0, NotChecked=0, Total=12210 [2022-03-20 17:51:04,987 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 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) [2022-03-20 17:51:13,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:13,075 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2022-03-20 17:51:13,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-03-20 17:51:13,076 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 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 [2022-03-20 17:51:13,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:13,077 INFO L225 Difference]: With dead ends: 124 [2022-03-20 17:51:13,077 INFO L226 Difference]: Without dead ends: 119 [2022-03-20 17:51:13,079 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5776 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=646, Invalid=46226, Unknown=0, NotChecked=0, Total=46872 [2022-03-20 17:51:13,079 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 12096 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 553 SdHoareTripleChecker+Invalid, 12203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 12096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:13,079 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 553 Invalid, 12203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 12096 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-03-20 17:51:13,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-03-20 17:51:13,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 119. [2022-03-20 17:51:13,084 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) [2022-03-20 17:51:13,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2022-03-20 17:51:13,085 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2022-03-20 17:51:13,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:13,085 INFO L478 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2022-03-20 17:51:13,085 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.009009009009009) internal successors, (112), 109 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) [2022-03-20 17:51:13,085 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2022-03-20 17:51:13,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-03-20 17:51:13,085 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:13,086 INFO L499 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:13,086 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-03-20 17:51:13,086 INFO L403 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:13,086 INFO L85 PathProgramCache]: Analyzing trace with hash -1256706516, now seen corresponding path program 53 times [2022-03-20 17:51:13,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:13,086 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1988472393] [2022-03-20 17:51:13,213 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:51:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash 834653000, now seen corresponding path program 1 times [2022-03-20 17:51:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:13,214 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628387133] [2022-03-20 17:51:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:13,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:13,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:13,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:13,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:51:13,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:13,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628387133] [2022-03-20 17:51:13,276 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628387133] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:13,276 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:13,276 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:51:18,325 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:18,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1988472393] [2022-03-20 17:51:18,325 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1988472393] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:18,325 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:18,325 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-03-20 17:51:18,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485685190] [2022-03-20 17:51:18,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:18,326 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-03-20 17:51:18,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:18,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-03-20 17:51:18,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=12654, Unknown=0, NotChecked=0, Total=12882 [2022-03-20 17:51:18,327 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 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) [2022-03-20 17:51:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:26,859 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2022-03-20 17:51:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-03-20 17:51:26,859 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 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 [2022-03-20 17:51:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:26,860 INFO L225 Difference]: With dead ends: 126 [2022-03-20 17:51:26,860 INFO L226 Difference]: Without dead ends: 121 [2022-03-20 17:51:26,862 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6107 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=664, Invalid=48398, Unknown=0, NotChecked=0, Total=49062 [2022-03-20 17:51:26,862 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 12429 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 12538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 12429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:26,862 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 558 Invalid, 12538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 12429 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-03-20 17:51:26,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-03-20 17:51:26,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 121. [2022-03-20 17:51:26,867 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) [2022-03-20 17:51:26,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2022-03-20 17:51:26,868 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2022-03-20 17:51:26,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:26,868 INFO L478 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2022-03-20 17:51:26,868 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.008849557522124) internal successors, (114), 111 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) [2022-03-20 17:51:26,868 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2022-03-20 17:51:26,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-03-20 17:51:26,869 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:26,869 INFO L499 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:26,869 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-03-20 17:51:26,869 INFO L403 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:26,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:26,869 INFO L85 PathProgramCache]: Analyzing trace with hash 322396170, now seen corresponding path program 54 times [2022-03-20 17:51:26,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:26,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1576294895] [2022-03-20 17:51:27,003 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:51:27,004 INFO L85 PathProgramCache]: Analyzing trace with hash 893758344, now seen corresponding path program 1 times [2022-03-20 17:51:27,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:27,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016204761] [2022-03-20 17:51:27,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:27,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:27,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:27,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:51:27,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:27,054 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016204761] [2022-03-20 17:51:27,054 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016204761] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:27,054 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:27,054 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:51:32,289 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:32,290 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1576294895] [2022-03-20 17:51:32,290 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1576294895] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:32,290 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:32,290 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-03-20 17:51:32,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113593225] [2022-03-20 17:51:32,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:32,290 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-03-20 17:51:32,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:32,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-03-20 17:51:32,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=13108, Unknown=0, NotChecked=0, Total=13340 [2022-03-20 17:51:32,292 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 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) [2022-03-20 17:51:41,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:41,161 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2022-03-20 17:51:41,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-03-20 17:51:41,161 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 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 [2022-03-20 17:51:41,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:41,162 INFO L225 Difference]: With dead ends: 128 [2022-03-20 17:51:41,162 INFO L226 Difference]: Without dead ends: 123 [2022-03-20 17:51:41,164 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6330 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=676, Invalid=50174, Unknown=0, NotChecked=0, Total=50850 [2022-03-20 17:51:41,164 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 557 mSDsCounter, 0 mSdLazyCounter, 12879 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 568 SdHoareTripleChecker+Invalid, 12990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 12879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:41,164 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 568 Invalid, 12990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 12879 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-03-20 17:51:41,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-03-20 17:51:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 123. [2022-03-20 17:51:41,169 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) [2022-03-20 17:51:41,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2022-03-20 17:51:41,170 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2022-03-20 17:51:41,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:41,170 INFO L478 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2022-03-20 17:51:41,170 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.008695652173913) internal successors, (116), 113 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) [2022-03-20 17:51:41,170 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2022-03-20 17:51:41,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-03-20 17:51:41,170 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:41,171 INFO L499 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:41,171 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-03-20 17:51:41,171 INFO L403 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:41,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1716621928, now seen corresponding path program 55 times [2022-03-20 17:51:41,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:41,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [805326746] [2022-03-20 17:51:41,307 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:51:41,307 INFO L85 PathProgramCache]: Analyzing trace with hash 952863688, now seen corresponding path program 1 times [2022-03-20 17:51:41,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:41,308 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653300488] [2022-03-20 17:51:41,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:41,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:41,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:41,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:41,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:41,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:51:41,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:41,352 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653300488] [2022-03-20 17:51:41,352 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653300488] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:41,352 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:41,352 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:51:46,781 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:51:46,781 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [805326746] [2022-03-20 17:51:46,781 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [805326746] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:46,781 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:46,781 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-03-20 17:51:46,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985966577] [2022-03-20 17:51:46,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:51:46,782 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-03-20 17:51:46,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:46,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-03-20 17:51:46,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=13570, Unknown=0, NotChecked=0, Total=13806 [2022-03-20 17:51:46,783 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 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) [2022-03-20 17:51:56,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:51:56,022 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2022-03-20 17:51:56,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-03-20 17:51:56,022 