/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 23:13:10,009 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 23:13:10,010 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 23:13:10,032 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-01-31 23:13:10,033 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-01-31 23:13:10,033 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-01-31 23:13:10,034 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-01-31 23:13:10,061 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-01-31 23:13:10,063 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-01-31 23:13:10,063 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-01-31 23:13:10,064 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-01-31 23:13:10,064 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-01-31 23:13:10,065 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 23:13:10,065 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 23:13:10,066 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 23:13:10,066 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 23:13:10,067 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 23:13:10,067 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 23:13:10,072 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 23:13:10,073 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 23:13:10,074 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 23:13:10,077 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 23:13:10,078 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 23:13:10,078 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 23:13:10,080 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-01-31 23:13:10,080 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-01-31 23:13:10,080 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-01-31 23:13:10,081 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-01-31 23:13:10,081 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-01-31 23:13:10,082 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-01-31 23:13:10,082 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-01-31 23:13:10,082 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-01-31 23:13:10,083 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-01-31 23:13:10,088 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-01-31 23:13:10,090 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-01-31 23:13:10,091 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-01-31 23:13:10,091 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-01-31 23:13:10,091 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-01-31 23:13:10,091 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 23:13:10,092 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 23:13:10,093 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 23:13:10,093 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-01-31 23:13:10,102 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 23:13:10,102 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 23:13:10,104 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 23:13:10,104 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 23:13:10,105 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 23:13:10,105 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 23:13:10,105 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 23:13:10,105 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 23:13:10,105 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 23:13:10,106 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 23:13:10,106 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:13:10,106 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 23:13:10,106 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 23:13:10,106 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 23:13:10,106 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-01-31 23:13:10,106 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 23:13:10,270 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 23:13:10,283 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 23:13:10,284 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 23:13:10,285 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 23:13:10,286 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 23:13:10,287 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2022-01-31 23:13:10,333 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d26e3f64/a88676565d5a41a7903dbaea02321afd/FLAG2b43e6584 [2022-01-31 23:13:10,697 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 23:13:10,698 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2022-01-31 23:13:10,701 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d26e3f64/a88676565d5a41a7903dbaea02321afd/FLAG2b43e6584 [2022-01-31 23:13:10,709 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9d26e3f64/a88676565d5a41a7903dbaea02321afd [2022-01-31 23:13:10,710 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 23:13:10,711 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 23:13:10,714 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 23:13:10,714 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 23:13:10,716 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 23:13:10,716 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32483329 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10, skipping insertion in model container [2022-01-31 23:13:10,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,721 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 23:13:10,732 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 23:13:10,825 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c[408,421] [2022-01-31 23:13:10,852 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:13:10,856 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 23:13:10,863 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c[408,421] [2022-01-31 23:13:10,866 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 23:13:10,874 INFO L208 MainTranslator]: Completed translation [2022-01-31 23:13:10,874 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10 WrapperNode [2022-01-31 23:13:10,874 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 23:13:10,875 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 23:13:10,875 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 23:13:10,875 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 23:13:10,881 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,881 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,885 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,885 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,891 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,894 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,895 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 23:13:10,896 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 23:13:10,896 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 23:13:10,896 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 23:13:10,897 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (1/1) ... [2022-01-31 23:13:10,911 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 23:13:10,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 23:13:10,934 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) [2022-01-31 23:13:10,938 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 [2022-01-31 23:13:10,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 23:13:10,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 23:13:10,959 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 23:13:10,959 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 23:13:10,959 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 23:13:10,959 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 23:13:10,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 23:13:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 23:13:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 23:13:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 23:13:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 23:13:10,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 23:13:10,999 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 23:13:11,000 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 23:13:11,087 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 23:13:11,090 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 23:13:11,090 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 23:13:11,092 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:13:11 BoogieIcfgContainer [2022-01-31 23:13:11,092 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 23:13:11,093 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 23:13:11,093 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 23:13:11,095 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 23:13:11,095 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 11:13:10" (1/3) ... [2022-01-31 23:13:11,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac9ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:13:11, skipping insertion in model container [2022-01-31 23:13:11,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 11:13:10" (2/3) ... [2022-01-31 23:13:11,096 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7ac9ebc9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 11:13:11, skipping insertion in model container [2022-01-31 23:13:11,096 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 11:13:11" (3/3) ... [2022-01-31 23:13:11,097 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2022-01-31 23:13:11,100 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 23:13:11,100 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 23:13:11,126 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 23:13:11,130 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=QVASR [2022-01-31 23:13:11,131 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 23:13:11,139 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 23:13:11,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 23:13:11,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:11,144 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:11,144 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:11,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:11,148 INFO L85 PathProgramCache]: Analyzing trace with hash -250895125, now seen corresponding path program 1 times [2022-01-31 23:13:11,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:11,153 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [959317654] [2022-01-31 23:13:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:11,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:11,189 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:11,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:11,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:11,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:11,317 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:11,317 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [959317654] [2022-01-31 23:13:11,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [959317654] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:11,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:11,319 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 23:13:11,319 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207450348] [2022-01-31 23:13:11,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:11,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 23:13:11,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:11,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 23:13:11,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:13:11,348 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:13:11,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:11,411 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-31 23:13:11,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 23:13:11,415 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-31 23:13:11,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:11,420 INFO L225 Difference]: With dead ends: 55 [2022-01-31 23:13:11,421 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 23:13:11,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 23:13:11,430 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:11,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 23:13:11,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 23:13:11,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 23:13:11,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 23:13:11,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-31 23:13:11,466 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2022-01-31 23:13:11,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:11,467 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-31 23:13:11,467 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:13:11,467 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-31 23:13:11,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 23:13:11,468 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:11,469 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:11,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 23:13:11,469 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:11,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:11,472 INFO L85 PathProgramCache]: Analyzing trace with hash -570898901, now seen corresponding path program 1 times [2022-01-31 23:13:11,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:11,472 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1606796296] [2022-01-31 23:13:11,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:11,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:11,487 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:11,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:11,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:11,617 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:11,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1606796296] [2022-01-31 23:13:11,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1606796296] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:11,617 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:11,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 23:13:11,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443899643] [2022-01-31 23:13:11,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:11,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 23:13:11,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:11,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 23:13:11,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 23:13:11,619 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:13:11,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:11,719 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-31 23:13:11,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 23:13:11,719 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-31 23:13:11,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:11,721 INFO L225 Difference]: With dead ends: 44 [2022-01-31 23:13:11,721 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 23:13:11,724 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:13:11,726 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:11,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:13:11,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 23:13:11,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-31 23:13:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 23:13:11,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-31 23:13:11,740 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-31 23:13:11,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:11,742 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-31 23:13:11,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:13:11,743 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-31 23:13:11,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 23:13:11,745 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:11,749 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:11,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 23:13:11,750 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:11,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:11,750 INFO L85 PathProgramCache]: Analyzing trace with hash 1004158473, now seen corresponding path program 1 times [2022-01-31 23:13:11,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:11,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1577813352] [2022-01-31 23:13:11,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:11,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:11,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:11,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:11,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:11,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:11,898 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 23:13:11,899 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:11,899 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1577813352] [2022-01-31 23:13:11,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1577813352] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:11,899 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:11,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 23:13:11,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313993821] [2022-01-31 23:13:11,899 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:11,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 23:13:11,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:11,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 23:13:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 23:13:11,900 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:13:12,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:12,031 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-01-31 23:13:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 23:13:12,031 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-01-31 23:13:12,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:12,032 INFO L225 Difference]: With dead ends: 48 [2022-01-31 23:13:12,032 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 23:13:12,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-31 23:13:12,035 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:12,035 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:13:12,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 23:13:12,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-01-31 23:13:12,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 23:13:12,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 23:13:12,042 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2022-01-31 23:13:12,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:12,042 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 23:13:12,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 23:13:12,042 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 23:13:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 23:13:12,043 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:12,043 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:12,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 23:13:12,043 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:12,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:12,044 INFO L85 PathProgramCache]: Analyzing trace with hash -1489160601, now seen corresponding path program 2 times [2022-01-31 23:13:12,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:12,044 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873959039] [2022-01-31 23:13:12,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:12,044 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:12,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:12,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:12,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:12,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:12,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:12,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873959039] [2022-01-31 23:13:12,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1873959039] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:12,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:12,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 23:13:12,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175874439] [2022-01-31 23:13:12,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:12,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 23:13:12,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:12,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 23:13:12,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 23:13:12,234 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:13:12,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:12,494 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-01-31 23:13:12,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 23:13:12,495 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-31 23:13:12,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:12,496 INFO L225 Difference]: With dead ends: 44 [2022-01-31 23:13:12,497 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 23:13:12,498 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:13:12,504 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:12,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 55 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:13:12,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 23:13:12,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-31 23:13:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 23:13:12,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 23:13:12,533 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2022-01-31 23:13:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:12,533 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 23:13:12,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 23:13:12,533 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 23:13:12,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 23:13:12,535 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:12,535 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:12,535 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 23:13:12,535 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:12,536 INFO L85 PathProgramCache]: Analyzing trace with hash -1914575047, now seen corresponding path program 1 times [2022-01-31 23:13:12,536 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:12,536 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313770599] [2022-01-31 23:13:12,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:12,537 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:12,538 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:12,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:12,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:13:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:12,780 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:12,780 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:12,780 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313770599] [2022-01-31 23:13:12,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313770599] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:12,780 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:12,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 23:13:12,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559374708] [2022-01-31 23:13:12,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:12,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 23:13:12,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:12,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 23:13:12,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 23:13:12,781 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:13:13,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:13,041 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-01-31 23:13:13,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:13:13,042 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-01-31 23:13:13,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:13,045 INFO L225 Difference]: With dead ends: 48 [2022-01-31 23:13:13,045 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 23:13:13,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:13:13,046 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:13,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:13:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 23:13:13,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-01-31 23:13:13,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 23:13:13,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 23:13:13,056 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2022-01-31 23:13:13,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:13,056 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 23:13:13,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 23:13:13,056 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 23:13:13,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 23:13:13,057 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:13,057 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:13,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 23:13:13,057 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:13,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:13,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1022993931, now seen corresponding path program 2 times [2022-01-31 23:13:13,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:13,058 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035325141] [2022-01-31 23:13:13,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:13,058 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:13,059 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:13,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:13,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:13,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:13,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:13:13,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:13,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:13,299 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:13,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:13,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035325141] [2022-01-31 23:13:13,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035325141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:13,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:13,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:13:13,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359004105] [2022-01-31 23:13:13,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:13,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:13:13,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:13,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:13:13,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:13:13,300 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:13:13,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:13,824 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2022-01-31 23:13:13,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:13:13,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2022-01-31 23:13:13,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:13,827 INFO L225 Difference]: With dead ends: 69 [2022-01-31 23:13:13,828 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 23:13:13,828 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:13:13,829 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:13,829 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 72 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:13:13,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 23:13:13,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-01-31 23:13:13,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 23:13:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-01-31 23:13:13,856 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2022-01-31 23:13:13,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:13,856 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-01-31 23:13:13,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:13:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-01-31 23:13:13,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 23:13:13,857 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:13,857 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:13,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 23:13:13,857 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:13,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:13,857 INFO L85 PathProgramCache]: Analyzing trace with hash -417430807, now seen corresponding path program 3 times [2022-01-31 23:13:13,858 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:13,858 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1344868214] [2022-01-31 23:13:13,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:13,858 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:13,859 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:13,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:14,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:13:14,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:14,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:14,158 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:14,158 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1344868214] [2022-01-31 23:13:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1344868214] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:14,158 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 23:13:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259067627] [2022-01-31 23:13:14,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:14,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 23:13:14,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:14,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 23:13:14,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-31 23:13:14,159 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:13:14,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:14,665 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-01-31 23:13:14,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:13:14,666 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-01-31 23:13:14,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:14,667 INFO L225 Difference]: With dead ends: 79 [2022-01-31 23:13:14,667 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 23:13:14,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:13:14,668 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:14,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:13:14,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 23:13:14,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-01-31 23:13:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 23:13:14,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-31 23:13:14,677 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2022-01-31 23:13:14,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:14,677 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-31 23:13:14,677 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 23:13:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-31 23:13:14,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 23:13:14,678 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:14,678 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:14,678 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 23:13:14,678 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:14,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:14,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1335259869, now seen corresponding path program 4 times [2022-01-31 23:13:14,678 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:14,678 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [79283731] [2022-01-31 23:13:14,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:14,679 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:14,680 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:14,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:15,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:15,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:15,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 23:13:15,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:15,170 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:15,170 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:15,170 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [79283731] [2022-01-31 23:13:15,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [79283731] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:15,170 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:15,170 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:13:15,170 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953820603] [2022-01-31 23:13:15,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:15,170 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:13:15,170 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:15,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:13:15,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:13:15,171 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:15,704 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-01-31 23:13:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:13:15,704 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-01-31 23:13:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:15,705 INFO L225 Difference]: With dead ends: 77 [2022-01-31 23:13:15,705 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 23:13:15,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:13:15,706 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:15,706 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 69 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:13:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 23:13:15,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 23:13:15,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 23:13:15,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 23:13:15,716 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 52 [2022-01-31 23:13:15,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:15,716 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 23:13:15,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:15,716 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 23:13:15,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 23:13:15,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:15,717 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:15,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 23:13:15,717 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:15,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash -126381637, now seen corresponding path program 5 times [2022-01-31 23:13:15,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:15,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1460604434] [2022-01-31 23:13:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:15,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:15,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:15,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:16,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:16,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:13:16,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:16,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:16,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,103 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:16,103 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:16,103 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1460604434] [2022-01-31 23:13:16,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1460604434] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:16,103 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:16,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 23:13:16,103 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1212422529] [2022-01-31 23:13:16,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:16,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 23:13:16,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:16,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 23:13:16,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-31 23:13:16,104 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:16,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:16,558 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-01-31 23:13:16,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 23:13:16,559 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2022-01-31 23:13:16,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:16,559 INFO L225 Difference]: With dead ends: 83 [2022-01-31 23:13:16,559 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 23:13:16,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:13:16,565 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:16,565 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:13:16,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 23:13:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-01-31 23:13:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 23:13:16,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-01-31 23:13:16,591 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 54 [2022-01-31 23:13:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:16,591 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-01-31 23:13:16,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-01-31 23:13:16,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 23:13:16,596 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:16,596 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:16,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 23:13:16,597 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:16,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:16,597 INFO L85 PathProgramCache]: Analyzing trace with hash -309563111, now seen corresponding path program 6 times [2022-01-31 23:13:16,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:16,597 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375655829] [2022-01-31 23:13:16,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:16,597 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:16,601 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:16,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:16,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:16,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:16,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:16,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:17,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:17,003 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:17,003 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375655829] [2022-01-31 23:13:17,003 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375655829] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:17,003 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:17,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:13:17,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064666859] [2022-01-31 23:13:17,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:17,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:13:17,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:17,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:13:17,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:13:17,005 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:17,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:17,477 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-01-31 23:13:17,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 23:13:17,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2022-01-31 23:13:17,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:17,478 INFO L225 Difference]: With dead ends: 93 [2022-01-31 23:13:17,478 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 23:13:17,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:13:17,479 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 59 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:17,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:13:17,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 23:13:17,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-01-31 23:13:17,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 23:13:17,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-01-31 23:13:17,489 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-01-31 23:13:17,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:17,489 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-01-31 23:13:17,489 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 23:13:17,489 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-01-31 23:13:17,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 23:13:17,490 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:17,490 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:17,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 23:13:17,490 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -16404851, now seen corresponding path program 7 times [2022-01-31 23:13:17,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:17,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218197094] [2022-01-31 23:13:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:17,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:17,492 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:17,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:17,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:17,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:13:17,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:17,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:17,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:17,957 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:17,957 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:17,957 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218197094] [2022-01-31 23:13:17,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [218197094] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:17,958 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:17,958 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:13:17,958 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079252880] [2022-01-31 23:13:17,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:17,958 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:13:17,958 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:17,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:13:17,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:13:17,959 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:18,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:18,840 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-01-31 23:13:18,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 23:13:18,840 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2022-01-31 23:13:18,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:18,841 INFO L225 Difference]: With dead ends: 95 [2022-01-31 23:13:18,841 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 23:13:18,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:13:18,842 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:18,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:13:18,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 23:13:18,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-01-31 23:13:18,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 23:13:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 23:13:18,859 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 62 [2022-01-31 23:13:18,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:18,859 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 23:13:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 23:13:18,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 23:13:18,859 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:18,860 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:18,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 23:13:18,860 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:18,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:18,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1377021973, now seen corresponding path program 8 times [2022-01-31 23:13:18,860 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:18,860 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1317815863] [2022-01-31 23:13:18,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:18,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:18,861 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:18,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:19,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:19,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:19,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:19,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:19,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:19,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:19,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1317815863] [2022-01-31 23:13:19,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1317815863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:19,217 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:19,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:13:19,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015324517] [2022-01-31 23:13:19,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:19,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:13:19,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:19,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:13:19,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:13:19,218 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:20,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:20,108 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2022-01-31 23:13:20,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:13:20,111 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 64 [2022-01-31 23:13:20,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:20,112 INFO L225 Difference]: With dead ends: 120 [2022-01-31 23:13:20,112 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 23:13:20,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:13:20,113 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:20,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 99 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:13:20,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 23:13:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2022-01-31 23:13:20,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 23:13:20,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-01-31 23:13:20,131 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 64 [2022-01-31 23:13:20,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:20,131 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-01-31 23:13:20,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:20,131 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-01-31 23:13:20,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 23:13:20,132 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:20,132 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:20,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 23:13:20,132 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:20,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:20,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1034949065, now seen corresponding path program 9 times [2022-01-31 23:13:20,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:20,133 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492666117] [2022-01-31 23:13:20,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:20,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:20,134 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:20,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:20,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:20,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:20,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:20,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:20,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:20,416 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:20,416 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492666117] [2022-01-31 23:13:20,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [492666117] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:20,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:20,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:13:20,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126224577] [2022-01-31 23:13:20,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:20,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:13:20,417 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:20,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:13:20,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:13:20,417 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:21,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:21,148 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2022-01-31 23:13:21,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:13:21,148 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-01-31 23:13:21,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:21,149 INFO L225 Difference]: With dead ends: 108 [2022-01-31 23:13:21,149 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 23:13:21,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:13:21,150 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:21,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 104 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:13:21,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 23:13:21,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2022-01-31 23:13:21,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 23:13:21,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-31 23:13:21,163 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2022-01-31 23:13:21,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:21,163 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-31 23:13:21,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 23:13:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-31 23:13:21,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 23:13:21,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:21,164 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:21,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 23:13:21,164 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:21,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:21,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1277503137, now seen corresponding path program 10 times [2022-01-31 23:13:21,164 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:21,164 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915398158] [2022-01-31 23:13:21,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:21,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:21,165 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:21,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:21,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:13:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:21,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:13:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:21,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:21,635 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:21,635 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915398158] [2022-01-31 23:13:21,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915398158] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:21,635 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:21,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:13:21,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532383737] [2022-01-31 23:13:21,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:21,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:13:21,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:21,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:13:21,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:13:21,636 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:22,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:22,297 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-01-31 23:13:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:13:22,297 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2022-01-31 23:13:22,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:22,298 INFO L225 Difference]: With dead ends: 111 [2022-01-31 23:13:22,298 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 23:13:22,299 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:13:22,299 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:22,299 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 69 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:13:22,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 23:13:22,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2022-01-31 23:13:22,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 74 states have internal predecessors, (75), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 23:13:22,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-01-31 23:13:22,322 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 70 [2022-01-31 23:13:22,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:22,323 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-01-31 23:13:22,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:22,323 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-01-31 23:13:22,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 23:13:22,323 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:22,323 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:22,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 23:13:22,323 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:22,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1749992259, now seen corresponding path program 11 times [2022-01-31 23:13:22,324 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:22,324 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182088285] [2022-01-31 23:13:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:22,324 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:22,325 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:22,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:22,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:22,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:22,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:22,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:22,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:22,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:22,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:22,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:22,802 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:22,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182088285] [2022-01-31 23:13:22,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1182088285] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:22,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:22,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:13:22,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289682079] [2022-01-31 23:13:22,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:22,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:13:22,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:22,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:13:22,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:13:22,803 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:23,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:23,555 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2022-01-31 23:13:23,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 23:13:23,556 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 72 [2022-01-31 23:13:23,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:23,557 INFO L225 Difference]: With dead ends: 140 [2022-01-31 23:13:23,557 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 23:13:23,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:13:23,558 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 87 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:23,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 90 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:13:23,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 23:13:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 100. [2022-01-31 23:13:23,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 23:13:23,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2022-01-31 23:13:23,584 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 72 [2022-01-31 23:13:23,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:23,584 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2022-01-31 23:13:23,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:23,585 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2022-01-31 23:13:23,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 23:13:23,585 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:23,585 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:23,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 23:13:23,585 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:23,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:23,586 INFO L85 PathProgramCache]: Analyzing trace with hash -545505125, now seen corresponding path program 12 times [2022-01-31 23:13:23,586 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:23,586 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790393334] [2022-01-31 23:13:23,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:23,586 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:23,587 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:23,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:23,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:23,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:23,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:23,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:23,982 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:23,982 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790393334] [2022-01-31 23:13:23,982 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790393334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:23,982 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:23,982 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 23:13:23,982 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21698324] [2022-01-31 23:13:23,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:23,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 23:13:23,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:23,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 23:13:23,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-31 23:13:23,983 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:24,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:24,723 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-01-31 23:13:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 23:13:24,723 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 74 [2022-01-31 23:13:24,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:24,724 INFO L225 Difference]: With dead ends: 139 [2022-01-31 23:13:24,724 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 23:13:24,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:13:24,725 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:24,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 101 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:13:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 23:13:24,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 102. [2022-01-31 23:13:24,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 78 states have internal predecessors, (81), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 23:13:24,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2022-01-31 23:13:24,752 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 74 [2022-01-31 23:13:24,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:24,752 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2022-01-31 23:13:24,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:24,753 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2022-01-31 23:13:24,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 23:13:24,753 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:24,753 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:24,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 23:13:24,753 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:24,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:24,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1620428025, now seen corresponding path program 13 times [2022-01-31 23:13:24,754 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:24,754 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066730891] [2022-01-31 23:13:24,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:24,754 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:24,755 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:24,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:25,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:25,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:25,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:25,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:13:25,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:13:25,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:13:25,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:25,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:25,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066730891] [2022-01-31 23:13:25,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066730891] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:25,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:25,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 23:13:25,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967301988] [2022-01-31 23:13:25,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:25,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 23:13:25,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:25,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 23:13:25,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-01-31 23:13:25,155 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:25,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:25,968 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2022-01-31 23:13:25,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 23:13:25,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 76 [2022-01-31 23:13:25,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:25,969 INFO L225 Difference]: With dead ends: 123 [2022-01-31 23:13:25,969 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 23:13:25,970 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:13:25,970 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:25,970 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 118 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:13:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 23:13:25,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2022-01-31 23:13:25,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:13:25,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 23:13:25,988 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 76 [2022-01-31 23:13:25,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:25,988 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 23:13:25,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 23:13:25,988 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 23:13:25,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 