/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:59:34,873 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:59:34,874 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:59:34,897 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-02-15 01:59:34,897 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-02-15 01:59:34,901 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-02-15 01:59:34,904 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-02-15 01:59:34,908 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-02-15 01:59:34,909 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-02-15 01:59:34,914 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-02-15 01:59:34,914 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-02-15 01:59:34,915 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-02-15 01:59:34,915 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-02-15 01:59:34,915 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-02-15 01:59:34,916 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-02-15 01:59:34,916 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-02-15 01:59:34,917 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-02-15 01:59:34,917 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-02-15 01:59:34,918 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-02-15 01:59:34,919 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-02-15 01:59:34,920 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-02-15 01:59:34,922 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-02-15 01:59:34,923 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-02-15 01:59:34,924 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-02-15 01:59:34,930 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-02-15 01:59:34,930 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-02-15 01:59:34,931 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-02-15 01:59:34,931 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-02-15 01:59:34,932 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-02-15 01:59:34,932 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-02-15 01:59:34,933 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-02-15 01:59:34,933 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-02-15 01:59:34,934 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-02-15 01:59:34,935 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-02-15 01:59:34,936 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-02-15 01:59:34,936 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-02-15 01:59:34,936 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-02-15 01:59:34,936 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-02-15 01:59:34,936 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:59:34,937 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:59:34,937 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:59:34,938 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:59:34,948 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:59:34,948 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:59:34,949 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:59:34,949 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:59:34,949 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:59:34,949 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:59:34,949 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:59:34,950 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:59:34,951 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:59:34,951 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:59:34,951 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:59:34,951 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:59:35,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:59:35,162 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:59:35,164 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:59:35,165 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:59:35,165 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:59:35,166 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-15 01:59:35,212 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c182356/421f21e55bea4d02a37b5693e9fbda1a/FLAGb586cee97 [2022-02-15 01:59:35,516 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:59:35,516 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_14.c [2022-02-15 01:59:35,520 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c182356/421f21e55bea4d02a37b5693e9fbda1a/FLAGb586cee97 [2022-02-15 01:59:35,956 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/11c182356/421f21e55bea4d02a37b5693e9fbda1a [2022-02-15 01:59:35,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:59:35,959 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:59:35,960 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:59:35,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:59:35,962 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:59:35,963 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:59:35" (1/1) ... [2022-02-15 01:59:35,964 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5284cca0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:35, skipping insertion in model container [2022-02-15 01:59:35,964 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:59:35" (1/1) ... [2022-02-15 01:59:35,971 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:59:35,979 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:59:36,114 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-crafted-1/mono-crafted_14.c[319,332] [2022-02-15 01:59:36,138 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:59:36,143 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:59:36,149 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-crafted-1/mono-crafted_14.c[319,332] [2022-02-15 01:59:36,152 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:59:36,159 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:59:36,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36 WrapperNode [2022-02-15 01:59:36,160 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:59:36,160 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:59:36,160 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:59:36,161 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:59:36,167 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,167 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,171 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,171 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,174 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,176 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,178 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,178 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:59:36,179 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:59:36,179 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:59:36,179 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:59:36,180 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (1/1) ... [2022-02-15 01:59:36,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:59:36,191 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:59:36,200 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) [2022-02-15 01:59:36,214 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 [2022-02-15 01:59:36,236 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:59:36,237 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:59:36,237 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:59:36,237 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:59:36,237 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:59:36,237 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:59:36,237 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:59:36,238 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:59:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:59:36,239 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:59:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:59:36,240 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:59:36,285 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:59:36,286 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:59:36,401 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:59:36,405 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:59:36,405 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:59:36,406 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:59:36 BoogieIcfgContainer [2022-02-15 01:59:36,406 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:59:36,407 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:59:36,407 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:59:36,432 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:59:36,432 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:59:35" (1/3) ... [2022-02-15 01:59:36,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5646bc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:59:36, skipping insertion in model container [2022-02-15 01:59:36,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:59:36" (2/3) ... [2022-02-15 01:59:36,433 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5646bc43 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:59:36, skipping insertion in model container [2022-02-15 01:59:36,433 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:59:36" (3/3) ... [2022-02-15 01:59:36,434 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2022-02-15 01:59:36,437 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:59:36,437 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:59:36,464 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:59:36,468 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, 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, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:59:36,468 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:59:36,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-02-15 01:59:36,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:59:36,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:36,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:36,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:36,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:36,485 INFO L85 PathProgramCache]: Analyzing trace with hash -1104150160, now seen corresponding path program 1 times [2022-02-15 01:59:36,490 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:36,490 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1412357587] [2022-02-15 01:59:36,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:36,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:36,533 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:36,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:36,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:36,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:36,635 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:36,636 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1412357587] [2022-02-15 01:59:36,637 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1412357587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:36,638 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:36,638 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:59:36,639 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469999140] [2022-02-15 01:59:36,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:36,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:59:36,642 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:36,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:59:36,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:59:36,665 INFO L87 Difference]: Start difference. First operand has 22 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:36,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:36,709 INFO L93 Difference]: Finished difference Result 36 states and 47 transitions. [2022-02-15 01:59:36,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:59:36,711 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 01:59:36,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:36,720 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:59:36,721 INFO L226 Difference]: Without dead ends: 17 [2022-02-15 01:59:36,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:59:36,726 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:36,727 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 26 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:59:36,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-15 01:59:36,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-15 01:59:36,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2022-02-15 01:59:36,761 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 12 [2022-02-15 01:59:36,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:36,762 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2022-02-15 01:59:36,762 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:36,762 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2022-02-15 01:59:36,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-15 01:59:36,763 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:36,763 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:36,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:59:36,764 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1394135754, now seen corresponding path program 1 times [2022-02-15 01:59:36,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:36,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954034019] [2022-02-15 01:59:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:36,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:36,770 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:59:36,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:36,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:36,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:36,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:36,840 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:36,840 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954034019] [2022-02-15 01:59:36,840 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954034019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:36,841 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:36,841 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:59:36,841 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264069752] [2022-02-15 01:59:36,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:36,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:59:36,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:59:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:59:36,844 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:36,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:36,884 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2022-02-15 01:59:36,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:59:36,885 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-15 01:59:36,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:36,887 INFO L225 Difference]: With dead ends: 30 [2022-02-15 01:59:36,887 INFO L226 Difference]: Without dead ends: 19 [2022-02-15 01:59:36,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:59:36,892 INFO L933 BasicCegarLoop]: 17 mSDtfsCounter, 14 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:36,892 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:59:36,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2022-02-15 01:59:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2022-02-15 01:59:36,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2022-02-15 01:59:36,902 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 12 [2022-02-15 01:59:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:36,903 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2022-02-15 01:59:36,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2022-02-15 01:59:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:59:36,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:36,904 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:36,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:59:36,904 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:36,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:36,905 INFO L85 PathProgramCache]: Analyzing trace with hash 479542393, now seen corresponding path program 1 times [2022-02-15 01:59:36,906 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:36,906 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1744621446] [2022-02-15 01:59:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:37,015 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,016 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:59:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:37,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:37,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:37,084 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:37,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1744621446] [2022-02-15 01:59:37,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1744621446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:37,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:37,084 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:59:37,084 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149745138] [2022-02-15 01:59:37,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:37,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:59:37,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:37,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:59:37,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:59:37,086 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-15 01:59:37,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:37,157 INFO L93 Difference]: Finished difference Result 32 states and 40 transitions. [2022-02-15 01:59:37,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:59:37,157 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-02-15 01:59:37,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:37,158 INFO L225 Difference]: With dead ends: 32 [2022-02-15 01:59:37,158 INFO L226 Difference]: Without dead ends: 23 [2022-02-15 01:59:37,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:59:37,159 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 17 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:37,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [18 Valid, 27 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:59:37,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-15 01:59:37,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2022-02-15 01:59:37,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 16 states have (on average 1.3125) internal successors, (21), 17 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:37,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-02-15 01:59:37,163 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 14 [2022-02-15 01:59:37,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:37,164 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-02-15 01:59:37,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-15 01:59:37,164 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-02-15 01:59:37,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:59:37,164 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:37,164 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:37,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:59:37,165 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:37,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:37,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1190018304, now seen corresponding path program 1 times [2022-02-15 01:59:37,165 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:37,165 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22934777] [2022-02-15 01:59:37,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:37,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,337 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,338 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:37,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,471 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:37,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:37,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:37,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:37,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:37,717 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22934777] [2022-02-15 01:59:37,717 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [22934777] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:37,717 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:37,717 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:59:37,717 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748181400] [2022-02-15 01:59:37,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:37,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:59:37,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:37,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:59:37,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:59:37,718 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:37,831 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2022-02-15 01:59:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:59:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 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 19 [2022-02-15 01:59:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:37,832 INFO L225 Difference]: With dead ends: 45 [2022-02-15 01:59:37,832 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:59:37,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:59:37,833 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 26 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:37,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 22 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:37,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:59:37,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-15 01:59:37,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 24 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 35 transitions. [2022-02-15 01:59:37,837 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 35 transitions. Word has length 19 [2022-02-15 01:59:37,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:37,838 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 35 transitions. [2022-02-15 01:59:37,838 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:37,838 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 35 transitions. [2022-02-15 01:59:37,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:59:37,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:37,838 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:37,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:59:37,839 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:37,839 INFO L85 PathProgramCache]: Analyzing trace with hash -95096280, now seen corresponding path program 2 times [2022-02-15 01:59:37,839 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:37,839 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1459821477] [2022-02-15 01:59:37,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:37,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,924 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:37,924 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:37,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,026 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:38,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:38,161 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:38,161 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1459821477] [2022-02-15 01:59:38,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1459821477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:38,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:38,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:59:38,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831595067] [2022-02-15 01:59:38,163 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:38,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:59:38,163 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:38,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:59:38,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:59:38,164 INFO L87 Difference]: Start difference. First operand 30 states and 35 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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) [2022-02-15 01:59:38,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:38,266 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-02-15 01:59:38,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:59:38,270 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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 [2022-02-15 01:59:38,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:38,270 INFO L225 Difference]: With dead ends: 53 [2022-02-15 01:59:38,275 INFO L226 Difference]: Without dead ends: 37 [2022-02-15 01:59:38,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=117, Invalid=225, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:59:38,277 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:38,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 27 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:59:38,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-15 01:59:38,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 31. [2022-02-15 01:59:38,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:38,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 35 transitions. [2022-02-15 01:59:38,281 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 35 transitions. Word has length 22 [2022-02-15 01:59:38,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:38,282 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 35 transitions. [2022-02-15 01:59:38,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 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) [2022-02-15 01:59:38,282 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 35 transitions. [2022-02-15 01:59:38,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:59:38,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:38,282 INFO L514 BasicCegarLoop]: trace histogram [6, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:38,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:59:38,283 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:38,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:38,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1185944271, now seen corresponding path program 3 times [2022-02-15 01:59:38,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:38,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630226353] [2022-02-15 01:59:38,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:38,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,442 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,442 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:38,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:38,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:38,564 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:38,564 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630226353] [2022-02-15 01:59:38,564 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [630226353] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:38,564 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:38,564 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:59:38,564 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039205447] [2022-02-15 01:59:38,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:38,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:59:38,566 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:38,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:59:38,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=117, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:59:38,567 INFO L87 Difference]: Start difference. First operand 31 states and 35 transitions. Second operand has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:38,723 INFO L93 Difference]: Finished difference Result 59 states and 72 transitions. [2022-02-15 01:59:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:59:38,723 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 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 27 [2022-02-15 01:59:38,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:38,725 INFO L225 Difference]: With dead ends: 59 [2022-02-15 01:59:38,725 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:59:38,726 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=189, Invalid=411, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:59:38,728 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 27 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:38,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 42 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:38,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:59:38,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2022-02-15 01:59:38,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:38,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2022-02-15 01:59:38,739 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 27 [2022-02-15 01:59:38,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:38,739 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2022-02-15 01:59:38,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.6428571428571428) internal successors, (23), 13 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:38,739 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2022-02-15 01:59:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:59:38,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:38,740 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:59:38,740 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash 1945636892, now seen corresponding path program 4 times [2022-02-15 01:59:38,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:38,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717031429] [2022-02-15 01:59:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:38,790 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:38,898 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:38,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:38,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:38,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:39,110 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:39,111 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717031429] [2022-02-15 01:59:39,111 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717031429] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:39,111 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:39,111 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:59:39,111 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941704790] [2022-02-15 01:59:39,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:39,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:59:39,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:39,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:59:39,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:59:39,113 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-02-15 01:59:39,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:39,373 INFO L93 Difference]: Finished difference Result 81 states and 94 transitions. [2022-02-15 01:59:39,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:59:39,374 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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 [2022-02-15 01:59:39,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:39,376 INFO L225 Difference]: With dead ends: 81 [2022-02-15 01:59:39,376 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 01:59:39,376 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 306 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=313, Invalid=809, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:59:39,379 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 62 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:39,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 32 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:39,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 01:59:39,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2022-02-15 01:59:39,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 47 states have internal predecessors, (52), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:39,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 58 transitions. [2022-02-15 01:59:39,393 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 58 transitions. Word has length 32 [2022-02-15 01:59:39,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:39,393 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 58 transitions. [2022-02-15 01:59:39,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.6470588235294117) internal successors, (28), 16 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) [2022-02-15 01:59:39,393 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 58 transitions. [2022-02-15 01:59:39,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:59:39,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:39,395 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:39,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:59:39,396 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:39,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:39,396 INFO L85 PathProgramCache]: Analyzing trace with hash -456266206, now seen corresponding path program 5 times [2022-02-15 01:59:39,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:39,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045143279] [2022-02-15 01:59:39,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:39,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:39,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:39,473 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:39,490 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:39,537 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:39,537 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:39,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:39,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:39,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:39,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:39,717 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:39,718 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045143279] [2022-02-15 01:59:39,718 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045143279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:39,718 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:39,718 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:59:39,718 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260629614] [2022-02-15 01:59:39,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:39,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:59:39,718 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:39,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:59:39,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=223, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:59:39,719 INFO L87 Difference]: Start difference. First operand 53 states and 58 transitions. Second operand has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:39,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:39,996 INFO L93 Difference]: Finished difference Result 89 states and 105 transitions. [2022-02-15 01:59:39,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:59:39,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 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 35 [2022-02-15 01:59:39,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:40,000 INFO L225 Difference]: With dead ends: 89 [2022-02-15 01:59:40,000 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 01:59:40,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=839, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:59:40,001 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 45 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:40,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [46 Valid, 27 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:40,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 01:59:40,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2022-02-15 01:59:40,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 37 states have (on average 1.135135135135135) internal successors, (42), 38 states have internal predecessors, (42), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:40,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 48 transitions. [2022-02-15 01:59:40,013 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 48 transitions. Word has length 35 [2022-02-15 01:59:40,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:40,013 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 48 transitions. [2022-02-15 01:59:40,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.631578947368421) internal successors, (31), 18 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:40,014 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 48 transitions. [2022-02-15 01:59:40,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:59:40,016 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:40,016 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:40,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:59:40,016 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:40,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:40,016 INFO L85 PathProgramCache]: Analyzing trace with hash 950485835, now seen corresponding path program 6 times [2022-02-15 01:59:40,016 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:40,017 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [475810400] [2022-02-15 01:59:40,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:40,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,110 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:40,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,167 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:40,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:40,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:40,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:40,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:40,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:40,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:40,459 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [475810400] [2022-02-15 01:59:40,459 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [475810400] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:40,459 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:40,459 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:59:40,459 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832093783] [2022-02-15 01:59:40,459 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:40,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:59:40,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:40,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:59:40,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:59:40,461 INFO L87 Difference]: Start difference. First operand 44 states and 48 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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) [2022-02-15 01:59:40,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:40,778 INFO L93 Difference]: Finished difference Result 103 states and 116 transitions. [2022-02-15 01:59:40,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:59:40,778 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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 [2022-02-15 01:59:40,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:40,779 INFO L225 Difference]: With dead ends: 103 [2022-02-15 01:59:40,779 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 01:59:40,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=509, Invalid=1383, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:59:40,780 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 50 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:40,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 22 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:40,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 01:59:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-15 01:59:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.1) internal successors, (66), 61 states have internal predecessors, (66), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 72 transitions. [2022-02-15 01:59:40,785 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 72 transitions. Word has length 40 [2022-02-15 01:59:40,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:40,785 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 72 transitions. [2022-02-15 01:59:40,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 21 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) [2022-02-15 01:59:40,785 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 72 transitions. [2022-02-15 01:59:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:59:40,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:40,786 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:40,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:59:40,786 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:40,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:40,786 INFO L85 PathProgramCache]: Analyzing trace with hash 987895251, now seen corresponding path program 7 times [2022-02-15 01:59:40,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:40,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [385128846] [2022-02-15 01:59:40,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:40,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,878 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:40,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,949 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:40,950 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:40,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:40,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:41,211 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:41,211 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [385128846] [2022-02-15 01:59:41,211 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [385128846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:41,211 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:41,211 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:59:41,212 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019614700] [2022-02-15 01:59:41,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:41,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:59:41,212 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:41,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:59:41,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=363, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:59:41,213 INFO L87 Difference]: Start difference. First operand 67 states and 72 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:41,597 INFO L93 Difference]: Finished difference Result 111 states and 127 transitions. [2022-02-15 01:59:41,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:59:41,597 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 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 43 [2022-02-15 01:59:41,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:41,598 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:59:41,598 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:59:41,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=561, Invalid=1419, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:59:41,599 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 81 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:41,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 37 Invalid, 492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:41,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:59:41,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2022-02-15 01:59:41,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 46 states have internal predecessors, (50), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:41,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-02-15 01:59:41,604 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 43 [2022-02-15 01:59:41,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:41,604 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-02-15 01:59:41,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:41,604 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-02-15 01:59:41,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:59:41,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:41,604 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:41,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:59:41,605 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:41,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:41,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1242507194, now seen corresponding path program 8 times [2022-02-15 01:59:41,605 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:41,605 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1364192431] [2022-02-15 01:59:41,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:41,661 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:41,687 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:41,687 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:41,711 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:41,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:41,750 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:41,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:41,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:41,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:42,038 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:42,038 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1364192431] [2022-02-15 01:59:42,038 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1364192431] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:42,038 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:42,038 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:59:42,038 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242550498] [2022-02-15 01:59:42,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:42,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:59:42,039 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:42,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:59:42,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=466, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:59:42,040 