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 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 [2022-03-20 17:51:56,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:51:56,023 INFO L225 Difference]: With dead ends: 130 [2022-03-20 17:51:56,023 INFO L226 Difference]: Without dead ends: 125 [2022-03-20 17:51:56,024 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6557 ImplicationChecksByTransitivity, 10.8s TimeCoverageRelationStatistics Valid=688, Invalid=51982, Unknown=0, NotChecked=0, Total=52670 [2022-03-20 17:51:56,025 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 13337 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 13450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 13337 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:51:56,025 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 578 Invalid, 13450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 13337 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 17:51:56,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-03-20 17:51:56,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-03-20 17:51:56,030 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) [2022-03-20 17:51:56,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2022-03-20 17:51:56,030 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2022-03-20 17:51:56,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:51:56,030 INFO L478 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2022-03-20 17:51:56,031 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.0085470085470085) internal successors, (118), 115 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) [2022-03-20 17:51:56,031 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2022-03-20 17:51:56,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-03-20 17:51:56,031 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:51:56,031 INFO L499 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:51:56,031 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-03-20 17:51:56,031 INFO L403 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:51:56,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:51:56,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1537779014, now seen corresponding path program 56 times [2022-03-20 17:51:56,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:51:56,032 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [168095696] [2022-03-20 17:51:56,162 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:51:56,162 INFO L85 PathProgramCache]: Analyzing trace with hash 1011969032, now seen corresponding path program 1 times [2022-03-20 17:51:56,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:51:56,162 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254558116] [2022-03-20 17:51:56,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:51:56,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:51:56,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:56,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:51:56,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:51:56,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:51:56,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:51:56,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254558116] [2022-03-20 17:51:56,213 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254558116] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:51:56,213 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:51:56,213 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:52:01,765 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:01,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [168095696] [2022-03-20 17:52:01,765 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [168095696] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:01,765 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:01,765 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-03-20 17:52:01,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856095231] [2022-03-20 17:52:01,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:01,766 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-03-20 17:52:01,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:01,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-03-20 17:52:01,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=13806, Unknown=0, NotChecked=0, Total=14042 [2022-03-20 17:52:01,767 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 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) [2022-03-20 17:52:11,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:11,033 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2022-03-20 17:52:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-03-20 17:52:11,034 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 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 [2022-03-20 17:52:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:11,034 INFO L225 Difference]: With dead ends: 132 [2022-03-20 17:52:11,034 INFO L226 Difference]: Without dead ends: 127 [2022-03-20 17:52:11,036 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6668 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=694, Invalid=53362, Unknown=0, NotChecked=0, Total=54056 [2022-03-20 17:52:11,037 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 13803 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 588 SdHoareTripleChecker+Invalid, 13918 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 13803 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:11,037 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 588 Invalid, 13918 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 13803 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-03-20 17:52:11,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-03-20 17:52:11,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2022-03-20 17:52:11,042 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) [2022-03-20 17:52:11,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2022-03-20 17:52:11,042 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2022-03-20 17:52:11,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:11,042 INFO L478 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2022-03-20 17:52:11,042 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.0084033613445378) internal successors, (120), 117 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) [2022-03-20 17:52:11,042 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2022-03-20 17:52:11,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-03-20 17:52:11,043 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:11,043 INFO L499 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:11,043 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-03-20 17:52:11,043 INFO L403 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:11,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:11,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1468430500, now seen corresponding path program 57 times [2022-03-20 17:52:11,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:11,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1565945548] [2022-03-20 17:52:11,175 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:52:11,176 INFO L85 PathProgramCache]: Analyzing trace with hash 1071074376, now seen corresponding path program 1 times [2022-03-20 17:52:11,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:11,176 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391715295] [2022-03-20 17:52:11,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:11,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:11,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:11,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:11,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:11,219 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:52:11,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:11,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391715295] [2022-03-20 17:52:11,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391715295] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:11,219 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:11,219 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:52:16,757 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:16,757 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1565945548] [2022-03-20 17:52:16,757 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1565945548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:16,757 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:16,757 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-03-20 17:52:16,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88370147] [2022-03-20 17:52:16,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:16,758 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-03-20 17:52:16,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:16,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-03-20 17:52:16,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=14518, Unknown=0, NotChecked=0, Total=14762 [2022-03-20 17:52:16,759 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 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) [2022-03-20 17:52:26,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:26,532 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2022-03-20 17:52:26,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-03-20 17:52:26,533 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 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 [2022-03-20 17:52:26,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:26,534 INFO L225 Difference]: With dead ends: 134 [2022-03-20 17:52:26,534 INFO L226 Difference]: Without dead ends: 129 [2022-03-20 17:52:26,536 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7023 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=712, Invalid=55694, Unknown=0, NotChecked=0, Total=56406 [2022-03-20 17:52:26,536 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 14396 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 603 SdHoareTripleChecker+Invalid, 14513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 14396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:26,536 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 603 Invalid, 14513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 14396 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-03-20 17:52:26,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-03-20 17:52:26,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2022-03-20 17:52:26,541 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) [2022-03-20 17:52:26,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2022-03-20 17:52:26,542 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2022-03-20 17:52:26,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:26,542 INFO L478 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2022-03-20 17:52:26,542 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.0082644628099173) internal successors, (122), 119 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) [2022-03-20 17:52:26,542 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2022-03-20 17:52:26,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-03-20 17:52:26,542 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:26,542 INFO L499 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:26,542 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-03-20 17:52:26,542 INFO L403 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:26,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:26,543 INFO L85 PathProgramCache]: Analyzing trace with hash -750982014, now seen corresponding path program 58 times [2022-03-20 17:52:26,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:26,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [214641070] [2022-03-20 17:52:26,669 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:52:26,670 INFO L85 PathProgramCache]: Analyzing trace with hash 1130179720, now seen corresponding path program 1 times [2022-03-20 17:52:26,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:26,670 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356514762] [2022-03-20 17:52:26,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:26,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:26,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:26,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:26,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:52:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:26,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356514762] [2022-03-20 17:52:26,726 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356514762] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:26,726 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:26,726 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:52:32,422 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:32,422 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [214641070] [2022-03-20 17:52:32,422 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [214641070] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:32,422 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:32,422 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-03-20 17:52:32,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126008413] [2022-03-20 17:52:32,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:32,423 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-03-20 17:52:32,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:32,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-03-20 17:52:32,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=15004, Unknown=0, NotChecked=0, Total=15252 [2022-03-20 17:52:32,425 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 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) [2022-03-20 17:52:41,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:41,998 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2022-03-20 17:52:41,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-03-20 17:52:41,999 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 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 [2022-03-20 17:52:41,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:41,999 