23:13:25,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:25,989 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:25,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 23:13:25,989 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:25,989 INFO L85 PathProgramCache]: Analyzing trace with hash -1643572687, now seen corresponding path program 14 times [2022-01-31 23:13:25,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:25,989 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707972433] [2022-01-31 23:13:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:25,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:25,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:25,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:26,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 23:13:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:26,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:26,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:26,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:13:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:13:26,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,080 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:26,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:26,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707972433] [2022-01-31 23:13:26,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [707972433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:26,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:26,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 23:13:26,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202267333] [2022-01-31 23:13:26,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:26,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 23:13:26,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:26,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 23:13:26,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-31 23:13:26,081 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:26,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:26,337 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-01-31 23:13:26,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 23:13:26,337 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 78 [2022-01-31 23:13:26,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:26,338 INFO L225 Difference]: With dead ends: 116 [2022-01-31 23:13:26,338 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 23:13:26,338 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:13:26,338 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:26,339 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 62 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 23:13:26,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 23:13:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 23:13:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 23:13:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-01-31 23:13:26,357 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 78 [2022-01-31 23:13:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:26,357 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-01-31 23:13:26,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-01-31 23:13:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 23:13:26,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:26,358 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:26,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 23:13:26,358 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash 871184271, now seen corresponding path program 15 times [2022-01-31 23:13:26,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:26,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [925325010] [2022-01-31 23:13:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:26,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:26,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:26,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:26,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:26,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:26,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:26,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:26,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:26,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:13:26,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:26,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:26,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:26,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [925325010] [2022-01-31 23:13:26,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [925325010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:26,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:26,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:13:26,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387347041] [2022-01-31 23:13:26,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:26,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:13:26,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:26,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:13:26,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:13:26,861 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:27,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:27,830 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-01-31 23:13:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 23:13:27,831 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 80 [2022-01-31 23:13:27,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:27,831 INFO L225 Difference]: With dead ends: 121 [2022-01-31 23:13:27,831 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 23:13:27,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:13:27,832 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:27,832 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 108 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:13:27,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 23:13:27,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-01-31 23:13:27,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 23:13:27,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2022-01-31 23:13:27,865 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 80 [2022-01-31 23:13:27,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:27,865 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2022-01-31 23:13:27,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:27,866 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2022-01-31 23:13:27,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 23:13:27,867 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:27,867 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:27,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 23:13:27,867 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:27,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:27,868 INFO L85 PathProgramCache]: Analyzing trace with hash -513966739, now seen corresponding path program 16 times [2022-01-31 23:13:27,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:27,868 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112685247] [2022-01-31 23:13:27,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:27,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:27,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:27,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:28,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:13:28,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:28,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:28,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:28,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112685247] [2022-01-31 23:13:28,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112685247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:28,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:28,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:13:28,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594619648] [2022-01-31 23:13:28,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:28,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:13:28,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:28,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:13:28,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:13:28,325 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:29,612 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2022-01-31 23:13:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 23:13:29,612 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 82 [2022-01-31 23:13:29,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:29,615 INFO L225 Difference]: With dead ends: 154 [2022-01-31 23:13:29,615 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 23:13:29,615 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:13:29,616 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:29,616 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 123 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:13:29,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 23:13:29,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2022-01-31 23:13:29,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 87 states have internal predecessors, (89), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 23:13:29,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2022-01-31 23:13:29,650 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 82 [2022-01-31 23:13:29,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:29,650 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2022-01-31 23:13:29,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:29,650 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2022-01-31 23:13:29,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 23:13:29,651 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:29,651 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:29,651 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 23:13:29,651 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:29,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:29,651 INFO L85 PathProgramCache]: Analyzing trace with hash -204225589, now seen corresponding path program 17 times [2022-01-31 23:13:29,651 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:29,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727068151] [2022-01-31 23:13:29,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:29,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:29,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:29,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:30,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:30,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:30,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:30,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:13:30,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:13:30,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:13:30,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:13:30,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:30,077 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:30,077 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727068151] [2022-01-31 23:13:30,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1727068151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:30,077 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:30,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:13:30,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101991427] [2022-01-31 23:13:30,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:30,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:13:30,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:30,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:13:30,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:13:30,078 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:31,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:31,395 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2022-01-31 23:13:31,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 23:13:31,396 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 84 [2022-01-31 23:13:31,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:31,397 INFO L225 Difference]: With dead ends: 157 [2022-01-31 23:13:31,397 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 23:13:31,398 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:13:31,398 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:31,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 130 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:31,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 23:13:31,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2022-01-31 23:13:31,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 23:13:31,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2022-01-31 23:13:31,441 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 84 [2022-01-31 23:13:31,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:31,441 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2022-01-31 23:13:31,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:31,442 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2022-01-31 23:13:31,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 23:13:31,442 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:31,442 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:31,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 23:13:31,442 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:31,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1104276137, now seen corresponding path program 18 times [2022-01-31 23:13:31,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:31,443 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13383866] [2022-01-31 23:13:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:31,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:31,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:31,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:31,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:31,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:31,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:31,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:13:31,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:13:31,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:13:31,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:31,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:31,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:31,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13383866] [2022-01-31 23:13:31,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [13383866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:31,931 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:31,931 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:13:31,931 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439919069] [2022-01-31 23:13:31,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:31,931 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:13:31,931 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:31,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:13:31,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:13:31,931 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:33,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:33,335 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-01-31 23:13:33,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:13:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 86 [2022-01-31 23:13:33,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:33,340 INFO L225 Difference]: With dead ends: 137 [2022-01-31 23:13:33,340 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 23:13:33,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:13:33,341 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 82 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:33,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 134 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:33,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 23:13:33,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2022-01-31 23:13:33,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 23:13:33,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-01-31 23:13:33,364 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 86 [2022-01-31 23:13:33,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:33,364 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-01-31 23:13:33,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 23:13:33,364 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-01-31 23:13:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 23:13:33,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:33,365 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:33,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 23:13:33,365 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:33,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:33,365 INFO L85 PathProgramCache]: Analyzing trace with hash -642629535, now seen corresponding path program 19 times [2022-01-31 23:13:33,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:33,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680350275] [2022-01-31 23:13:33,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:33,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:33,366 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:34,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:34,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:34,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:34,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:34,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:13:34,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:13:34,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:34,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:34,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680350275] [2022-01-31 23:13:34,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [680350275] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:34,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:34,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 23:13:34,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412706402] [2022-01-31 23:13:34,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:34,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 23:13:34,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:34,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 23:13:34,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-01-31 23:13:34,109 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:35,360 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-01-31 23:13:35,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 23:13:35,360 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 88 [2022-01-31 23:13:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:35,361 INFO L225 Difference]: With dead ends: 133 [2022-01-31 23:13:35,361 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 23:13:35,362 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:13:35,365 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:35,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 105 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 23:13:35,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 23:13:35,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2022-01-31 23:13:35,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 94 states have internal predecessors, (95), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 23:13:35,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2022-01-31 23:13:35,412 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 88 [2022-01-31 23:13:35,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:35,412 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2022-01-31 23:13:35,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:35,413 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2022-01-31 23:13:35,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 23:13:35,413 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:35,413 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:35,413 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 23:13:35,413 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:35,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:35,414 INFO L85 PathProgramCache]: Analyzing trace with hash 476432447, now seen corresponding path program 20 times [2022-01-31 23:13:35,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:35,414 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653492080] [2022-01-31 23:13:35,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:35,414 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:35,415 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:35,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:35,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:35,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:35,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:35,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:13:35,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:13:35,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:35,930 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:35,930 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:35,930 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653492080] [2022-01-31 23:13:35,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [653492080] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:35,930 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:35,930 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 23:13:35,930 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791359004] [2022-01-31 23:13:35,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:35,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 23:13:35,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:35,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 23:13:35,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2022-01-31 23:13:35,931 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:37,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:37,245 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2022-01-31 23:13:37,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 23:13:37,246 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 90 [2022-01-31 23:13:37,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:37,246 INFO L225 Difference]: With dead ends: 170 [2022-01-31 23:13:37,246 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 23:13:37,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:13:37,251 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:37,251 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 118 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:13:37,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 23:13:37,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2022-01-31 23:13:37,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 23:13:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2022-01-31 23:13:37,295 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 90 [2022-01-31 23:13:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:37,295 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2022-01-31 23:13:37,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2022-01-31 23:13:37,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 23:13:37,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:37,296 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:37,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 23:13:37,296 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:37,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:37,296 INFO L85 PathProgramCache]: Analyzing trace with hash -2141794147, now seen corresponding path program 21 times [2022-01-31 23:13:37,296 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:37,296 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [733010814] [2022-01-31 23:13:37,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:37,297 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:37,297 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:37,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:37,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:37,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:37,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:37,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:13:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:13:37,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:13:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:13:37,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:13:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:37,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:37,950 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:37,950 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [733010814] [2022-01-31 23:13:37,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [733010814] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:37,950 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:37,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:13:37,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210930178] [2022-01-31 23:13:37,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:37,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:13:37,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:37,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:13:37,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:13:37,951 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:39,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:39,592 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2022-01-31 23:13:39,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 23:13:39,592 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 92 [2022-01-31 23:13:39,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:39,593 INFO L225 Difference]: With dead ends: 173 [2022-01-31 23:13:39,593 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 23:13:39,594 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:13:39,594 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:39,594 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 129 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:39,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 23:13:39,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-01-31 23:13:39,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 98 states have internal predecessors, (101), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 23:13:39,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2022-01-31 23:13:39,650 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 92 [2022-01-31 23:13:39,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:39,650 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2022-01-31 23:13:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2022-01-31 23:13:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 23:13:39,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:39,653 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:39,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 23:13:39,653 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:39,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:39,653 INFO L85 PathProgramCache]: Analyzing trace with hash -1406715525, now seen corresponding path program 22 times [2022-01-31 23:13:39,653 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:39,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [276504590] [2022-01-31 23:13:39,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:39,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:39,659 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:39,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:40,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:40,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:40,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:40,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:13:40,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:13:40,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:13:40,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:13:40,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:40,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:40,128 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:40,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [276504590] [2022-01-31 23:13:40,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [276504590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:40,128 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:40,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:13:40,129 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151726890] [2022-01-31 23:13:40,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:40,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:13:40,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:40,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:13:40,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:13:40,130 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:41,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:41,736 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2022-01-31 23:13:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 23:13:41,737 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 94 [2022-01-31 23:13:41,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:41,738 INFO L225 Difference]: With dead ends: 176 [2022-01-31 23:13:41,738 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 23:13:41,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=3015, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:13:41,739 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:41,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 23:13:41,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2022-01-31 23:13:41,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 100 states have internal predecessors, (104), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 23:13:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2022-01-31 23:13:41,787 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 94 [2022-01-31 23:13:41,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:41,787 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2022-01-31 23:13:41,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:41,787 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2022-01-31 23:13:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 23:13:41,788 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:41,788 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:41,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 23:13:41,788 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:41,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:41,788 INFO L85 PathProgramCache]: Analyzing trace with hash -1374529741, now seen corresponding path program 23 times [2022-01-31 23:13:41,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:41,789 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1400001143] [2022-01-31 23:13:41,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:41,789 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:41,790 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:41,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:41,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:41,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 23:13:41,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:41,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:41,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:41,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:41,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:13:41,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:13:41,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:13:41,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:41,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:41,916 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:41,916 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1400001143] [2022-01-31 23:13:41,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1400001143] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:41,916 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:41,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 23:13:41,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416022638] [2022-01-31 23:13:41,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:41,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 23:13:41,918 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:41,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 23:13:41,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 23:13:41,918 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:42,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:42,256 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2022-01-31 23:13:42,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 23:13:42,257 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 96 [2022-01-31 23:13:42,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:42,257 INFO L225 Difference]: With dead ends: 174 [2022-01-31 23:13:42,257 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 23:13:42,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:13:42,258 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:42,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:13:42,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 23:13:42,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-31 23:13:42,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 100 states have internal predecessors, (103), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 23:13:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-01-31 23:13:42,306 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 96 [2022-01-31 23:13:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:42,306 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-01-31 23:13:42,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-01-31 23:13:42,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 23:13:42,307 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:42,307 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:42,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 23:13:42,307 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:42,307 INFO L85 PathProgramCache]: Analyzing trace with hash 629203673, now seen corresponding path program 24 times [2022-01-31 23:13:42,307 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:42,307 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [602003135] [2022-01-31 23:13:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:42,308 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:42,309 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:42,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:42,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:42,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:42,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:42,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:13:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:13:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:13:42,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:42,738 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:42,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [602003135] [2022-01-31 23:13:42,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [602003135] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:42,738 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:42,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:13:42,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028549479] [2022-01-31 23:13:42,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:42,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:13:42,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:13:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:13:42,739 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:44,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:44,156 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2022-01-31 23:13:44,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:13:44,156 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 96 [2022-01-31 23:13:44,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:44,157 INFO L225 Difference]: With dead ends: 151 [2022-01-31 23:13:44,157 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 23:13:44,158 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=227, Invalid=2529, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 23:13:44,158 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:44,158 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 144 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:13:44,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 23:13:44,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 97. [2022-01-31 23:13:44,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 23:13:44,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-01-31 23:13:44,191 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 96 [2022-01-31 23:13:44,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:44,191 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-01-31 23:13:44,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 23:13:44,192 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-01-31 23:13:44,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 23:13:44,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:44,193 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:44,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 23:13:44,193 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:44,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:44,193 INFO L85 PathProgramCache]: Analyzing trace with hash 933699857, now seen corresponding path program 25 times [2022-01-31 23:13:44,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:44,193 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [937877009] [2022-01-31 23:13:44,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:44,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:44,194 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:44,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:44,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:44,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:44,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:44,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:13:44,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:13:44,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:13:44,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:44,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:44,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:44,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [937877009] [2022-01-31 23:13:44,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [937877009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:44,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:44,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:13:44,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20563690] [2022-01-31 23:13:44,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:44,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:13:44,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:44,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:13:44,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:13:44,889 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:46,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:46,350 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2022-01-31 23:13:46,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 23:13:46,351 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-01-31 23:13:46,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:46,351 INFO L225 Difference]: With dead ends: 147 [2022-01-31 23:13:46,351 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 23:13:46,352 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 23:13:46,352 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:46,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 116 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 23:13:46,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 23:13:46,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2022-01-31 23:13:46,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.029126213592233) internal successors, (106), 105 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 23:13:46,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2022-01-31 23:13:46,406 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 98 [2022-01-31 23:13:46,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:46,406 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2022-01-31 23:13:46,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:46,407 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2022-01-31 23:13:46,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 23:13:46,407 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:46,407 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:46,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 23:13:46,407 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:46,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:46,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1355748497, now seen corresponding path program 26 times [2022-01-31 23:13:46,408 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:46,408 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939251597] [2022-01-31 23:13:46,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:46,408 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:46,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:46,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:47,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:47,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:47,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:47,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:13:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:13:47,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:13:47,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:13:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:13:47,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:13:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:47,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:47,104 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:47,104 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939251597] [2022-01-31 23:13:47,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1939251597] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:47,104 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:47,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 23:13:47,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750104995] [2022-01-31 23:13:47,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:47,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 23:13:47,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:47,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 23:13:47,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:13:47,105 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:48,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:48,914 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2022-01-31 23:13:48,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:13:48,915 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 100 [2022-01-31 23:13:48,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:48,915 INFO L225 Difference]: With dead ends: 188 [2022-01-31 23:13:48,916 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 23:13:48,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=247, Invalid=2615, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:13:48,916 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 75 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:48,917 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 143 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2132 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:13:48,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 23:13:48,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2022-01-31 23:13:48,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 107 states have internal predecessors, (109), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 23:13:48,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-01-31 23:13:48,975 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 100 [2022-01-31 23:13:48,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:48,975 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-01-31 23:13:48,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:48,975 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-01-31 23:13:48,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 23:13:48,976 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:48,976 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:48,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 23:13:48,976 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:48,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:48,976 INFO L85 PathProgramCache]: Analyzing trace with hash 1802606157, now seen corresponding path program 27 times [2022-01-31 23:13:48,976 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:48,976 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493987200] [2022-01-31 23:13:48,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:48,977 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:48,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:49,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:49,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:49,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:49,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:13:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:13:49,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:13:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:13:49,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:13:49,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:13:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:13:49,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:13:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:49,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:49,641 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:49,641 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493987200] [2022-01-31 23:13:49,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [493987200] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:49,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:49,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:13:49,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309640155] [2022-01-31 23:13:49,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:49,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:13:49,642 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:49,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:13:49,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:13:49,643 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:51,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:51,721 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2022-01-31 23:13:51,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:13:51,722 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 102 [2022-01-31 23:13:51,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:51,722 INFO L225 Difference]: With dead ends: 191 [2022-01-31 23:13:51,722 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 23:13:51,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=3032, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:13:51,724 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 83 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:51,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 150 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:13:51,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 23:13:51,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 142. [2022-01-31 23:13:51,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 23:13:51,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2022-01-31 23:13:51,785 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 102 [2022-01-31 23:13:51,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:51,786 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2022-01-31 23:13:51,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:51,786 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2022-01-31 23:13:51,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 23:13:51,786 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:51,786 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:51,786 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 23:13:51,787 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:51,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:51,787 INFO L85 PathProgramCache]: Analyzing trace with hash 439550379, now seen corresponding path program 28 times [2022-01-31 23:13:51,787 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:51,787 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141725423] [2022-01-31 23:13:51,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:51,787 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:51,788 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:51,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:52,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:52,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:52,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:13:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:13:52,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:13:52,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:13:52,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:13:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:13:52,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:13:52,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:13:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:52,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:52,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:52,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141725423] [2022-01-31 23:13:52,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141725423] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:52,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:52,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:13:52,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145335966] [2022-01-31 23:13:52,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:52,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:13:52,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:52,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:13:52,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:13:52,445 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:54,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:54,581 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2022-01-31 23:13:54,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:13:54,581 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 104 [2022-01-31 23:13:54,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:54,582 INFO L225 Difference]: With dead ends: 194 [2022-01-31 23:13:54,582 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 23:13:54,583 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:13:54,583 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:54,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 157 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:13:54,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 23:13:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 144. [2022-01-31 23:13:54,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.055045871559633) internal successors, (115), 111 states have internal predecessors, (115), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 23:13:54,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2022-01-31 23:13:54,652 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 104 [2022-01-31 23:13:54,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:54,652 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2022-01-31 23:13:54,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:54,652 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2022-01-31 23:13:54,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 23:13:54,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:54,653 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:54,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 23:13:54,653 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:54,654 INFO L85 PathProgramCache]: Analyzing trace with hash -1473017885, now seen corresponding path program 29 times [2022-01-31 23:13:54,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:54,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605693246] [2022-01-31 23:13:54,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:54,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:54,655 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:54,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:55,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:55,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:55,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:13:55,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:55,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:55,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:55,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:13:55,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:13:55,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:13:55,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:13:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:55,265 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:55,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:55,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605693246] [2022-01-31 23:13:55,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [605693246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:55,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:55,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 23:13:55,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165059084] [2022-01-31 23:13:55,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:55,266 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 23:13:55,266 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:55,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 23:13:55,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2022-01-31 23:13:55,266 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:13:56,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:56,664 INFO L93 Difference]: Finished difference Result 195 states and 219 transitions. [2022-01-31 23:13:56,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:13:56,664 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 106 [2022-01-31 23:13:56,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:56,665 INFO L225 Difference]: With dead ends: 195 [2022-01-31 23:13:56,665 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 23:13:56,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=2622, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 23:13:56,666 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:56,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 125 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:13:56,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 23:13:56,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-01-31 23:13:56,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 23:13:56,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 23:13:56,756 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 106 [2022-01-31 23:13:56,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:56,756 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 23:13:56,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:13:56,756 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 23:13:56,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 23:13:56,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:56,757 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:56,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 23:13:56,757 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:56,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:56,757 INFO L85 PathProgramCache]: Analyzing trace with hash 507973001, now seen corresponding path program 30 times [2022-01-31 23:13:56,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:56,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [136017955] [2022-01-31 23:13:56,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:56,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:56,758 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:56,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:57,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:57,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:57,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:13:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:13:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:13:57,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:13:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:13:57,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:13:57,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:13:57,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:13:57,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:57,224 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:57,224 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [136017955] [2022-01-31 23:13:57,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [136017955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:57,224 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:57,224 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:13:57,224 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163799529] [2022-01-31 23:13:57,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:57,224 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:13:57,224 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:57,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:13:57,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:13:57,225 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:13:59,031 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-01-31 23:13:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:13:59,032 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 106 [2022-01-31 23:13:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:13:59,033 INFO L225 Difference]: With dead ends: 208 [2022-01-31 23:13:59,033 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 23:13:59,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=3057, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:13:59,033 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 99 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:13:59,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 166 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:13:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 23:13:59,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-01-31 23:13:59,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 23:13:59,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 23:13:59,126 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 106 [2022-01-31 23:13:59,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:13:59,126 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 23:13:59,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 23:13:59,126 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 23:13:59,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 23:13:59,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:13:59,127 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:13:59,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 23:13:59,127 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:13:59,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:13:59,127 INFO L85 PathProgramCache]: Analyzing trace with hash -143387583, now seen corresponding path program 31 times [2022-01-31 23:13:59,127 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:13:59,127 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486419238] [2022-01-31 23:13:59,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:13:59,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:13:59,129 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:13:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:13:59,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:13:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:13:59,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:13:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:13:59,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:13:59,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:13:59,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:13:59,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:13:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:13:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:13:59,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:13:59,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:13:59,888 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:13:59,888 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:13:59,888 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486419238] [2022-01-31 23:13:59,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486419238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:13:59,888 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:13:59,888 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 23:13:59,888 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105747354] [2022-01-31 23:13:59,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:13:59,888 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 23:13:59,888 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:13:59,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 23:13:59,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 23:13:59,889 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:01,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:01,922 INFO L93 Difference]: Finished difference Result 238 states and 271 transitions. [2022-01-31 23:14:01,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:14:01,923 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 108 [2022-01-31 23:14:01,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:01,924 INFO L225 Difference]: With dead ends: 238 [2022-01-31 23:14:01,924 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 23:14:01,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=262, Invalid=3044, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 23:14:01,925 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 72 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:01,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 142 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:14:01,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 23:14:02,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2022-01-31 23:14:02,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 23:14:02,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 23:14:02,021 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 108 [2022-01-31 23:14:02,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:02,021 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 23:14:02,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:02,021 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 23:14:02,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 23:14:02,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:02,022 