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-02-15 01:59:42,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:42,369 INFO L93 Difference]: Finished difference Result 101 states and 114 transitions. [2022-02-15 01:59:42,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:59:42,369 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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 [2022-02-15 01:59:42,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:42,370 INFO L225 Difference]: With dead ends: 101 [2022-02-15 01:59:42,370 INFO L226 Difference]: Without dead ends: 57 [2022-02-15 01:59:42,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 682 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=702, Invalid=1848, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:59:42,371 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 77 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:42,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 32 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:59:42,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-15 01:59:42,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2022-02-15 01:59:42,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 50 states have (on average 1.1) internal successors, (55), 51 states have internal predecessors, (55), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:42,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 61 transitions. [2022-02-15 01:59:42,376 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 61 transitions. Word has length 48 [2022-02-15 01:59:42,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:42,376 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 61 transitions. [2022-02-15 01:59:42,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6296296296296295) internal successors, (44), 26 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) [2022-02-15 01:59:42,376 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 61 transitions. [2022-02-15 01:59:42,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:59:42,377 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:42,377 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:42,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:59:42,377 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:42,377 INFO L85 PathProgramCache]: Analyzing trace with hash 971809375, now seen corresponding path program 9 times [2022-02-15 01:59:42,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:42,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470743561] [2022-02-15 01:59:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:42,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,439 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,439 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:42,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:42,516 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:42,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:42,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:42,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:42,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:42,967 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470743561] [2022-02-15 01:59:42,967 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470743561] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:42,967 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:42,967 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:59:42,967 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624856906] [2022-02-15 01:59:42,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:42,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:59:42,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:42,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:59:42,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=582, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:59:42,968 INFO L87 Difference]: Start difference. First operand 57 states and 61 transitions. Second operand has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:43,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:43,549 INFO L93 Difference]: Finished difference Result 111 states and 124 transitions. [2022-02-15 01:59:43,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:59:43,550 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 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 53 [2022-02-15 01:59:43,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:43,551 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:59:43,551 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:59:43,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=858, Invalid=2334, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:59:43,552 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 65 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 674 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:43,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [66 Valid, 32 Invalid, 674 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:59:43,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:59:43,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2022-02-15 01:59:43,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 56 states have internal predecessors, (60), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:43,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2022-02-15 01:59:43,556 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 53 [2022-02-15 01:59:43,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:43,557 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2022-02-15 01:59:43,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6333333333333333) internal successors, (49), 29 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2022-02-15 01:59:43,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:59:43,557 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:43,557 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:43,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:59:43,558 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:43,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:43,558 INFO L85 PathProgramCache]: Analyzing trace with hash -1045358546, now seen corresponding path program 10 times [2022-02-15 01:59:43,558 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:43,558 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131815769] [2022-02-15 01:59:43,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:43,606 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:43,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:43,630 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:43,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:43,710 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:43,710 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:43,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:43,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:43,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:44,176 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:44,176 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131815769] [2022-02-15 01:59:44,176 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131815769] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:44,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:44,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:59:44,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477233570] [2022-02-15 01:59:44,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:44,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:59:44,178 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:44,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:59:44,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=345, Invalid=711, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:59:44,179 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-02-15 01:59:44,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:44,823 INFO L93 Difference]: Finished difference Result 121 states and 134 transitions. [2022-02-15 01:59:44,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:59:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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 [2022-02-15 01:59:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:44,824 INFO L225 Difference]: With dead ends: 121 [2022-02-15 01:59:44,824 INFO L226 Difference]: Without dead ends: 67 [2022-02-15 01:59:44,825 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1063 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1029, Invalid=2877, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:59:44,826 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 91 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:44,826 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 42 Invalid, 893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:44,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-15 01:59:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2022-02-15 01:59:44,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 60 states have (on average 1.0833333333333333) internal successors, (65), 61 states have internal predecessors, (65), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:44,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 71 transitions. [2022-02-15 01:59:44,830 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 71 transitions. Word has length 58 [2022-02-15 01:59:44,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:44,830 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 71 transitions. [2022-02-15 01:59:44,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6363636363636365) internal successors, (54), 32 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) [2022-02-15 01:59:44,831 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 71 transitions. [2022-02-15 01:59:44,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:59:44,831 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:44,831 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:44,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:59:44,831 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:44,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:44,831 INFO L85 PathProgramCache]: Analyzing trace with hash 1186268395, now seen corresponding path program 11 times [2022-02-15 01:59:44,832 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:44,832 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688747440] [2022-02-15 01:59:44,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:44,889 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:44,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:44,906 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:44,937 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:44,993 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:44,993 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:44,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:45,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:45,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:45,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:45,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688747440] [2022-02-15 01:59:45,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688747440] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:45,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:45,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:59:45,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091284401] [2022-02-15 01:59:45,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:45,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:59:45,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:45,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:59:45,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=407, Invalid=853, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:59:45,435 INFO L87 Difference]: Start difference. First operand 67 states and 71 transitions. Second operand has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:46,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:46,199 INFO L93 Difference]: Finished difference Result 131 states and 144 transitions. [2022-02-15 01:59:46,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:59:46,200 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 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 63 [2022-02-15 01:59:46,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:46,200 INFO L225 Difference]: With dead ends: 131 [2022-02-15 01:59:46,200 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 01:59:46,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1285 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1215, Invalid=3477, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:59:46,202 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 78 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 898 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 1012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 898 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:46,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 32 Invalid, 1012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 898 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:46,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 01:59:46,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-02-15 01:59:46,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 66 states have internal predecessors, (70), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:46,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2022-02-15 01:59:46,206 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 63 [2022-02-15 01:59:46,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:46,206 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2022-02-15 01:59:46,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6388888888888888) internal successors, (59), 35 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:46,206 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2022-02-15 01:59:46,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:59:46,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:46,207 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:46,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:59:46,210 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:46,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:46,211 INFO L85 PathProgramCache]: Analyzing trace with hash -583036254, now seen corresponding path program 12 times [2022-02-15 01:59:46,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:46,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469867885] [2022-02-15 01:59:46,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:46,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:46,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:46,292 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:46,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:46,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:46,356 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:46,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:46,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:46,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:46,859 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:46,859 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469867885] [2022-02-15 01:59:46,859 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [469867885] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:46,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:46,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 01:59:46,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390605032] [2022-02-15 01:59:46,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:46,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 01:59:46,870 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:46,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 01:59:46,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=474, Invalid=1008, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:59:46,871 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 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) [2022-02-15 01:59:47,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:47,626 INFO L93 Difference]: Finished difference Result 141 states and 154 transitions. [2022-02-15 01:59:47,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:59:47,627 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 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 [2022-02-15 01:59:47,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:47,627 INFO L225 Difference]: With dead ends: 141 [2022-02-15 01:59:47,627 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 01:59:47,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1416, Invalid=4134, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:59:47,629 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 108 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1071 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 1071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:47,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 37 Invalid, 1170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 1071 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:59:47,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 01:59:47,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2022-02-15 01:59:47,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 70 states have (on average 1.0714285714285714) internal successors, (75), 71 states have internal predecessors, (75), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:47,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 81 transitions. [2022-02-15 01:59:47,634 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 81 transitions. Word has length 68 [2022-02-15 01:59:47,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:47,634 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 81 transitions. [2022-02-15 01:59:47,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 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) [2022-02-15 01:59:47,634 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 81 transitions. [2022-02-15 01:59:47,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:59:47,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:47,635 INFO L514 BasicCegarLoop]: trace histogram [24, 23, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:47,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:59:47,635 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:47,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:47,640 INFO L85 PathProgramCache]: Analyzing trace with hash 402029943, now seen corresponding path program 13 times [2022-02-15 01:59:47,640 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:47,640 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [848195533] [2022-02-15 01:59:47,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:47,685 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:47,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:47,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:47,734 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:47,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:47,792 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:47,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:47,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:48,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:48,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [848195533] [2022-02-15 01:59:48,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [848195533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:48,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:48,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:59:48,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773890486] [2022-02-15 01:59:48,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:48,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:59:48,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:48,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:59:48,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=546, Invalid=1176, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:59:48,344 INFO L87 Difference]: Start difference. First operand 77 states and 81 transitions. Second operand has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:49,409 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2022-02-15 01:59:49,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:59:49,409 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 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 73 [2022-02-15 01:59:49,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:49,410 INFO L225 Difference]: With dead ends: 151 [2022-02-15 01:59:49,410 INFO L226 Difference]: Without dead ends: 82 [2022-02-15 01:59:49,411 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1792 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1632, Invalid=4848, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:59:49,412 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 134 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 134 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:49,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 37 Invalid, 1407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [134 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:59:49,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-15 01:59:49,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-15 01:59:49,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 76 states have internal predecessors, (80), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:49,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-02-15 01:59:49,417 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 73 [2022-02-15 01:59:49,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:49,417 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-02-15 01:59:49,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6428571428571428) internal successors, (69), 41 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:49,418 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-02-15 01:59:49,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 01:59:49,418 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:49,418 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:49,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:59:49,418 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:49,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1314871062, now seen corresponding path program 14 times [2022-02-15 01:59:49,419 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:49,419 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830344460] [2022-02-15 01:59:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:49,465 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,484 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,484 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:49,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:49,561 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:49,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:49,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:49,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:49,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:49,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:50,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:50,073 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830344460] [2022-02-15 01:59:50,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830344460] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:50,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:50,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:59:50,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753991938] [2022-02-15 01:59:50,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:50,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:59:50,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:50,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:59:50,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:59:50,075 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 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) [2022-02-15 01:59:50,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:50,950 INFO L93 Difference]: Finished difference Result 161 states and 174 transitions. [2022-02-15 01:59:50,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:59:50,951 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 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 [2022-02-15 01:59:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:50,952 INFO L225 Difference]: With dead ends: 161 [2022-02-15 01:59:50,953 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 01:59:50,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1863, Invalid=5619, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:59:50,957 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 210 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1494 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 1696 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:50,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 42 Invalid, 1696 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:59:50,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 01:59:50,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2022-02-15 01:59:50,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 80 states have (on average 1.0625) internal successors, (85), 81 states have internal predecessors, (85), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:50,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 91 transitions. [2022-02-15 01:59:50,968 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 91 transitions. Word has length 78 [2022-02-15 01:59:50,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:50,969 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 91 transitions. [2022-02-15 01:59:50,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6444444444444444) internal successors, (74), 44 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) [2022-02-15 01:59:50,969 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 91 transitions. [2022-02-15 01:59:50,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:59:50,971 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:50,972 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:50,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:59:50,972 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:50,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:50,972 INFO L85 PathProgramCache]: Analyzing trace with hash 2058112003, now seen corresponding path program 15 times [2022-02-15 01:59:50,973 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:50,973 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116504137] [2022-02-15 01:59:50,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:51,026 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:51,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:51,047 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:51,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:51,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:51,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:51,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:51,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:51,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:51,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:51,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:51,743 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:51,743 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116504137] [2022-02-15 01:59:51,743 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116504137] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:51,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:51,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:59:51,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343389880] [2022-02-15 01:59:51,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:51,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:59:51,744 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:51,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:59:51,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=779, Invalid=1771, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:59:51,745 INFO L87 Difference]: Start difference. First operand 87 states and 91 transitions. Second operand has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:53,158 INFO L93 Difference]: Finished difference Result 223 states and 236 transitions. [2022-02-15 01:59:53,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:59:53,158 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 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 83 [2022-02-15 01:59:53,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:53,159 INFO L225 Difference]: With dead ends: 223 [2022-02-15 01:59:53,159 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 01:59:53,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2188, Invalid=6932, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 01:59:53,161 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 132 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1829 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:53,161 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 37 Invalid, 1975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1829 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:59:53,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 01:59:53,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-02-15 01:59:53,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 137 states have (on average 1.0437956204379562) internal successors, (143), 138 states have internal predecessors, (143), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:53,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 149 transitions. [2022-02-15 01:59:53,168 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 149 transitions. Word has length 83 [2022-02-15 01:59:53,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:53,168 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 149 transitions. [2022-02-15 01:59:53,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6458333333333333) internal successors, (79), 47 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:53,168 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 149 transitions. [2022-02-15 01:59:53,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:59:53,169 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:53,169 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:53,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:59:53,169 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:53,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:53,169 INFO L85 PathProgramCache]: Analyzing trace with hash 450814341, now seen corresponding path program 16 times [2022-02-15 01:59:53,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:53,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [74707204] [2022-02-15 01:59:53,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:53,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,244 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,244 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:53,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:53,303 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:53,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:53,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:53,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:53,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:54,029 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:54,029 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [74707204] [2022-02-15 01:59:54,029 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [74707204] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:54,029 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:54,029 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:59:54,029 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800455064] [2022-02-15 01:59:54,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:54,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:59:54,029 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:54,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:59:54,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=772, Invalid=1678, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:59:54,030 INFO L87 Difference]: Start difference. First operand 144 states and 149 transitions. Second operand has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 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) [2022-02-15 01:59:55,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:55,525 INFO L93 Difference]: Finished difference Result 231 states and 247 transitions. [2022-02-15 01:59:55,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:59:55,526 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 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 [2022-02-15 01:59:55,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:55,526 INFO L225 Difference]: With dead ends: 231 [2022-02-15 01:59:55,527 INFO L226 Difference]: Without dead ends: 151 [2022-02-15 01:59:55,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2614 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2310, Invalid=7002, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:59:55,528 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 169 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1805 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 1963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 1805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:55,528 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 37 Invalid, 1963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 1805 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:59:55,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-15 01:59:55,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 95. [2022-02-15 01:59:55,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 88 states have (on average 1.0568181818181819) internal successors, (93), 89 states have internal predecessors, (93), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 99 transitions. [2022-02-15 01:59:55,533 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 99 transitions. Word has length 86 [2022-02-15 01:59:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 99 transitions. [2022-02-15 01:59:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.64) internal successors, (82), 49 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) [2022-02-15 01:59:55,533 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 99 transitions. [2022-02-15 01:59:55,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 01:59:55,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:55,534 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:55,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:59:55,534 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:55,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:55,534 INFO L85 PathProgramCache]: Analyzing trace with hash 366295412, now seen corresponding path program 17 times [2022-02-15 01:59:55,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:55,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294754448] [2022-02-15 01:59:55,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:55,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:55,600 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:55,601 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:55,619 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:55,659 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:55,659 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:55,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:55,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:55,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:55,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:55,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:56,455 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:56,455 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294754448] [2022-02-15 01:59:56,455 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294754448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:56,455 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:56,455 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:59:56,455 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818122195] [2022-02-15 01:59:56,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:56,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:59:56,456 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:56,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:59:56,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=1893, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:59:56,457 INFO L87 Difference]: Start difference. First operand 95 states and 99 transitions. Second operand has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:58,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:59:58,059 INFO L93 Difference]: Finished difference Result 187 states and 200 transitions. [2022-02-15 01:59:58,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:59:58,060 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 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 91 [2022-02-15 01:59:58,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:59:58,060 INFO L225 Difference]: With dead ends: 187 [2022-02-15 01:59:58,060 INFO L226 Difference]: Without dead ends: 100 [2022-02-15 01:59:58,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2956 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2583, Invalid=7923, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:59:58,062 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 145 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2070 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 2070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:59:58,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 37 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 2070 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:59:58,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-15 01:59:58,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-15 01:59:58,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 93 states have (on average 1.053763440860215) internal successors, (98), 94 states have internal predecessors, (98), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:59:58,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-02-15 01:59:58,070 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2022-02-15 01:59:58,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:59:58,070 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-02-15 01:59:58,071 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6415094339622642) internal successors, (87), 52 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:59:58,071 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-02-15 01:59:58,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-15 01:59:58,073 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:59:58,073 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:59:58,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:59:58,073 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:59:58,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:59:58,074 INFO L85 PathProgramCache]: Analyzing trace with hash 2057108537, now seen corresponding path program 18 times [2022-02-15 01:59:58,074 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:59:58,074 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1174014133] [2022-02-15 01:59:58,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:59:58,147 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:58,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:58,171 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:58,200 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:58,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:59:58,240 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:59:58,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:59:58,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:58,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:59:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:59:58,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:59:59,096 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:59:59,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1174014133] [2022-02-15 01:59:59,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1174014133] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:59:59,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:59:59,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:59:59,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649303336] [2022-02-15 01:59:59,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:59:59,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:59:59,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:59:59,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:59:59,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=959, Invalid=2121, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:59:59,098 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 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) [2022-02-15 02:00:00,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:00,298 INFO L93 Difference]: Finished difference Result 197 states and 210 transitions. [2022-02-15 02:00:00,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 02:00:00,299 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 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 [2022-02-15 02:00:00,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:00,300 INFO L225 Difference]: With dead ends: 197 [2022-02-15 02:00:00,300 INFO L226 Difference]: Without dead ends: 105 [2022-02-15 02:00:00,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3319 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2871, Invalid=8901, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 02:00:00,304 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 153 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2304 mSolverCounterSat, 209 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 209 IncrementalHoareTripleChecker+Valid, 2304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:00,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 27 Invalid, 2513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [209 Valid, 2304 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 02:00:00,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-15 02:00:00,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-15 02:00:00,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 99 states have internal predecessors, (103), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:00,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 109 transitions. [2022-02-15 02:00:00,317 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 109 transitions. Word has length 96 [2022-02-15 02:00:00,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:00,318 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 109 transitions. [2022-02-15 02:00:00,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6428571428571428) internal successors, (92), 55 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) [2022-02-15 02:00:00,321 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 109 transitions. [2022-02-15 02:00:00,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 02:00:00,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:00,322 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:00,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 02:00:00,322 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:00,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:00,322 INFO L85 PathProgramCache]: Analyzing trace with hash 2133809600, now seen corresponding path program 19 times [2022-02-15 02:00:00,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:00,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081728387] [2022-02-15 02:00:00,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:00,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:00,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:00,373 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:00,390 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:00,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:00,447 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:00,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:00,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:00,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:00,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:01,362 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:01,362 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081728387] [2022-02-15 02:00:01,362 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081728387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:01,362 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:01,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 02:00:01,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528599517] [2022-02-15 02:00:01,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:01,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 02:00:01,363 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:01,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 02:00:01,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1060, Invalid=2362, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 02:00:01,364 INFO L87 Difference]: Start difference. First operand 105 states and 109 transitions. Second operand has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:03,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:03,171 INFO L93 Difference]: Finished difference Result 207 states and 220 transitions. [2022-02-15 02:00:03,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 02:00:03,176 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 states have internal predecessors, (97), 2 states have call successors, (3), 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 101 [2022-02-15 02:00:03,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:03,176 INFO L225 Difference]: With dead ends: 207 [2022-02-15 02:00:03,176 