INFO L225 Difference]: With dead ends: 136 [2022-03-20 17:52:41,999 INFO L226 Difference]: Without dead ends: 131 [2022-03-20 17:52:42,002 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 240 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7262 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=724, Invalid=57598, Unknown=0, NotChecked=0, Total=58322 [2022-03-20 17:52:42,002 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 14759 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 14878 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 14759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:42,002 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 608 Invalid, 14878 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 14759 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-03-20 17:52:42,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-03-20 17:52:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2022-03-20 17:52:42,007 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) [2022-03-20 17:52:42,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2022-03-20 17:52:42,008 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2022-03-20 17:52:42,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:42,008 INFO L478 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2022-03-20 17:52:42,008 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.008130081300813) internal successors, (124), 121 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) [2022-03-20 17:52:42,008 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2022-03-20 17:52:42,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-03-20 17:52:42,008 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:42,009 INFO L499 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:42,009 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-03-20 17:52:42,009 INFO L403 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:42,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:42,009 INFO L85 PathProgramCache]: Analyzing trace with hash 992338144, now seen corresponding path program 59 times [2022-03-20 17:52:42,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:42,009 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [477247553] [2022-03-20 17:52:42,247 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:52:42,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1189285064, now seen corresponding path program 1 times [2022-03-20 17:52:42,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:42,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045289484] [2022-03-20 17:52:42,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:42,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:42,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:42,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:42,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:42,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:52:42,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:42,301 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045289484] [2022-03-20 17:52:42,301 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045289484] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:42,301 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:42,301 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:52:48,212 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:52:48,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [477247553] [2022-03-20 17:52:48,212 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [477247553] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:48,212 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:48,212 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-03-20 17:52:48,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493696613] [2022-03-20 17:52:48,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:52:48,213 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-03-20 17:52:48,213 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:48,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-03-20 17:52:48,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=15498, Unknown=0, NotChecked=0, Total=15750 [2022-03-20 17:52:48,214 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 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) [2022-03-20 17:52:58,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:52:58,669 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2022-03-20 17:52:58,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-03-20 17:52:58,669 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 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 [2022-03-20 17:52:58,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:52:58,670 INFO L225 Difference]: With dead ends: 138 [2022-03-20 17:52:58,670 INFO L226 Difference]: Without dead ends: 133 [2022-03-20 17:52:58,673 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 244 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7505 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=736, Invalid=59534, Unknown=0, NotChecked=0, Total=60270 [2022-03-20 17:52:58,673 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 15249 mSolverCounterSat, 121 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 15370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 121 IncrementalHoareTripleChecker+Valid, 15249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:52:58,673 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 618 Invalid, 15370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [121 Valid, 15249 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-03-20 17:52:58,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-03-20 17:52:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-03-20 17:52:58,678 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) [2022-03-20 17:52:58,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2022-03-20 17:52:58,679 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2022-03-20 17:52:58,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:52:58,679 INFO L478 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2022-03-20 17:52:58,679 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.008) internal successors, (126), 123 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) [2022-03-20 17:52:58,679 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2022-03-20 17:52:58,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-03-20 17:52:58,680 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:52:58,680 INFO L499 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:52:58,680 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-03-20 17:52:58,680 INFO L403 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:52:58,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:52:58,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1285764542, now seen corresponding path program 60 times [2022-03-20 17:52:58,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:52:58,680 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1187956040] [2022-03-20 17:52:58,780 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:52:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 1248390408, now seen corresponding path program 1 times [2022-03-20 17:52:58,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:52:58,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080448590] [2022-03-20 17:52:58,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:52:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:52:58,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:58,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:52:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:52:58,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:52:58,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:52:58,828 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080448590] [2022-03-20 17:52:58,828 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080448590] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:52:58,828 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:52:58,828 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:53:05,238 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:05,238 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1187956040] [2022-03-20 17:53:05,238 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1187956040] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:05,238 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:05,238 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-03-20 17:53:05,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019138815] [2022-03-20 17:53:05,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:05,239 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-03-20 17:53:05,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:05,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-03-20 17:53:05,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=16000, Unknown=0, NotChecked=0, Total=16256 [2022-03-20 17:53:05,240 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 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) [2022-03-20 17:53:15,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:15,935 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2022-03-20 17:53:15,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-03-20 17:53:15,936 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 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 [2022-03-20 17:53:15,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:15,937 INFO L225 Difference]: With dead ends: 140 [2022-03-20 17:53:15,937 INFO L226 Difference]: Without dead ends: 135 [2022-03-20 17:53:15,939 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 255 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 248 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7752 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=748, Invalid=61502, Unknown=0, NotChecked=0, Total=62250 [2022-03-20 17:53:15,939 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 617 mSDsCounter, 0 mSdLazyCounter, 15747 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 15870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 15747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:15,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 628 Invalid, 15870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 15747 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 17:53:15,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-03-20 17:53:15,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-03-20 17:53:15,945 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) [2022-03-20 17:53:15,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2022-03-20 17:53:15,945 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2022-03-20 17:53:15,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:15,945 INFO L478 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2022-03-20 17:53:15,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.0078740157480315) internal successors, (128), 125 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) [2022-03-20 17:53:15,945 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2022-03-20 17:53:15,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-03-20 17:53:15,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:15,946 INFO L499 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:15,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-03-20 17:53:15,946 INFO L403 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:15,946 INFO L85 PathProgramCache]: Analyzing trace with hash -199308516, now seen corresponding path program 61 times [2022-03-20 17:53:15,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:15,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1794911497] [2022-03-20 17:53:16,072 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:53:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash 1307495752, now seen corresponding path program 1 times [2022-03-20 17:53:16,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:16,073 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276468686] [2022-03-20 17:53:16,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:16,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:16,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:16,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:16,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:53:16,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:16,109 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276468686] [2022-03-20 17:53:16,109 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276468686] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:16,109 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:16,109 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:53:22,263 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:22,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1794911497] [2022-03-20 17:53:22,263 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1794911497] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:22,263 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:22,263 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-03-20 17:53:22,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991685326] [2022-03-20 17:53:22,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:22,263 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-03-20 17:53:22,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:22,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-03-20 17:53:22,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=16256, Unknown=0, NotChecked=0, Total=16512 [2022-03-20 17:53:22,265 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 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) [2022-03-20 17:53:32,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:32,888 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2022-03-20 17:53:32,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-03-20 17:53:32,889 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 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 [2022-03-20 17:53:32,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:32,890 INFO