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:02,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 23:14:02,022 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:02,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:02,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2026045727, now seen corresponding path program 32 times [2022-01-31 23:14:02,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:02,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976080390] [2022-01-31 23:14:02,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:02,023 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:02,024 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:02,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:02,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:02,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:02,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:14:02,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:02,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:02,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:02,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:02,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:02,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:02,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:02,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:02,800 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:02,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:02,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976080390] [2022-01-31 23:14:02,801 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [976080390] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:02,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:02,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:14:02,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646204046] [2022-01-31 23:14:02,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:02,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:14:02,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:02,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:14:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:14:02,802 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:04,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:04,961 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2022-01-31 23:14:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:14:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 110 [2022-01-31 23:14:04,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:04,963 INFO L225 Difference]: With dead ends: 239 [2022-01-31 23:14:04,963 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 23:14:04,963 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=272, Invalid=3150, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 23:14:04,963 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 86 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:04,964 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 149 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:14:04,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 23:14:05,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 187. [2022-01-31 23:14:05,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 23:14:05,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 23:14:05,058 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 110 [2022-01-31 23:14:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:05,058 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 23:14:05,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 23:14:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 23:14:05,059 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:05,059 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:05,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 23:14:05,059 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:05,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:05,059 INFO L85 PathProgramCache]: Analyzing trace with hash -502649219, now seen corresponding path program 33 times [2022-01-31 23:14:05,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:05,060 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1757788073] [2022-01-31 23:14:05,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:05,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:05,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:05,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:05,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:05,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:05,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:14:05,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:14:05,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:14:05,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:14:05,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:14:05,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:14:05,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:14:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:14:05,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:14:05,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:05,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:05,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1757788073] [2022-01-31 23:14:05,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1757788073] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:05,719 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:05,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:14:05,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290626329] [2022-01-31 23:14:05,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:05,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:14:05,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:05,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:14:05,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:14:05,721 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:08,050 INFO L93 Difference]: Finished difference Result 234 states and 265 transitions. [2022-01-31 23:14:08,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 23:14:08,050 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 112 [2022-01-31 23:14:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:08,051 INFO L225 Difference]: With dead ends: 234 [2022-01-31 23:14:08,051 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 23:14:08,052 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=308, Invalid=3852, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:14:08,052 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2985 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:08,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 163 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2985 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:14:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 23:14:08,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 152. [2022-01-31 23:14:08,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.0521739130434782) internal successors, (121), 117 states have internal predecessors, (121), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 23:14:08,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-01-31 23:14:08,125 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 112 [2022-01-31 23:14:08,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:08,125 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-01-31 23:14:08,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:08,125 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-01-31 23:14:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 23:14:08,126 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:08,126 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:08,126 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 23:14:08,126 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:08,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:08,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1323500363, now seen corresponding path program 34 times [2022-01-31 23:14:08,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:08,126 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232551030] [2022-01-31 23:14:08,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:08,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:08,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:08,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:08,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 23:14:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:14:08,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:14:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:14:08,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:14:08,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:14:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:14:08,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:14:08,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:14:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:14:08,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:08,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:08,287 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:08,287 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232551030] [2022-01-31 23:14:08,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [232551030] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:08,288 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:08,288 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 23:14:08,288 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331138897] [2022-01-31 23:14:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:08,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 23:14:08,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 23:14:08,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-01-31 23:14:08,289 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:08,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:08,756 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2022-01-31 23:14:08,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 23:14:08,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 114 [2022-01-31 23:14:08,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:08,757 INFO L225 Difference]: With dead ends: 204 [2022-01-31 23:14:08,757 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 23:14:08,757 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:14:08,758 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:08,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 90 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:14:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 23:14:08,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 23:14:08,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 23:14:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-01-31 23:14:08,836 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 114 [2022-01-31 23:14:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:08,836 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-01-31 23:14:08,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-01-31 23:14:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 23:14:08,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:08,837 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:08,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 23:14:08,837 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:08,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:08,837 INFO L85 PathProgramCache]: Analyzing trace with hash 372997211, now seen corresponding path program 35 times [2022-01-31 23:14:08,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:08,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550424404] [2022-01-31 23:14:08,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:08,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:08,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:09,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:09,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:09,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:14:09,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:14:09,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:14:09,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:14:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:14:09,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:14:09,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:14:09,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:14:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:14:09,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:09,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:09,428 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:09,428 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550424404] [2022-01-31 23:14:09,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550424404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:09,428 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:09,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:14:09,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130195778] [2022-01-31 23:14:09,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:09,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:14:09,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:09,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:14:09,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:14:09,429 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:11,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:11,563 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2022-01-31 23:14:11,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:14:11,564 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 114 [2022-01-31 23:14:11,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:11,565 INFO L225 Difference]: With dead ends: 210 [2022-01-31 23:14:11,565 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 23:14:11,565 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=341, Invalid=4215, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:14:11,565 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 101 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:11,566 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 166 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:14:11,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 23:14:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 197. [2022-01-31 23:14:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 152 states have internal predecessors, (155), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 23:14:11,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2022-01-31 23:14:11,672 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 114 [2022-01-31 23:14:11,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:11,672 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2022-01-31 23:14:11,672 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:11,672 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2022-01-31 23:14:11,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 23:14:11,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:11,673 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:11,673 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 23:14:11,673 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:11,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:11,673 INFO L85 PathProgramCache]: Analyzing trace with hash -1640871149, now seen corresponding path program 36 times [2022-01-31 23:14:11,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:11,673 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1369153131] [2022-01-31 23:14:11,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:11,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:11,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:11,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:14:12,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:12,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:12,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:12,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:12,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1369153131] [2022-01-31 23:14:12,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1369153131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:12,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:12,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:14:12,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134822916] [2022-01-31 23:14:12,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:12,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:14:12,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:12,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:14:12,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:14:12,506 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:14,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:14,268 INFO L93 Difference]: Finished difference Result 252 states and 286 transitions. [2022-01-31 23:14:14,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 23:14:14,268 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 116 [2022-01-31 23:14:14,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:14,269 INFO L225 Difference]: With dead ends: 252 [2022-01-31 23:14:14,269 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 23:14:14,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 23:14:14,270 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:14,270 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 136 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 23:14:14,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 23:14:14,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 232. [2022-01-31 23:14:14,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 175 states have (on average 1.0342857142857143) internal successors, (181), 179 states have internal predecessors, (181), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 23:14:14,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-01-31 23:14:14,400 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 116 [2022-01-31 23:14:14,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:14,401 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-01-31 23:14:14,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:14,401 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-01-31 23:14:14,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 23:14:14,401 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:14,401 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:14,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 23:14:14,402 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:14,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:14,402 INFO L85 PathProgramCache]: Analyzing trace with hash 55626425, now seen corresponding path program 37 times [2022-01-31 23:14:14,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:14,402 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214056043] [2022-01-31 23:14:14,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:14,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:14,403 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:14,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:14,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:14,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:14,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:14,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:14,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:14,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:14,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:14,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:14,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:14,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:14,953 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:14,953 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:14,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214056043] [2022-01-31 23:14:14,953 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1214056043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:14,953 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:14,953 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:14:14,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153511285] [2022-01-31 23:14:14,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:14,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:14:14,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:14,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:14:14,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:14:14,954 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:16,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:16,853 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2022-01-31 23:14:16,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:14:16,854 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 116 [2022-01-31 23:14:16,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:16,855 INFO L225 Difference]: With dead ends: 264 [2022-01-31 23:14:16,855 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 23:14:16,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=3659, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 23:14:16,856 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 109 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:16,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 171 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:14:16,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 23:14:16,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 199. [2022-01-31 23:14:16,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 153 states have internal predecessors, (155), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 23:14:16,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2022-01-31 23:14:16,970 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 116 [2022-01-31 23:14:16,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:16,970 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2022-01-31 23:14:16,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 23:14:16,970 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2022-01-31 23:14:16,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 23:14:16,971 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:16,971 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:16,971 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 23:14:16,971 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:16,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:16,971 INFO L85 PathProgramCache]: Analyzing trace with hash -1691518479, now seen corresponding path program 38 times [2022-01-31 23:14:16,971 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:16,971 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071141606] [2022-01-31 23:14:16,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:16,972 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:16,973 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:16,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:17,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:17,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:17,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:14:17,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:17,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:17,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:17,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:17,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:17,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:17,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:17,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:14:17,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:17,734 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:17,734 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071141606] [2022-01-31 23:14:17,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071141606] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:17,734 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:17,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:14:17,734 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196769346] [2022-01-31 23:14:17,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:17,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:14:17,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:17,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:14:17,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:14:17,735 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:19,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:19,759 INFO L93 Difference]: Finished difference Result 254 states and 288 transitions. [2022-01-31 23:14:19,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 23:14:19,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 118 [2022-01-31 23:14:19,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:19,761 INFO L225 Difference]: With dead ends: 254 [2022-01-31 23:14:19,761 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 23:14:19,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=311, Invalid=3849, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:14:19,762 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:19,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:14:19,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 23:14:19,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2022-01-31 23:14:19,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 153 states have internal predecessors, (155), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 23:14:19,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2022-01-31 23:14:19,871 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 118 [2022-01-31 23:14:19,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:19,871 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2022-01-31 23:14:19,871 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:19,871 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2022-01-31 23:14:19,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 23:14:19,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:19,872 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:19,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 23:14:19,872 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:19,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:19,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1176004943, now seen corresponding path program 39 times [2022-01-31 23:14:19,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:19,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006613378] [2022-01-31 23:14:19,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:19,873 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:19,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:19,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:20,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:14:20,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:14:20,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:14:20,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:14:20,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:14:20,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:14:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:14:20,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:14:20,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:14:20,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:14:20,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:20,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:20,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:20,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006613378] [2022-01-31 23:14:20,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006613378] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:20,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:20,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 23:14:20,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177983700] [2022-01-31 23:14:20,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:20,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 23:14:20,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:20,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 23:14:20,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:14:20,554 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:22,702 INFO L93 Difference]: Finished difference Result 217 states and 241 transitions. [2022-01-31 23:14:22,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 23:14:22,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 120 [2022-01-31 23:14:22,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:22,703 INFO L225 Difference]: With dead ends: 217 [2022-01-31 23:14:22,703 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 23:14:22,703 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:14:22,704 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2966 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:22,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 162 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2966 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:14:22,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 23:14:22,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2022-01-31 23:14:22,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 23:14:22,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2022-01-31 23:14:22,789 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 120 [2022-01-31 23:14:22,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:22,789 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2022-01-31 23:14:22,789 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:22,789 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2022-01-31 23:14:22,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 23:14:22,790 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:22,790 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:22,790 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 23:14:22,790 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:22,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:22,790 INFO L85 PathProgramCache]: Analyzing trace with hash -502990547, now seen corresponding path program 40 times [2022-01-31 23:14:22,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:22,790 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878770396] [2022-01-31 23:14:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:22,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:22,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:22,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:23,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:14:23,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:14:23,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:14:23,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:14:23,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:14:23,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:14:23,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:14:23,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:14:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:14:23,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:14:23,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:23,500 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:23,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:23,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878770396] [2022-01-31 23:14:23,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [878770396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:23,500 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:23,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:14:23,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228545125] [2022-01-31 23:14:23,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:23,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:14:23,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:14:23,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:14:23,501 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:25,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:25,999 INFO L93 Difference]: Finished difference Result 220 states and 245 transitions. [2022-01-31 23:14:25,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:14:26,000 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 122 [2022-01-31 23:14:26,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:26,000 INFO L225 Difference]: With dead ends: 220 [2022-01-31 23:14:26,000 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 23:14:26,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=356, Invalid=4756, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:14:26,001 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 100 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:26,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 180 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:14:26,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 23:14:26,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-01-31 23:14:26,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 158 states have (on average 1.0379746835443038) internal successors, (164), 161 states have internal predecessors, (164), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 23:14:26,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2022-01-31 23:14:26,115 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 122 [2022-01-31 23:14:26,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:26,115 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2022-01-31 23:14:26,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:26,115 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2022-01-31 23:14:26,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 23:14:26,116 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:26,116 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:26,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 23:14:26,116 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:26,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -1233285147, now seen corresponding path program 41 times [2022-01-31 23:14:26,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:26,116 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415861951] [2022-01-31 23:14:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:26,117 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:26,118 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:26,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:26,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:26,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:14:26,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:26,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:26,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:26,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:26,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:26,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:26,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:14:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:26,907 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:26,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415861951] [2022-01-31 23:14:26,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [415861951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:26,908 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:26,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 23:14:26,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900712374] [2022-01-31 23:14:26,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:26,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 23:14:26,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:26,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 23:14:26,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 23:14:26,909 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:28,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:28,759 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2022-01-31 23:14:28,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:14:28,760 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 124 [2022-01-31 23:14:28,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:28,761 INFO L225 Difference]: With dead ends: 268 [2022-01-31 23:14:28,761 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 23:14:28,761 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 23:14:28,761 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:28,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 141 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 23:14:28,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 23:14:28,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 244. [2022-01-31 23:14:28,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 184 states have (on average 1.0326086956521738) internal successors, (190), 188 states have internal predecessors, (190), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 23:14:28,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 277 transitions. [2022-01-31 23:14:28,904 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 277 transitions. Word has length 124 [2022-01-31 23:14:28,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:28,905 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 277 transitions. [2022-01-31 23:14:28,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:28,905 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 277 transitions. [2022-01-31 23:14:28,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 23:14:28,905 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:28,906 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:28,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 23:14:28,906 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:28,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:28,906 INFO L85 PathProgramCache]: Analyzing trace with hash 890046859, now seen corresponding path program 42 times [2022-01-31 23:14:28,906 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:28,906 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316075734] [2022-01-31 23:14:28,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:28,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:28,907 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:28,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:29,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:29,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:29,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:29,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:29,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:29,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:29,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:29,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:29,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:14:29,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:29,548 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:29,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:29,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316075734] [2022-01-31 23:14:29,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [316075734] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:29,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:29,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:14:29,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811984289] [2022-01-31 23:14:29,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:29,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:14:29,549 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:29,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:14:29,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:14:29,549 INFO L87 Difference]: Start difference. First operand 244 states and 277 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:32,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:32,079 INFO L93 Difference]: Finished difference Result 319 states and 367 transitions. [2022-01-31 23:14:32,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:14:32,079 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 124 [2022-01-31 23:14:32,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:32,081 INFO L225 Difference]: With dead ends: 319 [2022-01-31 23:14:32,081 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 23:14:32,081 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=366, Invalid=4890, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:14:32,081 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 110 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 3812 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:32,081 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 180 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3812 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:14:32,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 23:14:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 246. [2022-01-31 23:14:32,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 190 states have internal predecessors, (193), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 23:14:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 280 transitions. [2022-01-31 23:14:32,231 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 280 transitions. Word has length 124 [2022-01-31 23:14:32,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:32,231 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 280 transitions. [2022-01-31 23:14:32,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:32,231 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 280 transitions. [2022-01-31 23:14:32,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 23:14:32,232 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:32,232 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:32,232 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 23:14:32,232 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:32,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:32,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1740832963, now seen corresponding path program 43 times [2022-01-31 23:14:32,232 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:32,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1522476930] [2022-01-31 23:14:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:32,233 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:32,234 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:32,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:32,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:32,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:32,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:14:32,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:32,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:32,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:32,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:32,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:32,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:32,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:14:32,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:14:32,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:32,990 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:32,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:32,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1522476930] [2022-01-31 23:14:32,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1522476930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:32,990 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:32,990 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 23:14:32,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601490626] [2022-01-31 23:14:32,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:32,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 23:14:32,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:32,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 23:14:32,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2022-01-31 23:14:32,991 INFO L87 Difference]: Start difference. First operand 246 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:35,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:35,191 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-01-31 23:14:35,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 23:14:35,192 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 126 [2022-01-31 23:14:35,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:35,193 INFO L225 Difference]: With dead ends: 305 [2022-01-31 23:14:35,193 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 23:14:35,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=4105, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 23:14:35,194 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 76 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:35,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 154 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:14:35,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 23:14:35,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2022-01-31 23:14:35,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 190 states have internal predecessors, (193), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 23:14:35,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 280 transitions. [2022-01-31 23:14:35,342 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 280 transitions. Word has length 126 [2022-01-31 23:14:35,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:35,342 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 280 transitions. [2022-01-31 23:14:35,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:35,343 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 280 transitions. [2022-01-31 23:14:35,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 23:14:35,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:35,343 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:35,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 23:14:35,344 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:35,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:35,344 INFO L85 PathProgramCache]: Analyzing trace with hash -430802327, now seen corresponding path program 44 times [2022-01-31 23:14:35,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:35,344 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071702281] [2022-01-31 23:14:35,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:35,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:35,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:35,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:35,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:35,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:35,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:35,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:35,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:35,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:35,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:14:35,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:14:35,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:35,894 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:35,894 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:35,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071702281] [2022-01-31 23:14:35,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071702281] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:35,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:35,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:14:35,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793421891] [2022-01-31 23:14:35,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:35,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:14:35,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:35,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:14:35,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:14:35,895 INFO L87 Difference]: Start difference. First operand 246 states and 280 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:38,125 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2022-01-31 23:14:38,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 23:14:38,125 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 126 [2022-01-31 23:14:38,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:38,126 INFO L225 Difference]: With dead ends: 287 [2022-01-31 23:14:38,126 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 23:14:38,127 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=4289, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:14:38,127 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 119 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 4205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:38,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 185 Invalid, 4205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:14:38,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 23:14:38,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 211. [2022-01-31 23:14:38,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 162 states have internal predecessors, (164), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 23:14:38,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2022-01-31 23:14:38,255 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 126 [2022-01-31 23:14:38,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:38,255 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2022-01-31 23:14:38,255 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 23:14:38,255 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2022-01-31 23:14:38,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 23:14:38,256 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:38,256 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:38,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 23:14:38,256 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:38,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:38,256 INFO L85 PathProgramCache]: Analyzing trace with hash -579882463, now seen corresponding path program 45 times [2022-01-31 23:14:38,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:38,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [653678059] [2022-01-31 23:14:38,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:38,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:38,258 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:38,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:38,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:14:38,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:14:38,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:14:38,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:14:38,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:14:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:14:38,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:14:38,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:14:38,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:14:38,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:14:38,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:14:38,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:38,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:38,960 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:38,960 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [653678059] [2022-01-31 23:14:38,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [653678059] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:38,960 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:38,960 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:14:38,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639633000] [2022-01-31 23:14:38,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:38,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:14:38,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:38,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:14:38,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:14:38,961 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:41,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:41,307 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2022-01-31 23:14:41,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 23:14:41,307 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 128 [2022-01-31 23:14:41,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:41,308 INFO L225 Difference]: With dead ends: 229 [2022-01-31 23:14:41,308 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 23:14:41,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=343, Invalid=4627, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 23:14:41,309 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:41,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 169 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 23:14:41,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 23:14:41,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 168. [2022-01-31 23:14:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 23:14:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-01-31 23:14:41,410 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 128 [2022-01-31 23:14:41,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:41,410 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-01-31 23:14:41,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-01-31 23:14:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 23:14:41,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:41,411 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:41,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 23:14:41,411 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:41,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:41,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1699380225, now seen corresponding path program 46 times [2022-01-31 23:14:41,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:41,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [352952763] [2022-01-31 23:14:41,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:41,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:41,413 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:41,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:42,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:14:42,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:14:42,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:14:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:14:42,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:14:42,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:14:42,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:14:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:14:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:14:42,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:14:42,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:14:42,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:42,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:42,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:42,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [352952763] [2022-01-31 23:14:42,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [352952763] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:42,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:42,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:14:42,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961614201] [2022-01-31 23:14:42,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:42,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:14:42,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:42,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:14:42,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:14:42,156 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:44,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:44,793 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2022-01-31 23:14:44,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:14:44,793 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 130 [2022-01-31 23:14:44,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:44,794 INFO L225 Difference]: With dead ends: 232 [2022-01-31 23:14:44,794 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 23:14:44,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=362, Invalid=5040, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:14:44,795 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:44,795 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 179 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:14:44,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 23:14:44,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-01-31 23:14:44,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.035928143712575) internal successors, (173), 170 states have internal predecessors, (173), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 23:14:44,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 246 transitions. [2022-01-31 23:14:44,950 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 246 transitions. Word has length 130 [2022-01-31 23:14:44,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:44,950 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 246 transitions. [2022-01-31 23:14:44,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:44,950 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 246 transitions. [2022-01-31 23:14:44,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 23:14:44,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:44,951 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:44,951 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 23:14:44,951 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:44,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:44,951 INFO L85 PathProgramCache]: Analyzing trace with hash 560456375, now seen corresponding path program 47 times [2022-01-31 23:14:44,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:44,951 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45993132] [2022-01-31 23:14:44,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:44,951 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:44,953 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:45,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:45,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:45,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 23:14:45,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:45,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:45,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:45,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:45,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:45,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:45,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:45,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:45,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:14:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:14:45,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:45,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:45,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:45,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45993132] [2022-01-31 23:14:45,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [45993132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:45,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:45,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 23:14:45,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275075561] [2022-01-31 23:14:45,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:45,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 23:14:45,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:45,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 23:14:45,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-01-31 23:14:45,150 INFO L87 Difference]: Start difference. First operand 221 states and 246 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:45,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:45,736 INFO L93 Difference]: Finished difference Result 281 states and 318 transitions. [2022-01-31 23:14:45,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 23:14:45,736 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 132 [2022-01-31 23:14:45,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:45,737 INFO L225 Difference]: With dead ends: 281 [2022-01-31 23:14:45,737 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 23:14:45,737 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:14:45,738 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 153 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:45,738 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 74 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 23:14:45,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 23:14:45,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-01-31 23:14:45,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.029940119760479) internal successors, (172), 170 states have internal predecessors, (172), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 23:14:45,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2022-01-31 23:14:45,875 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 132 [2022-01-31 23:14:45,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:45,875 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2022-01-31 23:14:45,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:45,875 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2022-01-31 23:14:45,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 23:14:45,876 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:45,876 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:45,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 23:14:45,876 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:45,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:45,876 INFO L85 PathProgramCache]: Analyzing trace with hash 500061789, now seen corresponding path program 48 times [2022-01-31 23:14:45,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:45,877 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [742299359] [2022-01-31 23:14:45,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:45,877 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:45,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:46,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:14:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:14:46,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:14:46,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:14:46,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:14:46,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:14:46,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:14:46,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:14:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:14:46,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:14:46,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:14:46,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:46,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:46,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:46,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [742299359] [2022-01-31 23:14:46,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [742299359] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:46,607 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:46,607 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:14:46,607 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572679880] [2022-01-31 23:14:46,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:46,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:14:46,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:46,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:14:46,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:14:46,608 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:49,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:49,432 