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 02:00:03,179 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3703 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3174, Invalid=9936, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 02:00:03,180 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 161 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 2605 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 2824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:03,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 27 Invalid, 2824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2605 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 02:00:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 02:00:03,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-15 02:00:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 104 states have internal predecessors, (108), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:03,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2022-02-15 02:00:03,186 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 101 [2022-02-15 02:00:03,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:03,186 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2022-02-15 02:00:03,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6440677966101696) internal successors, (97), 58 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:03,186 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2022-02-15 02:00:03,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-02-15 02:00:03,187 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:03,187 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:03,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 02:00:03,187 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:03,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:03,187 INFO L85 PathProgramCache]: Analyzing trace with hash 185389293, now seen corresponding path program 20 times [2022-02-15 02:00:03,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:03,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2087186063] [2022-02-15 02:00:03,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:03,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:03,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:03,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:03,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:03,302 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:03,302 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:03,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:03,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:03,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:03,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:04,037 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:04,037 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2087186063] [2022-02-15 02:00:04,037 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2087186063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:04,037 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:04,037 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 02:00:04,037 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48365704] [2022-02-15 02:00:04,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:04,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 02:00:04,038 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:04,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 02:00:04,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1166, Invalid=2616, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 02:00:04,039 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 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) [2022-02-15 02:00:05,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:05,702 INFO L93 Difference]: Finished difference Result 217 states and 230 transitions. [2022-02-15 02:00:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 02:00:05,702 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 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 [2022-02-15 02:00:05,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:05,703 INFO L225 Difference]: With dead ends: 217 [2022-02-15 02:00:05,703 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 02:00:05,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4108 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3492, Invalid=11028, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:00:05,704 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 247 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2924 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 248 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 2924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:05,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [248 Valid, 42 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 2924 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 02:00:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 02:00:05,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-15 02:00:05,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 108 states have (on average 1.0462962962962963) internal successors, (113), 109 states have internal predecessors, (113), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:05,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 119 transitions. [2022-02-15 02:00:05,709 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 119 transitions. Word has length 106 [2022-02-15 02:00:05,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:05,709 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 119 transitions. [2022-02-15 02:00:05,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6451612903225807) internal successors, (102), 61 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) [2022-02-15 02:00:05,709 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 119 transitions. [2022-02-15 02:00:05,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-15 02:00:05,710 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:05,710 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:05,710 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 02:00:05,710 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:05,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:05,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1453023244, now seen corresponding path program 21 times [2022-02-15 02:00:05,711 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:05,711 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1276143083] [2022-02-15 02:00:05,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:05,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,770 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:05,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,854 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:05,855 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:05,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:06,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:07,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:07,131 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1276143083] [2022-02-15 02:00:07,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1276143083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:07,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:07,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 02:00:07,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270713271] [2022-02-15 02:00:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:07,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 02:00:07,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:07,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 02:00:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1374, Invalid=3182, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 02:00:07,133 INFO L87 Difference]: Start difference. First operand 115 states and 119 transitions. Second operand has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:09,624 INFO L93 Difference]: Finished difference Result 301 states and 314 transitions. [2022-02-15 02:00:09,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 02:00:09,627 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 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 111 [2022-02-15 02:00:09,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:09,628 INFO L225 Difference]: With dead ends: 301 [2022-02-15 02:00:09,628 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 02:00:09,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4899 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3927, Invalid=12843, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 02:00:09,630 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3323 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 3557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 3323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:09,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 42 Invalid, 3557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 3323 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 02:00:09,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 02:00:09,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-02-15 02:00:09,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 187 states have (on average 1.032085561497326) internal successors, (193), 188 states have internal predecessors, (193), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:09,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 199 transitions. [2022-02-15 02:00:09,639 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 199 transitions. Word has length 111 [2022-02-15 02:00:09,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:09,645 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 199 transitions. [2022-02-15 02:00:09,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.646153846153846) internal successors, (107), 64 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:09,645 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 199 transitions. [2022-02-15 02:00:09,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-15 02:00:09,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:09,646 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:09,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 02:00:09,646 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:09,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:09,646 INFO L85 PathProgramCache]: Analyzing trace with hash -1107335908, now seen corresponding path program 22 times [2022-02-15 02:00:09,646 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:09,646 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694631940] [2022-02-15 02:00:09,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:09,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,727 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,728 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:09,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,803 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:09,804 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:09,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:09,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:10,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:10,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:10,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694631940] [2022-02-15 02:00:10,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [694631940] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:10,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:10,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 02:00:10,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793540797] [2022-02-15 02:00:10,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:10,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 02:00:10,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:10,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 02:00:10,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1367, Invalid=3055, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 02:00:10,952 INFO L87 Difference]: Start difference. First operand 194 states and 199 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 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) [2022-02-15 02:00:13,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:13,454 INFO L93 Difference]: Finished difference Result 309 states and 325 transitions. [2022-02-15 02:00:13,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 02:00:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 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 [2022-02-15 02:00:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:13,455 INFO L225 Difference]: With dead ends: 309 [2022-02-15 02:00:13,455 INFO L226 Difference]: Without dead ends: 201 [2022-02-15 02:00:13,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4095, Invalid=12935, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 02:00:13,457 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 307 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3426 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3722 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 3426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:13,457 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 52 Invalid, 3722 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 3426 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:00:13,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2022-02-15 02:00:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 123. [2022-02-15 02:00:13,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 116 states have (on average 1.043103448275862) internal successors, (121), 117 states have internal predecessors, (121), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 127 transitions. [2022-02-15 02:00:13,463 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 127 transitions. Word has length 114 [2022-02-15 02:00:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:13,463 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 127 transitions. [2022-02-15 02:00:13,464 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 66 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) [2022-02-15 02:00:13,464 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 127 transitions. [2022-02-15 02:00:13,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 02:00:13,464 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:13,464 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:13,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 02:00:13,465 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:13,465 INFO L85 PathProgramCache]: Analyzing trace with hash -860914755, now seen corresponding path program 23 times [2022-02-15 02:00:13,465 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:13,465 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767147325] [2022-02-15 02:00:13,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:13,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:13,536 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:13,536 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:13,563 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:13,617 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:13,618 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:13,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:13,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:13,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:13,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:14,911 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:14,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767147325] [2022-02-15 02:00:14,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [767147325] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:14,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:14,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 02:00:14,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750605380] [2022-02-15 02:00:14,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:14,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 02:00:14,912 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 02:00:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=3343, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 02:00:14,914 INFO L87 Difference]: Start difference. First operand 123 states and 127 transitions. Second operand has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:17,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:17,747 INFO L93 Difference]: Finished difference Result 243 states and 256 transitions. [2022-02-15 02:00:17,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 02:00:17,748 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 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 119 [2022-02-15 02:00:17,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:17,749 INFO L225 Difference]: With dead ends: 243 [2022-02-15 02:00:17,749 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 02:00:17,751 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5312 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4455, Invalid=14177, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:00:17,751 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 189 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3691 mSolverCounterSat, 259 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 3950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 259 IncrementalHoareTripleChecker+Valid, 3691 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:17,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [190 Valid, 37 Invalid, 3950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [259 Valid, 3691 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:00:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 02:00:17,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-02-15 02:00:17,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 122 states have internal predecessors, (126), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:17,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2022-02-15 02:00:17,757 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 119 [2022-02-15 02:00:17,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:17,757 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2022-02-15 02:00:17,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.6428571428571428) internal successors, (115), 69 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:17,757 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2022-02-15 02:00:17,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-15 02:00:17,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:17,758 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:17,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 02:00:17,758 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:17,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:17,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1838977040, now seen corresponding path program 24 times [2022-02-15 02:00:17,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:17,764 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496947536] [2022-02-15 02:00:17,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:17,821 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:17,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:17,839 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:17,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:17,895 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:17,896 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:17,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:17,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:18,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:18,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:18,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:19,213 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:19,213 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496947536] [2022-02-15 02:00:19,213 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1496947536] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:19,213 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:19,213 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 02:00:19,213 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869726661] [2022-02-15 02:00:19,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:19,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 02:00:19,214 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:19,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 02:00:19,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1612, Invalid=3644, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 02:00:19,215 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 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) [2022-02-15 02:00:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:21,396 INFO L93 Difference]: Finished difference Result 253 states and 266 transitions. [2022-02-15 02:00:21,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 02:00:21,396 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 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 [2022-02-15 02:00:21,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:21,397 INFO L225 Difference]: With dead ends: 253 [2022-02-15 02:00:21,397 INFO L226 Difference]: Without dead ends: 133 [2022-02-15 02:00:21,399 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5795 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4830, Invalid=15476, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:00:21,399 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 197 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4053 mSolverCounterSat, 270 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 4323 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 270 IncrementalHoareTripleChecker+Valid, 4053 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:21,399 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 42 Invalid, 4323 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [270 Valid, 4053 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 02:00:21,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-02-15 02:00:21,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 133. [2022-02-15 02:00:21,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 126 states have (on average 1.0396825396825398) internal successors, (131), 127 states have internal predecessors, (131), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:21,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 137 transitions. [2022-02-15 02:00:21,410 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 137 transitions. Word has length 124 [2022-02-15 02:00:21,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:21,410 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 137 transitions. [2022-02-15 02:00:21,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.643835616438356) internal successors, (120), 72 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) [2022-02-15 02:00:21,411 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 137 transitions. [2022-02-15 02:00:21,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-15 02:00:21,412 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:21,412 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:21,412 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 02:00:21,412 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:21,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash 729863113, now seen corresponding path program 25 times [2022-02-15 02:00:21,413 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:21,413 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2042642262] [2022-02-15 02:00:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:21,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,469 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:21,486 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,528 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:21,528 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:21,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:21,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:21,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:21,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:22,820 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:22,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2042642262] [2022-02-15 02:00:22,821 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2042642262] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:22,821 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:22,821 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 02:00:22,821 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059170827] [2022-02-15 02:00:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:22,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 02:00:22,821 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:22,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 02:00:22,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1742, Invalid=3958, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 02:00:22,840 INFO L87 Difference]: Start difference. First operand 133 states and 137 transitions. Second operand has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:25,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:25,091 INFO L93 Difference]: Finished difference Result 263 states and 276 transitions. [2022-02-15 02:00:25,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 02:00:25,092 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 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 129 [2022-02-15 02:00:25,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:25,093 INFO L225 Difference]: With dead ends: 263 [2022-02-15 02:00:25,093 INFO L226 Difference]: Without dead ends: 138 [2022-02-15 02:00:25,095 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6299 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5220, Invalid=16832, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:00:25,095 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 352 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 4450 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 4637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 4450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:25,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 57 Invalid, 4637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 4450 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 02:00:25,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-15 02:00:25,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2022-02-15 02:00:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 131 states have (on average 1.0381679389312977) internal successors, (136), 132 states have internal predecessors, (136), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:25,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 142 transitions. [2022-02-15 02:00:25,101 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 142 transitions. Word has length 129 [2022-02-15 02:00:25,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:25,101 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 142 transitions. [2022-02-15 02:00:25,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.644736842105263) internal successors, (125), 75 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:25,102 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 142 transitions. [2022-02-15 02:00:25,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 02:00:25,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:25,102 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:25,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 02:00:25,103 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:25,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:25,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1823466756, now seen corresponding path program 26 times [2022-02-15 02:00:25,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:25,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [437402009] [2022-02-15 02:00:25,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:25,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:25,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:25,183 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:25,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:25,254 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:25,255 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:25,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:25,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:25,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:25,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:26,424 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:26,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [437402009] [2022-02-15 02:00:26,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [437402009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:26,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:26,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 02:00:26,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257362519] [2022-02-15 02:00:26,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:26,425 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 02:00:26,425 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:26,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 02:00:26,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1877, Invalid=4285, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 02:00:26,426 INFO L87 Difference]: Start difference. First operand 138 states and 142 transitions. Second operand has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 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) [2022-02-15 02:00:29,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:29,817 INFO L93 Difference]: Finished difference Result 273 states and 286 transitions. [2022-02-15 02:00:29,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 02:00:29,818 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 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 [2022-02-15 02:00:29,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:29,818 INFO L225 Difference]: With dead ends: 273 [2022-02-15 02:00:29,818 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 02:00:29,820 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6824 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=5625, Invalid=18245, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:00:29,821 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 212 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4782 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 4922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:29,821 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [213 Valid, 42 Invalid, 4922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4782 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 02:00:29,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 02:00:29,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 143. [2022-02-15 02:00:29,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 136 states have (on average 1.036764705882353) internal successors, (141), 137 states have internal predecessors, (141), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:29,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 147 transitions. [2022-02-15 02:00:29,827 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 147 transitions. Word has length 134 [2022-02-15 02:00:29,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:29,827 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 147 transitions. [2022-02-15 02:00:29,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.6455696202531647) internal successors, (130), 78 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) [2022-02-15 02:00:29,827 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 147 transitions. [2022-02-15 02:00:29,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 02:00:29,828 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:29,828 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:29,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 02:00:29,828 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:29,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:29,828 INFO L85 PathProgramCache]: Analyzing trace with hash -1646419499, now seen corresponding path program 27 times [2022-02-15 02:00:29,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:29,829 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973825738] [2022-02-15 02:00:29,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:29,884 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:29,911 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:29,911 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:29,951 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:29,987 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:29,987 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:29,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:30,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:30,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:30,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:31,238 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:31,238 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973825738] [2022-02-15 02:00:31,238 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [973825738] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:31,238 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:31,238 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 02:00:31,238 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037590787] [2022-02-15 02:00:31,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:31,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 02:00:31,239 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:31,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 02:00:31,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2017, Invalid=4625, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 02:00:31,240 INFO L87 Difference]: Start difference. First operand 143 states and 147 transitions. Second operand has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:33,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:33,936 INFO L93 Difference]: Finished difference Result 283 states and 296 transitions. [2022-02-15 02:00:33,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 02:00:33,944 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 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 139 [2022-02-15 02:00:33,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:33,944 INFO L225 Difference]: With dead ends: 283 [2022-02-15 02:00:33,944 INFO L226 Difference]: Without dead ends: 148 [2022-02-15 02:00:33,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 56 SyntacticMatches, 2 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7370 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=6045, Invalid=19715, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:00:33,947 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 219 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5249 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 5498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 5249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:33,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [220 Valid, 52 Invalid, 5498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 5249 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 02:00:33,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-15 02:00:33,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 148. [2022-02-15 02:00:33,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 141 states have (on average 1.0354609929078014) internal successors, (146), 142 states have internal predecessors, (146), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:33,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2022-02-15 02:00:33,955 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 139 [2022-02-15 02:00:33,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:33,955 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2022-02-15 02:00:33,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.646341463414634) internal successors, (135), 81 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:33,955 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2022-02-15 02:00:33,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-15 02:00:33,956 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:33,956 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:33,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 02:00:33,956 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:33,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:33,956 INFO L85 PathProgramCache]: Analyzing trace with hash 1814438904, now seen corresponding path program 28 times [2022-02-15 02:00:33,956 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:33,956 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187805254] [2022-02-15 02:00:33,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:33,998 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:34,018 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:34,018 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:34,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:34,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:34,078 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:34,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:34,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:34,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:34,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:35,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:35,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187805254] [2022-02-15 02:00:35,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1187805254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:35,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:35,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 02:00:35,403 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206217944] [2022-02-15 02:00:35,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:35,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 02:00:35,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:35,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 02:00:35,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2162, Invalid=4978, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 02:00:35,405 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 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) [2022-02-15 02:00:39,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:39,035 INFO L93 Difference]: Finished difference Result 293 states and 306 transitions. [2022-02-15 02:00:39,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 02:00:39,035 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 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 [2022-02-15 02:00:39,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:39,036 INFO L225 Difference]: With dead ends: 293 [2022-02-15 02:00:39,036 INFO L226 Difference]: Without dead ends: 153 [2022-02-15 02:00:39,038 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7937 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6480, Invalid=21242, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:00:39,039 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 284 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5633 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 6002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 5633 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:39,039 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 52 Invalid, 6002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 5633 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 02:00:39,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-02-15 02:00:39,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2022-02-15 02:00:39,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 146 states have (on average 1.0342465753424657) internal successors, (151), 147 states have internal predecessors, (151), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:39,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 157 transitions. [2022-02-15 02:00:39,045 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 157 transitions. Word has length 144 [2022-02-15 02:00:39,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:39,045 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 157 transitions. [2022-02-15 02:00:39,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.6470588235294117) internal successors, (140), 84 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) [2022-02-15 02:00:39,045 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 157 transitions. [2022-02-15 02:00:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 02:00:39,046 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:39,046 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:39,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 02:00:39,046 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:39,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:39,046 INFO L85 PathProgramCache]: Analyzing trace with hash 947463649, now seen corresponding path program 29 times [2022-02-15 02:00:39,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:39,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1618958889] [2022-02-15 02:00:39,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:39,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:39,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:39,106 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:39,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:39,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:39,160 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:39,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:39,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:39,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:40,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:40,491 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1618958889] [2022-02-15 02:00:40,491 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1618958889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:40,491 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:40,491 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 02:00:40,491 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603296801] [2022-02-15 02:00:40,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:40,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 02:00:40,491 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:40,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 02:00:40,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2440, Invalid=5750, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 02:00:40,493 INFO L87 Difference]: Start difference. First operand 153 states and 157 transitions. Second operand has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:45,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:45,027 INFO L93 Difference]: Finished difference Result 407 states and 420 transitions. [2022-02-15 02:00:45,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-02-15 02:00:45,027 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 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 149 [2022-02-15 02:00:45,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:45,028 INFO L225 Difference]: With dead ends: 407 [2022-02-15 02:00:45,028 INFO L226 Difference]: Without dead ends: 262 [2022-02-15 02:00:45,029 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9026 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=7063, Invalid=23737, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:00:45,030 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 290 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6235 mSolverCounterSat, 319 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 291 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 319 IncrementalHoareTripleChecker+Valid, 6235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:45,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [291 Valid, 47 Invalid, 6554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [319 Valid, 6235 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:00:45,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-15 02:00:45,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 262. [2022-02-15 02:00:45,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 255 states have (on average 1.0235294117647058) internal successors, (261), 256 states have internal predecessors, (261), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:45,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 267 transitions. [2022-02-15 02:00:45,043 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 267 transitions. Word has length 149 [2022-02-15 02:00:45,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:45,043 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 267 transitions. [2022-02-15 02:00:45,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.6477272727272727) internal successors, (145), 87 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 267 transitions. [2022-02-15 02:00:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 02:00:45,044 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:45,044 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:45,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 02:00:45,044 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:45,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:45,044 INFO L85 PathProgramCache]: Analyzing trace with hash 284122663, now seen corresponding path program 30 times [2022-02-15 02:00:45,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:45,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [948660912] [2022-02-15 02:00:45,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:45,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:45,118 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:45,118 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:45,137 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:45,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:45,179 