L225 Difference]: With dead ends: 142 [2022-03-20 17:53:32,890 INFO L226 Difference]: Without dead ends: 137 [2022-03-20 17:53:32,892 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7873 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=754, Invalid=63002, Unknown=0, NotChecked=0, Total=63756 [2022-03-20 17:53:32,893 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 16253 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 16378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 16253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:32,893 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 638 Invalid, 16378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 16253 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-03-20 17:53:32,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-03-20 17:53:32,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-03-20 17:53:32,899 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) [2022-03-20 17:53:32,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2022-03-20 17:53:32,899 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2022-03-20 17:53:32,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:32,899 INFO L478 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2022-03-20 17:53:32,899 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.0077519379844961) internal successors, (130), 127 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) [2022-03-20 17:53:32,899 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2022-03-20 17:53:32,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-03-20 17:53:32,900 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:32,900 INFO L499 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:32,900 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-03-20 17:53:32,900 INFO L403 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:32,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:32,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1425374982, now seen corresponding path program 62 times [2022-03-20 17:53:32,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:32,900 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [288937483] [2022-03-20 17:53:33,041 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:53:33,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1366601096, now seen corresponding path program 1 times [2022-03-20 17:53:33,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:33,042 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690190597] [2022-03-20 17:53:33,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:33,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:33,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:33,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:33,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:33,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:53:33,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:33,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690190597] [2022-03-20 17:53:33,100 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690190597] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:33,100 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:33,100 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:53:39,682 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:39,682 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [288937483] [2022-03-20 17:53:39,682 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [288937483] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:39,682 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:39,682 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-03-20 17:53:39,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365605639] [2022-03-20 17:53:39,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:39,683 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-03-20 17:53:39,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-03-20 17:53:39,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=264, Invalid=17028, Unknown=0, NotChecked=0, Total=17292 [2022-03-20 17:53:39,684 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 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) [2022-03-20 17:53:50,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:53:50,588 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2022-03-20 17:53:50,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-03-20 17:53:50,589 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 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 [2022-03-20 17:53:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:53:50,590 INFO L225 Difference]: With dead ends: 144 [2022-03-20 17:53:50,590 INFO L226 Difference]: Without dead ends: 139 [2022-03-20 17:53:50,593 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 256 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8258 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=772, Invalid=65534, Unknown=0, NotChecked=0, Total=66306 [2022-03-20 17:53:50,593 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 16896 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 653 SdHoareTripleChecker+Invalid, 17023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 16896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:53:50,593 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 653 Invalid, 17023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 16896 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-03-20 17:53:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2022-03-20 17:53:50,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2022-03-20 17:53:50,599 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) [2022-03-20 17:53:50,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2022-03-20 17:53:50,599 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2022-03-20 17:53:50,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:53:50,599 INFO L478 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2022-03-20 17:53:50,600 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.0076335877862594) internal successors, (132), 129 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) [2022-03-20 17:53:50,600 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2022-03-20 17:53:50,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-03-20 17:53:50,600 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:53:50,600 INFO L499 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:53:50,600 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-03-20 17:53:50,600 INFO L403 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:53:50,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:53:50,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1440757592, now seen corresponding path program 63 times [2022-03-20 17:53:50,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:50,601 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1116615028] [2022-03-20 17:53:50,719 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:53:50,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1425706440, now seen corresponding path program 1 times [2022-03-20 17:53:50,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:53:50,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551778988] [2022-03-20 17:53:50,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:53:50,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:53:50,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:50,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:53:50,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:53:50,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:53:50,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:53:50,786 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551778988] [2022-03-20 17:53:50,787 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551778988] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:50,787 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:50,787 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:53:57,639 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:53:57,639 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1116615028] [2022-03-20 17:53:57,640 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1116615028] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:53:57,640 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:53:57,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-03-20 17:53:57,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922146171] [2022-03-20 17:53:57,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:53:57,640 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-03-20 17:53:57,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:53:57,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-03-20 17:53:57,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=17554, Unknown=0, NotChecked=0, Total=17822 [2022-03-20 17:53:57,641 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 133 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 131 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) [2022-03-20 17:54:08,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:08,935 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2022-03-20 17:54:08,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-03-20 17:54:08,936 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 131 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 [2022-03-20 17:54:08,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:08,936 INFO L225 Difference]: With dead ends: 146 [2022-03-20 17:54:08,936 INFO L226 Difference]: Without dead ends: 141 [2022-03-20 17:54:08,938 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 260 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8517 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=784, Invalid=67598, Unknown=0, NotChecked=0, Total=68382 [2022-03-20 17:54:08,939 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 17289 mSolverCounterSat, 129 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 658 SdHoareTripleChecker+Invalid, 17418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 129 IncrementalHoareTripleChecker+Valid, 17289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:08,939 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 658 Invalid, 17418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [129 Valid, 17289 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-03-20 17:54:08,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2022-03-20 17:54:08,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 141. [2022-03-20 17:54:08,945 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) [2022-03-20 17:54:08,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2022-03-20 17:54:08,945 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2022-03-20 17:54:08,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:08,945 INFO L478 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2022-03-20 17:54:08,945 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.0075187969924813) internal successors, (134), 131 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) [2022-03-20 17:54:08,945 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2022-03-20 17:54:08,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-03-20 17:54:08,946 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:08,946 INFO L499 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:08,946 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-03-20 17:54:08,946 INFO L403 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:08,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:08,946 INFO L85 PathProgramCache]: Analyzing trace with hash -1574842826, now seen corresponding path program 64 times [2022-03-20 17:54:08,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:08,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1012689893] [2022-03-20 17:54:09,084 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:54:09,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1484811784, now seen corresponding path program 1 times [2022-03-20 17:54:09,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:09,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514011531] [2022-03-20 17:54:09,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:09,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:09,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:09,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:54:09,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:09,138 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514011531] [2022-03-20 17:54:09,138 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514011531] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:09,138 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:09,138 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:54:16,122 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:16,122 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1012689893] [2022-03-20 17:54:16,122 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1012689893] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:16,122 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:16,122 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-03-20 17:54:16,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324047348] [2022-03-20 17:54:16,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:16,123 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-03-20 17:54:16,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-03-20 17:54:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=18088, Unknown=0, NotChecked=0, Total=18360 [2022-03-20 17:54:16,124 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 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) [2022-03-20 17:54:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:28,546 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2022-03-20 17:54:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-03-20 17:54:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 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 [2022-03-20 17:54:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:28,547 INFO L225 Difference]: With dead ends: 148 [2022-03-20 17:54:28,547 INFO L226 Difference]: Without