INFO L93 Difference]: Finished difference Result 286 states and 323 transitions. [2022-01-31 23:14:49,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:14:49,432 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 132 [2022-01-31 23:14:49,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:49,433 INFO L225 Difference]: With dead ends: 286 [2022-01-31 23:14:49,433 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 23:14:49,434 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=5471, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:14:49,434 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:49,434 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 189 Invalid, 4288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:14:49,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 23:14:49,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 223. [2022-01-31 23:14:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 169 states have (on average 1.0355029585798816) internal successors, (175), 172 states have internal predecessors, (175), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 23:14:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 248 transitions. [2022-01-31 23:14:49,575 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 248 transitions. Word has length 132 [2022-01-31 23:14:49,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:49,576 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 248 transitions. [2022-01-31 23:14:49,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:49,576 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 248 transitions. [2022-01-31 23:14:49,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 23:14:49,576 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:49,577 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:49,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 23:14:49,577 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:49,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:49,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1100322197, now seen corresponding path program 49 times [2022-01-31 23:14:49,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:49,577 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1551730564] [2022-01-31 23:14:49,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:49,577 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:49,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:49,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:50,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:50,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:14:50,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:50,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:50,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:50,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:50,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:50,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:50,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:14:50,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:14:50,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:14:50,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:50,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:50,581 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:50,581 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1551730564] [2022-01-31 23:14:50,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1551730564] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:50,581 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:50,581 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:14:50,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507550030] [2022-01-31 23:14:50,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:50,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:14:50,582 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:50,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:14:50,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:14:50,582 INFO L87 Difference]: Start difference. First operand 223 states and 248 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:52,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:52,248 INFO L93 Difference]: Finished difference Result 290 states and 329 transitions. [2022-01-31 23:14:52,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:14:52,248 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 134 [2022-01-31 23:14:52,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:52,249 INFO L225 Difference]: With dead ends: 290 [2022-01-31 23:14:52,249 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 23:14:52,250 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=469, Invalid=3691, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 23:14:52,250 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 184 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:52,250 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 112 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 23:14:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 23:14:52,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 258. [2022-01-31 23:14:52,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 195 states have (on average 1.0307692307692307) internal successors, (201), 199 states have internal predecessors, (201), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 23:14:52,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 292 transitions. [2022-01-31 23:14:52,426 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 292 transitions. Word has length 134 [2022-01-31 23:14:52,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:52,426 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 292 transitions. [2022-01-31 23:14:52,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:52,426 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 292 transitions. [2022-01-31 23:14:52,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 23:14:52,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:52,427 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:52,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 23:14:52,427 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:52,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:52,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1039927611, now seen corresponding path program 50 times [2022-01-31 23:14:52,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:52,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867548433] [2022-01-31 23:14:52,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:52,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:52,429 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:52,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:53,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:53,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:53,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:14:53,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:14:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:14:53,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:14:53,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:14:53,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:14:53,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:14:53,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:14:53,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:14:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:14:53,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:14:53,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:53,121 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:53,121 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:53,121 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867548433] [2022-01-31 23:14:53,121 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867548433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:53,121 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:53,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:14:53,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579396851] [2022-01-31 23:14:53,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:53,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:14:53,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:53,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:14:53,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:14:53,122 INFO L87 Difference]: Start difference. First operand 258 states and 292 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:56,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:56,037 INFO L93 Difference]: Finished difference Result 345 states and 397 transitions. [2022-01-31 23:14:56,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 23:14:56,038 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 134 [2022-01-31 23:14:56,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:56,039 INFO L225 Difference]: With dead ends: 345 [2022-01-31 23:14:56,039 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 23:14:56,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=391, Invalid=5615, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:14:56,040 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:56,040 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 193 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4440 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:14:56,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 23:14:56,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2022-01-31 23:14:56,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 197 states have (on average 1.0355329949238579) internal successors, (204), 201 states have internal predecessors, (204), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 23:14:56,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 295 transitions. [2022-01-31 23:14:56,220 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 295 transitions. Word has length 134 [2022-01-31 23:14:56,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:56,220 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 295 transitions. [2022-01-31 23:14:56,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:14:56,220 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 295 transitions. [2022-01-31 23:14:56,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 23:14:56,221 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:56,221 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:56,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 23:14:56,221 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:56,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:56,221 INFO L85 PathProgramCache]: Analyzing trace with hash 220334323, now seen corresponding path program 51 times [2022-01-31 23:14:56,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:56,221 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059170753] [2022-01-31 23:14:56,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:56,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:56,223 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:56,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:57,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:14:57,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:14:57,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:14:57,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:14:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:14:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:14:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:14:57,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:14:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:14:57,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:14:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:14:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:14:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:57,098 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:57,098 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:57,098 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059170753] [2022-01-31 23:14:57,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059170753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:57,098 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:57,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:14:57,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033563415] [2022-01-31 23:14:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:57,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:14:57,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:57,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:14:57,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:14:57,099 INFO L87 Difference]: Start difference. First operand 260 states and 295 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:59,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:14:59,120 INFO L93 Difference]: Finished difference Result 292 states and 332 transitions. [2022-01-31 23:14:59,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 23:14:59,121 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 136 [2022-01-31 23:14:59,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:14:59,122 INFO L225 Difference]: With dead ends: 292 [2022-01-31 23:14:59,122 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 23:14:59,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=545, Invalid=4147, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 23:14:59,123 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 195 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:14:59,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 143 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:14:59,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 23:14:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2022-01-31 23:14:59,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 171 states have (on average 1.04093567251462) internal successors, (178), 174 states have internal predecessors, (178), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 23:14:59,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2022-01-31 23:14:59,272 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 136 [2022-01-31 23:14:59,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:14:59,272 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2022-01-31 23:14:59,273 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:14:59,273 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2022-01-31 23:14:59,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 23:14:59,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:14:59,273 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:14:59,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 23:14:59,273 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:14:59,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:14:59,274 INFO L85 PathProgramCache]: Analyzing trace with hash 159939737, now seen corresponding path program 52 times [2022-01-31 23:14:59,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:14:59,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [366976426] [2022-01-31 23:14:59,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:14:59,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:14:59,276 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:14:59,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:14:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:14:59,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:14:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:14:59,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:14:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:14:59,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:14:59,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:14:59,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:14:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:14:59,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:14:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:14:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:14:59,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:14:59,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:14:59,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:14:59,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:14:59,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [366976426] [2022-01-31 23:14:59,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [366976426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:14:59,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:14:59,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:14:59,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090882568] [2022-01-31 23:14:59,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:14:59,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:14:59,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:14:59,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:14:59,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:14:59,921 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:15:02,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:02,544 INFO L93 Difference]: Finished difference Result 263 states and 294 transitions. [2022-01-31 23:15:02,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 23:15:02,544 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 136 [2022-01-31 23:15:02,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:02,545 INFO L225 Difference]: With dead ends: 263 [2022-01-31 23:15:02,545 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 23:15:02,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=4969, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:15:02,546 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 126 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4896 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 5036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:02,546 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 202 Invalid, 5036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4896 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:15:02,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 23:15:02,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 176. [2022-01-31 23:15:02,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 135 states have internal predecessors, (137), 26 states have call successors, (26), 17 states have call predecessors, (26), 16 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 23:15:02,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2022-01-31 23:15:02,659 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 136 [2022-01-31 23:15:02,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:02,659 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2022-01-31 23:15:02,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 23:15:02,660 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2022-01-31 23:15:02,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 23:15:02,660 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:02,660 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:02,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 23:15:02,660 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:02,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:02,661 INFO L85 PathProgramCache]: Analyzing trace with hash 660544721, now seen corresponding path program 53 times [2022-01-31 23:15:02,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:02,661 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1878450267] [2022-01-31 23:15:02,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:02,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:02,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:02,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:03,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:03,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:15:03,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:15:03,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:15:03,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:15:03,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:15:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:15:03,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:15:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:15:03,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:15:03,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:15:03,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:15:03,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:15:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:03,549 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:03,549 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1878450267] [2022-01-31 23:15:03,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1878450267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:03,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:03,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:15:03,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900269253] [2022-01-31 23:15:03,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:03,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:15:03,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:03,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:15:03,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:15:03,551 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:05,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:05,482 INFO L93 Difference]: Finished difference Result 246 states and 273 transitions. [2022-01-31 23:15:05,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:15:05,483 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 138 [2022-01-31 23:15:05,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:05,483 INFO L225 Difference]: With dead ends: 246 [2022-01-31 23:15:05,483 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 23:15:05,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=553, Invalid=4559, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:15:05,484 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 170 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:05,484 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 137 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 23:15:05,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 23:15:05,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 233. [2022-01-31 23:15:05,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 179 states have internal predecessors, (181), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 23:15:05,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 258 transitions. [2022-01-31 23:15:05,644 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 258 transitions. Word has length 138 [2022-01-31 23:15:05,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:05,644 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 258 transitions. [2022-01-31 23:15:05,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:05,644 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 258 transitions. [2022-01-31 23:15:05,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 23:15:05,645 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:05,645 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:05,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 23:15:05,645 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:05,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:05,645 INFO L85 PathProgramCache]: Analyzing trace with hash -1499025105, now seen corresponding path program 54 times [2022-01-31 23:15:05,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:05,646 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2131001839] [2022-01-31 23:15:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:05,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:05,648 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:05,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:06,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:06,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:15:06,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:15:06,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:15:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:15:06,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:15:06,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:15:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:15:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:15:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:15:06,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:15:06,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:15:06,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:15:06,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:06,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:06,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:06,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2131001839] [2022-01-31 23:15:06,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2131001839] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:06,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:06,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:15:06,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251134150] [2022-01-31 23:15:06,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:06,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:15:06,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:06,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:15:06,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:15:06,539 INFO L87 Difference]: Start difference. First operand 233 states and 258 transitions. Second operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:08,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:08,792 INFO L93 Difference]: Finished difference Result 304 states and 344 transitions. [2022-01-31 23:15:08,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:15:08,792 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 140 [2022-01-31 23:15:08,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:08,793 INFO L225 Difference]: With dead ends: 304 [2022-01-31 23:15:08,793 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 23:15:08,794 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=561, Invalid=5139, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:15:08,794 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 170 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:08,794 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 147 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:15:08,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 23:15:08,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 235. [2022-01-31 23:15:08,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 181 states have internal predecessors, (184), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 23:15:08,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 261 transitions. [2022-01-31 23:15:08,959 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 261 transitions. Word has length 140 [2022-01-31 23:15:08,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:08,959 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 261 transitions. [2022-01-31 23:15:08,960 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:08,960 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 261 transitions. [2022-01-31 23:15:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 23:15:08,960 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:08,960 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:08,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 23:15:08,961 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:08,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:08,961 INFO L85 PathProgramCache]: Analyzing trace with hash 1505179751, now seen corresponding path program 55 times [2022-01-31 23:15:08,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:08,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379865692] [2022-01-31 23:15:08,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:08,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:08,963 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:08,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:15:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:15:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:15:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:15:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:15:09,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:15:09,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:15:09,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:15:09,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:15:09,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:15:09,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:15:09,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:15:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:15:09,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:09,826 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:09,826 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:09,826 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379865692] [2022-01-31 23:15:09,826 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1379865692] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:09,826 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:09,826 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 23:15:09,826 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188151890] [2022-01-31 23:15:09,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:09,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 23:15:09,826 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:09,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 23:15:09,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2022-01-31 23:15:09,827 INFO L87 Difference]: Start difference. First operand 235 states and 261 transitions. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:12,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:12,089 INFO L93 Difference]: Finished difference Result 302 states and 342 transitions. [2022-01-31 23:15:12,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 23:15:12,089 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 142 [2022-01-31 23:15:12,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:12,090 INFO L225 Difference]: With dead ends: 302 [2022-01-31 23:15:12,090 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 23:15:12,091 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=4254, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:15:12,091 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 83 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:12,091 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 161 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:15:12,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 23:15:12,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2022-01-31 23:15:12,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 204 states have (on average 1.0294117647058822) internal successors, (210), 208 states have internal predecessors, (210), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 23:15:12,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 305 transitions. [2022-01-31 23:15:12,281 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 305 transitions. Word has length 142 [2022-01-31 23:15:12,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:12,281 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 305 transitions. [2022-01-31 23:15:12,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:12,281 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 305 transitions. [2022-01-31 23:15:12,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 23:15:12,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:12,282 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:12,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 23:15:12,282 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:12,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:12,282 INFO L85 PathProgramCache]: Analyzing trace with hash 1918543373, now seen corresponding path program 56 times [2022-01-31 23:15:12,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:12,282 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [624496768] [2022-01-31 23:15:12,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:12,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:12,284 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:12,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,057 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:13,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:13,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:13,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:15:13,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:15:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:15:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:15:13,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:15:13,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:15:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:15:13,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:15:13,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:15:13,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:15:13,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:15:13,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:15:13,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:13,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:13,092 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:13,092 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [624496768] [2022-01-31 23:15:13,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [624496768] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:13,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:13,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:15:13,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757323929] [2022-01-31 23:15:13,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:13,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:15:13,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:13,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:15:13,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:15:13,093 INFO L87 Difference]: Start difference. First operand 270 states and 305 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:15,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:15,363 INFO L93 Difference]: Finished difference Result 357 states and 410 transitions. [2022-01-31 23:15:15,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:15:15,363 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 142 [2022-01-31 23:15:15,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:15,364 INFO L225 Difference]: With dead ends: 357 [2022-01-31 23:15:15,364 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 23:15:15,365 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=517, Invalid=5645, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:15:15,365 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 138 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:15,365 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 155 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 23:15:15,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 23:15:15,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 272. [2022-01-31 23:15:15,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 206 states have (on average 1.0339805825242718) internal successors, (213), 210 states have internal predecessors, (213), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 23:15:15,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 308 transitions. [2022-01-31 23:15:15,565 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 308 transitions. Word has length 142 [2022-01-31 23:15:15,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:15,565 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 308 transitions. [2022-01-31 23:15:15,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:15,565 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 308 transitions. [2022-01-31 23:15:15,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 23:15:15,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:15,566 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:15,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 23:15:15,566 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:15,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:15,566 INFO L85 PathProgramCache]: Analyzing trace with hash 138505669, now seen corresponding path program 57 times [2022-01-31 23:15:15,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:15,566 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357979404] [2022-01-31 23:15:15,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:15,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:15,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:15,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:16,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:16,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:16,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:15:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:15:16,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:15:16,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:15:16,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:15:16,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:15:16,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:15:16,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:15:16,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:15:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:15:16,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:15:16,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:15:16,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:15:16,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:16,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:16,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:16,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357979404] [2022-01-31 23:15:16,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [357979404] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:16,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:16,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 23:15:16,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726962091] [2022-01-31 23:15:16,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:16,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 23:15:16,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:16,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 23:15:16,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2022-01-31 23:15:16,485 INFO L87 Difference]: Start difference. First operand 272 states and 308 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:19,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:19,149 INFO L93 Difference]: Finished difference Result 304 states and 345 transitions. [2022-01-31 23:15:19,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:15:19,149 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 144 [2022-01-31 23:15:19,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:19,150 INFO L225 Difference]: With dead ends: 304 [2022-01-31 23:15:19,150 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 23:15:19,151 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=348, Invalid=5054, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:15:19,151 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 3355 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:19,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 170 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3355 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:15:19,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 23:15:19,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 237. [2022-01-31 23:15:19,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 180 states have (on average 1.038888888888889) internal successors, (187), 183 states have internal predecessors, (187), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 23:15:19,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 264 transitions. [2022-01-31 23:15:19,320 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 264 transitions. Word has length 144 [2022-01-31 23:15:19,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:19,320 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 264 transitions. [2022-01-31 23:15:19,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:19,320 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 264 transitions. [2022-01-31 23:15:19,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 23:15:19,321 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:19,321 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:19,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 23:15:19,321 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:19,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:19,321 INFO L85 PathProgramCache]: Analyzing trace with hash 551869291, now seen corresponding path program 58 times [2022-01-31 23:15:19,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:19,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493339989] [2022-01-31 23:15:19,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:19,321 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:19,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:20,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:20,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:15:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:15:20,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:15:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:15:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:15:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:15:20,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:15:20,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:15:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:15:20,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:15:20,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:15:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:15:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:20,320 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:20,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493339989] [2022-01-31 23:15:20,320 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493339989] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:20,320 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:20,320 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:15:20,320 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937552621] [2022-01-31 23:15:20,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:15:20,321 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:15:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:15:20,321 INFO L87 Difference]: Start difference. First operand 237 states and 264 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:22,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:22,827 INFO L93 Difference]: Finished difference Result 324 states and 369 transitions. [2022-01-31 23:15:22,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:15:22,828 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 144 [2022-01-31 23:15:22,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:22,829 INFO L225 Difference]: With dead ends: 324 [2022-01-31 23:15:22,829 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 23:15:22,829 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=405, Invalid=5295, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 23:15:22,829 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 122 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 3442 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 3583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:22,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 167 Invalid, 3583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3442 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:15:22,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 23:15:23,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 239. [2022-01-31 23:15:23,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 182 states have (on average 1.043956043956044) internal successors, (190), 185 states have internal predecessors, (190), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 23:15:23,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 267 transitions. [2022-01-31 23:15:23,004 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 267 transitions. Word has length 144 [2022-01-31 23:15:23,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:23,004 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 267 transitions. [2022-01-31 23:15:23,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:23,005 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 267 transitions. [2022-01-31 23:15:23,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 23:15:23,005 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:23,005 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:23,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 23:15:23,006 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1024705443, now seen corresponding path program 59 times [2022-01-31 23:15:23,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:23,006 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912163993] [2022-01-31 23:15:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:23,006 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:23,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:23,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:24,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:24,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:24,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:15:24,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:15:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:15:24,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:15:24,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:15:24,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:15:24,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:15:24,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:15:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:15:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:15:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:15:24,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:15:24,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:15:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:24,075 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:24,075 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912163993] [2022-01-31 23:15:24,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912163993] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:24,075 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:24,075 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:15:24,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85995907] [2022-01-31 23:15:24,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:24,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:15:24,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:24,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:15:24,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1049, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:15:24,076 INFO L87 Difference]: Start difference. First operand 239 states and 267 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:27,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:27,307 INFO L93 Difference]: Finished difference Result 306 states and 348 transitions. [2022-01-31 23:15:27,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 23:15:27,308 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 146 [2022-01-31 23:15:27,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:27,309 INFO L225 Difference]: With dead ends: 306 [2022-01-31 23:15:27,309 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 23:15:27,309 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=457, Invalid=5549, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 23:15:27,312 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 141 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:27,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 180 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:15:27,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 23:15:27,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-01-31 23:15:27,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 230 states have internal predecessors, (234), 53 states have call successors, (53), 19 states have call predecessors, (53), 18 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 23:15:27,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 339 transitions. [2022-01-31 23:15:27,545 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 339 transitions. Word has length 146 [2022-01-31 23:15:27,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:27,545 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 339 transitions. [2022-01-31 23:15:27,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:27,545 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 339 transitions. [2022-01-31 23:15:27,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 23:15:27,546 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:27,546 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:27,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 23:15:27,546 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:27,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:27,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1438069065, now seen corresponding path program 60 times [2022-01-31 23:15:27,547 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:27,547 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794349234] [2022-01-31 23:15:27,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:27,547 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:27,549 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:28,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:15:28,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:15:28,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:15:28,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:15:28,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:15:28,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:15:28,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:15:28,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:15:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:15:28,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:15:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:15:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:15:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:28,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:28,585 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:28,585 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794349234] [2022-01-31 23:15:28,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794349234] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:28,585 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:28,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:15:28,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467804690] [2022-01-31 23:15:28,585 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:28,585 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:15:28,585 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:28,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:15:28,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:15:28,586 INFO L87 Difference]: Start difference. First operand 298 states and 339 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:30,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:30,946 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2022-01-31 23:15:30,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:15:30,946 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 146 [2022-01-31 23:15:30,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:30,947 INFO L225 Difference]: With dead ends: 389 [2022-01-31 23:15:30,947 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 23:15:30,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=341, Invalid=4215, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:15:30,948 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 161 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:30,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:15:30,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 23:15:31,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 347. [2022-01-31 23:15:31,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0342205323193916) internal successors, (272), 268 states have internal predecessors, (272), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:31,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 401 transitions. [2022-01-31 23:15:31,236 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 401 transitions. Word has length 146 [2022-01-31 23:15:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:31,236 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 401 transitions. [2022-01-31 23:15:31,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:31,236 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 401 transitions. [2022-01-31 23:15:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 23:15:31,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:31,237 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:31,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 23:15:31,237 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:31,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:31,237 INFO L85 PathProgramCache]: Analyzing trace with hash -2035803647, now seen corresponding path program 61 times [2022-01-31 23:15:31,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:31,237 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [766772516] [2022-01-31 23:15:31,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:31,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:31,239 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:31,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:32,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:32,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:15:32,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:15:32,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:15:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:15:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:15:32,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:15:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:15:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:15:32,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:15:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:15:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:15:32,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:15:32,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:15:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:32,166 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:32,166 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [766772516] [2022-01-31 23:15:32,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [766772516] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:32,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:32,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:15:32,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113222479] [2022-01-31 23:15:32,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:32,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:15:32,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:32,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:15:32,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:15:32,167 INFO L87 Difference]: Start difference. First operand 347 states and 401 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:35,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:35,434 INFO L93 Difference]: Finished difference Result 415 states and 483 transitions. [2022-01-31 23:15:35,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 23:15:35,434 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 148 [2022-01-31 23:15:35,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:35,435 INFO L225 Difference]: With dead ends: 415 [2022-01-31 23:15:35,435 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 23:15:35,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=393, Invalid=6087, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 23:15:35,436 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 100 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 4333 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:35,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 192 Invalid, 4471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4333 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:15:35,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 23:15:35,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 347. [2022-01-31 23:15:35,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0342205323193916) internal successors, (272), 268 states have internal predecessors, (272), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:35,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 401 transitions. [2022-01-31 23:15:35,722 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 401 transitions. Word has length 148 [2022-01-31 23:15:35,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:35,722 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 401 transitions. [2022-01-31 23:15:35,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:35,722 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 401 transitions. [2022-01-31 23:15:35,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 23:15:35,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:35,723 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:35,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 23:15:35,723 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:35,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:35,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1355159239, now seen corresponding path program 62 times [2022-01-31 23:15:35,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:35,724 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1096094686] [2022-01-31 23:15:35,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:35,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:35,726 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:35,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:35,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:35,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:35,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 23:15:35,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:15:35,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:15:35,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:15:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:15:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:15:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:15:35,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:15:35,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:15:35,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:15:35,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:15:35,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:15:35,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:15:35,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:15:35,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:35,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:35,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1096094686] [2022-01-31 23:15:35,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1096094686] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:35,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:35,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 23:15:35,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384561949] [2022-01-31 23:15:35,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:35,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 23:15:35,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:35,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 23:15:35,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-01-31 23:15:35,963 INFO L87 Difference]: Start difference. First operand 347 states and 401 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:15:36,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:36,778 INFO L93 Difference]: Finished difference Result 417 states and 485 transitions. [2022-01-31 23:15:36,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 23:15:36,778 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 150 [2022-01-31 23:15:36,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:36,779 INFO L225 Difference]: With dead ends: 417 [2022-01-31 23:15:36,779 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 23:15:36,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=526, Invalid=1924, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 23:15:36,780 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 177 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:36,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 83 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:15:36,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 23:15:37,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2022-01-31 23:15:37,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0304182509505704) internal successors, (271), 268 states have internal predecessors, (271), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:37,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 400 transitions. [2022-01-31 23:15:37,064 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 400 transitions. Word has length 150 [2022-01-31 23:15:37,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:37,065 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 400 transitions. [2022-01-31 23:15:37,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:15:37,065 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 400 transitions. [2022-01-31 23:15:37,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 23:15:37,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:37,066 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:37,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 23:15:37,066 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:37,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:37,066 INFO L85 PathProgramCache]: Analyzing trace with hash -1622440025, now seen corresponding path program 63 times [2022-01-31 23:15:37,066 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:37,066 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [419311849] [2022-01-31 23:15:37,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:37,066 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:37,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:37,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:38,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:38,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:15:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:15:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:15:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:15:38,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:15:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:15:38,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:15:38,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:15:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:15:38,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:15:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:15:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:15:38,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:38,198 