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:45,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:47,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:47,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [948660912] [2022-02-15 02:00:47,073 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [948660912] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:47,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:47,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 02:00:47,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933221553] [2022-02-15 02:00:47,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:47,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 02:00:47,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:47,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 02:00:47,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2433, Invalid=5577, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 02:00:47,075 INFO L87 Difference]: Start difference. First operand 262 states and 267 transitions. Second operand has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 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) [2022-02-15 02:00:50,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:50,697 INFO L93 Difference]: Finished difference Result 415 states and 431 transitions. [2022-02-15 02:00:50,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-15 02:00:50,697 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 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 [2022-02-15 02:00:50,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:50,698 INFO L225 Difference]: With dead ends: 415 [2022-02-15 02:00:50,698 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 02:00:50,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8956 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=7293, Invalid=23859, Unknown=0, NotChecked=0, Total=31152 [2022-02-15 02:00:50,701 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6296 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 6569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 6296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:50,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 52 Invalid, 6569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 6296 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 02:00:50,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 02:00:50,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 161. [2022-02-15 02:00:50,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 154 states have (on average 1.0324675324675325) internal successors, (159), 155 states have internal predecessors, (159), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:50,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-02-15 02:00:50,708 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 152 [2022-02-15 02:00:50,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:50,708 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-02-15 02:00:50,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6444444444444444) internal successors, (148), 89 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) [2022-02-15 02:00:50,708 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-02-15 02:00:50,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 02:00:50,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:50,709 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:50,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 02:00:50,709 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:50,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:50,709 INFO L85 PathProgramCache]: Analyzing trace with hash 2031868818, now seen corresponding path program 31 times [2022-02-15 02:00:50,709 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:50,709 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375608538] [2022-02-15 02:00:50,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:50,762 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:50,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:50,788 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:50,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:50,843 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:50,843 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:50,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:50,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:51,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:51,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:51,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:52,864 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:52,864 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375608538] [2022-02-15 02:00:52,864 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375608538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:52,865 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:52,865 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-15 02:00:52,865 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90599377] [2022-02-15 02:00:52,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:52,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-15 02:00:52,865 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:52,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-15 02:00:52,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2592, Invalid=5964, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 02:00:52,867 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:00:57,056 INFO L93 Difference]: Finished difference Result 319 states and 332 transitions. [2022-02-15 02:00:57,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 02:00:57,056 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 states have internal predecessors, (153), 2 states have call successors, (3), 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 157 [2022-02-15 02:00:57,056 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:00:57,057 INFO L225 Difference]: With dead ends: 319 [2022-02-15 02:00:57,057 INFO L226 Difference]: Without dead ends: 166 [2022-02-15 02:00:57,059 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9580 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=7770, Invalid=25536, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 02:00:57,060 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 309 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 6815 mSolverCounterSat, 402 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 7217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 402 IncrementalHoareTripleChecker+Valid, 6815 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:00:57,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 72 Invalid, 7217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [402 Valid, 6815 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 02:00:57,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2022-02-15 02:00:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 166. [2022-02-15 02:00:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 160 states have internal predecessors, (164), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:00:57,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 170 transitions. [2022-02-15 02:00:57,067 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 170 transitions. Word has length 157 [2022-02-15 02:00:57,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:00:57,068 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 170 transitions. [2022-02-15 02:00:57,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.6451612903225807) internal successors, (153), 92 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:00:57,068 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 170 transitions. [2022-02-15 02:00:57,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-02-15 02:00:57,068 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:00:57,068 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:00:57,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 02:00:57,068 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:00:57,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:00:57,069 INFO L85 PathProgramCache]: Analyzing trace with hash -1267358885, now seen corresponding path program 32 times [2022-02-15 02:00:57,069 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:00:57,069 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [155460835] [2022-02-15 02:00:57,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:00:57,115 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,144 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:57,181 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:00:57,228 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:00:57,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:00:57,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:00:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:00:57,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:00:59,493 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:00:59,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [155460835] [2022-02-15 02:00:59,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [155460835] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:00:59,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:00:59,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 02:00:59,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760326963] [2022-02-15 02:00:59,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:00:59,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 02:00:59,494 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:00:59,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 02:00:59,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2756, Invalid=6364, Unknown=0, NotChecked=0, Total=9120 [2022-02-15 02:00:59,495 INFO L87 Difference]: Start difference. First operand 166 states and 170 transitions. Second operand has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 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) [2022-02-15 02:01:04,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:04,273 INFO L93 Difference]: Finished difference Result 329 states and 342 transitions. [2022-02-15 02:01:04,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-15 02:01:04,273 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 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 [2022-02-15 02:01:04,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:04,274 INFO L225 Difference]: With dead ends: 329 [2022-02-15 02:01:04,274 INFO L226 Difference]: Without dead ends: 171 [2022-02-15 02:01:04,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10225 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=8262, Invalid=27270, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 02:01:04,276 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 317 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7217 mSolverCounterSat, 291 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 7508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 291 IncrementalHoareTripleChecker+Valid, 7217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:04,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 37 Invalid, 7508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [291 Valid, 7217 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:01:04,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-15 02:01:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 171. [2022-02-15 02:01:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 164 states have (on average 1.0304878048780488) internal successors, (169), 165 states have internal predecessors, (169), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:04,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 175 transitions. [2022-02-15 02:01:04,283 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 175 transitions. Word has length 162 [2022-02-15 02:01:04,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:04,283 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 175 transitions. [2022-02-15 02:01:04,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6458333333333333) internal successors, (158), 95 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) [2022-02-15 02:01:04,283 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 175 transitions. [2022-02-15 02:01:04,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-15 02:01:04,283 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:04,284 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:04,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 02:01:04,284 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:04,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:04,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1515716258, now seen corresponding path program 33 times [2022-02-15 02:01:04,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:04,284 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882354012] [2022-02-15 02:01:04,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:04,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,333 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,344 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,367 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:04,368 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:04,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:04,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:04,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:04,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:06,747 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:06,747 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882354012] [2022-02-15 02:01:06,747 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1882354012] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:06,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:06,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-15 02:01:06,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322372667] [2022-02-15 02:01:06,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:06,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-15 02:01:06,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-15 02:01:06,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3068, Invalid=7234, Unknown=0, NotChecked=0, Total=10302 [2022-02-15 02:01:06,749 INFO L87 Difference]: Start difference. First operand 171 states and 175 transitions. Second operand has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:12,528 INFO L93 Difference]: Finished difference Result 457 states and 470 transitions. [2022-02-15 02:01:12,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 02:01:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 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 167 [2022-02-15 02:01:12,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:12,530 INFO L225 Difference]: With dead ends: 457 [2022-02-15 02:01:12,530 INFO L226 Difference]: Without dead ends: 294 [2022-02-15 02:01:12,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 67 SyntacticMatches, 1 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11456 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=8917, Invalid=30089, Unknown=0, NotChecked=0, Total=39006 [2022-02-15 02:01:12,532 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 7999 mSolverCounterSat, 296 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 8295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 296 IncrementalHoareTripleChecker+Valid, 7999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:12,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 47 Invalid, 8295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [296 Valid, 7999 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:01:12,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2022-02-15 02:01:12,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2022-02-15 02:01:12,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 287 states have (on average 1.0209059233449478) internal successors, (293), 288 states have internal predecessors, (293), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 299 transitions. [2022-02-15 02:01:12,567 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 299 transitions. Word has length 167 [2022-02-15 02:01:12,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:12,567 INFO L470 AbstractCegarLoop]: Abstraction has 294 states and 299 transitions. [2022-02-15 02:01:12,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6464646464646464) internal successors, (163), 98 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 299 transitions. [2022-02-15 02:01:12,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 02:01:12,568 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:12,568 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:12,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 02:01:12,568 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:12,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:12,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1698637046, now seen corresponding path program 34 times [2022-02-15 02:01:12,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:12,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908558514] [2022-02-15 02:01:12,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:12,621 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,659 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,697 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:12,740 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:12,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:12,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:13,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:13,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:13,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:15,170 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:15,170 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908558514] [2022-02-15 02:01:15,170 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1908558514] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:15,170 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:15,170 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-15 02:01:15,170 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277240372] [2022-02-15 02:01:15,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:15,171 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-15 02:01:15,171 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-15 02:01:15,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3061, Invalid=7039, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 02:01:15,172 INFO L87 Difference]: Start difference. First operand 294 states and 299 transitions. Second operand has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:19,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:19,779 INFO L93 Difference]: Finished difference Result 465 states and 481 transitions. [2022-02-15 02:01:19,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 02:01:19,780 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-15 02:01:19,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:19,781 INFO L225 Difference]: With dead ends: 465 [2022-02-15 02:01:19,781 INFO L226 Difference]: Without dead ends: 301 [2022-02-15 02:01:19,783 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11377 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=9177, Invalid=30225, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 02:01:19,784 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 269 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 8038 mSolverCounterSat, 370 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 8408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 370 IncrementalHoareTripleChecker+Valid, 8038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:19,784 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 67 Invalid, 8408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [370 Valid, 8038 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 02:01:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2022-02-15 02:01:19,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 179. [2022-02-15 02:01:19,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 172 states have (on average 1.0290697674418605) internal successors, (177), 173 states have internal predecessors, (177), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:19,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-02-15 02:01:19,791 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 170 [2022-02-15 02:01:19,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:19,792 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-02-15 02:01:19,792 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.6435643564356435) internal successors, (166), 100 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:19,792 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-02-15 02:01:19,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-15 02:01:19,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:19,792 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:19,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 02:01:19,793 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:19,793 INFO L85 PathProgramCache]: Analyzing trace with hash -252581489, now seen corresponding path program 35 times [2022-02-15 02:01:19,793 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:19,793 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020093287] [2022-02-15 02:01:19,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:19,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,859 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:19,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,912 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:19,913 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:19,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:19,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:20,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:20,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:20,417 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:21,865 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:21,866 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020093287] [2022-02-15 02:01:21,866 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020093287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:21,866 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:21,866 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 02:01:21,866 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723002600] [2022-02-15 02:01:21,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:21,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 02:01:21,866 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:21,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 02:01:21,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3239, Invalid=7473, Unknown=0, NotChecked=0, Total=10712 [2022-02-15 02:01:21,868 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:28,216 INFO L93 Difference]: Finished difference Result 355 states and 368 transitions. [2022-02-15 02:01:28,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-02-15 02:01:28,217 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 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 175 [2022-02-15 02:01:28,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:28,218 INFO L225 Difference]: With dead ends: 355 [2022-02-15 02:01:28,218 INFO L226 Difference]: Without dead ends: 184 [2022-02-15 02:01:28,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12079 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=9711, Invalid=32109, Unknown=0, NotChecked=0, Total=41820 [2022-02-15 02:01:28,220 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 411 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 8495 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 412 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 9011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 8495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:28,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [412 Valid, 37 Invalid, 9011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 8495 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 02:01:28,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-02-15 02:01:28,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-02-15 02:01:28,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 178 states have internal predecessors, (182), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:28,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2022-02-15 02:01:28,228 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 175 [2022-02-15 02:01:28,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:28,228 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2022-02-15 02:01:28,228 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.6442307692307692) internal successors, (171), 103 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:28,228 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2022-02-15 02:01:28,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-02-15 02:01:28,229 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:28,229 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:28,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 02:01:28,229 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:28,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:28,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2115663486, now seen corresponding path program 36 times [2022-02-15 02:01:28,229 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:28,229 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635532731] [2022-02-15 02:01:28,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:28,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,289 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,313 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:28,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:28,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:28,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:28,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:28,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:30,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:30,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635532731] [2022-02-15 02:01:30,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1635532731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:30,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:30,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-15 02:01:30,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678918190] [2022-02-15 02:01:30,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:30,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-15 02:01:30,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:30,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-15 02:01:30,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3422, Invalid=7920, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 02:01:30,946 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:36,521 INFO L93 Difference]: Finished difference Result 365 states and 378 transitions. [2022-02-15 02:01:36,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 02:01:36,521 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 180 [2022-02-15 02:01:36,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:36,522 INFO L225 Difference]: With dead ends: 365 [2022-02-15 02:01:36,522 INFO L226 Difference]: Without dead ends: 189 [2022-02-15 02:01:36,525 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12802 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10260, Invalid=34050, Unknown=0, NotChecked=0, Total=44310 [2022-02-15 02:01:36,526 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 215 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 9020 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 9274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 9020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:36,526 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [216 Valid, 62 Invalid, 9274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 9020 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:01:36,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-02-15 02:01:36,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 189. [2022-02-15 02:01:36,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 182 states have (on average 1.0274725274725274) internal successors, (187), 183 states have internal predecessors, (187), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:36,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 193 transitions. [2022-02-15 02:01:36,533 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 193 transitions. Word has length 180 [2022-02-15 02:01:36,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:36,533 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 193 transitions. [2022-02-15 02:01:36,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.644859813084112) internal successors, (176), 106 states have internal predecessors, (176), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:36,534 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 193 transitions. [2022-02-15 02:01:36,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 02:01:36,534 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:36,534 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:36,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 02:01:36,534 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:36,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:36,535 INFO L85 PathProgramCache]: Analyzing trace with hash 1071472923, now seen corresponding path program 37 times [2022-02-15 02:01:36,535 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:36,535 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278807044] [2022-02-15 02:01:36,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:36,575 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,587 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:36,599 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:36,652 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:36,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:37,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:37,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:39,385 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:39,385 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278807044] [2022-02-15 02:01:39,385 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [278807044] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:39,385 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:39,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-15 02:01:39,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [219258897] [2022-02-15 02:01:39,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:39,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-15 02:01:39,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:39,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-15 02:01:39,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3610, Invalid=8380, Unknown=0, NotChecked=0, Total=11990 [2022-02-15 02:01:39,387 INFO L87 Difference]: Start difference. First operand 189 states and 193 transitions. Second operand has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:46,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:46,511 INFO L93 Difference]: Finished difference Result 375 states and 388 transitions. [2022-02-15 02:01:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-02-15 02:01:46,512 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 states have internal predecessors, (181), 2 states have call successors, (3), 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 185 [2022-02-15 02:01:46,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:46,512 INFO L225 Difference]: With dead ends: 375 [2022-02-15 02:01:46,512 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 02:01:46,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13546 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=10824, Invalid=36048, Unknown=0, NotChecked=0, Total=46872 [2022-02-15 02:01:46,516 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 364 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9511 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 365 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 9983 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 9511 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:46,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [365 Valid, 37 Invalid, 9983 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 9511 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:01:46,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 02:01:46,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-02-15 02:01:46,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 187 states have (on average 1.0267379679144386) internal successors, (192), 188 states have internal predecessors, (192), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:46,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-02-15 02:01:46,523 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 185 [2022-02-15 02:01:46,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:46,524 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-02-15 02:01:46,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.6454545454545455) internal successors, (181), 109 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:46,524 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-02-15 02:01:46,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-15 02:01:46,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:46,524 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:46,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 02:01:46,524 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:46,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:46,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1117840398, now seen corresponding path program 38 times [2022-02-15 02:01:46,525 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:46,525 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812504136] [2022-02-15 02:01:46,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:46,567 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:46,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:46,587 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:46,613 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:46,651 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:46,651 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:46,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:47,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:47,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:48,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:48,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812504136] [2022-02-15 02:01:48,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812504136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:48,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:48,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-15 02:01:48,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520768214] [2022-02-15 02:01:48,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:48,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-15 02:01:48,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:48,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-15 02:01:48,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3803, Invalid=8853, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 02:01:48,730 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:54,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:01:54,063 INFO L93 Difference]: Finished difference Result 385 states and 398 transitions. [2022-02-15 02:01:54,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 02:01:54,064 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-15 02:01:54,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:01:54,064 INFO L225 Difference]: With dead ends: 385 [2022-02-15 02:01:54,064 INFO L226 Difference]: Without dead ends: 199 [2022-02-15 02:01:54,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14311 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=11403, Invalid=38103, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 02:01:54,067 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 300 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10070 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 10412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 10070 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:01:54,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 42 Invalid, 10412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 10070 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 02:01:54,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-15 02:01:54,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 199. [2022-02-15 02:01:54,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 193 states have internal predecessors, (197), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:01:54,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 203 transitions. [2022-02-15 02:01:54,076 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 203 transitions. Word has length 190 [2022-02-15 02:01:54,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:01:54,076 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 203 transitions. [2022-02-15 02:01:54,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.6460176991150441) internal successors, (186), 112 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:01:54,076 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 203 transitions. [2022-02-15 02:01:54,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-02-15 02:01:54,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:01:54,077 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:01:54,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 02:01:54,077 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:01:54,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:01:54,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1009029465, now seen corresponding path program 39 times [2022-02-15 02:01:54,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:01:54,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [273275905] [2022-02-15 02:01:54,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:01:54,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,144 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:54,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:01:54,216 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:01:54,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:01:54,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:01:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:01:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:01:56,459 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:01:56,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [273275905] [2022-02-15 02:01:56,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [273275905] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:01:56,460 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:01:56,460 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-15 02:01:56,460 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304958742] [2022-02-15 02:01:56,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:01:56,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-15 02:01:56,460 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:01:56,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-15 02:01:56,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4001, Invalid=9339, Unknown=0, NotChecked=0, Total=13340 [2022-02-15 02:01:56,462 INFO L87 Difference]: Start difference. First operand 199 states and 203 transitions. Second operand has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:01,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:01,618 INFO L93 Difference]: Finished difference Result 395 states and 408 transitions. [2022-02-15 02:02:01,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-02-15 02:02:01,618 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 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 195 [2022-02-15 02:02:01,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:01,619 INFO L225 Difference]: With dead ends: 395 [2022-02-15 02:02:01,619 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 02:02:01,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 307 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15097 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11997, Invalid=40215, Unknown=0, NotChecked=0, Total=52212 [2022-02-15 02:02:01,622 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 534 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 10661 mSolverCounterSat, 578 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 535 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 11239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 578 IncrementalHoareTripleChecker+Valid, 10661 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:01,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [535 Valid, 32 Invalid, 11239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [578 Valid, 10661 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 02:02:01,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 02:02:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2022-02-15 02:02:01,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 197 states have (on average 1.0253807106598984) internal successors, (202), 198 states have internal predecessors, (202), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:01,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 208 transitions. [2022-02-15 02:02:01,630 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 208 transitions. Word has length 195 [2022-02-15 02:02:01,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:01,630 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 208 transitions. [2022-02-15 02:02:01,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.646551724137931) internal successors, (191), 115 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:01,630 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 208 transitions. [2022-02-15 02:02:01,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 02:02:01,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:01,631 INFO L514 BasicCegarLoop]: trace histogram [74, 73, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:01,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 02:02:01,631 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:01,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:01,632 INFO L85 PathProgramCache]: Analyzing trace with hash 151227238, now seen corresponding path program 40 times [2022-02-15 02:02:01,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:01,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809066998] [2022-02-15 02:02:01,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:01,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:01,720 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:01,720 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:01,743 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:01,785 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:01,785 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:01,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:01,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:02,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:02,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:04,189 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:04,190 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809066998] [2022-02-15 02:02:04,190 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1809066998] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:04,190 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:04,190 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-15 02:02:04,190 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531796127] [2022-02-15 02:02:04,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:04,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-15 02:02:04,190 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:04,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-15 02:02:04,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4374, Invalid=10388, Unknown=0, NotChecked=0, Total=14762 [2022-02-15 02:02:04,192 INFO L87 Difference]: Start difference. First operand 204 states and 208 transitions. Second operand has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:11,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:11,894 INFO L93 Difference]: Finished difference Result 549 states and 562 transitions. [2022-02-15 02:02:11,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 02:02:11,894 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 02:02:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:11,908 INFO L225 Difference]: With dead ends: 549 [2022-02-15 02:02:11,908 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 02:02:11,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16587 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=12781, Invalid=43625, Unknown=0, NotChecked=0, Total=56406 [2022-02-15 02:02:11,912 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 392 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 11462 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 393 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 11893 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 11462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:11,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [393 Valid, 37 Invalid, 11893 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 11462 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-15 02:02:11,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 02:02:11,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 353. [2022-02-15 02:02:11,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 346 states have (on average 1.0173410404624277) internal successors, (352), 347 states have internal predecessors, (352), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:11,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 358 transitions. [2022-02-15 02:02:11,927 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 358 transitions. Word has length 200 [2022-02-15 02:02:11,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:11,927 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 358 transitions. [2022-02-15 