dead ends: 143 [2022-03-20 17:54:28,549 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 264 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8780 ImplicationChecksByTransitivity, 14.1s TimeCoverageRelationStatistics Valid=796, Invalid=69694, Unknown=0, NotChecked=0, Total=70490 [2022-03-20 17:54:28,550 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 17819 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 17950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 17819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:28,550 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 668 Invalid, 17950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 17819 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 17:54:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-03-20 17:54:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-03-20 17:54:28,556 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) [2022-03-20 17:54:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2022-03-20 17:54:28,556 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2022-03-20 17:54:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:28,556 INFO L478 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2022-03-20 17:54:28,556 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.0074074074074073) internal successors, (136), 133 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) [2022-03-20 17:54:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2022-03-20 17:54:28,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-03-20 17:54:28,557 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:28,557 INFO L499 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:28,557 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-03-20 17:54:28,557 INFO L403 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:28,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:28,557 INFO L85 PathProgramCache]: Analyzing trace with hash -463919724, now seen corresponding path program 65 times [2022-03-20 17:54:28,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:28,558 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [619820072] [2022-03-20 17:54:28,655 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:54:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash 1543917128, now seen corresponding path program 1 times [2022-03-20 17:54:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:28,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999196124] [2022-03-20 17:54:28,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:28,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:28,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:28,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:28,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:54:28,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:28,716 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999196124] [2022-03-20 17:54:28,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999196124] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:28,716 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:28,716 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:54:36,184 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:36,184 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [619820072] [2022-03-20 17:54:36,184 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [619820072] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:36,185 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:36,185 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-03-20 17:54:36,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246983168] [2022-03-20 17:54:36,185 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:36,185 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-03-20 17:54:36,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:36,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-03-20 17:54:36,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=18630, Unknown=0, NotChecked=0, Total=18906 [2022-03-20 17:54:36,186 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 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) [2022-03-20 17:54:48,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:54:48,396 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2022-03-20 17:54:48,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-03-20 17:54:48,397 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 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 [2022-03-20 17:54:48,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:54:48,397 INFO L225 Difference]: With dead ends: 150 [2022-03-20 17:54:48,397 INFO L226 Difference]: Without dead ends: 145 [2022-03-20 17:54:48,400 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 268 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9047 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=808, Invalid=71822, Unknown=0, NotChecked=0, Total=72630 [2022-03-20 17:54:48,400 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 667 mSDsCounter, 0 mSdLazyCounter, 18357 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 678 SdHoareTripleChecker+Invalid, 18490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 18357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-03-20 17:54:48,400 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 678 Invalid, 18490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 18357 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-03-20 17:54:48,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-03-20 17:54:48,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-03-20 17:54:48,406 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) [2022-03-20 17:54:48,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2022-03-20 17:54:48,406 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2022-03-20 17:54:48,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:54:48,407 INFO L478 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2022-03-20 17:54:48,407 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.0072992700729928) internal successors, (138), 135 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) [2022-03-20 17:54:48,407 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2022-03-20 17:54:48,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-03-20 17:54:48,407 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:54:48,407 INFO L499 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:54:48,407 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-03-20 17:54:48,407 INFO L403 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:54:48,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:54:48,408 INFO L85 PathProgramCache]: Analyzing trace with hash 1981291890, now seen corresponding path program 66 times [2022-03-20 17:54:48,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:48,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [928330516] [2022-03-20 17:54:48,526 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:54:48,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1603022472, now seen corresponding path program 1 times [2022-03-20 17:54:48,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:54:48,527 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675187158] [2022-03-20 17:54:48,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:54:48,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:54:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:48,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:54:48,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:54:48,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:54:48,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:54:48,583 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675187158] [2022-03-20 17:54:48,583 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675187158] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:48,583 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:48,583 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:54:56,097 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:54:56,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [928330516] [2022-03-20 17:54:56,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [928330516] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:54:56,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:54:56,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-03-20 17:54:56,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344784884] [2022-03-20 17:54:56,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:54:56,097 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-03-20 17:54:56,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:54:56,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-03-20 17:54:56,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=19180, Unknown=0, NotChecked=0, Total=19460 [2022-03-20 17:54:56,099 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 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) [2022-03-20 17:55:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:08,715 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2022-03-20 17:55:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-03-20 17:55:08,716 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 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 [2022-03-20 17:55:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:08,717 INFO L225 Difference]: With dead ends: 152 [2022-03-20 17:55:08,717 INFO L226 Difference]: Without dead ends: 147 [2022-03-20 17:55:08,719 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 272 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9318 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=820, Invalid=73982, Unknown=0, NotChecked=0, Total=74802 [2022-03-20 17:55:08,720 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 19040 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 693 SdHoareTripleChecker+Invalid, 19175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 19040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:08,720 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 693 Invalid, 19175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 19040 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-03-20 17:55:08,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2022-03-20 17:55:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 147. [2022-03-20 17:55:08,726 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) [2022-03-20 17:55:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2022-03-20 17:55:08,726 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2022-03-20 17:55:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:08,726 INFO L478 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2022-03-20 17:55:08,726 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.0071942446043165) internal successors, (140), 137 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) [2022-03-20 17:55:08,726 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2022-03-20 17:55:08,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-03-20 17:55:08,727 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:08,727 INFO L499 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:08,727 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-03-20 17:55:08,727 INFO L403 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:08,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:08,727 INFO L85 PathProgramCache]: Analyzing trace with hash -1812425264, now seen corresponding path program 67 times [2022-03-20 17:55:08,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:08,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1789462032] [2022-03-20 17:55:08,861 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:55:08,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1662127816, now seen corresponding path program 1 times [2022-03-20 17:55:08,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:08,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844658394] [2022-03-20 17:55:08,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:08,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:08,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:08,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:08,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:55:08,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:08,912 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844658394] [2022-03-20 17:55:08,912 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844658394] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:08,912 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:08,912 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:55:16,551 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:16,551 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1789462032] [2022-03-20 17:55:16,551 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1789462032] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:16,551 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:16,551 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-03-20 17:55:16,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934152280] [2022-03-20 17:55:16,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:16,552 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-03-20 17:55:16,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:16,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-03-20 17:55:16,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=284, Invalid=19738, Unknown=0, NotChecked=0, Total=20022 [2022-03-20 17:55:16,553 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 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) [2022-03-20 17:55:29,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:29,563 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2022-03-20 17:55:29,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-03-20 17:55:29,563 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 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 [2022-03-20 17:55:29,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:29,564 INFO L225 Difference]: With dead ends: 154 [2022-03-20 17:55:29,564 INFO L226 Difference]: Without dead ends: 149 [2022-03-20 