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:38,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [419311849] [2022-01-31 23:15:38,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [419311849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:38,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:38,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:15:38,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871911546] [2022-01-31 23:15:38,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:38,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:15:38,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:38,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:15:38,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:15:38,200 INFO L87 Difference]: Start difference. First operand 347 states and 400 transitions. Second operand has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:41,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:41,071 INFO L93 Difference]: Finished difference Result 449 states and 522 transitions. [2022-01-31 23:15:41,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:15:41,072 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 148 [2022-01-31 23:15:41,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:41,073 INFO L225 Difference]: With dead ends: 449 [2022-01-31 23:15:41,073 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 23:15:41,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=450, Invalid=5402, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 23:15:41,074 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 177 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:41,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 178 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 3989 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:15:41,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 23:15:41,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 349. [2022-01-31 23:15:41,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 23:15:41,368 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 148 [2022-01-31 23:15:41,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:41,368 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 23:15:41,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:41,368 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 23:15:41,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 23:15:41,369 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:41,369 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:41,369 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 23:15:41,369 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:41,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:41,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1132441377, now seen corresponding path program 64 times [2022-01-31 23:15:41,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:41,369 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1507873940] [2022-01-31 23:15:41,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:41,370 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:41,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:41,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:42,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:42,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:42,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:15:42,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:15:42,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:15:42,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:15:42,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:15:42,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:15:42,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:15:42,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:15:42,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:15:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:15:42,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:15:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:15:42,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:15:42,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:42,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:42,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:42,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1507873940] [2022-01-31 23:15:42,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1507873940] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:42,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:42,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:15:42,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641607098] [2022-01-31 23:15:42,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:42,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:15:42,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:42,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:15:42,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:15:42,271 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:45,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:45,681 INFO L93 Difference]: Finished difference Result 419 states and 487 transitions. [2022-01-31 23:15:45,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 23:15:45,681 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 150 [2022-01-31 23:15:45,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:45,682 INFO L225 Difference]: With dead ends: 419 [2022-01-31 23:15:45,682 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 23:15:45,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=412, Invalid=6560, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:15:45,683 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 109 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4706 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 4857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 4706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:45,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 197 Invalid, 4857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 4706 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:15:45,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 23:15:45,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2022-01-31 23:15:45,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:45,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 23:15:45,978 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 150 [2022-01-31 23:15:45,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:45,978 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 23:15:45,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:15:45,979 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 23:15:45,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 23:15:45,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:45,980 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:45,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 23:15:45,980 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:45,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:45,980 INFO L85 PathProgramCache]: Analyzing trace with hash -807411561, now seen corresponding path program 65 times [2022-01-31 23:15:45,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:45,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269895070] [2022-01-31 23:15:45,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:45,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:45,982 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:45,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:46,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:46,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:15:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:15:46,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:15:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:15:46,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:15:46,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:15:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:15:46,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:15:46,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:15:46,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:15:46,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:15:46,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:15:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:15:46,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:15:46,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:46,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:46,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:46,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269895070] [2022-01-31 23:15:46,876 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269895070] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:46,876 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:46,876 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:15:46,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180098881] [2022-01-31 23:15:46,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:46,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:15:46,881 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:46,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:15:46,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:15:46,881 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:15:49,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:49,592 INFO L93 Difference]: Finished difference Result 385 states and 445 transitions. [2022-01-31 23:15:49,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 23:15:49,593 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 152 [2022-01-31 23:15:49,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:49,594 INFO L225 Difference]: With dead ends: 385 [2022-01-31 23:15:49,595 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 23:15:49,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 23:15:49,595 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3309 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:49,595 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 176 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3309 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 23:15:49,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 23:15:49,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 349. [2022-01-31 23:15:49,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:49,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 23:15:49,895 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 152 [2022-01-31 23:15:49,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:49,896 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 23:15:49,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:15:49,896 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 23:15:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 23:15:49,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:49,897 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:49,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 23:15:49,897 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:49,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:49,897 INFO L85 PathProgramCache]: Analyzing trace with hash -719077755, now seen corresponding path program 66 times [2022-01-31 23:15:49,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:49,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [882974534] [2022-01-31 23:15:49,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:49,897 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:49,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:49,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:51,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:51,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:51,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:15:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:15:51,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:15:51,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:15:51,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:15:51,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:15:51,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:15:51,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:15:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:15:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:15:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:15:51,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:15:51,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:51,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:51,164 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:51,164 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [882974534] [2022-01-31 23:15:51,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [882974534] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:51,164 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:51,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:15:51,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726982025] [2022-01-31 23:15:51,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:51,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:15:51,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:51,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:15:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:15:51,165 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:54,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:15:54,419 INFO L93 Difference]: Finished difference Result 454 states and 528 transitions. [2022-01-31 23:15:54,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 23:15:54,420 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 150 [2022-01-31 23:15:54,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:15:54,421 INFO L225 Difference]: With dead ends: 454 [2022-01-31 23:15:54,421 INFO L226 Difference]: Without dead ends: 452 [2022-01-31 23:15:54,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=452, Invalid=5868, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 23:15:54,422 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 180 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 4307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:15:54,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 179 Invalid, 4307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 4097 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:15:54,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-31 23:15:54,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 351. [2022-01-31 23:15:54,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.0374531835205993) internal successors, (277), 272 states have internal predecessors, (277), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:15:54,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2022-01-31 23:15:54,719 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 150 [2022-01-31 23:15:54,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:15:54,719 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2022-01-31 23:15:54,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:15:54,720 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2022-01-31 23:15:54,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 23:15:54,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:15:54,721 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:15:54,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 23:15:54,721 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:15:54,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:15:54,721 INFO L85 PathProgramCache]: Analyzing trace with hash -584693699, now seen corresponding path program 67 times [2022-01-31 23:15:54,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:15:54,721 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [799684521] [2022-01-31 23:15:54,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:15:54,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:15:54,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:15:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:15:55,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:15:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:15:55,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:15:55,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:15:55,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:15:55,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:15:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:15:55,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:15:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:15:55,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:15:55,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:15:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:15:55,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:15:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:15:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:15:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:15:55,875 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:15:55,875 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:15:55,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [799684521] [2022-01-31 23:15:55,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [799684521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:15:55,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:15:55,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:15:55,876 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928117800] [2022-01-31 23:15:55,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:15:55,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:15:55,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:15:55,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:15:55,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:15:55,876 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:00,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:00,729 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2022-01-31 23:16:00,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:16:00,729 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 152 [2022-01-31 23:16:00,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:00,731 INFO L225 Difference]: With dead ends: 383 [2022-01-31 23:16:00,731 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 23:16:00,731 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=407, Invalid=6903, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:16:00,731 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5719 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 5875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:00,731 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 220 Invalid, 5875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5719 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:16:00,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 23:16:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 300. [2022-01-31 23:16:00,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 229 states have (on average 1.0436681222707425) internal successors, (239), 233 states have internal predecessors, (239), 52 states have call successors, (52), 19 states have call predecessors, (52), 18 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 23:16:00,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 342 transitions. [2022-01-31 23:16:00,979 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 342 transitions. Word has length 152 [2022-01-31 23:16:00,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:00,979 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 342 transitions. [2022-01-31 23:16:00,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:00,979 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 342 transitions. [2022-01-31 23:16:00,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 23:16:00,980 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:00,980 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:00,980 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 23:16:00,980 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:00,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:00,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1592096885, now seen corresponding path program 68 times [2022-01-31 23:16:00,981 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:00,981 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919776372] [2022-01-31 23:16:00,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:00,981 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:00,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:00,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:01,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:16:01,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:16:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:16:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:16:01,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:16:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:16:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:16:01,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:16:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:16:01,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:16:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:16:01,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:16:01,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:16:01,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:16:01,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:01,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:01,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:01,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919776372] [2022-01-31 23:16:01,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [919776372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:01,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:01,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:16:01,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185960530] [2022-01-31 23:16:01,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:01,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:16:01,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:01,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:16:01,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:16:01,892 INFO L87 Difference]: Start difference. First operand 300 states and 342 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:04,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:04,907 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2022-01-31 23:16:04,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:16:04,908 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 154 [2022-01-31 23:16:04,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:04,909 INFO L225 Difference]: With dead ends: 371 [2022-01-31 23:16:04,909 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 23:16:04,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=373, Invalid=5789, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:16:04,910 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 86 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 3888 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:04,910 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 183 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3888 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 23:16:04,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 23:16:05,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 363. [2022-01-31 23:16:05,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 276 states have (on average 1.036231884057971) internal successors, (286), 281 states have internal predecessors, (286), 67 states have call successors, (67), 20 states have call predecessors, (67), 19 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 23:16:05,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2022-01-31 23:16:05,239 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 154 [2022-01-31 23:16:05,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:05,239 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2022-01-31 23:16:05,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:05,239 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2022-01-31 23:16:05,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 23:16:05,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:05,240 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:05,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 23:16:05,240 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:05,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:05,240 INFO L85 PathProgramCache]: Analyzing trace with hash -171330077, now seen corresponding path program 69 times [2022-01-31 23:16:05,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:05,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269583170] [2022-01-31 23:16:05,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:05,241 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:05,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:05,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:06,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:16:06,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:16:06,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:16:06,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:16:06,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:16:06,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:16:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:16:06,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:16:06,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:16:06,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:16:06,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:16:06,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:16:06,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:06,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:06,503 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:06,503 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269583170] [2022-01-31 23:16:06,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1269583170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:06,503 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:06,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:16:06,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023271027] [2022-01-31 23:16:06,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:06,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:16:06,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:06,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:16:06,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:16:06,504 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:16:09,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:09,646 INFO L93 Difference]: Finished difference Result 416 states and 479 transitions. [2022-01-31 23:16:09,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 23:16:09,647 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 152 [2022-01-31 23:16:09,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:09,648 INFO L225 Difference]: With dead ends: 416 [2022-01-31 23:16:09,649 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 23:16:09,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=302, Invalid=4528, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 23:16:09,649 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 149 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 5325 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 5325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:09,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 207 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 5325 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:16:09,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 23:16:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2022-01-31 23:16:09,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.0297872340425531) internal successors, (242), 239 states have internal predecessors, (242), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 23:16:09,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 351 transitions. [2022-01-31 23:16:09,920 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 351 transitions. Word has length 152 [2022-01-31 23:16:09,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:09,920 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 351 transitions. [2022-01-31 23:16:09,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 23:16:09,920 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 351 transitions. [2022-01-31 23:16:09,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 23:16:09,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:09,921 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:09,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 23:16:09,921 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:09,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:09,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1814814747, now seen corresponding path program 70 times [2022-01-31 23:16:09,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:09,921 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2020657896] [2022-01-31 23:16:09,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:09,922 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:09,924 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:10,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:10,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:10,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:16:10,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:16:10,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:16:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:16:10,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:16:10,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:16:10,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:16:10,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:16:10,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:16:10,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:16:10,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:16:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:16:10,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:16:10,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:10,991 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:10,991 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:10,991 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2020657896] [2022-01-31 23:16:10,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2020657896] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:10,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:10,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:16:10,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589625145] [2022-01-31 23:16:10,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:10,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:16:10,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:10,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:16:10,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:16:10,992 INFO L87 Difference]: Start difference. First operand 310 states and 351 transitions. Second operand has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:15,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:15,619 INFO L93 Difference]: Finished difference Result 404 states and 465 transitions. [2022-01-31 23:16:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:16:15,620 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 154 [2022-01-31 23:16:15,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:15,621 INFO L225 Difference]: With dead ends: 404 [2022-01-31 23:16:15,621 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 23:16:15,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=403, Invalid=6907, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 23:16:15,622 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 131 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5859 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 6018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 5859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:15,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 220 Invalid, 6018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 5859 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:16:15,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 23:16:15,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2022-01-31 23:16:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 281 states have (on average 1.0284697508896796) internal successors, (289), 286 states have internal predecessors, (289), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 23:16:15,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 426 transitions. [2022-01-31 23:16:15,957 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 426 transitions. Word has length 154 [2022-01-31 23:16:15,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:15,957 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 426 transitions. [2022-01-31 23:16:15,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:15,957 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 426 transitions. [2022-01-31 23:16:15,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 23:16:15,958 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:15,958 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:15,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 23:16:15,958 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:15,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:15,958 INFO L85 PathProgramCache]: Analyzing trace with hash 1122275539, now seen corresponding path program 71 times [2022-01-31 23:16:15,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:15,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514354269] [2022-01-31 23:16:15,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:15,959 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:15,961 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:16,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:16,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:16:16,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:16:16,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:16:16,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:16:16,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:16:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:16:16,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:16:16,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:16:16,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:16:16,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:16:16,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:16:16,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:16:16,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:16:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:16:16,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:16,895 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:16,895 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:16,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514354269] [2022-01-31 23:16:16,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514354269] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:16,895 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:16,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:16:16,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802236866] [2022-01-31 23:16:16,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:16,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:16:16,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:16:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:16:16,896 INFO L87 Difference]: Start difference. First operand 371 states and 426 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:20,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:20,225 INFO L93 Difference]: Finished difference Result 442 states and 512 transitions. [2022-01-31 23:16:20,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 23:16:20,226 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 156 [2022-01-31 23:16:20,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:20,227 INFO L225 Difference]: With dead ends: 442 [2022-01-31 23:16:20,227 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 23:16:20,228 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=6407, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 23:16:20,228 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 97 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:20,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 190 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:16:20,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 23:16:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-01-31 23:16:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 322 states have (on average 1.0248447204968945) internal successors, (330), 328 states have internal predecessors, (330), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:16:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 495 transitions. [2022-01-31 23:16:20,645 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 495 transitions. Word has length 156 [2022-01-31 23:16:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:20,645 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 495 transitions. [2022-01-31 23:16:20,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 495 transitions. [2022-01-31 23:16:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 23:16:20,646 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:20,647 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:20,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 23:16:20,647 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:20,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:20,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1344993401, now seen corresponding path program 72 times [2022-01-31 23:16:20,647 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:20,647 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [217821180] [2022-01-31 23:16:20,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:20,647 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:20,649 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:20,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:21,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,740 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:21,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:21,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:16:21,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:16:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:16:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:16:21,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:16:21,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:16:21,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:16:21,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:16:21,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:16:21,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:16:21,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:16:21,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:16:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:16:21,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:21,768 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:21,768 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [217821180] [2022-01-31 23:16:21,768 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [217821180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:21,768 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:21,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:16:21,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388135690] [2022-01-31 23:16:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:21,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:16:21,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:21,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:16:21,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1255, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:16:21,769 INFO L87 Difference]: Start difference. First operand 426 states and 495 transitions. Second operand has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:25,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:25,673 INFO L93 Difference]: Finished difference Result 529 states and 620 transitions. [2022-01-31 23:16:25,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:16:25,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 156 [2022-01-31 23:16:25,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:25,675 INFO L225 Difference]: With dead ends: 529 [2022-01-31 23:16:25,675 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 23:16:25,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=322, Invalid=4790, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 23:16:25,676 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 169 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 6132 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 6310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 6132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:25,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 224 Invalid, 6310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 6132 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:16:25,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 23:16:26,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 428. [2022-01-31 23:16:26,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:16:26,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 23:16:26,090 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 156 [2022-01-31 23:16:26,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:26,090 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 23:16:26,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:26,090 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 23:16:26,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 23:16:26,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:26,091 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:26,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 23:16:26,091 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:26,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:26,091 INFO L85 PathProgramCache]: Analyzing trace with hash 595528113, now seen corresponding path program 73 times [2022-01-31 23:16:26,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:26,091 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [657938585] [2022-01-31 23:16:26,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:26,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:26,094 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:26,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:16:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:16:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:16:27,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:16:27,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:16:27,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:16:27,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:16:27,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:16:27,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:16:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:16:27,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:16:27,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:16:27,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:16:27,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:16:27,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:27,307 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:27,307 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:27,307 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [657938585] [2022-01-31 23:16:27,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [657938585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:27,307 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:27,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:16:27,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89041979] [2022-01-31 23:16:27,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:27,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:16:27,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:27,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:16:27,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:16:27,308 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:31,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:31,930 INFO L93 Difference]: Finished difference Result 499 states and 584 transitions. [2022-01-31 23:16:31,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 23:16:31,930 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 158 [2022-01-31 23:16:31,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:31,932 INFO L225 Difference]: With dead ends: 499 [2022-01-31 23:16:31,932 INFO L226 Difference]: Without dead ends: 497 [2022-01-31 23:16:31,933 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=385, Invalid=6587, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:16:31,933 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 106 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 5151 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 5151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:31,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 5151 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:16:31,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-31 23:16:32,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 428. [2022-01-31 23:16:32,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:16:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 23:16:32,350 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 158 [2022-01-31 23:16:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:32,350 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 23:16:32,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:32,351 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 23:16:32,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 23:16:32,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:32,352 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:32,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 23:16:32,352 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:32,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:32,352 INFO L85 PathProgramCache]: Analyzing trace with hash 856645993, now seen corresponding path program 74 times [2022-01-31 23:16:32,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:32,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726765396] [2022-01-31 23:16:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:32,352 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:32,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:32,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:33,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:16:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:16:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:16:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:16:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:16:33,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:16:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:16:33,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:16:33,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:16:33,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:16:33,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:16:33,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:16:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:16:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:16:33,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:16:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:33,679 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:33,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:33,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726765396] [2022-01-31 23:16:33,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1726765396] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:33,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:33,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 23:16:33,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205046697] [2022-01-31 23:16:33,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:33,680 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 23:16:33,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:33,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 23:16:33,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 23:16:33,681 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:16:36,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:36,883 INFO L93 Difference]: Finished difference Result 468 states and 545 transitions. [2022-01-31 23:16:36,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 23:16:36,884 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 160 [2022-01-31 23:16:36,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:36,885 INFO L225 Difference]: With dead ends: 468 [2022-01-31 23:16:36,885 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 23:16:36,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=5221, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 23:16:36,886 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:36,886 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 173 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 23:16:36,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 23:16:37,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 428. [2022-01-31 23:16:37,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:16:37,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 23:16:37,304 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 160 [2022-01-31 23:16:37,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:37,304 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 23:16:37,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:16:37,304 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 23:16:37,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 23:16:37,306 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:37,306 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:37,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 23:16:37,306 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:37,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:37,306 INFO L85 PathProgramCache]: Analyzing trace with hash 818245975, now seen corresponding path program 75 times [2022-01-31 23:16:37,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:37,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159719061] [2022-01-31 23:16:37,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:37,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:37,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:37,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:38,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:38,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:16:38,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:16:38,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:16:38,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:16:38,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:16:38,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:16:38,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:16:38,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:16:38,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:16:38,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:16:38,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:16:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:16:38,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:16:38,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:38,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:38,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:38,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159719061] [2022-01-31 23:16:38,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [159719061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:38,546 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:38,546 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:16:38,546 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250147563] [2022-01-31 23:16:38,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:38,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:16:38,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:38,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:16:38,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:16:38,547 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:43,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:43,237 INFO L93 Difference]: Finished difference Result 596 states and 702 transitions. [2022-01-31 23:16:43,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:16:43,237 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 158 [2022-01-31 23:16:43,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:43,239 INFO L225 Difference]: With dead ends: 596 [2022-01-31 23:16:43,239 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 23:16:43,239 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=420, Invalid=6222, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:16:43,239 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 189 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6623 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 6623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:43,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 232 Invalid, 6834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 6623 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:16:43,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 23:16:43,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 430. [2022-01-31 23:16:43,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 326 states have (on average 1.030674846625767) internal successors, (336), 332 states have internal predecessors, (336), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:16:43,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 501 transitions. [2022-01-31 23:16:43,664 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 501 transitions. Word has length 158 [2022-01-31 23:16:43,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:43,665 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 501 transitions. [2022-01-31 23:16:43,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:16:43,665 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 501 transitions. [2022-01-31 23:16:43,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 23:16:43,666 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:43,666 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:43,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 23:16:43,666 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:43,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:43,666 INFO L85 PathProgramCache]: Analyzing trace with hash 1197392655, now seen corresponding path program 76 times [2022-01-31 23:16:43,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:43,666 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741320976] [2022-01-31 23:16:43,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:43,667 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:43,669 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:43,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:44,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:44,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:16:44,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:16:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:16:44,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:16:44,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:16:44,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:16:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:16:44,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:16:44,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:16:44,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:16:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:16:44,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:16:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:16:44,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:16:44,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:44,602 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:44,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741320976] [2022-01-31 23:16:44,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741320976] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:44,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:44,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:16:44,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663615459] [2022-01-31 23:16:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:44,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:16:44,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:16:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:16:44,603 INFO L87 Difference]: Start difference. First operand 430 states and 501 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:48,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:48,573 INFO L93 Difference]: Finished difference Result 457 states and 531 transitions. [2022-01-31 23:16:48,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:16:48,573 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 160 [2022-01-31 23:16:48,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:48,575 INFO L225 Difference]: With dead ends: 457 [2022-01-31 23:16:48,575 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 23:16:48,575 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=444, Invalid=7566, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:16:48,575 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 118 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 5908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:48,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 219 Invalid, 5908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:16:48,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 23:16:48,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 375. [2022-01-31 23:16:48,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 285 states have (on average 1.0350877192982457) internal successors, (295), 290 states have internal predecessors, (295), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 23:16:48,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 432 transitions. [2022-01-31 23:16:48,928 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 432 transitions. Word has length 160 [2022-01-31 23:16:48,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:48,928 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 432 transitions. [2022-01-31 23:16:48,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:16:48,928 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 432 transitions. [2022-01-31 23:16:48,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 23:16:48,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:48,929 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:48,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 23:16:48,929 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:48,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:48,929 INFO L85 PathProgramCache]: Analyzing trace with hash -572114105, now seen corresponding path program 77 times [2022-01-31 23:16:48,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:48,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847492932] [2022-01-31 23:16:48,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:48,930 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:48,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:48,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:50,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:50,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:50,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:16:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:16:50,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:16:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:16:50,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:16:50,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:16:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:16:50,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:16:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:16:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:16:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:16:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:16:50,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:16:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:16:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:16:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:50,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:50,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:50,456 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847492932] [2022-01-31 23:16:50,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [847492932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:50,456 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:50,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 23:16:50,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670436966] [2022-01-31 23:16:50,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:50,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 23:16:50,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 23:16:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 23:16:50,457 INFO L87 Difference]: Start difference. First operand 375 states and 432 transitions. Second operand has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:16:54,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:16:54,747 INFO L93 Difference]: Finished difference Result 395 states and 454 transitions. [2022-01-31 23:16:54,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 23:16:54,747 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 162 [2022-01-31 23:16:54,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:16:54,748 INFO L225 Difference]: With dead ends: 395 [2022-01-31 23:16:54,748 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 23:16:54,749 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=418, Invalid=5744, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:16:54,749 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 113 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:16:54,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 186 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3973 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:16:54,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 23:16:55,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 375. [2022-01-31 23:16:55,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 285 states have (on average 1.0350877192982457) internal successors, (295), 290 states have internal predecessors, (295), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 23:16:55,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 432 transitions. [2022-01-31 23:16:55,105 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 432 transitions. Word has length 162 [2022-01-31 23:16:55,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:16:55,105 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 432 transitions. [2022-01-31 23:16:55,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:16:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 432 transitions. [2022-01-31 23:16:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 23:16:55,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:16:55,106 