02:02:11,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.6470588235294117) internal successors, (196), 118 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 358 transitions. [2022-02-15 02:02:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 02:02:11,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:11,928 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:11,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 02:02:11,928 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:11,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:11,928 INFO L85 PathProgramCache]: Analyzing trace with hash -2051541736, now seen corresponding path program 41 times [2022-02-15 02:02:11,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:11,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622883077] [2022-02-15 02:02:11,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:11,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,002 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:12,029 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,067 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:12,068 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:12,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:12,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:12,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:12,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:12,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:14,433 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:14,433 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622883077] [2022-02-15 02:02:14,433 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [622883077] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:14,433 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:14,433 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-15 02:02:14,433 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142185588] [2022-02-15 02:02:14,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:14,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-15 02:02:14,434 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:14,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-15 02:02:14,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4367, Invalid=10153, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 02:02:14,436 INFO L87 Difference]: Start difference. First operand 353 states and 358 transitions. Second operand has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:19,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:19,885 INFO L93 Difference]: Finished difference Result 557 states and 573 transitions. [2022-02-15 02:02:19,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-15 02:02:19,885 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 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 203 [2022-02-15 02:02:19,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:19,886 INFO L225 Difference]: With dead ends: 557 [2022-02-15 02:02:19,886 INFO L226 Difference]: Without dead ends: 360 [2022-02-15 02:02:19,890 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16490 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=13095, Invalid=43787, Unknown=0, NotChecked=0, Total=56882 [2022-02-15 02:02:19,890 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 320 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 11515 mSolverCounterSat, 288 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 11803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 288 IncrementalHoareTripleChecker+Valid, 11515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:19,891 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 52 Invalid, 11803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [288 Valid, 11515 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 02:02:19,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-15 02:02:19,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 212. [2022-02-15 02:02:19,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 205 states have (on average 1.024390243902439) internal successors, (210), 206 states have internal predecessors, (210), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:19,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2022-02-15 02:02:19,919 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 203 [2022-02-15 02:02:19,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:19,919 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2022-02-15 02:02:19,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.6446280991735538) internal successors, (199), 120 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:19,919 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2022-02-15 02:02:19,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-02-15 02:02:19,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:19,920 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:19,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 02:02:19,920 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:19,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:19,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1904809707, now seen corresponding path program 42 times [2022-02-15 02:02:19,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:19,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991422407] [2022-02-15 02:02:19,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:19,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:19,979 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:19,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:20,005 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,043 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:20,044 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:20,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:20,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:20,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:20,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:22,403 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:22,403 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991422407] [2022-02-15 02:02:22,403 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991422407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:22,403 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:22,403 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-15 02:02:22,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322221490] [2022-02-15 02:02:22,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:22,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-15 02:02:22,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:22,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-15 02:02:22,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4579, Invalid=10673, Unknown=0, NotChecked=0, Total=15252 [2022-02-15 02:02:22,405 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:28,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:28,137 INFO L93 Difference]: Finished difference Result 421 states and 434 transitions. [2022-02-15 02:02:28,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-15 02:02:28,138 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 208 [2022-02-15 02:02:28,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:28,139 INFO L225 Difference]: With dead ends: 421 [2022-02-15 02:02:28,139 INFO L226 Difference]: Without dead ends: 217 [2022-02-15 02:02:28,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17333 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=13731, Invalid=46049, Unknown=0, NotChecked=0, Total=59780 [2022-02-15 02:02:28,142 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 569 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 12155 mSolverCounterSat, 695 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 695 IncrementalHoareTripleChecker+Valid, 12155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:28,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 27 Invalid, 12850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [695 Valid, 12155 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 02:02:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2022-02-15 02:02:28,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 217. [2022-02-15 02:02:28,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 210 states have (on average 1.0238095238095237) internal successors, (215), 211 states have internal predecessors, (215), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:28,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 221 transitions. [2022-02-15 02:02:28,165 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 221 transitions. Word has length 208 [2022-02-15 02:02:28,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:28,165 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 221 transitions. [2022-02-15 02:02:28,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.6451612903225807) internal successors, (204), 123 states have internal predecessors, (204), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:28,165 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 221 transitions. [2022-02-15 02:02:28,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-15 02:02:28,166 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:28,166 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:28,166 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 02:02:28,166 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:28,166 INFO L85 PathProgramCache]: Analyzing trace with hash -229747612, now seen corresponding path program 43 times [2022-02-15 02:02:28,166 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:28,166 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114034977] [2022-02-15 02:02:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:28,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:28,240 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:28,240 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:28,252 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:28,288 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:28,288 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:28,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:28,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:28,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:28,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:30,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:30,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114034977] [2022-02-15 02:02:30,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [114034977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:30,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:30,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-02-15 02:02:30,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966501483] [2022-02-15 02:02:30,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:30,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-02-15 02:02:30,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:30,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-02-15 02:02:30,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4977, Invalid=11793, Unknown=0, NotChecked=0, Total=16770 [2022-02-15 02:02:30,662 INFO L87 Difference]: Start difference. First operand 217 states and 221 transitions. Second operand has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:36,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:36,697 INFO L93 Difference]: Finished difference Result 585 states and 598 transitions. [2022-02-15 02:02:36,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 02:02:36,697 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 states have internal predecessors, (209), 2 states have call successors, (3), 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 213 [2022-02-15 02:02:36,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:36,711 INFO L225 Difference]: With dead ends: 585 [2022-02-15 02:02:36,711 INFO L226 Difference]: Without dead ends: 376 [2022-02-15 02:02:36,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18926 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=14568, Invalid=49694, Unknown=0, NotChecked=0, Total=64262 [2022-02-15 02:02:36,719 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 336 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 13013 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 13390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 13013 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:36,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [337 Valid, 52 Invalid, 13390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 13013 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 02:02:36,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-02-15 02:02:36,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-02-15 02:02:36,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 369 states have (on average 1.016260162601626) internal successors, (375), 370 states have internal predecessors, (375), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:36,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 381 transitions. [2022-02-15 02:02:36,738 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 381 transitions. Word has length 213 [2022-02-15 02:02:36,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:36,738 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 381 transitions. [2022-02-15 02:02:36,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.6456692913385826) internal successors, (209), 126 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:36,738 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 381 transitions. [2022-02-15 02:02:36,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-15 02:02:36,755 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:36,755 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:36,755 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 02:02:36,756 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:36,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:36,756 INFO L85 PathProgramCache]: Analyzing trace with hash -1415751676, now seen corresponding path program 44 times [2022-02-15 02:02:36,756 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:36,756 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471695997] [2022-02-15 02:02:36,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:36,787 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:36,799 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:36,799 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:36,815 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:36,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:36,850 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:36,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:36,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:37,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:37,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:37,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:39,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:39,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471695997] [2022-02-15 02:02:39,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [471695997] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:39,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:39,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-15 02:02:39,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827712910] [2022-02-15 02:02:39,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:39,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-15 02:02:39,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:39,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-15 02:02:39,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4970, Invalid=11542, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 02:02:39,206 INFO L87 Difference]: Start difference. First operand 376 states and 381 transitions. Second operand has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:47,106 INFO L93 Difference]: Finished difference Result 593 states and 609 transitions. [2022-02-15 02:02:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-15 02:02:47,106 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-02-15 02:02:47,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:47,107 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:02:47,107 INFO L226 Difference]: Without dead ends: 383 [2022-02-15 02:02:47,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18823 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=14904, Invalid=49866, Unknown=0, NotChecked=0, Total=64770 [2022-02-15 02:02:47,112 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 673 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 13082 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 13889 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 13082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:47,112 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 32 Invalid, 13889 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 13082 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-15 02:02:47,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-02-15 02:02:47,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 225. [2022-02-15 02:02:47,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 218 states have (on average 1.0229357798165137) internal successors, (223), 219 states have internal predecessors, (223), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:47,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 229 transitions. [2022-02-15 02:02:47,155 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 229 transitions. Word has length 216 [2022-02-15 02:02:47,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:47,155 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 229 transitions. [2022-02-15 02:02:47,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.6434108527131783) internal successors, (212), 128 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:47,156 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 229 transitions. [2022-02-15 02:02:47,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-15 02:02:47,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:47,156 INFO L514 BasicCegarLoop]: trace histogram [82, 81, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:47,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 02:02:47,157 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:47,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:47,157 INFO L85 PathProgramCache]: Analyzing trace with hash -873829035, now seen corresponding path program 45 times [2022-02-15 02:02:47,157 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:47,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142556150] [2022-02-15 02:02:47,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:47,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,199 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,199 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:47,215 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:47,248 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:47,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:47,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:47,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:47,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:49,790 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:49,791 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142556150] [2022-02-15 02:02:49,791 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142556150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:49,791 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:49,791 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-15 02:02:49,791 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086076463] [2022-02-15 02:02:49,791 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:49,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-15 02:02:49,807 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:49,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-15 02:02:49,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5384, Invalid=12706, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 02:02:49,809 INFO L87 Difference]: Start difference. First operand 225 states and 229 transitions. Second operand has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:56,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:02:56,264 INFO L93 Difference]: Finished difference Result 607 states and 620 transitions. [2022-02-15 02:02:56,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-15 02:02:56,265 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 2 states have call successors, (3), 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 221 [2022-02-15 02:02:56,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:02:56,267 INFO L225 Difference]: With dead ends: 607 [2022-02-15 02:02:56,267 INFO L226 Difference]: Without dead ends: 390 [2022-02-15 02:02:56,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 351 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20480 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=15775, Invalid=53657, Unknown=0, NotChecked=0, Total=69432 [2022-02-15 02:02:56,287 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 432 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14161 mSolverCounterSat, 477 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 14638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 14161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:02:56,287 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [433 Valid, 27 Invalid, 14638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [477 Valid, 14161 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 02:02:56,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2022-02-15 02:02:56,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 390. [2022-02-15 02:02:56,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 383 states have (on average 1.0156657963446476) internal successors, (389), 384 states have internal predecessors, (389), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:02:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 395 transitions. [2022-02-15 02:02:56,330 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 395 transitions. Word has length 221 [2022-02-15 02:02:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:02:56,330 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 395 transitions. [2022-02-15 02:02:56,330 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.643939393939394) internal successors, (217), 131 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:02:56,330 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 395 transitions. [2022-02-15 02:02:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-15 02:02:56,331 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:02:56,331 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:02:56,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 02:02:56,331 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:02:56,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:02:56,331 INFO L85 PathProgramCache]: Analyzing trace with hash 346458163, now seen corresponding path program 46 times [2022-02-15 02:02:56,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:02:56,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833260829] [2022-02-15 02:02:56,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:02:56,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,370 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,370 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:56,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,419 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:02:56,420 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:02:56,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:02:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:56,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:02:56,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:02:56,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:02:58,921 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:02:58,921 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833260829] [2022-02-15 02:02:58,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833260829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:02:58,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:02:58,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 02:02:58,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268071252] [2022-02-15 02:02:58,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:02:58,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 02:02:58,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:02:58,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 02:02:58,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5377, Invalid=12445, Unknown=0, NotChecked=0, Total=17822 [2022-02-15 02:02:58,932 INFO L87 Difference]: Start difference. First operand 390 states and 395 transitions. Second operand has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:06,690 INFO L93 Difference]: Finished difference Result 615 states and 631 transitions. [2022-02-15 02:03:06,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-15 02:03:06,690 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-15 02:03:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:06,691 INFO L225 Difference]: With dead ends: 615 [2022-02-15 02:03:06,691 INFO L226 Difference]: Without dead ends: 397 [2022-02-15 02:03:06,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20374 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=16125, Invalid=53835, Unknown=0, NotChecked=0, Total=69960 [2022-02-15 02:03:06,706 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 438 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 14168 mSolverCounterSat, 575 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 14743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 575 IncrementalHoareTripleChecker+Valid, 14168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:06,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 52 Invalid, 14743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [575 Valid, 14168 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 02:03:06,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2022-02-15 02:03:06,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 233. [2022-02-15 02:03:06,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 226 states have (on average 1.0221238938053097) internal successors, (231), 227 states have internal predecessors, (231), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:03:06,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 237 transitions. [2022-02-15 02:03:06,718 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 237 transitions. Word has length 224 [2022-02-15 02:03:06,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:06,718 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 237 transitions. [2022-02-15 02:03:06,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.6417910447761195) internal successors, (220), 133 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:06,718 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 237 transitions. [2022-02-15 02:03:06,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-15 02:03:06,719 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:06,719 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:06,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 02:03:06,720 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:06,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:06,721 INFO L85 PathProgramCache]: Analyzing trace with hash 330427654, now seen corresponding path program 47 times [2022-02-15 02:03:06,721 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:06,721 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [541241342] [2022-02-15 02:03:06,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:06,747 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:06,763 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:06,763 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:06,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:06,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:06,808 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:06,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:06,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:07,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:07,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:07,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:10,417 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:10,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [541241342] [2022-02-15 02:03:10,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [541241342] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:10,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:10,418 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-02-15 02:03:10,418 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420104338] [2022-02-15 02:03:10,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:10,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-02-15 02:03:10,418 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:10,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-02-15 02:03:10,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5612, Invalid=13020, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 02:03:10,420 INFO L87 Difference]: Start difference. First operand 233 states and 237 transitions. Second operand has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:17,496 INFO L93 Difference]: Finished difference Result 463 states and 476 transitions. [2022-02-15 02:03:17,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 02:03:17,497 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 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 229 [2022-02-15 02:03:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:17,497 INFO L225 Difference]: With dead ends: 463 [2022-02-15 02:03:17,497 INFO L226 Difference]: Without dead ends: 238 [2022-02-15 02:03:17,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21310 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=16830, Invalid=56340, Unknown=0, NotChecked=0, Total=73170 [2022-02-15 02:03:17,501 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 536 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14845 mSolverCounterSat, 674 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 15519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 674 IncrementalHoareTripleChecker+Valid, 14845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:17,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 37 Invalid, 15519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [674 Valid, 14845 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 02:03:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2022-02-15 02:03:17,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2022-02-15 02:03:17,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 231 states have (on average 1.0216450216450217) internal successors, (236), 232 states have internal predecessors, (236), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:03:17,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 242 transitions. [2022-02-15 02:03:17,510 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 242 transitions. Word has length 229 [2022-02-15 02:03:17,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:17,511 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 242 transitions. [2022-02-15 02:03:17,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.6423357664233578) internal successors, (225), 136 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:17,511 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 242 transitions. [2022-02-15 02:03:17,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-15 02:03:17,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:17,511 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:17,512 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 02:03:17,512 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:17,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:17,512 INFO L85 PathProgramCache]: Analyzing trace with hash 1764099687, now seen corresponding path program 48 times [2022-02-15 02:03:17,512 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:17,512 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100461448] [2022-02-15 02:03:17,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:17,570 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:17,587 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:17,587 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:17,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:17,627 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:17,628 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:17,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:17,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:18,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:18,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:20,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:20,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100461448] [2022-02-15 02:03:20,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100461448] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:20,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:20,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 02:03:20,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352731970] [2022-02-15 02:03:20,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:20,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 02:03:20,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:20,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 02:03:20,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5852, Invalid=13608, Unknown=0, NotChecked=0, Total=19460 [2022-02-15 02:03:20,266 INFO L87 Difference]: Start difference. First operand 238 states and 242 transitions. Second operand has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:27,326 INFO L93 Difference]: Finished difference Result 473 states and 486 transitions. [2022-02-15 02:03:27,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-15 02:03:27,327 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-15 02:03:27,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:27,327 INFO L225 Difference]: With dead ends: 473 [2022-02-15 02:03:27,327 INFO L226 Difference]: Without dead ends: 243 [2022-02-15 02:03:27,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 370 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22267 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=17550, Invalid=58902, Unknown=0, NotChecked=0, Total=76452 [2022-02-15 02:03:27,332 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 279 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 15477 mSolverCounterSat, 420 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 15897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 420 IncrementalHoareTripleChecker+Valid, 15477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:27,332 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [280 Valid, 37 Invalid, 15897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [420 Valid, 15477 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 02:03:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-15 02:03:27,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-02-15 02:03:27,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 236 states have (on average 1.021186440677966) internal successors, (241), 237 states have internal predecessors, (241), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:03:27,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2022-02-15 02:03:27,340 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 234 [2022-02-15 02:03:27,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:27,341 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2022-02-15 02:03:27,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.6428571428571428) internal successors, (230), 139 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:27,341 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2022-02-15 02:03:27,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-15 02:03:27,342 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:27,342 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:27,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 02:03:27,342 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:27,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:27,342 INFO L85 PathProgramCache]: Analyzing trace with hash 809204178, now seen corresponding path program 49 times [2022-02-15 02:03:27,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:27,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2009694736] [2022-02-15 02:03:27,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:27,402 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,422 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:27,450 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,501 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:27,501 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:27,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:27,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:28,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:31,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:31,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2009694736] [2022-02-15 02:03:31,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2009694736] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:31,766 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:31,766 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [143] imperfect sequences [] total 143 [2022-02-15 02:03:31,766 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576754461] [2022-02-15 02:03:31,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:31,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2022-02-15 02:03:31,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:31,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2022-02-15 02:03:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6097, Invalid=14209, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 02:03:31,768 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:39,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:39,660 INFO L93 Difference]: Finished difference Result 483 states and 496 transitions. [2022-02-15 02:03:39,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 02:03:39,660 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 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 239 [2022-02-15 02:03:39,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:39,663 INFO L225 Difference]: With dead ends: 483 [2022-02-15 02:03:39,664 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 02:03:39,668 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23245 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=18285, Invalid=61521, Unknown=0, NotChecked=0, Total=79806 [2022-02-15 02:03:39,671 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 561 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 16214 mSolverCounterSat, 705 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 562 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 16919 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 705 IncrementalHoareTripleChecker+Valid, 16214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:39,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [562 Valid, 32 Invalid, 16919 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [705 Valid, 16214 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 02:03:39,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 02:03:39,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-02-15 02:03:39,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 241 states have (on average 1.020746887966805) internal successors, (246), 242 states have internal predecessors, (246), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:03:39,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 252 transitions. [2022-02-15 02:03:39,688 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 252 transitions. Word has length 239 [2022-02-15 02:03:39,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:39,689 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 252 transitions. [2022-02-15 02:03:39,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 143 states have (on average 1.6433566433566433) internal successors, (235), 142 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:39,689 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 252 transitions. [2022-02-15 02:03:39,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-15 02:03:39,690 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:39,690 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:39,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 02:03:39,690 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:39,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:39,690 INFO L85 PathProgramCache]: Analyzing trace with hash -1471439205, now seen corresponding path program 50 times [2022-02-15 02:03:39,690 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:39,690 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647549104] [2022-02-15 02:03:39,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:39,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:39,757 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:39,757 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:39,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:39,813 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:39,814 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:39,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:40,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:40,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:44,412 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:44,412 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647549104] [2022-02-15 02:03:44,412 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1647549104] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:44,412 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:44,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-15 02:03:44,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211562606] [2022-02-15 02:03:44,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:44,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-15 02:03:44,413 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:44,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-15 02:03:44,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6347, Invalid=14823, Unknown=0, NotChecked=0, Total=21170 [2022-02-15 02:03:44,415 INFO L87 Difference]: Start difference. First operand 248 states and 252 transitions. Second operand has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:03:53,852 INFO L93 Difference]: Finished difference Result 493 states and 506 transitions. [2022-02-15 02:03:53,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-02-15 02:03:53,853 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-15 02:03:53,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:03:53,853 INFO L225 Difference]: With dead ends: 493 [2022-02-15 02:03:53,853 INFO L226 Difference]: Without dead ends: 253 [2022-02-15 02:03:53,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 287 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24244 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=19035, Invalid=64197, Unknown=0, NotChecked=0, Total=83232 [2022-02-15 02:03:53,858 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 291 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16916 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 17352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 16916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:03:53,858 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [292 Valid, 42 Invalid, 17352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 16916 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-15 02:03:53,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-02-15 02:03:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 253. [2022-02-15 02:03:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 246 states have (on average 1.0203252032520325) internal successors, (251), 247 states have internal predecessors, (251), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:03:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 257 transitions. [2022-02-15 02:03:53,868 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 257 transitions. Word has length 244 [2022-02-15 02:03:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:03:53,868 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 257 transitions. [2022-02-15 02:03:53,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.643835616438356) internal successors, (240), 145 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:03:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 257 transitions. [2022-02-15 02:03:53,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-15 02:03:53,886 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:03:53,886 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:03:53,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 02:03:53,887 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:03:53,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:03:53,887 INFO L85 PathProgramCache]: Analyzing trace with hash 494308510, now seen corresponding path program 51 times [2022-02-15 02:03:53,887 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:03:53,887 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744425343] [2022-02-15 02:03:53,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:03:53,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:53,957 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:53,972 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:54,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:03:54,017 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:03:54,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:03:54,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:54,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:03:54,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:03:54,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:03:57,519 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:03:57,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744425343] [2022-02-15 