17:55:29,566 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 276 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9593 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=832, Invalid=76174, Unknown=0, NotChecked=0, Total=77006 [2022-03-20 17:55:29,567 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 19457 mSolverCounterSat, 137 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 698 SdHoareTripleChecker+Invalid, 19594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 137 IncrementalHoareTripleChecker+Valid, 19457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:29,567 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 698 Invalid, 19594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [137 Valid, 19457 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-03-20 17:55:29,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-03-20 17:55:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 149. [2022-03-20 17:55:29,573 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) [2022-03-20 17:55:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2022-03-20 17:55:29,573 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2022-03-20 17:55:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:29,573 INFO L478 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2022-03-20 17:55:29,573 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.0070921985815602) internal successors, (142), 139 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) [2022-03-20 17:55:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2022-03-20 17:55:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-03-20 17:55:29,574 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:29,574 INFO L499 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:29,574 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-03-20 17:55:29,574 INFO L403 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:29,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:29,574 INFO L85 PathProgramCache]: Analyzing trace with hash -1147375954, now seen corresponding path program 68 times [2022-03-20 17:55:29,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:29,574 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [656226191] [2022-03-20 17:55:29,696 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:55:29,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1721233160, now seen corresponding path program 1 times [2022-03-20 17:55:29,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:29,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120684781] [2022-03-20 17:55:29,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:29,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:29,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:29,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:55:29,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:29,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120684781] [2022-03-20 17:55:29,768 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120684781] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:29,768 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:29,768 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-03-20 17:55:37,541 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:55:37,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [656226191] [2022-03-20 17:55:37,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [656226191] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:37,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:37,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-03-20 17:55:37,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567711197] [2022-03-20 17:55:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:55:37,542 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-03-20 17:55:37,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:37,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-03-20 17:55:37,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=429, Invalid=20451, Unknown=0, NotChecked=0, Total=20880 [2022-03-20 17:55:37,543 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 142 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) [2022-03-20 17:55:51,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:55:51,303 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2022-03-20 17:55:51,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-03-20 17:55:51,303 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 142 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 [2022-03-20 17:55:51,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:55:51,304 INFO L225 Difference]: With dead ends: 156 [2022-03-20 17:55:51,304 INFO L226 Difference]: Without dead ends: 151 [2022-03-20 17:55:51,307 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10708 ImplicationChecksByTransitivity, 15.8s TimeCoverageRelationStatistics Valid=1140, Invalid=80370, Unknown=0, NotChecked=0, Total=81510 [2022-03-20 17:55:51,307 INFO L913 BasicCegarLoop]: 10 mSDtfsCounter, 14 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 20162 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 20303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 20162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-03-20 17:55:51,307 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 712 Invalid, 20303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 20162 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-03-20 17:55:51,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-03-20 17:55:51,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2022-03-20 17:55:51,313 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) [2022-03-20 17:55:51,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2022-03-20 17:55:51,314 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2022-03-20 17:55:51,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:55:51,314 INFO L478 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2022-03-20 17:55:51,314 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 1.006993006993007) internal successors, (144), 142 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) [2022-03-20 17:55:51,314 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2022-03-20 17:55:51,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-03-20 17:55:51,314 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:55:51,314 INFO L499 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:55:51,315 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-03-20 17:55:51,315 INFO L403 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:55:51,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:55:51,315 INFO L85 PathProgramCache]: Analyzing trace with hash -1985116148, now seen corresponding path program 69 times [2022-03-20 17:55:51,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:55:51,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1477318339] [2022-03-20 17:55:51,447 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:55:51,448 INFO L85 PathProgramCache]: Analyzing trace with hash 1780338504, now seen corresponding path program 1 times [2022-03-20 17:55:51,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:55:51,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24704822] [2022-03-20 17:55:51,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:55:51,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:55:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:51,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:55:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:55:51,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:55:51,489 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:55:51,490 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24704822] [2022-03-20 17:55:51,490 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [24704822] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:55:51,490 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:55:51,490 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:56:00,012 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:00,012 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1477318339] [2022-03-20 17:56:00,012 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1477318339] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:00,012 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:00,012 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-03-20 17:56:00,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723738941] [2022-03-20 17:56:00,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:00,013 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-03-20 17:56:00,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:00,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-03-20 17:56:00,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=20878, Unknown=0, NotChecked=0, Total=21170 [2022-03-20 17:56:00,014 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 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) [2022-03-20 17:56:14,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:14,424 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2022-03-20 17:56:14,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-03-20 17:56:14,425 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 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 [2022-03-20 17:56:14,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:14,425 INFO L225 Difference]: With dead ends: 158 [2022-03-20 17:56:14,425 INFO L226 Difference]: Without dead ends: 153 [2022-03-20 17:56:14,428 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 284 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10155 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=856, Invalid=80654, Unknown=0, NotChecked=0, Total=81510 [2022-03-20 17:56:14,428 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 712 mSDsCounter, 0 mSdLazyCounter, 20732 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 723 SdHoareTripleChecker+Invalid, 20873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 20732 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:14,428 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 723 Invalid, 20873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 20732 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-20 17:56:14,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-03-20 17:56:14,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-03-20 17:56:14,435 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) [2022-03-20 17:56:14,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2022-03-20 17:56:14,435 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2022-03-20 17:56:14,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:14,435 INFO L478 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2022-03-20 17:56:14,435 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.006896551724138) internal successors, (146), 143 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) [2022-03-20 17:56:14,435 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2022-03-20 17:56:14,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-03-20 17:56:14,436 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:14,436 INFO L499 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:14,436 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-03-20 17:56:14,436 INFO L403 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:14,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:14,436 INFO L85 PathProgramCache]: Analyzing trace with hash 400409066, now seen corresponding path program 70 times [2022-03-20 17:56:14,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:14,436 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1824139708] [2022-03-20 17:56:14,542 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:56:14,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1839443848, now seen corresponding path program 1 times [2022-03-20 17:56:14,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:14,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188514548] [2022-03-20 17:56:14,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:14,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:14,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:14,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:14,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:56:14,585 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:14,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188514548] [2022-03-20 17:56:14,586 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188514548] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:14,586 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:14,586 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:56:23,407 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:23,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1824139708] [2022-03-20 17:56:23,407 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1824139708] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:23,407 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:23,407 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-03-20 17:56:23,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610535151] [2022-03-20 17:56:23,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:23,407 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-03-20 17:56:23,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:23,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-03-20 17:56:23,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=296, Invalid=21460, Unknown=0, NotChecked=0, Total=21756 [2022-03-20 17:56:23,409 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 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) [2022-03-20 17:56:38,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:56:38,512 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2022-03-20 17:56:38,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-03-20 17:56:38,512 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 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 [2022-03-20 17:56:38,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:56:38,513 INFO L225 Difference]: With dead ends: 160 [2022-03-20 17:56:38,513 INFO L226 Difference]: Without dead ends: 155 [2022-03-20 17:56:38,516 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10442 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=868, Invalid=82942, Unknown=0, NotChecked=0, Total=83810 [2022-03-20 17:56:38,516 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 21167 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 21310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 21167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:56:38,516 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 728 Invalid, 21310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 21167 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 17:56:38,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-03-20 17:56:38,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-03-20 17:56:38,523 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) [2022-03-20 17:56:38,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2022-03-20 17:56:38,523 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2022-03-20 17:56:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:56:38,523 INFO L478 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2022-03-20 17:56:38,523 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.0068027210884354) internal successors, (148), 145 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) [2022-03-20 17:56:38,523 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2022-03-20 17:56:38,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-03-20 17:56:38,524 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:56:38,524 INFO L499 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:56:38,524 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-03-20 17:56:38,524 INFO L403 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:56:38,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:56:38,524 INFO L85 PathProgramCache]: Analyzing trace with hash -622396344, now seen corresponding path program 71 times [2022-03-20 17:56:38,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:38,524 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [2072701376] [2022-03-20 17:56:38,626 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:56:38,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1898549192, now seen corresponding path program 1 times [2022-03-20 17:56:38,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:56:38,627 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125188155] [2022-03-20 17:56:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:56:38,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:56:38,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:38,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:56:38,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:56:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:56:38,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:56:38,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125188155] [2022-03-20 17:56:38,685 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125188155] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:38,685 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:38,685 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:56:47,318 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:56:47,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [2072701376] [2022-03-20 17:56:47,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [2072701376] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:56:47,319 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:56:47,319 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-03-20 17:56:47,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832350448] [2022-03-20 17:56:47,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:56:47,319 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-03-20 17:56:47,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:56:47,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-03-20 17:56:47,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=22050, Unknown=0, NotChecked=0, Total=22350 [2022-03-20 17:56:47,321 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 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) [2022-03-20 17:57:01,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:01,953 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2022-03-20 17:57:01,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-03-20 17:57:01,954 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 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 [2022-03-20 17:57:01,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:01,955 INFO L225 Difference]: With dead ends: 162 [2022-03-20 17:57:01,955 INFO L226 Difference]: Without dead ends: 157 [2022-03-20 17:57:01,958 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10733 ImplicationChecksByTransitivity, 17.2s TimeCoverageRelationStatistics Valid=880, Invalid=85262, Unknown=0, NotChecked=0, Total=86142 [2022-03-20 17:57:01,958 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 21753 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 738 SdHoareTripleChecker+Invalid, 21898 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 21753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:01,958 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 738 Invalid, 21898 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 21753 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-03-20 17:57:01,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-03-20 17:57:01,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 157. [2022-03-20 17:57:01,964 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) [2022-03-20 17:57:01,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2022-03-20 17:57:01,965 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2022-03-20 17:57:01,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:01,965 INFO L478 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2022-03-20 17:57:01,965 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.0067114093959733) internal successors, (150), 147 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) [2022-03-20 17:57:01,965 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2022-03-20 17:57:01,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-03-20 17:57:01,966 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:01,966 INFO L499 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:01,966 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-03-20 17:57:01,966 INFO L403 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:01,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:01,966 INFO L85 PathProgramCache]: Analyzing trace with hash 9115430, now seen corresponding path program 72 times [2022-03-20 17:57:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:01,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [300029109] [2022-03-20 17:57:02,090 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:57:02,090 INFO L85 PathProgramCache]: Analyzing trace with hash 1957654536, now seen corresponding path program 1 times [2022-03-20 17:57:02,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:02,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875981002] [2022-03-20 17:57:02,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:02,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:02,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:02,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:02,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:02,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:02,147 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:02,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875981002] [2022-03-20 17:57:02,147 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875981002] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:02,147 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:02,148 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:57:10,901 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:10,901 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [300029109] [2022-03-20 17:57:10,902 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [300029109] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:10,902 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:10,902 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-03-20 17:57:10,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958635375] [2022-03-20 17:57:10,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:10,902 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-03-20 17:57:10,902 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:10,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-03-20 17:57:10,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=22648, Unknown=0, NotChecked=0, Total=22952 [2022-03-20 17:57:10,903 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 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) [2022-03-20 17:57:25,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:25,890 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2022-03-20 17:57:25,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-03-20 17:57:25,891 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 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 [2022-03-20 17:57:25,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:25,892 INFO L225 Difference]: With dead ends: 164 [2022-03-20 17:57:25,892 INFO L226 Difference]: Without dead ends: 159 [2022-03-20 17:57:25,895 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11028 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=892, Invalid=87614, Unknown=0, NotChecked=0, Total=88506 [2022-03-20 17:57:25,895 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 737 mSDsCounter, 0 mSdLazyCounter, 22347 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 748 SdHoareTripleChecker+Invalid, 22494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 22347 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:25,895 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 748 Invalid, 22494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 22347 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-03-20 17:57:25,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2022-03-20 17:57:25,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2022-03-20 17:57:25,901 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) [2022-03-20 17:57:25,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2022-03-20 17:57:25,902 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2022-03-20 17:57:25,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:25,902 INFO L478 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2022-03-20 17:57:25,902 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.0066225165562914) internal successors, (152), 149 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) [2022-03-20 17:57:25,902 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2022-03-20 17:57:25,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-03-20 17:57:25,903 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:25,903 INFO L499 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:25,903 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-03-20 17:57:25,903 INFO L403 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:25,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:25,903 INFO L85 PathProgramCache]: Analyzing trace with hash 1301541508, now seen corresponding path program 73 times [2022-03-20 17:57:25,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:25,903 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1111781638] [2022-03-20 17:57:26,051 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:57:26,052 INFO L85 PathProgramCache]: Analyzing trace with hash 2016759880, now seen corresponding path program 1 times [2022-03-20 17:57:26,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:26,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773126550] [2022-03-20 17:57:26,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:26,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:26,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:26,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:26,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:26,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:26,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773126550] [2022-03-20 17:57:26,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773126550] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:26,097 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:26,097 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:57:35,408 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:57:35,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1111781638] [2022-03-20 17:57:35,408 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1111781638] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:35,408 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:35,408 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-03-20 17:57:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89795141] [2022-03-20 17:57:35,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:57:35,409 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-03-20 17:57:35,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-03-20 17:57:35,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=23254, Unknown=0, NotChecked=0, Total=23562 [2022-03-20 17:57:35,410 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 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) [2022-03-20 17:57:50,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:57:50,791 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2022-03-20 17:57:50,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-03-20 17:57:50,791 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 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 [2022-03-20 17:57:50,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:57:50,792 INFO L225 Difference]: With dead ends: 166 [2022-03-20 17:57:50,792 INFO L226 Difference]: Without dead ends: 161 [2022-03-20 17:57:50,795 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11327 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=904, Invalid=89998, Unknown=0, NotChecked=0, Total=90902 [2022-03-20 17:57:50,796 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 22949 mSolverCounterSat, 149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 758 SdHoareTripleChecker+Invalid, 23098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 149 IncrementalHoareTripleChecker+Valid, 22949 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-03-20 17:57:50,796 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 758 Invalid, 23098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [149 Valid, 22949 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-03-20 17:57:50,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-03-20 17:57:50,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-03-20 17:57:50,802 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) [2022-03-20 17:57:50,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2022-03-20 17:57:50,802 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2022-03-20 17:57:50,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:57:50,803 INFO L478 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2022-03-20 17:57:50,803 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.0065359477124183) internal successors, (154), 151 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) [2022-03-20 17:57:50,803 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2022-03-20 17:57:50,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-03-20 17:57:50,803 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:57:50,803 INFO L499 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:57:50,803 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-03-20 17:57:50,803 INFO L403 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:57:50,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:57:50,804 INFO L85 PathProgramCache]: Analyzing trace with hash 2077453922, now seen corresponding path program 74 times [2022-03-20 17:57:50,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:57:50,804 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [189060241] [2022-03-20 17:57:50,926 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:57:50,927 INFO L85 PathProgramCache]: Analyzing trace with hash 2075865224, now seen corresponding path program 1 times [2022-03-20 17:57:50,927 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:57:50,927 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738786177] [2022-03-20 17:57:50,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:57:50,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:57:50,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:51,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:57:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:57:51,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:57:51,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:57:51,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738786177] [2022-03-20 17:57:51,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738786177] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:57:51,006 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:57:51,006 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:58:00,443 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:00,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [189060241] [2022-03-20 17:58:00,443 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [189060241] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:00,443 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:00,444 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-03-20 17:58:00,444 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000223076] [2022-03-20 17:58:00,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:00,444 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-03-20 17:58:00,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:00,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-03-20 17:58:00,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=312, Invalid=23868, Unknown=0, NotChecked=0, Total=24180 [2022-03-20 17:58:00,445 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 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) [2022-03-20 17:58:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:16,360 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2022-03-20 17:58:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-03-20 17:58:16,361 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 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 [2022-03-20 17:58:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:16,361 INFO L225 Difference]: With dead ends: 168 [2022-03-20 17:58:16,362 INFO L226 Difference]: Without dead ends: 163 [2022-03-20 17:58:16,365 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11630 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=916, Invalid=92414, Unknown=0, NotChecked=0, Total=93330 [2022-03-20 17:58:16,365 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 23712 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 23863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 23712 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:16,365 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 773 Invalid, 23863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 23712 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-03-20 17:58:16,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-03-20 17:58:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 163. [2022-03-20 17:58:16,372 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) [2022-03-20 17:58:16,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2022-03-20 17:58:16,372 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2022-03-20 17:58:16,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:16,372 INFO L478 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2022-03-20 17:58:16,373 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.0064516129032257) internal successors, (156), 153 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) [2022-03-20 17:58:16,373 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2022-03-20 17:58:16,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-03-20 17:58:16,373 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:16,373 INFO L499 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:16,373 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-03-20 17:58:16,373 INFO L403 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:16,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:16,374 INFO L85 PathProgramCache]: Analyzing trace with hash 404974272, now seen corresponding path program 75 times [2022-03-20 17:58:16,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:16,374 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [345137778] [2022-03-20 17:58:16,467 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:58:16,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2134970568, now seen corresponding path program 1 times [2022-03-20 17:58:16,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:16,468 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119816089] [2022-03-20 17:58:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:16,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:16,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:16,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:16,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:16,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:58:16,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:16,513 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119816089] [2022-03-20 17:58:16,513 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119816089] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:16,513 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:16,513 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-03-20 17:58:26,188 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:26,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [345137778] [2022-03-20 17:58:26,188 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [345137778] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:26,188 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:26,188 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-03-20 17:58:26,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003502974] [2022-03-20 17:58:26,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:26,189 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-03-20 17:58:26,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:26,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-03-20 17:58:26,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=24490, Unknown=0, NotChecked=0, Total=24806 [2022-03-20 17:58:26,190 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 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) [2022-03-20 17:58:42,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-03-20 17:58:42,956 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2022-03-20 17:58:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-03-20 17:58:42,957 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 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 [2022-03-20 17:58:42,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-03-20 17:58:42,957 INFO L225 Difference]: With dead ends: 170 [2022-03-20 17:58:42,957 INFO L226 Difference]: Without dead ends: 165 [2022-03-20 17:58:42,960 INFO L912 BasicCegarLoop]: 0 DeclaredPredicates, 315 GetRequests, 4 SyntacticMatches, 3 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11937 ImplicationChecksByTransitivity, 19.5s TimeCoverageRelationStatistics Valid=928, Invalid=94862, Unknown=0, NotChecked=0, Total=95790 [2022-03-20 17:58:42,961 INFO L913 BasicCegarLoop]: 11 mSDtfsCounter, 11 mSDsluCounter, 772 mSDsCounter, 0 mSdLazyCounter, 24332 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 783 SdHoareTripleChecker+Invalid, 24485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 24332 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-03-20 17:58:42,961 INFO L914 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 783 Invalid, 24485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 24332 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-03-20 17:58:42,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-03-20 17:58:42,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-03-20 17:58:42,967 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) [2022-03-20 17:58:42,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2022-03-20 17:58:42,968 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2022-03-20 17:58:42,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-03-20 17:58:42,968 INFO L478 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2022-03-20 17:58:42,968 INFO L479 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.0063694267515924) internal successors, (158), 155 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) [2022-03-20 17:58:42,968 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2022-03-20 17:58:42,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-03-20 17:58:42,969 INFO L491 BasicCegarLoop]: Found error trace [2022-03-20 17:58:42,969 INFO L499 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-03-20 17:58:42,969 WARN L460 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-03-20 17:58:42,969 INFO L403 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-03-20 17:58:42,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-03-20 17:58:42,969 INFO L85 PathProgramCache]: Analyzing trace with hash -530200674, now seen corresponding path program 76 times [2022-03-20 17:58:42,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:42,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleAcceleratedInterpolation [1882289579] [2022-03-20 17:58:43,061 INFO L271 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-03-20 17:58:43,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2100891384, now seen corresponding path program 1 times [2022-03-20 17:58:43,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-03-20 17:58:43,062 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358727910] [2022-03-20 17:58:43,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-03-20 17:58:43,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-03-20 17:58:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:43,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-03-20 17:58:43,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-03-20 17:58:43,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-03-20 17:58:43,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-03-20 17:58:43,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358727910] [2022-03-20 17:58:43,108 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358727910] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:43,108 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:43,108 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-03-20 17:58:52,964 INFO L136 FreeRefinementEngine]: Strategy ACCELERATED_INTERPOLATION found an infeasible trace [2022-03-20 17:58:52,964 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAcceleratedInterpolation [1882289579] [2022-03-20 17:58:52,964 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleAcceleratedInterpolation [1882289579] provided 1 perfect and 0 imperfect interpolant sequences [2022-03-20 17:58:52,964 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-03-20 17:58:52,964 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-03-20 17:58:52,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010497197] [2022-03-20 17:58:52,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-03-20 17:58:52,965 INFO L554 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-03-20 17:58:52,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy ACCELERATED_INTERPOLATION [2022-03-20 17:58:52,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-03-20 17:58:52,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=24806, Unknown=0, NotChecked=0, Total=25122 [2022-03-20 17:58:52,966 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 159 states, 159 states have (on average 1.0062893081761006) internal successors, (160), 157 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)