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:16:55,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 23:16:55,106 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:16:55,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:16:55,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1420110517, now seen corresponding path program 78 times [2022-01-31 23:16:55,107 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:16:55,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [609936607] [2022-01-31 23:16:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:16:55,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:16:55,109 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:16:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:16:56,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:16:56,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:16:56,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:16:56,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:16:56,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:16:56,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:16:56,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:16:56,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:16:56,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:16:56,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:16:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:16:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:16:56,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:16:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:16:56,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:16:56,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:16:56,449 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:16:56,449 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:16:56,449 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [609936607] [2022-01-31 23:16:56,449 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [609936607] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:16:56,449 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:16:56,449 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:16:56,449 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46599666] [2022-01-31 23:16:56,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:16:56,449 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:16:56,449 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:16:56,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:16:56,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:16:56,450 INFO L87 Difference]: Start difference. First operand 375 states and 432 transitions. Second operand has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:17:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:01,593 INFO L93 Difference]: Finished difference Result 547 states and 641 transitions. [2022-01-31 23:17:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:17:01,594 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 160 [2022-01-31 23:17:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:01,595 INFO L225 Difference]: With dead ends: 547 [2022-01-31 23:17:01,595 INFO L226 Difference]: Without dead ends: 545 [2022-01-31 23:17:01,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=421, Invalid=6719, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 23:17:01,596 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6981 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 6981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:01,596 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 237 Invalid, 7205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 6981 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 23:17:01,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-31 23:17:01,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 377. [2022-01-31 23:17:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 287 states have (on average 1.038327526132404) internal successors, (298), 292 states have internal predecessors, (298), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 23:17:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 435 transitions. [2022-01-31 23:17:01,956 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 435 transitions. Word has length 160 [2022-01-31 23:17:01,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:01,956 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 435 transitions. [2022-01-31 23:17:01,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:17:01,957 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 435 transitions. [2022-01-31 23:17:01,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 23:17:01,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:01,957 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:01,958 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 23:17:01,958 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:01,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:01,958 INFO L85 PathProgramCache]: Analyzing trace with hash -231367443, now seen corresponding path program 79 times [2022-01-31 23:17:01,958 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:01,958 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528973193] [2022-01-31 23:17:01,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:01,958 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:01,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:01,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:02,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:02,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:02,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:17:02,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:17:02,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:17:02,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:17:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:17:02,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:17:02,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:17:02,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:17:02,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:17:02,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:17:02,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:17:02,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:17:02,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:17:02,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:17:02,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:02,891 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:02,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:02,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528973193] [2022-01-31 23:17:02,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528973193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:02,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:02,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:17:02,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246772825] [2022-01-31 23:17:02,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:02,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:17:02,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:02,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:17:02,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:17:02,892 INFO L87 Difference]: Start difference. First operand 377 states and 435 transitions. Second operand has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:07,071 INFO L93 Difference]: Finished difference Result 468 states and 545 transitions. [2022-01-31 23:17:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:17:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 162 [2022-01-31 23:17:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:07,075 INFO L225 Difference]: With dead ends: 468 [2022-01-31 23:17:07,075 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 23:17:07,076 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=470, Invalid=8272, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 23:17:07,076 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 6022 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 6201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 6022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:07,076 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 222 Invalid, 6201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 6022 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:17:07,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 23:17:07,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 440. [2022-01-31 23:17:07,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 334 states have (on average 1.032934131736527) internal successors, (345), 340 states have internal predecessors, (345), 84 states have call successors, (84), 22 states have call predecessors, (84), 21 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 23:17:07,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 512 transitions. [2022-01-31 23:17:07,507 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 512 transitions. Word has length 162 [2022-01-31 23:17:07,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:07,507 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 512 transitions. [2022-01-31 23:17:07,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:07,507 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 512 transitions. [2022-01-31 23:17:07,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 23:17:07,508 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:07,508 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:07,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 23:17:07,508 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:07,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:07,509 INFO L85 PathProgramCache]: Analyzing trace with hash 778966437, now seen corresponding path program 80 times [2022-01-31 23:17:07,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:07,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003144805] [2022-01-31 23:17:07,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:07,509 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:07,511 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:07,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:08,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:08,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:08,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:17:08,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:17:08,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:17:08,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:17:08,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:17:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:17:08,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:17:08,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:17:08,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:17:08,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:17:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:17:08,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:17:08,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:17:08,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:17:08,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:17:08,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:08,880 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:08,880 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:08,880 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003144805] [2022-01-31 23:17:08,880 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1003144805] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:08,880 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:08,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:17:08,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538357805] [2022-01-31 23:17:08,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:08,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:17:08,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:08,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:17:08,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1185, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:17:08,881 INFO L87 Difference]: Start difference. First operand 440 states and 512 transitions. Second operand has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:13,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:13,190 INFO L93 Difference]: Finished difference Result 515 states and 603 transitions. [2022-01-31 23:17:13,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 23:17:13,190 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 164 [2022-01-31 23:17:13,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:13,192 INFO L225 Difference]: With dead ends: 515 [2022-01-31 23:17:13,192 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 23:17:13,193 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=421, Invalid=6221, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:17:13,193 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 119 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4559 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 4709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:13,193 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 196 Invalid, 4709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4559 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 23:17:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 23:17:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 495. [2022-01-31 23:17:13,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 375 states have (on average 1.0293333333333334) internal successors, (386), 382 states have internal predecessors, (386), 98 states have call successors, (98), 22 states have call predecessors, (98), 21 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 23:17:13,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 581 transitions. [2022-01-31 23:17:13,713 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 581 transitions. Word has length 164 [2022-01-31 23:17:13,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:13,713 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 581 transitions. [2022-01-31 23:17:13,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:13,713 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 581 transitions. [2022-01-31 23:17:13,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 23:17:13,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:13,714 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:13,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 23:17:13,714 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:13,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:13,715 INFO L85 PathProgramCache]: Analyzing trace with hash -8649581, now seen corresponding path program 81 times [2022-01-31 23:17:13,715 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:13,715 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2092691236] [2022-01-31 23:17:13,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:13,715 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:13,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:13,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:14,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:14,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:14,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:17:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:17:14,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:17:14,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:17:14,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:17:14,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:17:14,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:17:14,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:17:14,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:17:14,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:17:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:17:14,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:17:14,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:17:14,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:14,802 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:14,802 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2092691236] [2022-01-31 23:17:14,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2092691236] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:14,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:14,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:17:14,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412875016] [2022-01-31 23:17:14,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:14,803 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:17:14,803 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:14,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:17:14,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:17:14,803 INFO L87 Difference]: Start difference. First operand 495 states and 581 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:17:19,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:19,472 INFO L93 Difference]: Finished difference Result 561 states and 657 transitions. [2022-01-31 23:17:19,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:17:19,473 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 162 [2022-01-31 23:17:19,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:19,474 INFO L225 Difference]: With dead ends: 561 [2022-01-31 23:17:19,474 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 23:17:19,479 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=414, Invalid=8328, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 23:17:19,480 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 157 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 7350 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 7350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:19,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 245 Invalid, 7550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 7350 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:17:19,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 23:17:19,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 442. [2022-01-31 23:17:19,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 334 states have (on average 1.0239520958083832) internal successors, (342), 340 states have internal predecessors, (342), 86 states have call successors, (86), 22 states have call predecessors, (86), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 23:17:19,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 513 transitions. [2022-01-31 23:17:19,942 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 513 transitions. Word has length 162 [2022-01-31 23:17:19,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:19,943 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 513 transitions. [2022-01-31 23:17:19,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 23:17:19,943 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 513 transitions. [2022-01-31 23:17:19,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 23:17:19,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:19,944 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:19,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 23:17:19,944 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:19,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash 1119713099, now seen corresponding path program 82 times [2022-01-31 23:17:19,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:19,944 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065392489] [2022-01-31 23:17:19,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:19,945 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:19,947 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:19,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:20,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:20,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:17:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:17:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:17:20,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:17:20,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:17:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:17:20,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:17:20,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:17:20,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:17:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:17:20,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:17:20,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:17:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:17:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:17:20,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:20,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:20,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:20,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065392489] [2022-01-31 23:17:20,840 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1065392489] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:20,840 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:20,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:17:20,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267978304] [2022-01-31 23:17:20,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:20,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:17:20,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:20,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:17:20,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:17:20,841 INFO L87 Difference]: Start difference. First operand 442 states and 513 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:25,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:25,304 INFO L93 Difference]: Finished difference Result 549 states and 643 transitions. [2022-01-31 23:17:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:17:25,305 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 164 [2022-01-31 23:17:25,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:25,306 INFO L225 Difference]: With dead ends: 549 [2022-01-31 23:17:25,306 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 23:17:25,307 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=466, Invalid=8090, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:17:25,307 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 6927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:25,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 234 Invalid, 6927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:17:25,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 23:17:25,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 507. [2022-01-31 23:17:25,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 383 states have (on average 1.0234986945169713) internal successors, (392), 390 states have internal predecessors, (392), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 23:17:25,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 593 transitions. [2022-01-31 23:17:25,848 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 593 transitions. Word has length 164 [2022-01-31 23:17:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:25,848 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 593 transitions. [2022-01-31 23:17:25,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:25,849 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 593 transitions. [2022-01-31 23:17:25,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 23:17:25,850 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:25,850 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:25,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 23:17:25,850 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:25,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:25,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2087243907, now seen corresponding path program 83 times [2022-01-31 23:17:25,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:25,850 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478010507] [2022-01-31 23:17:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:25,851 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:25,853 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:25,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:27,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:27,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:27,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:17:27,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:17:27,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:17:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:17:27,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:17:27,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:17:27,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:17:27,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:17:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:17:27,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:17:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:17:27,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:17:27,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:17:27,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:17:27,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:17:27,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:27,215 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:27,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:27,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478010507] [2022-01-31 23:17:27,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1478010507] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:27,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:27,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:17:27,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776191421] [2022-01-31 23:17:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:27,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:17:27,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:27,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:17:27,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:17:27,216 INFO L87 Difference]: Start difference. First operand 507 states and 593 transitions. Second operand has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:31,949 INFO L93 Difference]: Finished difference Result 582 states and 684 transitions. [2022-01-31 23:17:31,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:17:31,949 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 166 [2022-01-31 23:17:31,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:31,951 INFO L225 Difference]: With dead ends: 582 [2022-01-31 23:17:31,951 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 23:17:31,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=429, Invalid=7053, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:17:31,952 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 122 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:31,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 203 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:17:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 23:17:32,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 566. [2022-01-31 23:17:32,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 427 states have (on average 1.0210772833723654) internal successors, (436), 435 states have internal predecessors, (436), 116 states have call successors, (116), 23 states have call predecessors, (116), 22 states have return successors, (115), 107 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 23:17:32,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 667 transitions. [2022-01-31 23:17:32,579 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 667 transitions. Word has length 166 [2022-01-31 23:17:32,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:32,579 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 667 transitions. [2022-01-31 23:17:32,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:32,579 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 667 transitions. [2022-01-31 23:17:32,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 23:17:32,580 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:32,580 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:32,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 23:17:32,580 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:32,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:32,581 INFO L85 PathProgramCache]: Analyzing trace with hash -824053701, now seen corresponding path program 84 times [2022-01-31 23:17:32,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:32,581 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384941900] [2022-01-31 23:17:32,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:32,581 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:32,583 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:32,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:32,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:32,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,824 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:32,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 23:17:32,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:17:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:17:32,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:17:32,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:17:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:17:32,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:17:32,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:17:32,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:17:32,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:17:32,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:17:32,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:17:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:17:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:17:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:17:32,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:17:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:32,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:32,860 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:32,860 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384941900] [2022-01-31 23:17:32,860 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384941900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:32,860 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:32,860 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 23:17:32,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336288577] [2022-01-31 23:17:32,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:32,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 23:17:32,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:32,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 23:17:32,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2022-01-31 23:17:32,861 INFO L87 Difference]: Start difference. First operand 566 states and 667 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:17:34,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:34,080 INFO L93 Difference]: Finished difference Result 607 states and 715 transitions. [2022-01-31 23:17:34,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 23:17:34,081 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 168 [2022-01-31 23:17:34,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:34,082 INFO L225 Difference]: With dead ends: 607 [2022-01-31 23:17:34,082 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 23:17:34,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=654, Invalid=2426, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 23:17:34,083 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 165 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:34,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 92 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:17:34,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 23:17:34,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-01-31 23:17:34,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 398 states have (on average 1.020100502512563) internal successors, (406), 405 states have internal predecessors, (406), 107 states have call successors, (107), 22 states have call predecessors, (107), 21 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 23:17:34,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 619 transitions. [2022-01-31 23:17:34,682 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 619 transitions. Word has length 168 [2022-01-31 23:17:34,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:34,682 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 619 transitions. [2022-01-31 23:17:34,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:17:34,682 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 619 transitions. [2022-01-31 23:17:34,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 23:17:34,683 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:34,683 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:34,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 23:17:34,683 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:34,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:34,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1866976727, now seen corresponding path program 85 times [2022-01-31 23:17:34,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:34,684 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192273371] [2022-01-31 23:17:34,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:34,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:34,686 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:34,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:35,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:35,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:35,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:17:35,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:17:35,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:17:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,823 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:17:35,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:17:35,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:17:35,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:17:35,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:17:35,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:17:35,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:17:35,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:17:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:17:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:17:35,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:17:35,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:35,841 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:35,841 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:35,841 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192273371] [2022-01-31 23:17:35,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [192273371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:35,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:35,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:17:35,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886203635] [2022-01-31 23:17:35,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:35,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:17:35,842 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:35,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:17:35,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:17:35,842 INFO L87 Difference]: Start difference. First operand 527 states and 619 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:40,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:40,844 INFO L93 Difference]: Finished difference Result 566 states and 664 transitions. [2022-01-31 23:17:40,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 23:17:40,844 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 166 [2022-01-31 23:17:40,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:40,846 INFO L225 Difference]: With dead ends: 566 [2022-01-31 23:17:40,846 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 23:17:40,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=375, Invalid=7107, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:17:40,847 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 151 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 7114 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 7301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 7114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:40,847 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 241 Invalid, 7301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 7114 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 23:17:40,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 23:17:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 474. [2022-01-31 23:17:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 358 states have (on average 1.0195530726256983) internal successors, (365), 364 states have internal predecessors, (365), 94 states have call successors, (94), 22 states have call predecessors, (94), 21 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 23:17:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 552 transitions. [2022-01-31 23:17:41,376 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 552 transitions. Word has length 166 [2022-01-31 23:17:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:41,376 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 552 transitions. [2022-01-31 23:17:41,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 23:17:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 552 transitions. [2022-01-31 23:17:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 23:17:41,377 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:41,377 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:41,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 23:17:41,377 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:41,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:41,378 INFO L85 PathProgramCache]: Analyzing trace with hash 916474849, now seen corresponding path program 86 times [2022-01-31 23:17:41,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:41,378 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914447224] [2022-01-31 23:17:41,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:41,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:41,380 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:41,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:42,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:42,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:42,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:17:42,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:17:42,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:17:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:17:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:17:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:17:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:17:42,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:17:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:17:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:17:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:17:42,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:17:42,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:17:42,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:17:42,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:17:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:42,418 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:42,418 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:42,418 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914447224] [2022-01-31 23:17:42,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914447224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:42,418 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:42,418 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:17:42,418 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590956129] [2022-01-31 23:17:42,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:42,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:17:42,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:42,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:17:42,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:17:42,419 INFO L87 Difference]: Start difference. First operand 474 states and 552 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:46,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:46,601 INFO L93 Difference]: Finished difference Result 494 states and 574 transitions. [2022-01-31 23:17:46,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:17:46,602 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 168 [2022-01-31 23:17:46,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:46,603 INFO L225 Difference]: With dead ends: 494 [2022-01-31 23:17:46,603 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 23:17:46,604 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=443, Invalid=7747, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 23:17:46,604 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 112 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 5709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:46,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 214 Invalid, 5709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:17:46,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 23:17:47,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 419. [2022-01-31 23:17:47,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 23:17:47,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 483 transitions. [2022-01-31 23:17:47,066 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 483 transitions. Word has length 168 [2022-01-31 23:17:47,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:47,066 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 483 transitions. [2022-01-31 23:17:47,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:47,066 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 483 transitions. [2022-01-31 23:17:47,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 23:17:47,067 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:47,067 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:47,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 23:17:47,068 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:47,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:47,068 INFO L85 PathProgramCache]: Analyzing trace with hash -651686887, now seen corresponding path program 87 times [2022-01-31 23:17:47,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:47,068 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405544624] [2022-01-31 23:17:47,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:47,068 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:47,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:48,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:48,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:48,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:17:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:17:48,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:17:48,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:17:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:17:48,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:17:48,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:17:48,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:17:48,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:17:48,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:17:48,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:17:48,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:17:48,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:17:48,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:17:48,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:17:48,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:17:48,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:48,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:48,494 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:48,494 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405544624] [2022-01-31 23:17:48,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1405544624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:48,494 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:48,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:17:48,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139808270] [2022-01-31 23:17:48,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:48,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:17:48,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:48,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:17:48,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:17:48,495 INFO L87 Difference]: Start difference. First operand 419 states and 483 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:17:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:52,293 INFO L93 Difference]: Finished difference Result 435 states and 500 transitions. [2022-01-31 23:17:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:17:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 170 [2022-01-31 23:17:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:52,294 INFO L225 Difference]: With dead ends: 435 [2022-01-31 23:17:52,295 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 23:17:52,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=336, Invalid=5826, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 23:17:52,295 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 95 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:52,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 184 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 23:17:52,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 23:17:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 415. [2022-01-31 23:17:52,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 314 states have (on average 1.0222929936305734) internal successors, (321), 319 states have internal predecessors, (321), 79 states have call successors, (79), 22 states have call predecessors, (79), 21 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 23:17:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 478 transitions. [2022-01-31 23:17:52,767 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 478 transitions. Word has length 170 [2022-01-31 23:17:52,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:52,768 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 478 transitions. [2022-01-31 23:17:52,768 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:17:52,768 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 478 transitions. [2022-01-31 23:17:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 23:17:52,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:52,769 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:52,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 23:17:52,769 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:52,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1088841663, now seen corresponding path program 88 times [2022-01-31 23:17:52,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:52,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674356160] [2022-01-31 23:17:52,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:52,770 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:52,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:52,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:17:53,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:17:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:17:53,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:17:53,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:17:53,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:17:53,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:17:53,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:17:53,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:17:53,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:17:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:17:53,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:17:53,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:17:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:17:53,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:17:53,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:17:53,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:17:53,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:17:53,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:17:53,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:17:53,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:17:53,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674356160] [2022-01-31 23:17:53,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [674356160] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:17:53,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:17:53,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:17:53,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441919665] [2022-01-31 23:17:53,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:17:53,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:17:53,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:17:53,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:17:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:17:53,963 INFO L87 Difference]: Start difference. First operand 415 states and 478 transitions. Second operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:58,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:17:58,745 INFO L93 Difference]: Finished difference Result 441 states and 507 transitions. [2022-01-31 23:17:58,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 23:17:58,745 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 170 [2022-01-31 23:17:58,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:17:58,747 INFO L225 Difference]: With dead ends: 441 [2022-01-31 23:17:58,747 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 23:17:58,747 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=432, Invalid=8124, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:17:58,747 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 123 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6328 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 6487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:17:58,747 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 228 Invalid, 6487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6328 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 23:17:58,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 23:17:59,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2022-01-31 23:17:59,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 23:17:59,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 483 transitions. [2022-01-31 23:17:59,207 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 483 transitions. Word has length 170 [2022-01-31 23:17:59,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:17:59,207 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 483 transitions. [2022-01-31 23:17:59,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:17:59,208 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 483 transitions. [2022-01-31 23:17:59,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 23:17:59,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:17:59,209 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:17:59,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 23:17:59,209 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:17:59,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:17:59,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1784064119, now seen corresponding path program 89 times [2022-01-31 23:17:59,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:17:59,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1828635224] [2022-01-31 23:17:59,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:17:59,209 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:17:59,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:17:59,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:00,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:00,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:00,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:18:00,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:18:00,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:18:00,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:18:00,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:18:00,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:18:00,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:18:00,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:18:00,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:18:00,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:18:00,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:18:00,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:18:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:18:00,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:18:00,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:18:00,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:18:00,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:00,562 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:00,562 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:00,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1828635224] [2022-01-31 23:18:00,563 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1828635224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:00,563 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:00,563 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:18:00,563 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958923997] [2022-01-31 23:18:00,563 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:00,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:18:00,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:00,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:18:00,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:18:00,563 INFO L87 Difference]: Start difference. First operand 419 states and 483 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:04,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:04,766 INFO L93 Difference]: Finished difference Result 435 states and 500 transitions. [2022-01-31 23:18:04,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 23:18:04,771 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 172 [2022-01-31 23:18:04,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:04,772 INFO L225 Difference]: With dead ends: 435 [2022-01-31 23:18:04,772 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 23:18:04,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 23:18:04,773 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 4858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:04,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 199 Invalid, 4858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4736 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:18:04,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 23:18:05,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 411. [2022-01-31 23:18:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 311 states have (on average 1.022508038585209) internal successors, (318), 316 states have internal predecessors, (318), 78 states have call successors, (78), 22 states have call predecessors, (78), 21 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 23:18:05,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 473 transitions. [2022-01-31 23:18:05,216 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 473 transitions. Word has length 172 [2022-01-31 23:18:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:05,216 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 473 transitions. [2022-01-31 23:18:05,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 473 transitions. [2022-01-31 23:18:05,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 23:18:05,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:05,217 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:05,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 23:18:05,218 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:05,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:05,218 INFO L85 PathProgramCache]: Analyzing trace with hash -770374627, now seen corresponding path program 90 times [2022-01-31 23:18:05,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:05,218 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473658922] [2022-01-31 23:18:05,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:05,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:05,220 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:05,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:06,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:18:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:18:06,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:18:06,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:18:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:18:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:18:06,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:18:06,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:18:06,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:18:06,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:18:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:18:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:18:06,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:18:06,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:18:06,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:18:06,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:06,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:06,233 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:06,233 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473658922] [2022-01-31 23:18:06,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1473658922] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:06,233 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:06,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:18:06,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805386877] [2022-01-31 23:18:06,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:06,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:18:06,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:06,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:18:06,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:18:06,234 INFO L87 Difference]: Start difference. First operand 411 states and 473 transitions. Second operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:11,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:11,128 INFO L93 Difference]: Finished difference Result 492 states and 571 transitions. [2022-01-31 23:18:11,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 23:18:11,128 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 172 [2022-01-31 23:18:11,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:11,130 INFO L225 Difference]: With dead ends: 492 [2022-01-31 23:18:11,130 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 23:18:11,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=9207, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:18:11,131 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 136 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 6989 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 6989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:11,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 239 Invalid, 7179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 6989 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:18:11,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 23:18:11,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 480. [2022-01-31 23:18:11,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 363 states have (on average 1.022038567493113) internal successors, (371), 369 states have internal predecessors, (371), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 23:18:11,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 558 transitions. [2022-01-31 23:18:11,670 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 558 transitions. Word has length 172 [2022-01-31 23:18:11,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:11,670 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 558 transitions. [2022-01-31 23:18:11,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:11,670 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 558 transitions. [2022-01-31 23:18:11,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 23:18:11,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:11,671 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:11,671 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 23:18:11,671 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:11,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:11,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1783604565, now seen corresponding path program 91 times [2022-01-31 23:18:11,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:11,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457203055] [2022-01-31 23:18:11,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:11,672 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:11,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:11,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:12,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:12,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:12,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:18:12,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:18:12,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:18:12,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:18:12,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:18:12,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:18:12,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:18:12,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:18:12,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:18:12,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:18:12,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:18:12,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:18:12,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:18:12,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:18:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:18:12,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:18:12,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:12,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:12,799 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:12,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457203055] [2022-01-31 23:18:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1457203055] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:12,799 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:12,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:18:12,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363858622] [2022-01-31 23:18:12,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:12,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:18:12,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:12,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:18:12,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:18:12,800 INFO L87 Difference]: Start difference. First operand 480 states and 558 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:17,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:17,085 INFO L93 Difference]: Finished difference Result 