02:03:57,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [744425343] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:03:57,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:03:57,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-15 02:03:57,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290463467] [2022-02-15 02:03:57,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:03:57,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-15 02:03:57,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:03:57,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-15 02:03:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6602, Invalid=15450, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 02:03:57,523 INFO L87 Difference]: Start difference. First operand 253 states and 257 transitions. Second operand has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:07,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:07,182 INFO L93 Difference]: Finished difference Result 503 states and 516 transitions. [2022-02-15 02:04:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-15 02:04:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 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 249 [2022-02-15 02:04:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:07,183 INFO L225 Difference]: With dead ends: 503 [2022-02-15 02:04:07,184 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 02:04:07,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 394 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25264 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=19800, Invalid=66930, Unknown=0, NotChecked=0, Total=86730 [2022-02-15 02:04:07,187 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 775 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 17693 mSolverCounterSat, 835 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 776 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 18528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 835 IncrementalHoareTripleChecker+Valid, 17693 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:07,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [776 Valid, 32 Invalid, 18528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [835 Valid, 17693 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 02:04:07,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 02:04:07,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2022-02-15 02:04:07,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 251 states have (on average 1.0199203187250996) internal successors, (256), 252 states have internal predecessors, (256), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:07,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 262 transitions. [2022-02-15 02:04:07,208 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 262 transitions. Word has length 249 [2022-02-15 02:04:07,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:07,208 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 262 transitions. [2022-02-15 02:04:07,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.6442953020134228) internal successors, (245), 148 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:07,208 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 262 transitions. [2022-02-15 02:04:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-15 02:04:07,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:07,217 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:07,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 02:04:07,217 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:07,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1810362161, now seen corresponding path program 52 times [2022-02-15 02:04:07,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:07,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1911415263] [2022-02-15 02:04:07,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:07,252 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:07,268 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:07,268 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:07,281 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:07,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:07,306 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:07,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:07,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:08,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:08,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:08,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:10,912 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:10,912 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1911415263] [2022-02-15 02:04:10,912 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1911415263] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:10,912 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:10,912 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-15 02:04:10,912 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601228876] [2022-02-15 02:04:10,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:10,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-15 02:04:10,913 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:10,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-15 02:04:10,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6862, Invalid=16090, Unknown=0, NotChecked=0, Total=22952 [2022-02-15 02:04:10,915 INFO L87 Difference]: Start difference. First operand 258 states and 262 transitions. Second operand has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:20,668 INFO L93 Difference]: Finished difference Result 513 states and 526 transitions. [2022-02-15 02:04:20,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 152 states. [2022-02-15 02:04:20,668 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-15 02:04:20,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:20,677 INFO L225 Difference]: With dead ends: 513 [2022-02-15 02:04:20,677 INFO L226 Difference]: Without dead ends: 263 [2022-02-15 02:04:20,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 402 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26305 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=20580, Invalid=69720, Unknown=0, NotChecked=0, Total=90300 [2022-02-15 02:04:20,681 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 303 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 18523 mSolverCounterSat, 356 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 304 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 18879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 356 IncrementalHoareTripleChecker+Valid, 18523 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:20,681 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [304 Valid, 57 Invalid, 18879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [356 Valid, 18523 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 02:04:20,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-15 02:04:20,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 263. [2022-02-15 02:04:20,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 256 states have (on average 1.01953125) internal successors, (261), 257 states have internal predecessors, (261), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:20,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 267 transitions. [2022-02-15 02:04:20,690 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 267 transitions. Word has length 254 [2022-02-15 02:04:20,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:20,690 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 267 transitions. [2022-02-15 02:04:20,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 152 states have (on average 1.644736842105263) internal successors, (250), 151 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:20,690 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 267 transitions. [2022-02-15 02:04:20,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-15 02:04:20,691 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:20,691 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:20,691 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 02:04:20,691 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:20,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:20,692 INFO L85 PathProgramCache]: Analyzing trace with hash -209558166, now seen corresponding path program 53 times [2022-02-15 02:04:20,692 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:20,692 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1093284093] [2022-02-15 02:04:20,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:20,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,764 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,764 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:20,777 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,816 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:20,816 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:20,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:20,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:21,620 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:24,719 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:24,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1093284093] [2022-02-15 02:04:24,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1093284093] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:24,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:24,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-15 02:04:24,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077735711] [2022-02-15 02:04:24,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:24,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-15 02:04:24,728 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:24,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-15 02:04:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7127, Invalid=16743, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 02:04:24,735 INFO L87 Difference]: Start difference. First operand 263 states and 267 transitions. Second operand has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:37,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:37,616 INFO L93 Difference]: Finished difference Result 523 states and 536 transitions. [2022-02-15 02:04:37,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-15 02:04:37,617 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 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 259 [2022-02-15 02:04:37,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:37,618 INFO L225 Difference]: With dead ends: 523 [2022-02-15 02:04:37,618 INFO L226 Difference]: Without dead ends: 268 [2022-02-15 02:04:37,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27367 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=21375, Invalid=72567, Unknown=0, NotChecked=0, Total=93942 [2022-02-15 02:04:37,621 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 604 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 19306 mSolverCounterSat, 665 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 605 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 19971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 665 IncrementalHoareTripleChecker+Valid, 19306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:37,621 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [605 Valid, 57 Invalid, 19971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [665 Valid, 19306 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-02-15 02:04:37,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2022-02-15 02:04:37,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 268. [2022-02-15 02:04:37,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 261 states have (on average 1.0191570881226053) internal successors, (266), 262 states have internal predecessors, (266), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:37,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 272 transitions. [2022-02-15 02:04:37,630 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 272 transitions. Word has length 259 [2022-02-15 02:04:37,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:37,631 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 272 transitions. [2022-02-15 02:04:37,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.6451612903225807) internal successors, (255), 154 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:37,631 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 272 transitions. [2022-02-15 02:04:37,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-02-15 02:04:37,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:37,632 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:37,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 02:04:37,632 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:37,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:37,632 INFO L85 PathProgramCache]: Analyzing trace with hash -2092163837, now seen corresponding path program 54 times [2022-02-15 02:04:37,632 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:37,632 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939823383] [2022-02-15 02:04:37,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:37,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:37,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:37,705 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:37,722 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:37,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:37,761 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:37,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:38,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:38,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:38,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:42,356 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:42,357 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939823383] [2022-02-15 02:04:42,357 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939823383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:42,357 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:42,357 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-02-15 02:04:42,357 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016789345] [2022-02-15 02:04:42,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:42,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-02-15 02:04:42,357 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:42,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-02-15 02:04:42,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7397, Invalid=17409, Unknown=0, NotChecked=0, Total=24806 [2022-02-15 02:04:42,359 INFO L87 Difference]: Start difference. First operand 268 states and 272 transitions. Second operand has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:53,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:04:53,270 INFO L93 Difference]: Finished difference Result 533 states and 546 transitions. [2022-02-15 02:04:53,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 158 states. [2022-02-15 02:04:53,270 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-02-15 02:04:53,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:04:53,271 INFO L225 Difference]: With dead ends: 533 [2022-02-15 02:04:53,271 INFO L226 Difference]: Without dead ends: 273 [2022-02-15 02:04:53,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 311 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28450 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=22185, Invalid=75471, Unknown=0, NotChecked=0, Total=97656 [2022-02-15 02:04:53,275 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 722 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 20045 mSolverCounterSat, 782 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 723 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 20827 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 782 IncrementalHoareTripleChecker+Valid, 20045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:04:53,275 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [723 Valid, 37 Invalid, 20827 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [782 Valid, 20045 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 02:04:53,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-02-15 02:04:53,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 273. [2022-02-15 02:04:53,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 266 states have (on average 1.018796992481203) internal successors, (271), 267 states have internal predecessors, (271), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:04:53,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 277 transitions. [2022-02-15 02:04:53,284 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 277 transitions. Word has length 264 [2022-02-15 02:04:53,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:04:53,285 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 277 transitions. [2022-02-15 02:04:53,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 1.6455696202531647) internal successors, (260), 157 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:04:53,285 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 277 transitions. [2022-02-15 02:04:53,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-15 02:04:53,286 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:04:53,286 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:04:53,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 02:04:53,286 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:04:53,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:04:53,286 INFO L85 PathProgramCache]: Analyzing trace with hash -474069962, now seen corresponding path program 55 times [2022-02-15 02:04:53,286 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:04:53,286 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1077662463] [2022-02-15 02:04:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:04:53,336 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:53,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:53,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:53,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:53,434 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:04:53,434 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:04:53,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:04:53,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:04:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:04:54,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:04:57,538 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:04:57,539 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1077662463] [2022-02-15 02:04:57,539 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1077662463] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:04:57,539 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:04:57,539 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [161] imperfect sequences [] total 161 [2022-02-15 02:04:57,539 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1397325045] [2022-02-15 02:04:57,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:04:57,539 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2022-02-15 02:04:57,539 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:04:57,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2022-02-15 02:04:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7672, Invalid=18088, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 02:04:57,542 INFO L87 Difference]: Start difference. First operand 273 states and 277 transitions. Second operand has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:07,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:07,207 INFO L93 Difference]: Finished difference Result 543 states and 556 transitions. [2022-02-15 02:05:07,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-15 02:05:07,208 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 states have internal predecessors, (265), 2 states have call successors, (3), 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 269 [2022-02-15 02:05:07,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:07,208 INFO L225 Difference]: With dead ends: 543 [2022-02-15 02:05:07,209 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 02:05:07,211 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 426 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29554 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=23010, Invalid=78432, Unknown=0, NotChecked=0, Total=101442 [2022-02-15 02:05:07,212 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 529 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20882 mSolverCounterSat, 691 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 530 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 21573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 691 IncrementalHoareTripleChecker+Valid, 20882 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:07,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [530 Valid, 47 Invalid, 21573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [691 Valid, 20882 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 02:05:07,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 02:05:07,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-02-15 02:05:07,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 271 states have (on average 1.018450184501845) internal successors, (276), 272 states have internal predecessors, (276), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:07,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2022-02-15 02:05:07,221 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 269 [2022-02-15 02:05:07,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:07,221 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2022-02-15 02:05:07,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 161 states have (on average 1.6459627329192548) internal successors, (265), 160 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:07,222 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2022-02-15 02:05:07,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-15 02:05:07,222 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:07,222 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:07,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 02:05:07,223 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:07,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash -2056748233, now seen corresponding path program 56 times [2022-02-15 02:05:07,223 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:07,223 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784474464] [2022-02-15 02:05:07,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:07,276 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:07,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:07,294 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:07,312 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:07,363 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:07,363 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:07,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:07,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:08,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:08,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:08,152 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:11,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:11,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784474464] [2022-02-15 02:05:11,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784474464] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:11,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:11,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-02-15 02:05:11,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325349885] [2022-02-15 02:05:11,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:11,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-02-15 02:05:11,397 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:11,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-02-15 02:05:11,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7952, Invalid=18780, Unknown=0, NotChecked=0, Total=26732 [2022-02-15 02:05:11,404 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:22,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:22,623 INFO L93 Difference]: Finished difference Result 553 states and 566 transitions. [2022-02-15 02:05:22,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-15 02:05:22,623 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-02-15 02:05:22,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:22,624 INFO L225 Difference]: With dead ends: 553 [2022-02-15 02:05:22,624 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 02:05:22,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 323 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30679 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=23850, Invalid=81450, Unknown=0, NotChecked=0, Total=105300 [2022-02-15 02:05:22,629 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 749 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 21563 mSolverCounterSat, 707 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 750 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 22270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 707 IncrementalHoareTripleChecker+Valid, 21563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:22,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [750 Valid, 47 Invalid, 22270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [707 Valid, 21563 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 02:05:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 02:05:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 283. [2022-02-15 02:05:22,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 277 states have internal predecessors, (281), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:22,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 287 transitions. [2022-02-15 02:05:22,652 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 287 transitions. Word has length 274 [2022-02-15 02:05:22,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:22,653 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 287 transitions. [2022-02-15 02:05:22,653 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.646341463414634) internal successors, (270), 163 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:22,653 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 287 transitions. [2022-02-15 02:05:22,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-02-15 02:05:22,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:22,654 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:22,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 02:05:22,654 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 348743938, now seen corresponding path program 57 times [2022-02-15 02:05:22,654 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:22,654 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319437911] [2022-02-15 02:05:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:22,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:22,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:22,742 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:22,769 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:22,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:22,803 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:22,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:22,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:23,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:23,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:23,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:27,715 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:27,715 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319437911] [2022-02-15 02:05:27,715 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319437911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:27,715 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:27,716 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [167] imperfect sequences [] total 167 [2022-02-15 02:05:27,716 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455215392] [2022-02-15 02:05:27,716 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:27,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 167 states [2022-02-15 02:05:27,716 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:27,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 167 interpolants. [2022-02-15 02:05:27,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8237, Invalid=19485, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 02:05:27,718 INFO L87 Difference]: Start difference. First operand 283 states and 287 transitions. Second operand has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:05:40,036 INFO L93 Difference]: Finished difference Result 563 states and 576 transitions. [2022-02-15 02:05:40,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-15 02:05:40,037 INFO L78 Accepts]: Start accepts. Automaton has has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 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 279 [2022-02-15 02:05:40,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:05:40,038 INFO L225 Difference]: With dead ends: 563 [2022-02-15 02:05:40,038 INFO L226 Difference]: Without dead ends: 288 [2022-02-15 02:05:40,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 442 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31825 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=24705, Invalid=84525, Unknown=0, NotChecked=0, Total=109230 [2022-02-15 02:05:40,041 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 765 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 22433 mSolverCounterSat, 936 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 23369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 936 IncrementalHoareTripleChecker+Valid, 22433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:05:40,041 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 47 Invalid, 23369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [936 Valid, 22433 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 02:05:40,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-02-15 02:05:40,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-02-15 02:05:40,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 281 states have (on average 1.0177935943060499) internal successors, (286), 282 states have internal predecessors, (286), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:05:40,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 292 transitions. [2022-02-15 02:05:40,052 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 292 transitions. Word has length 279 [2022-02-15 02:05:40,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:05:40,052 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 292 transitions. [2022-02-15 02:05:40,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 167 states, 167 states have (on average 1.6467065868263473) internal successors, (275), 166 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:05:40,052 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 292 transitions. [2022-02-15 02:05:40,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-15 02:05:40,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:05:40,053 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:05:40,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 02:05:40,053 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:05:40,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:05:40,054 INFO L85 PathProgramCache]: Analyzing trace with hash -2035416213, now seen corresponding path program 58 times [2022-02-15 02:05:40,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:05:40,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [844327550] [2022-02-15 02:05:40,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:05:40,111 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:40,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:05:40,202 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:05:40,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:05:40,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:05:41,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:05:41,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:05:46,370 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:05:46,370 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [844327550] [2022-02-15 02:05:46,370 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [844327550] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:05:46,370 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:05:46,370 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-15 02:05:46,370 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655358860] [2022-02-15 02:05:46,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:05:46,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-15 02:05:46,371 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:05:46,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-15 02:05:46,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8527, Invalid=20203, Unknown=0, NotChecked=0, Total=28730 [2022-02-15 02:05:46,374 INFO L87 Difference]: Start difference. First operand 288 states and 292 transitions. Second operand has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:01,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:01,269 INFO L93 Difference]: Finished difference Result 573 states and 586 transitions. [2022-02-15 02:06:01,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-15 02:06:01,269 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-15 02:06:01,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:01,270 INFO L225 Difference]: With dead ends: 573 [2022-02-15 02:06:01,270 INFO L226 Difference]: Without dead ends: 293 [2022-02-15 02:06:01,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 450 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 335 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32992 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=25575, Invalid=87657, Unknown=0, NotChecked=0, Total=113232 [2022-02-15 02:06:01,276 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 449 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 23352 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 23968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 23352 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:01,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 87 Invalid, 23968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [616 Valid, 23352 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 02:06:01,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-15 02:06:01,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-02-15 02:06:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 286 states have (on average 1.0174825174825175) internal successors, (291), 287 states have internal predecessors, (291), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 297 transitions. [2022-02-15 02:06:01,286 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 297 transitions. Word has length 284 [2022-02-15 02:06:01,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:01,286 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 297 transitions. [2022-02-15 02:06:01,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.6470588235294117) internal successors, (280), 169 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:01,286 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 297 transitions. [2022-02-15 02:06:01,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-15 02:06:01,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:01,287 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:01,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 02:06:01,287 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:01,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:01,288 INFO L85 PathProgramCache]: Analyzing trace with hash 2122519502, now seen corresponding path program 59 times [2022-02-15 02:06:01,288 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:01,288 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806808245] [2022-02-15 02:06:01,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:01,326 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,358 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,359 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,438 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:01,439 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:01,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:01,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:02,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:06,401 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:06,401 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806808245] [2022-02-15 02:06:06,401 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [806808245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:06,401 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:06,402 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [173] imperfect sequences [] total 173 [2022-02-15 02:06:06,402 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261659638] [2022-02-15 02:06:06,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:06,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2022-02-15 02:06:06,402 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:06,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2022-02-15 02:06:06,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8822, Invalid=20934, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 02:06:06,404 INFO L87 Difference]: Start difference. First operand 293 states and 297 transitions. Second operand has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:19,156 INFO L93 Difference]: Finished difference Result 583 states and 596 transitions. [2022-02-15 02:06:19,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 02:06:19,156 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 states have internal predecessors, (285), 2 states have call successors, (3), 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 289 [2022-02-15 02:06:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:19,157 INFO L225 Difference]: With dead ends: 583 [2022-02-15 02:06:19,157 INFO L226 Difference]: Without dead ends: 298 [2022-02-15 02:06:19,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34180 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=26460, Invalid=90846, Unknown=0, NotChecked=0, Total=117306 [2022-02-15 02:06:19,162 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 345 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 24188 mSolverCounterSat, 520 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 24708 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 520 IncrementalHoareTripleChecker+Valid, 24188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:19,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 52 Invalid, 24708 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [520 Valid, 24188 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-15 02:06:19,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 298 states. [2022-02-15 02:06:19,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 298 to 298. [2022-02-15 02:06:19,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 291 states have (on average 1.0171821305841924) internal successors, (296), 292 states have internal predecessors, (296), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:19,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 302 transitions. [2022-02-15 02:06:19,172 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 302 transitions. Word has length 289 [2022-02-15 02:06:19,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:19,172 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 302 transitions. [2022-02-15 02:06:19,172 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 1.6473988439306357) internal successors, (285), 172 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:19,172 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 302 transitions. [2022-02-15 02:06:19,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-02-15 02:06:19,173 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:19,173 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:19,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 02:06:19,173 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:19,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:19,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1948081567, now seen corresponding path program 60 times [2022-02-15 02:06:19,174 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:19,174 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128468279] [2022-02-15 02:06:19,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:19,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,259 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:19,289 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,315 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:19,316 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:19,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:20,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:20,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:24,699 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:24,699 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128468279] [2022-02-15 02:06:24,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128468279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:24,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:24,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-15 02:06:24,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175968823] [2022-02-15 02:06:24,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:24,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-15 02:06:24,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:24,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-15 02:06:24,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9122, Invalid=21678, Unknown=0, NotChecked=0, Total=30800 [2022-02-15 02:06:24,703 INFO L87 Difference]: Start difference. First operand 298 states and 302 transitions. Second operand has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:37,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:37,076 INFO L93 Difference]: Finished difference Result 593 states and 606 transitions. [2022-02-15 02:06:37,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-15 02:06:37,076 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 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 294 [2022-02-15 02:06:37,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:37,077 INFO L225 Difference]: With dead ends: 593 [2022-02-15 02:06:37,077 INFO L226 Difference]: Without dead ends: 303 [2022-02-15 02:06:37,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 466 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 347 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35389 ImplicationChecksByTransitivity, 11.6s TimeCoverageRelationStatistics Valid=27360, Invalid=94092, Unknown=0, NotChecked=0, Total=121452 [2022-02-15 02:06:37,082 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 350 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 25159 mSolverCounterSat, 525 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25684 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 525 IncrementalHoareTripleChecker+Valid, 25159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:37,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 47 Invalid, 25684 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [525 Valid, 25159 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-15 02:06:37,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-02-15 02:06:37,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 303. [2022-02-15 02:06:37,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 303 states, 296 states have (on average 1.0168918918918919) internal successors, (301), 297 states have internal predecessors, (301), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:37,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 303 states to 303 states and 307 transitions. [2022-02-15 02:06:37,094 INFO L78 Accepts]: Start accepts. Automaton has 303 states and 307 transitions. Word has length 294 [2022-02-15 02:06:37,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:37,094 INFO L470 AbstractCegarLoop]: Abstraction has 303 states and 307 transitions. [2022-02-15 02:06:37,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.6477272727272727) internal successors, (290), 175 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:37,094 INFO L276 IsEmpty]: Start isEmpty. Operand 303 states and 307 transitions. [2022-02-15 02:06:37,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-15 02:06:37,104 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:37,104 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:37,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 02:06:37,104 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:37,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:37,105 INFO L85 PathProgramCache]: Analyzing trace with hash -972389222, now seen corresponding path program 61 times [2022-02-15 02:06:37,105 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:37,105 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1723906872] [2022-02-15 02:06:37,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:37,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:37,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:37,190 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:37,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:37,259 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:37,259 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:37,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:37,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:06:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:06:38,534 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:06:42,739 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:06:42,739 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1723906872] [2022-02-15 02:06:42,740 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1723906872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:06:42,740 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:06:42,740 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [179] imperfect sequences [] total 179 [2022-02-15 02:06:42,740 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177689350] [2022-02-15 02:06:42,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:06:42,740 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2022-02-15 02:06:42,740 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:06:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2022-02-15 02:06:42,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9427, Invalid=22435, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 02:06:42,743 INFO L87 Difference]: Start difference. First operand 303 states and 307 transitions. Second operand has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:58,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:06:58,863 INFO L93 Difference]: Finished difference Result 603 states and 616 transitions. [2022-02-15 02:06:58,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-15 02:06:58,864 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 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 299 [2022-02-15 02:06:58,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:06:58,865 INFO L225 Difference]: With dead ends: 603 [2022-02-15 02:06:58,865 INFO L226 Difference]: Without dead ends: 308 [2022-02-15 02:06:58,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 119 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36619 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=28275, Invalid=97395, Unknown=0, NotChecked=0, Total=125670 [2022-02-15 02:06:58,871 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 705 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 26002 mSolverCounterSat, 885 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 706 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 26887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 885 IncrementalHoareTripleChecker+Valid, 26002 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:06:58,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [706 Valid, 22 Invalid, 26887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [885 Valid, 26002 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 02:06:58,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-15 02:06:58,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 308. [2022-02-15 02:06:58,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 301 states have (on average 1.0166112956810631) internal successors, (306), 302 states have internal predecessors, (306), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:06:58,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 312 transitions. [2022-02-15 02:06:58,886 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 312 transitions. Word has length 299 [2022-02-15 02:06:58,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:06:58,886 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 312 transitions. [2022-02-15 02:06:58,886 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 1.6480446927374302) internal successors, (295), 178 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:06:58,886 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 312 transitions. [2022-02-15 02:06:58,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-02-15 02:06:58,887 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:06:58,887 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:06:58,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 02:06:58,888 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:06:58,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:06:58,888 INFO L85 PathProgramCache]: Analyzing trace with hash 1601655251, now seen corresponding path program 62 times [2022-02-15 02:06:58,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:06:58,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1037396681] [2022-02-15 02:06:58,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:06:58,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,928 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:58,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,964 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:06:58,965 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:06:58,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:06:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:00,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:03,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:03,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1037396681] [2022-02-15 02:07:03,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1037396681] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:03,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:03,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-02-15 02:07:03,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881784052] [2022-02-15 02:07:03,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:03,817 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-02-15 02:07:03,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:03,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-02-15 02:07:03,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9737, Invalid=23205, Unknown=0, NotChecked=0, Total=32942 [2022-02-15 02:07:03,820 INFO L87 Difference]: Start difference. First operand 308 states and 312 transitions. Second operand has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:17,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:17,581 INFO L93 Difference]: Finished difference Result 613 states and 626 transitions. [2022-02-15 02:07:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-02-15 02:07:17,595 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 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 304 [2022-02-15 02:07:17,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:17,596 INFO L225 Difference]: With dead ends: 613 [2022-02-15 02:07:17,596 INFO L226 Difference]: Without dead ends: 313 [2022-02-15 02:07:17,601 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 359 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37870 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=29205, Invalid=100755, Unknown=0, NotChecked=0, Total=129960 [2022-02-15 02:07:17,602 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 717 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26923 mSolverCounterSat, 547 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 718 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 27470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 547 IncrementalHoareTripleChecker+Valid, 26923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:17,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [718 Valid, 57 Invalid, 27470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [547 Valid, 26923 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-15 02:07:17,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-15 02:07:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 313. [2022-02-15 02:07:17,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 306 states have (on average 1.0163398692810457) internal successors, (311), 307 states have internal predecessors, (311), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:17,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 317 transitions. [2022-02-15 02:07:17,615 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 317 transitions. Word has length 304 [2022-02-15 02:07:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:17,615 INFO L470 AbstractCegarLoop]: Abstraction has 313 states and 317 transitions. [2022-02-15 02:07:17,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.6483516483516483) internal successors, (300), 181 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 317 transitions. [2022-02-15 02:07:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-15 02:07:17,616 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:17,616 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:17,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 02:07:17,616 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:17,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:17,617 INFO L85 PathProgramCache]: Analyzing trace with hash 431946598, now seen corresponding path program 63 times [2022-02-15 02:07:17,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:17,617 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2046520154] [2022-02-15 02:07:17,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:17,662 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,677 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,701 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:17,744 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:17,744 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:19,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:19,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:19,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:23,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:23,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2046520154] [2022-02-15 02:07:23,016 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2046520154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:23,016 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:23,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [185] imperfect sequences [] total 185 [2022-02-15 02:07:23,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505285712] [2022-02-15 02:07:23,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:23,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 185 states [2022-02-15 02:07:23,016 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:23,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 185 interpolants. [2022-02-15 02:07:23,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10052, Invalid=23988, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 02:07:23,020 INFO L87 Difference]: Start difference. First operand 313 states and 317 transitions. Second operand has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:36,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:36,200 INFO L93 Difference]: Finished difference Result 623 states and 636 transitions. [2022-02-15 02:07:36,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 02:07:36,201 INFO L78 Accepts]: Start accepts. Automaton has has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 states have internal predecessors, (305), 2 states have call successors, (3), 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 309 [2022-02-15 02:07:36,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:36,201 INFO L225 Difference]: With dead ends: 623 [2022-02-15 02:07:36,202 INFO L226 Difference]: Without dead ends: 318 [2022-02-15 02:07:36,207 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39142 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=30150, Invalid=104172, Unknown=0, NotChecked=0, Total=134322 [2022-02-15 02:07:36,208 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 609 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 27805 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 610 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 28361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 27805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:36,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [610 Valid, 62 Invalid, 28361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 27805 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-15 02:07:36,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-15 02:07:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 318. [2022-02-15 02:07:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 311 states have (on average 1.0160771704180065) internal successors, (316), 312 states have internal predecessors, (316), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:36,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 322 transitions. [2022-02-15 02:07:36,222 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 322 transitions. Word has length 309 [2022-02-15 02:07:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:36,222 INFO L470 AbstractCegarLoop]: Abstraction has 318 states and 322 transitions. [2022-02-15 02:07:36,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 185 states, 185 states have (on average 1.6486486486486487) internal successors, (305), 184 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:36,226 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 322 transitions. [2022-02-15 02:07:36,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-15 02:07:36,227 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:36,227 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:36,227 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 02:07:36,228 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:36,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:36,228 INFO L85 PathProgramCache]: Analyzing trace with hash -1556307961, now seen corresponding path program 64 times [2022-02-15 02:07:36,228 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:36,228 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182832982] [2022-02-15 02:07:36,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:36,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:36,274 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:36,274 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:36,300 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:36,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:36,360 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:36,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:36,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:37,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:37,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:37,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:07:41,131 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:07:41,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182832982] [2022-02-15 02:07:41,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182832982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:07:41,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:07:41,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-15 02:07:41,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545484458] [2022-02-15 02:07:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:07:41,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-15 02:07:41,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:07:41,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-15 02:07:41,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10372, Invalid=24784, Unknown=0, NotChecked=0, Total=35156 [2022-02-15 02:07:41,136 INFO L87 Difference]: Start difference. First operand 318 states and 322 transitions. Second operand has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:56,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:07:56,001 INFO L93 Difference]: Finished difference Result 633 states and 646 transitions. [2022-02-15 02:07:56,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-15 02:07:56,001 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 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 314 [2022-02-15 02:07:56,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:07:56,002 INFO L225 Difference]: With dead ends: 633 [2022-02-15 02:07:56,002 INFO L226 Difference]: Without dead ends: 323 [2022-02-15 02:07:56,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 371 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40435 ImplicationChecksByTransitivity, 12.6s TimeCoverageRelationStatistics Valid=31110, Invalid=107646, Unknown=0, NotChecked=0, Total=138756 [2022-02-15 02:07:56,007 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 619 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 28821 mSolverCounterSat, 808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 620 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 29629 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 808 IncrementalHoareTripleChecker+Valid, 28821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:07:56,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [620 Valid, 67 Invalid, 29629 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [808 Valid, 28821 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-15 02:07:56,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-02-15 02:07:56,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 323. [2022-02-15 02:07:56,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 316 states have (on average 1.0158227848101267) internal successors, (321), 317 states have internal predecessors, (321), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:07:56,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 327 transitions. [2022-02-15 02:07:56,018 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 327 transitions. Word has length 314 [2022-02-15 02:07:56,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:07:56,018 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 327 transitions. [2022-02-15 02:07:56,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.648936170212766) internal successors, (310), 187 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:07:56,018 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 327 transitions. [2022-02-15 02:07:56,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-02-15 02:07:56,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:07:56,019 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:07:56,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 02:07:56,019 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:07:56,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:07:56,019 INFO L85 PathProgramCache]: Analyzing trace with hash 222279730, now seen corresponding path program 65 times [2022-02-15 02:07:56,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:07:56,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [784722651] [2022-02-15 02:07:56,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:07:56,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,098 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,098 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:56,117 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:07:56,153 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:07:56,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:07:56,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:07:57,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:07:57,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:02,730 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:02,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [784722651] [2022-02-15 02:08:02,730 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [784722651] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:02,730 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:02,730 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [191] imperfect sequences [] total 191 [2022-02-15 02:08:02,730 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921462435] [2022-02-15 02:08:02,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:02,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 191 states [2022-02-15 02:08:02,731 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:02,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 191 interpolants. [2022-02-15 02:08:02,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10964, Invalid=26478, Unknown=0, NotChecked=0, Total=37442 [2022-02-15 02:08:02,735 INFO L87 Difference]: Start difference. First operand 323 states and 327 transitions. Second operand has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:18,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:18,612 INFO L93 Difference]: Finished difference Result 881 states and 894 transitions. [2022-02-15 02:08:18,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-15 02:08:18,612 INFO L78 Accepts]: Start accepts. Automaton has has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 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 319 [2022-02-15 02:08:18,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:18,614 INFO L225 Difference]: With dead ends: 881 [2022-02-15 02:08:18,614 INFO L226 Difference]: Without dead ends: 566 [2022-02-15 02:08:18,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 508 GetRequests, 127 SyntacticMatches, 1 SemanticMatches, 380 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42858 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=32357, Invalid=113185, Unknown=0, NotChecked=0, Total=145542 [2022-02-15 02:08:18,619 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 753 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 30307 mSolverCounterSat, 816 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 754 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 31123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 816 IncrementalHoareTripleChecker+Valid, 30307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:18,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [754 Valid, 37 Invalid, 31123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [816 Valid, 30307 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 02:08:18,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2022-02-15 02:08:18,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 566. [2022-02-15 02:08:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 559 states have (on average 1.0107334525939178) internal successors, (565), 560 states have internal predecessors, (565), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:18,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 571 transitions. [2022-02-15 02:08:18,640 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 571 transitions. Word has length 319 [2022-02-15 02:08:18,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:18,640 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 571 transitions. [2022-02-15 02:08:18,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 191 states, 191 states have (on average 1.649214659685864) internal successors, (315), 190 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 571 transitions. [2022-02-15 02:08:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 323 [2022-02-15 02:08:18,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:18,641 INFO L514 BasicCegarLoop]: trace histogram [122, 121, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:18,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 02:08:18,641 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:18,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash -6426698, now seen corresponding path program 66 times [2022-02-15 02:08:18,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:18,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [85492029] [2022-02-15 02:08:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:18,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:18,679 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:18,679 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:18,691 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:18,725 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:18,725 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:18,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:18,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:19,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:19,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:19,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:24,936 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:24,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [85492029] [2022-02-15 02:08:24,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [85492029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:24,936 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:24,936 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [193] imperfect sequences [] total 193 [2022-02-15 02:08:24,936 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319574236] [2022-02-15 02:08:24,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:24,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 193 states [2022-02-15 02:08:24,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:24,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 193 interpolants. [2022-02-15 02:08:24,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10957, Invalid=26099, Unknown=0, NotChecked=0, Total=37056 [2022-02-15 02:08:24,940 INFO L87 Difference]: Start difference. First operand 566 states and 571 transitions. Second operand has 193 states, 193 states have (on average 1.6476683937823835) internal successors, (318), 192 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:41,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:08:41,880 INFO L93 Difference]: Finished difference Result 889 states and 905 transitions. [2022-02-15 02:08:41,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-15 02:08:41,881 INFO L78 Accepts]: Start accepts. Automaton has has 193 states, 193 states have (on average 1.6476683937823835) internal successors, (318), 192 states have internal predecessors, (318), 2 states have call successors, (3), 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 322 [2022-02-15 02:08:41,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:08:41,882 INFO L225 Difference]: With dead ends: 889 [2022-02-15 02:08:41,882 INFO L226 Difference]: Without dead ends: 573 [2022-02-15 02:08:41,887 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42695 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=32865, Invalid=113441, Unknown=0, NotChecked=0, Total=146306 [2022-02-15 02:08:41,887 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 634 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 30184 mSolverCounterSat, 830 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 635 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 31014 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 830 IncrementalHoareTripleChecker+Valid, 30184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 02:08:41,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [635 Valid, 32 Invalid, 31014 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [830 Valid, 30184 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 02:08:41,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-02-15 02:08:41,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 331. [2022-02-15 02:08:41,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 324 states have (on average 1.0154320987654322) internal successors, (329), 325 states have internal predecessors, (329), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:08:41,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 335 transitions. [2022-02-15 02:08:41,899 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 335 transitions. Word has length 322 [2022-02-15 02:08:41,899 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:08:41,899 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 335 transitions. [2022-02-15 02:08:41,899 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 193 states, 193 states have (on average 1.6476683937823835) internal successors, (318), 192 states have internal predecessors, (318), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:08:41,899 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 335 transitions. [2022-02-15 02:08:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-02-15 02:08:41,900 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:08:41,900 INFO L514 BasicCegarLoop]: trace histogram [124, 123, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:08:41,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 02:08:41,900 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:08:41,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:08:41,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1153922973, now seen corresponding path program 67 times [2022-02-15 02:08:41,901 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:08:41,901 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921266245] [2022-02-15 02:08:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:08:41,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:41,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:41,995 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:42,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,071 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:08:42,071 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:08:42,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:08:42,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:43,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:08:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:08:43,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:08:48,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:08:48,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [921266245] [2022-02-15 02:08:48,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [921266245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:08:48,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:08:48,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [196] imperfect sequences [] total 196 [2022-02-15 02:08:48,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139390883] [2022-02-15 02:08:48,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:08:48,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-02-15 02:08:48,335 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:08:48,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-02-15 02:08:48,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11565, Invalid=27837, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 02:08:48,338 INFO L87 Difference]: Start difference. First operand 331 states and 335 transitions. Second operand has 196 states, 196 states have (on average 1.6479591836734695) internal successors, (323), 195 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:04,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:04,139 INFO L93 Difference]: Finished difference Result 903 states and 916 transitions. [2022-02-15 02:09:04,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 196 states. [2022-02-15 02:09:04,139 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 196 states have (on average 1.6479591836734695) internal successors, (323), 195 states have internal predecessors, (323), 2 states have call successors, (3), 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 327 [2022-02-15 02:09:04,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:04,140 INFO L225 Difference]: With dead ends: 903 [2022-02-15 02:09:04,140 INFO L226 Difference]: Without dead ends: 580 [2022-02-15 02:09:04,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 521 GetRequests, 130 SyntacticMatches, 1 SemanticMatches, 390 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45182 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=34146, Invalid=119126, Unknown=0, NotChecked=0, Total=153272 [2022-02-15 02:09:04,146 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 771 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31537 mSolverCounterSat, 836 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 772 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 32373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 836 IncrementalHoareTripleChecker+Valid, 31537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:04,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [772 Valid, 47 Invalid, 32373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [836 Valid, 31537 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-02-15 02:09:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-02-15 02:09:04,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 580. [2022-02-15 02:09:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 573 states have (on average 1.0104712041884816) internal successors, (579), 574 states have internal predecessors, (579), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:04,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 585 transitions. [2022-02-15 02:09:04,167 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 585 transitions. Word has length 327 [2022-02-15 02:09:04,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:04,167 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 585 transitions. [2022-02-15 02:09:04,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 196 states have (on average 1.6479591836734695) internal successors, (323), 195 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:04,167 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 585 transitions. [2022-02-15 02:09:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 331 [2022-02-15 02:09:04,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:04,168 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:04,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 02:09:04,168 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:04,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:04,169 INFO L85 PathProgramCache]: Analyzing trace with hash 975409317, now seen corresponding path program 68 times [2022-02-15 02:09:04,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:04,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061718896] [2022-02-15 02:09:04,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:04,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:04,246 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:04,246 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:04,272 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:04,309 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:04,309 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:04,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:04,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:05,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:05,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:09,731 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:09,731 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061718896] [2022-02-15 02:09:09,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061718896] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:09,731 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:09,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [198] imperfect sequences [] total 198 [2022-02-15 02:09:09,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027013323] [2022-02-15 02:09:09,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:09,732 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-02-15 02:09:09,732 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:09,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-02-15 02:09:09,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11558, Invalid=27448, Unknown=0, NotChecked=0, Total=39006 [2022-02-15 02:09:09,735 INFO L87 Difference]: Start difference. First operand 580 states and 585 transitions. Second operand has 198 states, 198 states have (on average 1.6464646464646464) internal successors, (326), 197 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:26,000 INFO L93 Difference]: Finished difference Result 911 states and 927 transitions. [2022-02-15 02:09:26,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-02-15 02:09:26,004 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 1.6464646464646464) internal successors, (326), 197 states have internal predecessors, (326), 2 states have call successors, (3), 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 330 [2022-02-15 02:09:26,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:26,006 INFO L225 Difference]: With dead ends: 911 [2022-02-15 02:09:26,006 INFO L226 Difference]: Without dead ends: 587 [2022-02-15 02:09:26,011 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 524 GetRequests, 131 SyntacticMatches, 2 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45016 ImplicationChecksByTransitivity, 13.5s TimeCoverageRelationStatistics Valid=34668, Invalid=119388, Unknown=0, NotChecked=0, Total=154056 [2022-02-15 02:09:26,011 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1033 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31766 mSolverCounterSat, 1235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1034 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 33001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1235 IncrementalHoareTripleChecker+Valid, 31766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:26,012 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1034 Valid, 52 Invalid, 33001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1235 Valid, 31766 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-02-15 02:09:26,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2022-02-15 02:09:26,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 339. [2022-02-15 02:09:26,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 332 states have (on average 1.0150602409638554) internal successors, (337), 333 states have internal predecessors, (337), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 343 transitions. [2022-02-15 02:09:26,024 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 343 transitions. Word has length 330 [2022-02-15 02:09:26,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:26,024 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 343 transitions. [2022-02-15 02:09:26,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 1.6464646464646464) internal successors, (326), 197 states have internal predecessors, (326), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:26,024 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 343 transitions. [2022-02-15 02:09:26,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-02-15 02:09:26,025 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:26,025 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:26,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 02:09:26,025 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:26,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:26,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1506619220, now seen corresponding path program 69 times [2022-02-15 02:09:26,026 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:26,026 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851405867] [2022-02-15 02:09:26,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:26,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:26,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:26,066 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:26,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:26,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:26,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:26,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:27,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:27,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:31,829 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:31,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851405867] [2022-02-15 02:09:31,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851405867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:31,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:31,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [201] imperfect sequences [] total 201 [2022-02-15 02:09:31,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59806043] [2022-02-15 02:09:31,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:31,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-02-15 02:09:31,830 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:31,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-02-15 02:09:31,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12182, Invalid=29230, Unknown=0, NotChecked=0, Total=41412 [2022-02-15 02:09:31,834 INFO L87 Difference]: Start difference. First operand 339 states and 343 transitions. Second operand has 201 states, 201 states have (on average 1.6467661691542288) internal successors, (331), 200 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:47,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:09:47,184 INFO L93 Difference]: Finished difference Result 925 states and 938 transitions. [2022-02-15 02:09:47,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 201 states. [2022-02-15 02:09:47,187 INFO L78 Accepts]: Start accepts. Automaton has has 201 states, 201 states have (on average 1.6467661691542288) internal successors, (331), 200 states have internal predecessors, (331), 2 states have call successors, (3), 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 335 [2022-02-15 02:09:47,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:09:47,189 INFO L225 Difference]: With dead ends: 925 [2022-02-15 02:09:47,189 INFO L226 Difference]: Without dead ends: 594 [2022-02-15 02:09:47,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 534 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 400 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47567 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=35983, Invalid=125219, Unknown=0, NotChecked=0, Total=161202 [2022-02-15 02:09:47,196 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 917 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 33098 mSolverCounterSat, 983 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 918 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 34081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 983 IncrementalHoareTripleChecker+Valid, 33098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:09:47,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [918 Valid, 27 Invalid, 34081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [983 Valid, 33098 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-02-15 02:09:47,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-02-15 02:09:47,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 594. [2022-02-15 02:09:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 587 states have (on average 1.010221465076661) internal successors, (593), 588 states have internal predecessors, (593), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:09:47,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 599 transitions. [2022-02-15 02:09:47,217 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 599 transitions. Word has length 335 [2022-02-15 02:09:47,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:09:47,217 INFO L470 AbstractCegarLoop]: Abstraction has 594 states and 599 transitions. [2022-02-15 02:09:47,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 201 states, 201 states have (on average 1.6467661691542288) internal successors, (331), 200 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:09:47,217 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 599 transitions. [2022-02-15 02:09:47,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 339 [2022-02-15 02:09:47,218 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:09:47,218 INFO L514 BasicCegarLoop]: trace histogram [128, 127, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:09:47,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 02:09:47,218 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:09:47,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:09:47,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1913834796, now seen corresponding path program 70 times [2022-02-15 02:09:47,219 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:09:47,219 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974477614] [2022-02-15 02:09:47,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:09:47,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:47,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:47,285 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:47,297 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:47,322 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:09:47,322 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:09:47,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:09:47,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:48,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:09:48,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:09:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:09:52,884 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:09:52,884 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974477614] [2022-02-15 02:09:52,884 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [974477614] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:09:52,884 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:09:52,885 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [203] imperfect sequences [] total 203 [2022-02-15 02:09:52,885 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097819985] [2022-02-15 02:09:52,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:09:52,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 203 states [2022-02-15 02:09:52,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:09:52,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 203 interpolants. [2022-02-15 02:09:52,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12175, Invalid=28831, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 02:09:52,889 INFO L87 Difference]: Start difference. First operand 594 states and 599 transitions. Second operand has 203 states, 203 states have (on average 1.645320197044335) internal successors, (334), 202 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:08,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:08,016 INFO L93 Difference]: Finished difference Result 933 states and 949 transitions. [2022-02-15 02:10:08,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 203 states. [2022-02-15 02:10:08,016 INFO L78 Accepts]: Start accepts. Automaton has has 203 states, 203 states have (on average 1.645320197044335) internal successors, (334), 202 states have internal predecessors, (334), 2 states have call successors, (3), 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 338 [2022-02-15 02:10:08,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:08,018 INFO L225 Difference]: With dead ends: 933 [2022-02-15 02:10:08,018 INFO L226 Difference]: Without dead ends: 601 [2022-02-15 02:10:08,025 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 537 GetRequests, 134 SyntacticMatches, 2 SemanticMatches, 401 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47398 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=36519, Invalid=125487, Unknown=0, NotChecked=0, Total=162006 [2022-02-15 02:10:08,025 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 924 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 33150 mSolverCounterSat, 348 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 925 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 33498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 348 IncrementalHoareTripleChecker+Valid, 33150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:08,025 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [925 