559 states and 654 transitions. [2022-01-31 23:18:17,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 23:18:17,085 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 174 [2022-01-31 23:18:17,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:17,087 INFO L225 Difference]: With dead ends: 559 [2022-01-31 23:18:17,087 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 23:18:17,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=430, Invalid=7580, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 23:18:17,087 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 101 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:17,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 210 Invalid, 5469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5322 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:18:17,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 23:18:17,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 539. [2022-01-31 23:18:17,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 407 states have (on average 1.0196560196560196) internal successors, (415), 414 states have internal predecessors, (415), 109 states have call successors, (109), 23 states have call predecessors, (109), 22 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:18:17,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 632 transitions. [2022-01-31 23:18:17,712 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 632 transitions. Word has length 174 [2022-01-31 23:18:17,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:17,712 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 632 transitions. [2022-01-31 23:18:17,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:17,712 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 632 transitions. [2022-01-31 23:18:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 23:18:17,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:17,714 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:17,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 23:18:17,714 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:17,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:17,714 INFO L85 PathProgramCache]: Analyzing trace with hash -770834181, now seen corresponding path program 92 times [2022-01-31 23:18:17,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:17,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209662037] [2022-01-31 23:18:17,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:17,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:17,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:17,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:18,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:18,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:18,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:18:18,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:18:18,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:18:18,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:18:18,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:18:18,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:18:18,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:18:18,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:18:18,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:18:18,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:18:18,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:18:18,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:18:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:18:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:18:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:18:18,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:18,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:18,722 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:18,722 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209662037] [2022-01-31 23:18:18,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209662037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:18,722 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:18,722 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:18:18,722 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825386039] [2022-01-31 23:18:18,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:18,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:18:18,723 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:18,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:18:18,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1480, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:18:18,723 INFO L87 Difference]: Start difference. First operand 539 states and 632 transitions. Second operand has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:23,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:23,796 INFO L93 Difference]: Finished difference Result 639 states and 753 transitions. [2022-01-31 23:18:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:18:23,796 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 174 [2022-01-31 23:18:23,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:23,798 INFO L225 Difference]: With dead ends: 639 [2022-01-31 23:18:23,798 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 23:18:23,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=491, Invalid=9015, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 23:18:23,799 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 146 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 7507 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 7703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 7507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:23,799 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 247 Invalid, 7703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 7507 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:18:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 23:18:24,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 541. [2022-01-31 23:18:24,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 409 states have (on average 1.02200488997555) internal successors, (418), 416 states have internal predecessors, (418), 109 states have call successors, (109), 23 states have call predecessors, (109), 22 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:18:24,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 635 transitions. [2022-01-31 23:18:24,424 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 635 transitions. Word has length 174 [2022-01-31 23:18:24,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:24,424 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 635 transitions. [2022-01-31 23:18:24,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:24,424 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 635 transitions. [2022-01-31 23:18:24,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 23:18:24,425 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:24,425 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:24,425 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 23:18:24,425 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:24,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:24,425 INFO L85 PathProgramCache]: Analyzing trace with hash 1341973171, now seen corresponding path program 93 times [2022-01-31 23:18:24,426 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:24,426 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [993040] [2022-01-31 23:18:24,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:24,426 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:24,428 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:24,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:25,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:25,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:18:25,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:18:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:18:25,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:18:25,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:18:25,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:18:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:18:25,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:18:25,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:18:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:18:25,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:18:25,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:18:25,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:18:25,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:18:25,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:18:25,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:18:25,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:25,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:25,563 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:25,563 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [993040] [2022-01-31 23:18:25,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [993040] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:25,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:25,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:18:25,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373648246] [2022-01-31 23:18:25,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:25,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:18:25,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:25,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:18:25,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:18:25,565 INFO L87 Difference]: Start difference. First operand 541 states and 635 transitions. Second operand has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:30,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:30,034 INFO L93 Difference]: Finished difference Result 565 states and 662 transitions. [2022-01-31 23:18:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:18:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 176 [2022-01-31 23:18:30,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:30,036 INFO L225 Difference]: With dead ends: 565 [2022-01-31 23:18:30,036 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 23:18:30,037 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=456, Invalid=8286, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 23:18:30,037 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 113 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 6064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:30,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 221 Invalid, 6064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:18:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 23:18:30,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 486. [2022-01-31 23:18:30,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 368 states have (on average 1.0244565217391304) internal successors, (377), 374 states have internal predecessors, (377), 95 states have call successors, (95), 23 states have call predecessors, (95), 22 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-31 23:18:30,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 566 transitions. [2022-01-31 23:18:30,592 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 566 transitions. Word has length 176 [2022-01-31 23:18:30,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:30,592 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 566 transitions. [2022-01-31 23:18:30,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:30,592 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 566 transitions. [2022-01-31 23:18:30,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 23:18:30,593 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:30,593 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:30,593 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 23:18:30,593 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:30,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:30,594 INFO L85 PathProgramCache]: Analyzing trace with hash 1035791083, now seen corresponding path program 94 times [2022-01-31 23:18:30,594 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:30,594 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361695006] [2022-01-31 23:18:30,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:30,594 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:30,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:31,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:31,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:18:31,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:18:31,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:18:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:18:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:18:31,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:18:31,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:18:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:18:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:18:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:18:31,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:18:31,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:18:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:18:31,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:18:31,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:18:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:18:31,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:18:31,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:31,748 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:31,748 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:31,748 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361695006] [2022-01-31 23:18:31,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [361695006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:31,748 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:31,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 23:18:31,748 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090049833] [2022-01-31 23:18:31,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:31,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 23:18:31,748 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:31,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 23:18:31,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 23:18:31,749 INFO L87 Difference]: Start difference. First operand 486 states and 566 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:18:35,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:35,274 INFO L93 Difference]: Finished difference Result 506 states and 588 transitions. [2022-01-31 23:18:35,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 23:18:35,274 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 178 [2022-01-31 23:18:35,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:35,276 INFO L225 Difference]: With dead ends: 506 [2022-01-31 23:18:35,276 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 23:18:35,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=364, Invalid=6278, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 23:18:35,277 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:35,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 189 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 23:18:35,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 23:18:35,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 482. [2022-01-31 23:18:35,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 365 states have (on average 1.0246575342465754) internal successors, (374), 371 states have internal predecessors, (374), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 23:18:35,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 561 transitions. [2022-01-31 23:18:35,825 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 561 transitions. Word has length 178 [2022-01-31 23:18:35,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:35,825 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 561 transitions. [2022-01-31 23:18:35,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:18:35,825 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 561 transitions. [2022-01-31 23:18:35,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 23:18:35,826 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:35,826 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:35,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 23:18:35,826 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:35,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:35,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1212465575, now seen corresponding path program 95 times [2022-01-31 23:18:35,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:35,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2082688795] [2022-01-31 23:18:35,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:35,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:35,830 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:35,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:37,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:37,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:18:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:18:37,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:18:37,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:18:37,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:18:37,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:18:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:18:37,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:18:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:18:37,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:18:37,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:18:37,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:18:37,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:18:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:18:37,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:18:37,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:37,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:37,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:37,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2082688795] [2022-01-31 23:18:37,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2082688795] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:37,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:37,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:18:37,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140576237] [2022-01-31 23:18:37,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:37,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:18:37,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:37,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:18:37,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:18:37,121 INFO L87 Difference]: Start difference. First operand 482 states and 561 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:42,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:42,544 INFO L93 Difference]: Finished difference Result 541 states and 630 transitions. [2022-01-31 23:18:42,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 23:18:42,544 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 176 [2022-01-31 23:18:42,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:42,546 INFO L225 Difference]: With dead ends: 541 [2022-01-31 23:18:42,546 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 23:18:42,546 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=397, Invalid=7975, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:18:42,546 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 161 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7810 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 8009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:42,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 251 Invalid, 8009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 7810 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 23:18:42,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 23:18:43,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 427. [2022-01-31 23:18:43,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 323 states have (on average 1.021671826625387) internal successors, (330), 328 states have internal predecessors, (330), 81 states have call successors, (81), 23 states have call predecessors, (81), 22 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 23:18:43,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 491 transitions. [2022-01-31 23:18:43,026 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 491 transitions. Word has length 176 [2022-01-31 23:18:43,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:43,027 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 491 transitions. [2022-01-31 23:18:43,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 23:18:43,027 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 491 transitions. [2022-01-31 23:18:43,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 23:18:43,028 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:43,028 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:43,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 23:18:43,028 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:43,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:43,028 INFO L85 PathProgramCache]: Analyzing trace with hash 2135965841, now seen corresponding path program 96 times [2022-01-31 23:18:43,028 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:43,028 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1222166461] [2022-01-31 23:18:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:43,029 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:43,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:43,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:44,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:44,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:44,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:18:44,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:18:44,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:18:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:18:44,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:18:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:18:44,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:18:44,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:18:44,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:18:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:18:44,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:18:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:18:44,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:18:44,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:18:44,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:18:44,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:18:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:44,196 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:44,196 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:44,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1222166461] [2022-01-31 23:18:44,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1222166461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:44,198 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:44,198 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:18:44,198 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598793427] [2022-01-31 23:18:44,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:44,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:18:44,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:44,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:18:44,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:18:44,199 INFO L87 Difference]: Start difference. First operand 427 states and 491 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:48,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:48,860 INFO L93 Difference]: Finished difference Result 457 states and 525 transitions. [2022-01-31 23:18:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 23:18:48,861 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 178 [2022-01-31 23:18:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:48,862 INFO L225 Difference]: With dead ends: 457 [2022-01-31 23:18:48,862 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 23:18:48,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=475, Invalid=8837, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 23:18:48,863 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 121 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6402 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 6575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:48,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 227 Invalid, 6575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6402 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 23:18:48,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 23:18:49,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 431. [2022-01-31 23:18:49,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 326 states have (on average 1.021472392638037) internal successors, (333), 331 states have internal predecessors, (333), 82 states have call successors, (82), 23 states have call predecessors, (82), 22 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 23:18:49,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 496 transitions. [2022-01-31 23:18:49,356 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 496 transitions. Word has length 178 [2022-01-31 23:18:49,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:49,357 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 496 transitions. [2022-01-31 23:18:49,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:18:49,357 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 496 transitions. [2022-01-31 23:18:49,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 23:18:49,358 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:49,358 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:49,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 23:18:49,358 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:49,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:49,358 INFO L85 PathProgramCache]: Analyzing trace with hash -441431735, now seen corresponding path program 97 times [2022-01-31 23:18:49,358 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:49,358 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595289157] [2022-01-31 23:18:49,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:49,359 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:49,361 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:49,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:50,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:18:50,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:18:50,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:18:50,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:18:50,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:18:50,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:18:50,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:18:50,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:18:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:18:50,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:18:50,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:18:50,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:18:50,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:18:50,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:18:50,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:18:50,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:18:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:18:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:50,502 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:50,502 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595289157] [2022-01-31 23:18:50,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595289157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:50,502 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:50,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 23:18:50,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853748701] [2022-01-31 23:18:50,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:50,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 23:18:50,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:50,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 23:18:50,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 23:18:50,503 INFO L87 Difference]: Start difference. First operand 431 states and 496 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:18:54,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:18:54,494 INFO L93 Difference]: Finished difference Result 447 states and 513 transitions. [2022-01-31 23:18:54,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 23:18:54,494 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 180 [2022-01-31 23:18:54,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:18:54,495 INFO L225 Difference]: With dead ends: 447 [2022-01-31 23:18:54,495 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 23:18:54,496 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=410, Invalid=7246, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:18:54,496 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:18:54,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 210 Invalid, 5228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:18:54,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 23:18:54,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 419. [2022-01-31 23:18:54,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 79 states have call successors, (79), 23 states have call predecessors, (79), 22 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 23:18:54,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 481 transitions. [2022-01-31 23:18:54,966 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 481 transitions. Word has length 180 [2022-01-31 23:18:54,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:18:54,966 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 481 transitions. [2022-01-31 23:18:54,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:18:54,967 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 481 transitions. [2022-01-31 23:18:54,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 23:18:54,967 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:18:54,968 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:18:54,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 23:18:54,968 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:18:54,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:18:54,968 INFO L85 PathProgramCache]: Analyzing trace with hash 658743023, now seen corresponding path program 98 times [2022-01-31 23:18:54,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:18:54,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429740693] [2022-01-31 23:18:54,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:18:54,968 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:18:54,971 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:18:55,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:18:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,332 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:18:56,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:18:56,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:18:56,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:18:56,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:18:56,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:18:56,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:18:56,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:18:56,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:18:56,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:18:56,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:18:56,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:18:56,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:18:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:18:56,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:18:56,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:18:56,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:18:56,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:18:56,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:18:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:18:56,360 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:18:56,360 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429740693] [2022-01-31 23:18:56,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429740693] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:18:56,360 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:18:56,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:18:56,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732004674] [2022-01-31 23:18:56,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:18:56,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:18:56,360 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:18:56,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:18:56,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:18:56,361 INFO L87 Difference]: Start difference. First operand 419 states and 481 transitions. Second operand has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:02,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:02,194 INFO L93 Difference]: Finished difference Result 502 states and 582 transitions. [2022-01-31 23:19:02,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:19:02,195 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 180 [2022-01-31 23:19:02,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:02,196 INFO L225 Difference]: With dead ends: 502 [2022-01-31 23:19:02,196 INFO L226 Difference]: Without dead ends: 500 [2022-01-31 23:19:02,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=462, Invalid=9240, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:19:02,197 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 133 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7276 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 7276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:02,197 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 242 Invalid, 7449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 7276 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:19:02,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-31 23:19:02,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 492. [2022-01-31 23:19:02,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 372 states have (on average 1.021505376344086) internal successors, (380), 378 states have internal predecessors, (380), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 23:19:02,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 571 transitions. [2022-01-31 23:19:02,776 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 571 transitions. Word has length 180 [2022-01-31 23:19:02,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:02,776 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 571 transitions. [2022-01-31 23:19:02,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:02,776 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 571 transitions. [2022-01-31 23:19:02,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 23:19:02,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:02,777 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:02,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 23:19:02,777 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:02,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:02,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1581615143, now seen corresponding path program 99 times [2022-01-31 23:19:02,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:02,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117668020] [2022-01-31 23:19:02,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:02,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:02,781 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:02,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:03,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:03,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:19:03,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:19:03,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:19:03,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:19:03,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:19:03,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:19:03,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:19:03,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:19:03,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:19:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:19:03,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:19:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:19:03,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:19:03,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:19:03,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:19:03,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:19:03,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:19:03,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:03,954 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:03,954 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:03,955 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117668020] [2022-01-31 23:19:03,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117668020] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:03,955 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:03,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:19:03,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469149124] [2022-01-31 23:19:03,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:03,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:19:03,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:03,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:19:03,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:19:03,956 INFO L87 Difference]: Start difference. First operand 492 states and 571 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:08,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:08,392 INFO L93 Difference]: Finished difference Result 575 states and 672 transitions. [2022-01-31 23:19:08,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:19:08,392 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 182 [2022-01-31 23:19:08,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:08,393 INFO L225 Difference]: With dead ends: 575 [2022-01-31 23:19:08,394 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 23:19:08,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=436, Invalid=7936, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 23:19:08,394 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 99 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 5580 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 5726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 5580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:08,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 217 Invalid, 5726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 5580 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 23:19:08,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 23:19:09,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 551. [2022-01-31 23:19:09,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 416 states have (on average 1.0192307692307692) internal successors, (424), 423 states have internal predecessors, (424), 111 states have call successors, (111), 24 states have call predecessors, (111), 23 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 23:19:09,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 645 transitions. [2022-01-31 23:19:09,061 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 645 transitions. Word has length 182 [2022-01-31 23:19:09,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:09,061 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 645 transitions. [2022-01-31 23:19:09,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:09,061 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 645 transitions. [2022-01-31 23:19:09,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 23:19:09,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:09,062 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:09,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 23:19:09,063 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:09,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:09,063 INFO L85 PathProgramCache]: Analyzing trace with hash -1613177395, now seen corresponding path program 100 times [2022-01-31 23:19:09,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:09,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [982247288] [2022-01-31 23:19:09,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:09,063 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:09,066 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:09,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:10,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:19:10,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:19:10,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:19:10,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:19:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:19:10,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:19:10,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:19:10,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:19:10,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:19:10,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:19:10,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:19:10,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:19:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:19:10,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:19:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:19:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:19:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:10,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:10,443 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:10,443 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [982247288] [2022-01-31 23:19:10,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [982247288] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:10,443 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:10,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:19:10,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260443149] [2022-01-31 23:19:10,444 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:10,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:19:10,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:10,444 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:19:10,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:19:10,444 INFO L87 Difference]: Start difference. First operand 551 states and 645 transitions. Second operand has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:16,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:16,955 INFO L93 Difference]: Finished difference Result 643 states and 756 transitions. [2022-01-31 23:19:16,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:19:16,955 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 182 [2022-01-31 23:19:16,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:16,956 INFO L225 Difference]: With dead ends: 643 [2022-01-31 23:19:16,956 INFO L226 Difference]: Without dead ends: 641 [2022-01-31 23:19:16,957 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=485, Invalid=10021, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 23:19:16,957 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 145 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7985 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 8172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 7985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:16,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 253 Invalid, 8172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 7985 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 23:19:16,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-31 23:19:17,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 553. [2022-01-31 23:19:17,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 418 states have (on average 1.0215311004784688) internal successors, (427), 425 states have internal predecessors, (427), 111 states have call successors, (111), 24 states have call predecessors, (111), 23 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 23:19:17,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 648 transitions. [2022-01-31 23:19:17,636 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 648 transitions. Word has length 182 [2022-01-31 23:19:17,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:17,636 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 648 transitions. [2022-01-31 23:19:17,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:17,637 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 648 transitions. [2022-01-31 23:19:17,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 23:19:17,638 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:17,638 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:17,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 23:19:17,638 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:17,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:17,638 INFO L85 PathProgramCache]: Analyzing trace with hash 109479813, now seen corresponding path program 101 times [2022-01-31 23:19:17,638 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:17,638 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1429756862] [2022-01-31 23:19:17,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:17,638 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:17,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:17,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,826 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:18,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:18,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:18,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:19:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:19:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:19:18,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:19:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:19:18,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:19:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:19:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:19:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:19:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:19:18,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:19:18,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:19:18,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:19:18,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:19:18,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:19:18,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:19:18,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:19:18,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:18,856 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:18,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:18,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1429756862] [2022-01-31 23:19:18,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1429756862] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:18,856 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:18,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:19:18,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521130702] [2022-01-31 23:19:18,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:18,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:19:18,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:18,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:19:18,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:19:18,857 INFO L87 Difference]: Start difference. First operand 553 states and 648 transitions. Second operand has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:23,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:23,568 INFO L93 Difference]: Finished difference Result 581 states and 680 transitions. [2022-01-31 23:19:23,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:19:23,568 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 184 [2022-01-31 23:19:23,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:23,569 INFO L225 Difference]: With dead ends: 581 [2022-01-31 23:19:23,569 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 23:19:23,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=462, Invalid=8658, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 23:19:23,570 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 111 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5906 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 6068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 5906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:23,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 220 Invalid, 6068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 5906 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:19:23,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 23:19:24,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 498. [2022-01-31 23:19:24,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 377 states have (on average 1.023872679045093) internal successors, (386), 383 states have internal predecessors, (386), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-31 23:19:24,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 579 transitions. [2022-01-31 23:19:24,159 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 579 transitions. Word has length 184 [2022-01-31 23:19:24,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:24,160 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 579 transitions. [2022-01-31 23:19:24,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:24,160 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 579 transitions. [2022-01-31 23:19:24,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 23:19:24,161 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:24,161 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:24,161 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 23:19:24,161 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:24,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:24,161 INFO L85 PathProgramCache]: Analyzing trace with hash -961095747, now seen corresponding path program 102 times [2022-01-31 23:19:24,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:24,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588842467] [2022-01-31 23:19:24,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:24,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:24,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:24,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:24,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 23:19:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:19:24,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:19:24,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:19:24,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:19:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:19:24,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:19:24,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:19:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:19:24,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:19:24,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:19:24,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:19:24,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:19:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:19:24,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:19:24,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:19:24,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:19:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:19:24,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:24,482 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:24,482 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:24,482 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588842467] [2022-01-31 23:19:24,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588842467] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:24,483 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:24,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 23:19:24,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65382770] [2022-01-31 23:19:24,483 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:24,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 23:19:24,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:24,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 23:19:24,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 23:19:24,483 INFO L87 Difference]: Start difference. First operand 498 states and 579 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:19:25,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:25,691 INFO L93 Difference]: Finished difference Result 519 states and 602 transitions. [2022-01-31 23:19:25,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 23:19:25,691 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 186 [2022-01-31 23:19:25,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:25,692 INFO L225 Difference]: With dead ends: 519 [2022-01-31 23:19:25,692 INFO L226 Difference]: Without dead ends: 435 [2022-01-31 23:19:25,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=796, Invalid=2986, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 23:19:25,693 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 189 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:25,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 86 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 23:19:25,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-31 23:19:26,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-01-31 23:19:26,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 330 states have (on average 1.0242424242424242) internal successors, (338), 335 states have internal predecessors, (338), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 23:19:26,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 499 transitions. [2022-01-31 23:19:26,185 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 499 transitions. Word has length 186 [2022-01-31 23:19:26,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:26,186 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 499 transitions. [2022-01-31 23:19:26,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:19:26,186 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 499 transitions. [2022-01-31 23:19:26,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 23:19:26,187 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:26,187 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:26,187 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 23:19:26,187 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:26,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:26,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1209654571, now seen corresponding path program 103 times [2022-01-31 23:19:26,187 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:26,187 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767946384] [2022-01-31 23:19:26,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:26,187 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:26,190 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:26,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:27,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:27,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:27,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:19:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:19:27,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:19:27,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:19:27,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:19:27,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:19:27,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:19:27,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:19:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:19:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:19:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:19:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:19:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:19:27,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:19:27,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:19:27,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:19:27,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:27,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:27,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:27,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767946384] [2022-01-31 23:19:27,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767946384] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:27,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:27,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:19:27,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035285803] [2022-01-31 23:19:27,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:27,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:19:27,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:27,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:19:27,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:19:27,282 INFO L87 Difference]: Start difference. First operand 435 states and 499 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:32,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:32,697 INFO L93 Difference]: Finished difference Result 549 states and 637 transitions. [2022-01-31 23:19:32,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:19:32,697 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 184 [2022-01-31 23:19:32,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:32,698 INFO L225 Difference]: With dead ends: 549 [2022-01-31 23:19:32,698 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 23:19:32,699 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=516, Invalid=9990, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 23:19:32,699 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 152 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 8390 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 8597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 8390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:32,699 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 260 Invalid, 8597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 8390 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:19:32,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 23:19:33,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 437. [2022-01-31 23:19:33,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 332 states have (on average 1.0271084337349397) internal successors, (341), 337 states have internal predecessors, (341), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 23:19:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 502 transitions. [2022-01-31 23:19:33,201 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 502 transitions. Word has length 184 [2022-01-31 23:19:33,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:33,201 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 502 transitions. [2022-01-31 23:19:33,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:33,202 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 502 transitions. [2022-01-31 23:19:33,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 23:19:33,202 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:33,202 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:33,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 23:19:33,203 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:33,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:33,203 INFO L85 PathProgramCache]: Analyzing trace with hash -1568331933, now seen corresponding path program 104 times [2022-01-31 23:19:33,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:33,203 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059374220] [2022-01-31 23:19:33,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:33,203 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:33,206 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:33,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:34,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:34,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:19:34,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:19:34,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:19:34,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:19:34,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:19:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:19:34,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:19:34,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:19:34,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:19:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:19:34,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:19:34,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:19:34,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:19:34,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:19:34,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:19:34,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:19:34,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:19:34,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:34,417 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:34,417 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059374220] [2022-01-31 23:19:34,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059374220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:34,417 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:34,417 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:19:34,417 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536661991] [2022-01-31 23:19:34,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:34,418 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:19:34,418 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:34,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:19:34,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:19:34,418 INFO L87 Difference]: Start difference. First operand 437 states and 502 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:39,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:39,443 INFO L93 Difference]: Finished difference Result 470 states and 540 transitions. [2022-01-31 23:19:39,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:19:39,444 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 186 [2022-01-31 23:19:39,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:39,445 INFO L225 Difference]: With dead ends: 470 [2022-01-31 23:19:39,445 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 23:19:39,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=481, Invalid=9221, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:19:39,446 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 119 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6903 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:39,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 238 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6903 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:19:39,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 23:19:39,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 441. [2022-01-31 23:19:39,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 335 states have (on average 1.026865671641791) internal successors, (344), 340 states have internal predecessors, (344), 