Valid, 42 Invalid, 33498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [348 Valid, 33150 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-15 02:10:08,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2022-02-15 02:10:08,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 347. [2022-02-15 02:10:08,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 340 states have (on average 1.0147058823529411) internal successors, (345), 341 states have internal predecessors, (345), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 351 transitions. [2022-02-15 02:10:08,038 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 351 transitions. Word has length 338 [2022-02-15 02:10:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:08,038 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 351 transitions. [2022-02-15 02:10:08,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 203 states, 203 states have (on average 1.645320197044335) internal successors, (334), 202 states have internal predecessors, (334), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 351 transitions. [2022-02-15 02:10:08,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-02-15 02:10:08,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:08,039 INFO L514 BasicCegarLoop]: trace histogram [130, 129, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:08,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 02:10:08,039 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:08,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:08,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2077490437, now seen corresponding path program 71 times [2022-02-15 02:10:08,040 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:08,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2086013746] [2022-02-15 02:10:08,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:08,065 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:08,081 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:08,081 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:08,096 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:08,123 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:08,124 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:08,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:08,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:09,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:09,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:09,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:13,797 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:13,798 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2086013746] [2022-02-15 02:10:13,798 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2086013746] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:13,798 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:13,798 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [206] imperfect sequences [] total 206 [2022-02-15 02:10:13,798 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845379449] [2022-02-15 02:10:13,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:13,799 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 206 states [2022-02-15 02:10:13,799 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:13,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 206 interpolants. [2022-02-15 02:10:13,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12527, Invalid=29703, Unknown=0, NotChecked=0, Total=42230 [2022-02-15 02:10:13,802 INFO L87 Difference]: Start difference. First operand 347 states and 351 transitions. Second operand has 206 states, 206 states have (on average 1.645631067961165) internal successors, (339), 205 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:29,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:29,554 INFO L93 Difference]: Finished difference Result 691 states and 704 transitions. [2022-02-15 02:10:29,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 206 states. [2022-02-15 02:10:29,554 INFO L78 Accepts]: Start accepts. Automaton has has 206 states, 206 states have (on average 1.645631067961165) internal successors, (339), 205 states have internal predecessors, (339), 2 states have call successors, (3), 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 343 [2022-02-15 02:10:29,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:29,555 INFO L225 Difference]: With dead ends: 691 [2022-02-15 02:10:29,555 INFO L226 Difference]: Without dead ends: 352 [2022-02-15 02:10:29,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 545 GetRequests, 136 SyntacticMatches, 2 SemanticMatches, 407 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48820 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=37575, Invalid=129297, Unknown=0, NotChecked=0, Total=166872 [2022-02-15 02:10:29,561 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 673 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 34263 mSolverCounterSat, 749 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 674 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 35012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 749 IncrementalHoareTripleChecker+Valid, 34263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:29,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [674 Valid, 62 Invalid, 35012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [749 Valid, 34263 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2022-02-15 02:10:29,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-02-15 02:10:29,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-02-15 02:10:29,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 345 states have (on average 1.0144927536231885) internal successors, (350), 346 states have internal predecessors, (350), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:29,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 356 transitions. [2022-02-15 02:10:29,573 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 356 transitions. Word has length 343 [2022-02-15 02:10:29,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:29,573 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 356 transitions. [2022-02-15 02:10:29,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 206 states, 206 states have (on average 1.645631067961165) internal successors, (339), 205 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:29,573 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 356 transitions. [2022-02-15 02:10:29,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 349 [2022-02-15 02:10:29,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:29,574 INFO L514 BasicCegarLoop]: trace histogram [132, 131, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:29,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 02:10:29,575 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:29,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:29,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1722900536, now seen corresponding path program 72 times [2022-02-15 02:10:29,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:29,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513202127] [2022-02-15 02:10:29,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:29,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,626 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:29,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,670 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:29,670 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:29,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:31,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:31,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:31,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:36,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:36,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513202127] [2022-02-15 02:10:36,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [513202127] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:36,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:36,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [209] imperfect sequences [] total 209 [2022-02-15 02:10:36,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845359154] [2022-02-15 02:10:36,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:36,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 209 states [2022-02-15 02:10:36,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:36,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 209 interpolants. [2022-02-15 02:10:36,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13176, Invalid=31556, Unknown=0, NotChecked=0, Total=44732 [2022-02-15 02:10:36,102 INFO L87 Difference]: Start difference. First operand 352 states and 356 transitions. Second operand has 209 states, 209 states have (on average 1.645933014354067) internal successors, (344), 208 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:53,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:10:53,170 INFO L93 Difference]: Finished difference Result 961 states and 974 transitions. [2022-02-15 02:10:53,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 209 states. [2022-02-15 02:10:53,171 INFO L78 Accepts]: Start accepts. Automaton has has 209 states, 209 states have (on average 1.645933014354067) internal successors, (344), 208 states have internal predecessors, (344), 2 states have call successors, (3), 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 348 [2022-02-15 02:10:53,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:10:53,172 INFO L225 Difference]: With dead ends: 961 [2022-02-15 02:10:53,172 INFO L226 Difference]: Without dead ends: 617 [2022-02-15 02:10:53,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 555 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 416 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51474 ImplicationChecksByTransitivity, 14.8s TimeCoverageRelationStatistics Valid=38943, Invalid=135363, Unknown=0, NotChecked=0, Total=174306 [2022-02-15 02:10:53,187 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 1223 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 36027 mSolverCounterSat, 1292 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1224 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 37319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1292 IncrementalHoareTripleChecker+Valid, 36027 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:10:53,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1224 Valid, 52 Invalid, 37319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1292 Valid, 36027 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-02-15 02:10:53,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 617 states. [2022-02-15 02:10:53,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 617 to 617. [2022-02-15 02:10:53,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 617 states, 610 states have (on average 1.0098360655737706) internal successors, (616), 611 states have internal predecessors, (616), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:10:53,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 617 states to 617 states and 622 transitions. [2022-02-15 02:10:53,224 INFO L78 Accepts]: Start accepts. Automaton has 617 states and 622 transitions. Word has length 348 [2022-02-15 02:10:53,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:10:53,224 INFO L470 AbstractCegarLoop]: Abstraction has 617 states and 622 transitions. [2022-02-15 02:10:53,224 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 209 states, 209 states have (on average 1.645933014354067) internal successors, (344), 208 states have internal predecessors, (344), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:10:53,224 INFO L276 IsEmpty]: Start isEmpty. Operand 617 states and 622 transitions. [2022-02-15 02:10:53,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-02-15 02:10:53,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:10:53,225 INFO L514 BasicCegarLoop]: trace histogram [133, 132, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:10:53,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 02:10:53,243 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:10:53,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:10:53,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1456423286, now seen corresponding path program 73 times [2022-02-15 02:10:53,243 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:10:53,244 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024936859] [2022-02-15 02:10:53,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:10:53,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:53,295 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:53,295 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:53,306 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:53,332 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:10:53,333 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:10:53,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:10:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:54,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:10:54,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:10:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:10:59,159 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:10:59,159 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024936859] [2022-02-15 02:10:59,159 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024936859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:10:59,159 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:10:59,159 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [211] imperfect sequences [] total 211 [2022-02-15 02:10:59,159 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856529347] [2022-02-15 02:10:59,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:10:59,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 211 states [2022-02-15 02:10:59,160 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:10:59,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 211 interpolants. [2022-02-15 02:10:59,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13169, Invalid=31141, Unknown=0, NotChecked=0, Total=44310 [2022-02-15 02:10:59,164 INFO L87 Difference]: Start difference. First operand 617 states and 622 transitions. Second operand has 211 states, 211 states have (on average 1.6445497630331753) internal successors, (347), 210 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:15,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:15,676 INFO L93 Difference]: Finished difference Result 969 states and 985 transitions. [2022-02-15 02:11:15,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 211 states. [2022-02-15 02:11:15,676 INFO L78 Accepts]: Start accepts. Automaton has has 211 states, 211 states have (on average 1.6445497630331753) internal successors, (347), 210 states have internal predecessors, (347), 2 states have call successors, (3), 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 351 [2022-02-15 02:11:15,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:15,678 INFO L225 Difference]: With dead ends: 969 [2022-02-15 02:11:15,678 INFO L226 Difference]: Without dead ends: 624 [2022-02-15 02:11:15,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 139 SyntacticMatches, 2 SemanticMatches, 417 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51299 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=39501, Invalid=135641, Unknown=0, NotChecked=0, Total=175142 [2022-02-15 02:11:15,684 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 960 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 35839 mSolverCounterSat, 905 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 961 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 36744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 905 IncrementalHoareTripleChecker+Valid, 35839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.3s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:15,684 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [961 Valid, 52 Invalid, 36744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [905 Valid, 35839 Invalid, 0 Unknown, 0 Unchecked, 7.3s Time] [2022-02-15 02:11:15,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-02-15 02:11:15,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 360. [2022-02-15 02:11:15,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 353 states have (on average 1.0141643059490084) internal successors, (358), 354 states have internal predecessors, (358), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:15,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 364 transitions. [2022-02-15 02:11:15,696 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 364 transitions. Word has length 351 [2022-02-15 02:11:15,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:15,696 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 364 transitions. [2022-02-15 02:11:15,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 211 states, 211 states have (on average 1.6445497630331753) internal successors, (347), 210 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:15,697 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 364 transitions. [2022-02-15 02:11:15,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 357 [2022-02-15 02:11:15,709 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:15,709 INFO L514 BasicCegarLoop]: trace histogram [135, 134, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:15,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 02:11:15,709 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:15,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:15,710 INFO L85 PathProgramCache]: Analyzing trace with hash -508297353, now seen corresponding path program 74 times [2022-02-15 02:11:15,710 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:15,710 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981691961] [2022-02-15 02:11:15,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:15,744 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:15,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:15,775 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:15,800 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:15,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:15,833 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:15,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:15,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:16,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:17,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:17,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:23,290 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:23,290 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981691961] [2022-02-15 02:11:23,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1981691961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:23,291 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:23,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [214] imperfect sequences [] total 214 [2022-02-15 02:11:23,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672968835] [2022-02-15 02:11:23,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:23,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 214 states [2022-02-15 02:11:23,291 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:23,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 214 interpolants. [2022-02-15 02:11:23,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13535, Invalid=32047, Unknown=0, NotChecked=0, Total=45582 [2022-02-15 02:11:23,295 INFO L87 Difference]: Start difference. First operand 360 states and 364 transitions. Second operand has 214 states, 214 states have (on average 1.644859813084112) internal successors, (352), 213 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:40,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:11:40,871 INFO L93 Difference]: Finished difference Result 717 states and 730 transitions. [2022-02-15 02:11:40,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2022-02-15 02:11:40,872 INFO L78 Accepts]: Start accepts. Automaton has has 214 states, 214 states have (on average 1.644859813084112) internal successors, (352), 213 states have internal predecessors, (352), 2 states have call successors, (3), 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 356 [2022-02-15 02:11:40,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:11:40,873 INFO L225 Difference]: With dead ends: 717 [2022-02-15 02:11:40,873 INFO L226 Difference]: Without dead ends: 365 [2022-02-15 02:11:40,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 566 GetRequests, 141 SyntacticMatches, 2 SemanticMatches, 423 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52778 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=40599, Invalid=139601, Unknown=0, NotChecked=0, Total=180200 [2022-02-15 02:11:40,881 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 837 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 36909 mSolverCounterSat, 1053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 838 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 37962 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1053 IncrementalHoareTripleChecker+Valid, 36909 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-02-15 02:11:40,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [838 Valid, 42 Invalid, 37962 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1053 Valid, 36909 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-02-15 02:11:40,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 365 states. [2022-02-15 02:11:40,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 365 to 365. [2022-02-15 02:11:40,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 358 states have (on average 1.0139664804469273) internal successors, (363), 359 states have internal predecessors, (363), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:11:40,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 369 transitions. [2022-02-15 02:11:40,894 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 369 transitions. Word has length 356 [2022-02-15 02:11:40,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:11:40,895 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 369 transitions. [2022-02-15 02:11:40,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 214 states, 214 states have (on average 1.644859813084112) internal successors, (352), 213 states have internal predecessors, (352), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:11:40,895 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 369 transitions. [2022-02-15 02:11:40,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 362 [2022-02-15 02:11:40,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:11:40,896 INFO L514 BasicCegarLoop]: trace histogram [137, 136, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:11:40,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 02:11:40,896 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:11:40,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:11:40,896 INFO L85 PathProgramCache]: Analyzing trace with hash 964137794, now seen corresponding path program 75 times [2022-02-15 02:11:40,896 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:11:40,896 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375407637] [2022-02-15 02:11:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:11:40,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,938 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,938 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:40,955 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,980 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:11:40,980 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:11:40,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:11:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:42,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:11:42,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:11:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:11:50,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:11:50,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375407637] [2022-02-15 02:11:50,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375407637] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:11:50,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:11:50,802 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [217] imperfect sequences [] total 217 [2022-02-15 02:11:50,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426162894] [2022-02-15 02:11:50,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:11:50,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 217 states [2022-02-15 02:11:50,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:11:50,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 217 interpolants. [2022-02-15 02:11:50,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13906, Invalid=32966, Unknown=0, NotChecked=0, Total=46872 [2022-02-15 02:11:50,807 INFO L87 Difference]: Start difference. First operand 365 states and 369 transitions. Second operand has 217 states, 217 states have (on average 1.6451612903225807) internal successors, (357), 216 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:17,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:17,324 INFO L93 Difference]: Finished difference Result 727 states and 740 transitions. [2022-02-15 02:12:17,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 217 states. [2022-02-15 02:12:17,324 INFO L78 Accepts]: Start accepts. Automaton has has 217 states, 217 states have (on average 1.6451612903225807) internal successors, (357), 216 states have internal predecessors, (357), 2 states have call successors, (3), 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 361 [2022-02-15 02:12:17,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:17,325 INFO L225 Difference]: With dead ends: 727 [2022-02-15 02:12:17,326 INFO L226 Difference]: Without dead ends: 370 [2022-02-15 02:12:17,333 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 574 GetRequests, 143 SyntacticMatches, 2 SemanticMatches, 429 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54278 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=41712, Invalid=143618, Unknown=0, NotChecked=0, Total=185330 [2022-02-15 02:12:17,333 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 289 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 38049 mSolverCounterSat, 511 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 38560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 511 IncrementalHoareTripleChecker+Valid, 38049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.8s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:17,333 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [290 Valid, 32 Invalid, 38560 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [511 Valid, 38049 Invalid, 0 Unknown, 0 Unchecked, 11.8s Time] [2022-02-15 02:12:17,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2022-02-15 02:12:17,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 370. [2022-02-15 02:12:17,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 363 states have (on average 1.0137741046831956) internal successors, (368), 364 states have internal predecessors, (368), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:17,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 374 transitions. [2022-02-15 02:12:17,345 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 374 transitions. Word has length 361 [2022-02-15 02:12:17,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:17,346 INFO L470 AbstractCegarLoop]: Abstraction has 370 states and 374 transitions. [2022-02-15 02:12:17,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 217 states, 217 states have (on average 1.6451612903225807) internal successors, (357), 216 states have internal predecessors, (357), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:17,346 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 374 transitions. [2022-02-15 02:12:17,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 367 [2022-02-15 02:12:17,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:17,347 INFO L514 BasicCegarLoop]: trace histogram [139, 138, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:17,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 02:12:17,347 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:17,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:17,348 INFO L85 PathProgramCache]: Analyzing trace with hash 843715243, now seen corresponding path program 76 times [2022-02-15 02:12:17,348 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:17,348 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1437412367] [2022-02-15 02:12:17,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:17,385 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:17,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:17,414 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:17,432 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:17,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:17,469 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:17,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:19,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:19,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:19,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:26,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:26,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1437412367] [2022-02-15 02:12:26,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1437412367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:26,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:26,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [220] imperfect sequences [] total 220 [2022-02-15 02:12:26,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451104131] [2022-02-15 02:12:26,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:26,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 220 states [2022-02-15 02:12:26,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:26,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 220 interpolants. [2022-02-15 02:12:26,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14282, Invalid=33898, Unknown=0, NotChecked=0, Total=48180 [2022-02-15 02:12:26,108 INFO L87 Difference]: Start difference. First operand 370 states and 374 transitions. Second operand has 220 states, 220 states have (on average 1.6454545454545455) internal successors, (362), 219 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:12:44,302 INFO L93 Difference]: Finished difference Result 737 states and 750 transitions. [2022-02-15 02:12:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2022-02-15 02:12:44,303 INFO L78 Accepts]: Start accepts. Automaton has has 220 states, 220 states have (on average 1.6454545454545455) internal successors, (362), 219 states have internal predecessors, (362), 2 states have call successors, (3), 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 366 [2022-02-15 02:12:44,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:12:44,304 INFO L225 Difference]: With dead ends: 737 [2022-02-15 02:12:44,304 INFO L226 Difference]: Without dead ends: 375 [2022-02-15 02:12:44,311 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 582 GetRequests, 145 SyntacticMatches, 2 SemanticMatches, 435 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55799 ImplicationChecksByTransitivity, 17.7s TimeCoverageRelationStatistics Valid=42840, Invalid=147692, Unknown=0, NotChecked=0, Total=190532 [2022-02-15 02:12:44,312 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 577 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 39075 mSolverCounterSat, 656 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 578 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 39731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 656 IncrementalHoareTripleChecker+Valid, 39075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:12:44,312 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [578 Valid, 47 Invalid, 39731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [656 Valid, 39075 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-02-15 02:12:44,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2022-02-15 02:12:44,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 375. [2022-02-15 02:12:44,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 368 states have (on average 1.013586956521739) internal successors, (373), 369 states have internal predecessors, (373), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:12:44,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 379 transitions. [2022-02-15 02:12:44,325 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 379 transitions. Word has length 366 [2022-02-15 02:12:44,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:12:44,325 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 379 transitions. [2022-02-15 02:12:44,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 220 states, 220 states have (on average 1.6454545454545455) internal successors, (362), 219 states have internal predecessors, (362), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:12:44,325 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 379 transitions. [2022-02-15 02:12:44,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-02-15 02:12:44,326 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:12:44,326 INFO L514 BasicCegarLoop]: trace histogram [141, 140, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:12:44,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 02:12:44,326 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:12:44,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:12:44,327 INFO L85 PathProgramCache]: Analyzing trace with hash 415165198, now seen corresponding path program 77 times [2022-02-15 02:12:44,327 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:12:44,327 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2088350715] [2022-02-15 02:12:44,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:12:44,352 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:44,364 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:44,364 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:44,377 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:44,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:12:44,411 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:12:44,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:12:44,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:45,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:12:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:12:45,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:12:50,871 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:12:50,872 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2088350715] [2022-02-15 02:12:50,872 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2088350715] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:12:50,872 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:12:50,872 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [223] imperfect sequences [] total 223 [2022-02-15 02:12:50,872 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881299849] [2022-02-15 02:12:50,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:12:50,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 223 states [2022-02-15 02:12:50,872 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:12:50,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 223 interpolants. [2022-02-15 02:12:50,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14663, Invalid=34843, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 02:12:50,877 INFO L87 Difference]: Start difference. First operand 375 states and 379 transitions. Second operand has 223 states, 223 states have (on average 1.6457399103139014) internal successors, (367), 222 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:09,052 INFO L93 Difference]: Finished difference Result 747 states and 760 transitions. [2022-02-15 02:13:09,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 223 states. [2022-02-15 02:13:09,052 INFO L78 Accepts]: Start accepts. Automaton has has 223 states, 223 states have (on average 1.6457399103139014) internal successors, (367), 222 states have internal predecessors, (367), 2 states have call successors, (3), 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 371 [2022-02-15 02:13:09,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:09,054 INFO L225 Difference]: With dead ends: 747 [2022-02-15 02:13:09,054 INFO L226 Difference]: Without dead ends: 380 [2022-02-15 02:13:09,062 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 147 SyntacticMatches, 2 SemanticMatches, 441 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57341 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=43983, Invalid=151823, Unknown=0, NotChecked=0, Total=195806 [2022-02-15 02:13:09,063 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 872 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 40473 mSolverCounterSat, 1097 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41570 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1097 IncrementalHoareTripleChecker+Valid, 40473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.1s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:09,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 57 Invalid, 41570 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1097 Valid, 40473 Invalid, 0 Unknown, 0 Unchecked, 8.1s Time] [2022-02-15 02:13:09,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2022-02-15 02:13:09,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 380. [2022-02-15 02:13:09,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 373 states have (on average 1.0134048257372654) internal successors, (378), 374 states have internal predecessors, (378), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:09,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 384 transitions. [2022-02-15 02:13:09,076 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 384 transitions. Word has length 371 [2022-02-15 02:13:09,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:09,076 INFO L470 AbstractCegarLoop]: Abstraction has 380 states and 384 transitions. [2022-02-15 02:13:09,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 223 states, 223 states have (on average 1.6457399103139014) internal successors, (367), 222 states have internal predecessors, (367), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 384 transitions. [2022-02-15 02:13:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 377 [2022-02-15 02:13:09,077 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:09,078 INFO L514 BasicCegarLoop]: trace histogram [143, 142, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:09,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 02:13:09,078 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:09,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:09,078 INFO L85 PathProgramCache]: Analyzing trace with hash -981368865, now seen corresponding path program 78 times [2022-02-15 02:13:09,078 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:09,078 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [597053088] [2022-02-15 02:13:09,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:09,119 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:09,131 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:09,131 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:09,142 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:09,169 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:09,169 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:09,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:09,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:10,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:10,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:10,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:18,386 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:18,386 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [597053088] [2022-02-15 02:13:18,386 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [597053088] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:18,386 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:18,386 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [226] imperfect sequences [] total 226 [2022-02-15 02:13:18,386 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056883818] [2022-02-15 02:13:18,386 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:18,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 226 states [2022-02-15 02:13:18,387 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:18,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 226 interpolants. [2022-02-15 02:13:18,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15049, Invalid=35801, Unknown=0, NotChecked=0, Total=50850 [2022-02-15 02:13:18,408 INFO L87 Difference]: Start difference. First operand 380 states and 384 transitions. Second operand has 226 states, 226 states have (on average 1.6460176991150441) internal successors, (372), 225 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:46,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 02:13:46,797 INFO L93 Difference]: Finished difference Result 757 states and 770 transitions. [2022-02-15 02:13:46,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 226 states. [2022-02-15 02:13:46,798 INFO L78 Accepts]: Start accepts. Automaton has has 226 states, 226 states have (on average 1.6460176991150441) internal successors, (372), 225 states have internal predecessors, (372), 2 states have call successors, (3), 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 376 [2022-02-15 02:13:46,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 02:13:46,799 INFO L225 Difference]: With dead ends: 757 [2022-02-15 02:13:46,799 INFO L226 Difference]: Without dead ends: 385 [2022-02-15 02:13:46,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 598 GetRequests, 149 SyntacticMatches, 2 SemanticMatches, 447 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58904 ImplicationChecksByTransitivity, 23.8s TimeCoverageRelationStatistics Valid=45141, Invalid=156011, Unknown=0, NotChecked=0, Total=201152 [2022-02-15 02:13:46,806 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 884 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 41436 mSolverCounterSat, 968 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 885 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 42404 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 968 IncrementalHoareTripleChecker+Valid, 41436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.6s IncrementalHoareTripleChecker+Time [2022-02-15 02:13:46,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [885 Valid, 52 Invalid, 42404 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [968 Valid, 41436 Invalid, 0 Unknown, 0 Unchecked, 12.6s Time] [2022-02-15 02:13:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-15 02:13:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-02-15 02:13:46,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 378 states have (on average 1.0132275132275133) internal successors, (383), 379 states have internal predecessors, (383), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 02:13:46,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 389 transitions. [2022-02-15 02:13:46,819 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 389 transitions. Word has length 376 [2022-02-15 02:13:46,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 02:13:46,819 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 389 transitions. [2022-02-15 02:13:46,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 226 states, 226 states have (on average 1.6460176991150441) internal successors, (372), 225 states have internal predecessors, (372), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 02:13:46,819 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 389 transitions. [2022-02-15 02:13:46,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 382 [2022-02-15 02:13:46,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 02:13:46,820 INFO L514 BasicCegarLoop]: trace histogram [145, 144, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 02:13:46,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 02:13:46,821 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 02:13:46,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 02:13:46,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1460369190, now seen corresponding path program 79 times [2022-02-15 02:13:46,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 02:13:46,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345924953] [2022-02-15 02:13:46,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 02:13:46,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:46,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:46,880 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:46,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:46,956 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 02:13:46,956 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 02:13:46,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 02:13:46,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:49,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 02:13:49,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 02:13:49,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 02:13:55,468 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 02:13:55,468 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345924953] [2022-02-15 02:13:55,469 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345924953] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 02:13:55,469 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 02:13:55,469 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [229] imperfect sequences [] total 229 [2022-02-15 02:13:55,469 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422783874] [2022-02-15 02:13:55,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 02:13:55,469 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 229 states [2022-02-15 02:13:55,469 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 02:13:55,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 229 interpolants. [2022-02-15 02:13:55,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15759, Invalid=37833, Unknown=0, NotChecked=0, Total=53592 [2022-02-15 02:13:55,474 INFO L87 Difference]: Start difference. First operand 385 states and 389 transitions. Second operand has 229 states, 229 states have (on average 1.6462882096069869) internal successors, (377), 228 states have internal predecessors, (377), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)