82 states have call successors, (82), 24 states have call predecessors, (82), 23 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 23:19:39,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 507 transitions. [2022-01-31 23:19:39,967 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 507 transitions. Word has length 186 [2022-01-31 23:19:39,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:39,967 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 507 transitions. [2022-01-31 23:19:39,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:39,967 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 507 transitions. [2022-01-31 23:19:39,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 23:19:39,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:39,968 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:39,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 23:19:39,968 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:39,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:39,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1569519643, now seen corresponding path program 105 times [2022-01-31 23:19:39,968 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:39,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560064670] [2022-01-31 23:19:39,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:39,969 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:39,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:39,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:41,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:41,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:41,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:19:41,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:19:41,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:19:41,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:19:41,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:19:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:19:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:19:41,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:19:41,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:19:41,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:19:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:19:41,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:19:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:19:41,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:19:41,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:19:41,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:19:41,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:19:41,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:19:41,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:41,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:41,312 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:41,312 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560064670] [2022-01-31 23:19:41,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560064670] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:41,312 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:41,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:19:41,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499144936] [2022-01-31 23:19:41,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:41,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:19:41,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:41,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:19:41,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:19:41,313 INFO L87 Difference]: Start difference. First operand 441 states and 507 transitions. Second operand has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:19:45,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:45,222 INFO L93 Difference]: Finished difference Result 469 states and 539 transitions. [2022-01-31 23:19:45,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 23:19:45,223 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 188 [2022-01-31 23:19:45,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:45,224 INFO L225 Difference]: With dead ends: 469 [2022-01-31 23:19:45,224 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 23:19:45,224 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=389, Invalid=7093, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 23:19:45,225 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:45,225 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 196 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4448 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 23:19:45,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 23:19:45,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 437. [2022-01-31 23:19:45,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 332 states have (on average 1.0271084337349397) internal successors, (341), 337 states have internal predecessors, (341), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 23:19:45,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 502 transitions. [2022-01-31 23:19:45,734 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 502 transitions. Word has length 188 [2022-01-31 23:19:45,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:45,734 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 502 transitions. [2022-01-31 23:19:45,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:19:45,734 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 502 transitions. [2022-01-31 23:19:45,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 23:19:45,735 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:45,735 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:45,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 23:19:45,735 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:45,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:45,735 INFO L85 PathProgramCache]: Analyzing trace with hash -468157175, now seen corresponding path program 106 times [2022-01-31 23:19:45,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:45,736 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1336460047] [2022-01-31 23:19:45,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:45,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:45,739 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:45,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:46,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:46,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:19:46,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:19:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:19:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:19:46,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:19:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:19:46,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:19:46,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:19:46,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:19:46,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:19:46,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:19:46,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:19:46,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:19:46,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:19:46,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:19:46,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,821 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:19:46,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:46,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:46,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:46,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1336460047] [2022-01-31 23:19:46,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1336460047] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:46,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:46,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:19:46,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892524167] [2022-01-31 23:19:46,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:46,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:19:46,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:46,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:19:46,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:19:46,824 INFO L87 Difference]: Start difference. First operand 437 states and 502 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:51,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:51,893 INFO L93 Difference]: Finished difference Result 493 states and 567 transitions. [2022-01-31 23:19:51,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:19:51,893 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 186 [2022-01-31 23:19:51,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:51,894 INFO L225 Difference]: With dead ends: 493 [2022-01-31 23:19:51,894 INFO L226 Difference]: Without dead ends: 491 [2022-01-31 23:19:51,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=425, Invalid=9081, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 23:19:51,895 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 166 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8768 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 8978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 8768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:51,895 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 265 Invalid, 8978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 8768 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 23:19:51,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-31 23:19:52,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 368. [2022-01-31 23:19:52,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 279 states have (on average 1.021505376344086) internal successors, (285), 283 states have internal predecessors, (285), 65 states have call successors, (65), 24 states have call predecessors, (65), 23 states have return successors, (64), 60 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 23:19:52,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 414 transitions. [2022-01-31 23:19:52,304 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 414 transitions. Word has length 186 [2022-01-31 23:19:52,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:19:52,304 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 414 transitions. [2022-01-31 23:19:52,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 23:19:52,304 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 414 transitions. [2022-01-31 23:19:52,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 23:19:52,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:19:52,305 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:19:52,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 23:19:52,305 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:19:52,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:19:52,305 INFO L85 PathProgramCache]: Analyzing trace with hash 962283457, now seen corresponding path program 107 times [2022-01-31 23:19:52,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:19:52,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1501489368] [2022-01-31 23:19:52,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:19:52,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:19:52,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:19:52,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:53,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:19:53,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:53,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:19:53,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:53,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:19:54,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:19:54,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:19:54,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:19:54,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:19:54,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:19:54,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:19:54,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:19:54,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:19:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:19:54,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:19:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:19:54,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:19:54,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:19:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:19:54,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:19:54,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:19:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:19:54,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:19:54,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:19:54,035 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:19:54,035 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1501489368] [2022-01-31 23:19:54,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1501489368] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:19:54,035 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:19:54,036 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:19:54,036 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743330567] [2022-01-31 23:19:54,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:19:54,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:19:54,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:19:54,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:19:54,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1635, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:19:54,036 INFO L87 Difference]: Start difference. First operand 368 states and 414 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:19:59,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:19:59,742 INFO L93 Difference]: Finished difference Result 455 states and 520 transitions. [2022-01-31 23:19:59,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:19:59,743 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 188 [2022-01-31 23:19:59,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:19:59,743 INFO L225 Difference]: With dead ends: 455 [2022-01-31 23:19:59,744 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 23:19:59,744 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=460, Invalid=8852, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 23:19:59,744 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 7366 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 7366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:19:59,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 245 Invalid, 7548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 7366 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:19:59,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 23:20:00,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2022-01-31 23:20:00,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 337 states have (on average 1.0207715133531157) internal successors, (344), 342 states have internal predecessors, (344), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:20:00,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 509 transitions. [2022-01-31 23:20:00,272 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 509 transitions. Word has length 188 [2022-01-31 23:20:00,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:00,272 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 509 transitions. [2022-01-31 23:20:00,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:00,272 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 509 transitions. [2022-01-31 23:20:00,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 23:20:00,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:00,273 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:00,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 23:20:00,273 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:00,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:00,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1755547399, now seen corresponding path program 108 times [2022-01-31 23:20:00,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:00,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173670618] [2022-01-31 23:20:00,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:00,274 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:00,277 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:01,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:20:01,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:20:01,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:20:01,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:20:01,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:20:01,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:20:01,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:20:01,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:20:01,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:20:01,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:20:01,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:20:01,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:20:01,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:20:01,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:20:01,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:20:01,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:20:01,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:20:01,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:20:01,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:01,601 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:01,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:01,602 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173670618] [2022-01-31 23:20:01,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173670618] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:01,602 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:01,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:20:01,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582403601] [2022-01-31 23:20:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:01,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:20:01,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:01,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:20:01,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:20:01,603 INFO L87 Difference]: Start difference. First operand 445 states and 509 transitions. Second operand has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:06,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:06,287 INFO L93 Difference]: Finished difference Result 532 states and 615 transitions. [2022-01-31 23:20:06,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:20:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 190 [2022-01-31 23:20:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:06,289 INFO L225 Difference]: With dead ends: 532 [2022-01-31 23:20:06,289 INFO L226 Difference]: Without dead ends: 530 [2022-01-31 23:20:06,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=435, Invalid=8121, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:20:06,289 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 94 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 5887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:06,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 219 Invalid, 5887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:20:06,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-31 23:20:06,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 504. [2022-01-31 23:20:06,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 381 states have (on average 1.0183727034120735) internal successors, (388), 387 states have internal predecessors, (388), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 23:20:06,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 583 transitions. [2022-01-31 23:20:06,921 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 583 transitions. Word has length 190 [2022-01-31 23:20:06,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:06,921 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 583 transitions. [2022-01-31 23:20:06,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:06,921 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 583 transitions. [2022-01-31 23:20:06,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 23:20:06,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:06,922 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:06,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 23:20:06,922 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:06,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:06,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1932183711, now seen corresponding path program 109 times [2022-01-31 23:20:06,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:06,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588768756] [2022-01-31 23:20:06,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:06,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:06,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:06,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,068 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:08,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:08,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:08,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,071 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:20:08,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:20:08,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:20:08,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:20:08,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:20:08,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:20:08,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:20:08,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:20:08,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:20:08,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:20:08,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:20:08,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:20:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:20:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:20:08,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:20:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:20:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:20:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:08,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:08,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:08,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588768756] [2022-01-31 23:20:08,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [588768756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:08,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:08,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:20:08,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222291452] [2022-01-31 23:20:08,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:08,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:20:08,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:08,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:20:08,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:20:08,101 INFO L87 Difference]: Start difference. First operand 504 states and 583 transitions. Second operand has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:13,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:13,727 INFO L93 Difference]: Finished difference Result 592 states and 690 transitions. [2022-01-31 23:20:13,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 23:20:13,728 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 190 [2022-01-31 23:20:13,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:13,729 INFO L225 Difference]: With dead ends: 592 [2022-01-31 23:20:13,729 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 23:20:13,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=526, Invalid=10604, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 23:20:13,730 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 139 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8056 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 8255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 8056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:13,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 255 Invalid, 8255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 8056 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:20:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 23:20:14,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 506. [2022-01-31 23:20:14,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 383 states have (on average 1.0208877284595301) internal successors, (391), 389 states have internal predecessors, (391), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 23:20:14,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 586 transitions. [2022-01-31 23:20:14,366 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 586 transitions. Word has length 190 [2022-01-31 23:20:14,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:14,366 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 586 transitions. [2022-01-31 23:20:14,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:14,366 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 586 transitions. [2022-01-31 23:20:14,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 23:20:14,367 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:14,367 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:14,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 23:20:14,367 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:14,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:14,367 INFO L85 PathProgramCache]: Analyzing trace with hash -1689306537, now seen corresponding path program 110 times [2022-01-31 23:20:14,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:14,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [694867028] [2022-01-31 23:20:14,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:14,368 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:14,371 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:14,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,831 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:15,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:15,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:20:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:20:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:20:15,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:20:15,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:20:15,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:20:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:20:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:20:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:20:15,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:20:15,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:20:15,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:20:15,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:20:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:20:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:20:15,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:20:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:20:15,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:20:15,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:15,858 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:15,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:15,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [694867028] [2022-01-31 23:20:15,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [694867028] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:15,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:15,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:20:15,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082229406] [2022-01-31 23:20:15,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:15,858 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:20:15,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:15,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:20:15,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:20:15,859 INFO L87 Difference]: Start difference. First operand 506 states and 586 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:21,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:21,467 INFO L93 Difference]: Finished difference Result 534 states and 618 transitions. [2022-01-31 23:20:21,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 23:20:21,468 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 192 [2022-01-31 23:20:21,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:21,469 INFO L225 Difference]: With dead ends: 534 [2022-01-31 23:20:21,469 INFO L226 Difference]: Without dead ends: 532 [2022-01-31 23:20:21,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=426, Invalid=8504, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 23:20:21,469 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 6420 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 6564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:21,469 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 230 Invalid, 6564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6420 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:20:21,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-31 23:20:22,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 447. [2022-01-31 23:20:22,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 339 states have (on average 1.0235988200589972) internal successors, (347), 344 states have internal predecessors, (347), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:20:22,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 512 transitions. [2022-01-31 23:20:22,011 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 512 transitions. Word has length 192 [2022-01-31 23:20:22,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:22,012 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 512 transitions. [2022-01-31 23:20:22,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:22,012 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 512 transitions. [2022-01-31 23:20:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 23:20:22,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:22,013 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:22,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 23:20:22,013 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:22,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:22,013 INFO L85 PathProgramCache]: Analyzing trace with hash 1998424573, now seen corresponding path program 111 times [2022-01-31 23:20:22,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:22,013 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765774265] [2022-01-31 23:20:22,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:22,013 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:22,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:22,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:23,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:20:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:20:23,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:20:23,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:20:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:20:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:20:23,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:20:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:20:23,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:20:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:20:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:20:23,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:20:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:20:23,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:20:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:20:23,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:20:23,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:20:23,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:23,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:23,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:23,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765774265] [2022-01-31 23:20:23,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [765774265] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:23,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:23,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:20:23,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114726959] [2022-01-31 23:20:23,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:23,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:20:23,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:23,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:20:23,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:20:23,231 INFO L87 Difference]: Start difference. First operand 447 states and 512 transitions. Second operand has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:29,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:29,121 INFO L93 Difference]: Finished difference Result 553 states and 640 transitions. [2022-01-31 23:20:29,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 23:20:29,122 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 192 [2022-01-31 23:20:29,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:29,123 INFO L225 Difference]: With dead ends: 553 [2022-01-31 23:20:29,123 INFO L226 Difference]: Without dead ends: 551 [2022-01-31 23:20:29,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=552, Invalid=11438, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:20:29,124 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 151 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8577 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 8791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 8577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:29,124 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 262 Invalid, 8791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 8577 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 23:20:29,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-31 23:20:29,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 449. [2022-01-31 23:20:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 341 states have (on average 1.0263929618768328) internal successors, (350), 346 states have internal predecessors, (350), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:20:29,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 515 transitions. [2022-01-31 23:20:29,673 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 515 transitions. Word has length 192 [2022-01-31 23:20:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:29,673 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 515 transitions. [2022-01-31 23:20:29,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:29,673 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 515 transitions. [2022-01-31 23:20:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 23:20:29,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:29,674 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:29,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 23:20:29,674 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:29,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:29,674 INFO L85 PathProgramCache]: Analyzing trace with hash 1838619701, now seen corresponding path program 112 times [2022-01-31 23:20:29,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:29,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1891290724] [2022-01-31 23:20:29,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:29,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:29,678 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:30,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:30,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:30,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:20:30,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:20:30,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:20:30,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:20:30,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:20:30,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:20:30,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:20:30,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:20:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:20:30,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:20:30,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:20:30,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:20:30,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:20:30,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:20:30,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:20:30,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:20:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:20:30,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:20:30,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:30,968 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:30,968 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1891290724] [2022-01-31 23:20:30,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1891290724] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:30,968 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:30,968 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:20:30,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463972068] [2022-01-31 23:20:30,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:30,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:20:30,969 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:30,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:20:30,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:20:30,969 INFO L87 Difference]: Start difference. First operand 449 states and 515 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:36,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:36,159 INFO L93 Difference]: Finished difference Result 486 states and 558 transitions. [2022-01-31 23:20:36,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 23:20:36,160 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 194 [2022-01-31 23:20:36,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:36,161 INFO L225 Difference]: With dead ends: 486 [2022-01-31 23:20:36,161 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 23:20:36,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=487, Invalid=9613, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 23:20:36,162 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 117 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 6862 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:36,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 237 Invalid, 7035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6862 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:20:36,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 23:20:36,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 453. [2022-01-31 23:20:36,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 344 states have (on average 1.0261627906976745) internal successors, (353), 349 states have internal predecessors, (353), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 23:20:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 520 transitions. [2022-01-31 23:20:36,715 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 520 transitions. Word has length 194 [2022-01-31 23:20:36,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:36,716 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 520 transitions. [2022-01-31 23:20:36,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 520 transitions. [2022-01-31 23:20:36,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 23:20:36,717 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:36,717 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:36,717 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 23:20:36,717 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:36,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:36,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1560196333, now seen corresponding path program 113 times [2022-01-31 23:20:36,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:36,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [382690854] [2022-01-31 23:20:36,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:36,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:36,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:38,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:38,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:20:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:20:38,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:20:38,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:20:38,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:20:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:20:38,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:20:38,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:20:38,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:20:38,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:20:38,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:20:38,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:20:38,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:20:38,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:20:38,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:20:38,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:20:38,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:20:38,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:20:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:20:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:38,180 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:38,180 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [382690854] [2022-01-31 23:20:38,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [382690854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:38,180 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:38,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 23:20:38,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257556668] [2022-01-31 23:20:38,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:38,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 23:20:38,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:38,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 23:20:38,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 23:20:38,181 INFO L87 Difference]: Start difference. First operand 453 states and 520 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:20:42,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:42,478 INFO L93 Difference]: Finished difference Result 485 states and 557 transitions. [2022-01-31 23:20:42,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 23:20:42,479 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 196 [2022-01-31 23:20:42,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:42,480 INFO L225 Difference]: With dead ends: 485 [2022-01-31 23:20:42,480 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 23:20:42,480 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=395, Invalid=7437, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 23:20:42,480 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 101 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 5034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:42,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 205 Invalid, 5034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 23:20:42,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 23:20:43,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 449. [2022-01-31 23:20:43,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 341 states have (on average 1.0263929618768328) internal successors, (350), 346 states have internal predecessors, (350), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:20:43,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 515 transitions. [2022-01-31 23:20:43,030 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 515 transitions. Word has length 196 [2022-01-31 23:20:43,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:43,030 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 515 transitions. [2022-01-31 23:20:43,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:20:43,030 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 515 transitions. [2022-01-31 23:20:43,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 23:20:43,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:43,031 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:43,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 23:20:43,031 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:43,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:43,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1231383515, now seen corresponding path program 114 times [2022-01-31 23:20:43,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:43,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934396985] [2022-01-31 23:20:43,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:43,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:43,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:43,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:44,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:44,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:20:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:20:44,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:20:44,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:20:44,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:20:44,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:20:44,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:20:44,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:20:44,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:20:44,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:20:44,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:20:44,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:20:44,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:20:44,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:20:44,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:20:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:20:44,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:20:44,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:44,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:44,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:44,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934396985] [2022-01-31 23:20:44,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [934396985] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:44,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:44,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:20:44,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102691138] [2022-01-31 23:20:44,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:44,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:20:44,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:44,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:20:44,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:20:44,229 INFO L87 Difference]: Start difference. First operand 449 states and 515 transitions. Second operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:50,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:50,425 INFO L93 Difference]: Finished difference Result 574 states and 667 transitions. [2022-01-31 23:20:50,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:20:50,425 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 194 [2022-01-31 23:20:50,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:50,426 INFO L225 Difference]: With dead ends: 574 [2022-01-31 23:20:50,426 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 23:20:50,427 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=541, Invalid=11015, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:20:50,427 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 9832 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 10052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 9832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:50,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 282 Invalid, 10052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 9832 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 23:20:50,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 23:20:50,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 451. [2022-01-31 23:20:50,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 343 states have (on average 1.0291545189504374) internal successors, (353), 348 states have internal predecessors, (353), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 23:20:50,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 518 transitions. [2022-01-31 23:20:50,983 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 518 transitions. Word has length 194 [2022-01-31 23:20:50,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:50,983 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 518 transitions. [2022-01-31 23:20:50,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:20:50,983 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 518 transitions. [2022-01-31 23:20:50,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 23:20:50,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:50,984 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:50,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 23:20:50,984 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:50,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:50,984 INFO L85 PathProgramCache]: Analyzing trace with hash -848429421, now seen corresponding path program 115 times [2022-01-31 23:20:50,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:50,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765198433] [2022-01-31 23:20:50,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:50,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:50,992 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:51,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:20:52,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:20:52,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:20:52,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:20:52,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:20:52,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:20:52,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:20:52,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:20:52,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:20:52,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:20:52,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:20:52,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:20:52,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:20:52,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:20:52,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,530 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:20:52,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:20:52,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:20:52,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:20:52,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:20:52,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:20:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:20:52,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:20:52,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:20:52,540 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:20:52,540 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765198433] [2022-01-31 23:20:52,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765198433] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:20:52,540 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:20:52,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:20:52,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148165776] [2022-01-31 23:20:52,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:20:52,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:20:52,540 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:20:52,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:20:52,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:20:52,541 INFO L87 Difference]: Start difference. First operand 451 states and 518 transitions. Second operand has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:58,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:20:58,707 INFO L93 Difference]: Finished difference Result 539 states and 625 transitions. [2022-01-31 23:20:58,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 23:20:58,707 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 196 [2022-01-31 23:20:58,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:20:58,709 INFO L225 Difference]: With dead ends: 539 [2022-01-31 23:20:58,709 INFO L226 Difference]: Without dead ends: 537 [2022-01-31 23:20:58,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=467, Invalid=9835, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 23:20:58,709 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7590 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 7757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:20:58,710 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 248 Invalid, 7757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7590 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 23:20:58,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-31 23:20:59,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 530. [2022-01-31 23:20:59,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 23:20:59,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 23:20:59,415 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 196 [2022-01-31 23:20:59,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:20:59,415 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 23:20:59,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:20:59,415 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 23:20:59,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 23:20:59,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:20:59,416 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:20:59,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 23:20:59,416 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:20:59,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:20:59,417 INFO L85 PathProgramCache]: Analyzing trace with hash 581334987, now seen corresponding path program 116 times [2022-01-31 23:20:59,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:20:59,417 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [889771745] [2022-01-31 23:20:59,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:20:59,417 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:20:59,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:20:59,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:00,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:00,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:00,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:21:00,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:21:00,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:21:00,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:21:00,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:21:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:21:00,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:21:00,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:21:00,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:21:00,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:21:00,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:21:00,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:21:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:21:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:21:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:21:00,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:21:00,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:21:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:21:00,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:21:00,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:00,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:00,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:00,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [889771745] [2022-01-31 23:21:00,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [889771745] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:00,726 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:00,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 23:21:00,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866946054] [2022-01-31 23:21:00,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:00,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 23:21:00,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:00,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 23:21:00,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 23:21:00,727 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:05,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:05,533 INFO L93 Difference]: Finished difference Result 621 states and 726 transitions. [2022-01-31 23:21:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 23:21:05,534 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 198 [2022-01-31 23:21:05,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:05,535 INFO L225 Difference]: With dead ends: 621 [2022-01-31 23:21:05,535 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 23:21:05,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=441, Invalid=8489, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 23:21:05,536 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 92 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5551 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 5694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:05,536 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 214 Invalid, 5694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5551 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 23:21:05,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 23:21:06,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 589. [2022-01-31 23:21:06,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 446 states have (on average 1.0224215246636772) internal successors, (456), 453 states have internal predecessors, (456), 117 states have call successors, (117), 26 states have call predecessors, (117), 25 states have return successors, (116), 109 states have call predecessors, (116), 116 states have call successors, (116) [2022-01-31 23:21:06,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 689 transitions. [2022-01-31 23:21:06,341 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 689 transitions. Word has length 198 [2022-01-31 23:21:06,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:06,342 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 689 transitions. [2022-01-31 23:21:06,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:06,342 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 689 transitions. [2022-01-31 23:21:06,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 23:21:06,343 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:06,343 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:06,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 23:21:06,343 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:06,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:06,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1455665607, now seen corresponding path program 117 times [2022-01-31 23:21:06,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:06,343 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [935402859] [2022-01-31 23:21:06,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:06,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:06,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:06,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:07,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,840 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:07,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:21:07,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,842 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:21:07,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:21:07,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:21:07,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,846 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:21:07,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:21:07,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:21:07,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:21:07,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:21:07,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:21:07,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:21:07,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:21:07,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:21:07,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:21:07,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:21:07,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:21:07,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:21:07,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:07,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:07,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:07,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [935402859] [2022-01-31 23:21:07,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [935402859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:07,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:07,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:21:07,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136545030] [2022-01-31 23:21:07,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:07,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:21:07,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:07,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:21:07,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1887, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:21:07,865 INFO L87 Difference]: Start difference. First operand 589 states and 689 transitions. Second operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:21:14,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:14,497 INFO L93 Difference]: Finished difference Result 739 states and 872 transitions. [2022-01-31 23:21:14,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 23:21:14,497 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 196 [2022-01-31 23:21:14,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:14,498 INFO L225 Difference]: With dead ends: 739 [2022-01-31 23:21:14,499 INFO L226 Difference]: Without dead ends: 737 [2022-01-31 23:21:14,499 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=7262, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 23:21:14,499 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 168 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10166 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 10354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 10166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:14,499 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 286 Invalid, 10354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 10166 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 23:21:14,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-31 23:21:15,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 658. [2022-01-31 23:21:15,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 498 states have (on average 1.0220883534136547) internal successors, (509), 506 states have internal predecessors, (509), 134 states have call successors, (134), 26 states have call predecessors, (134), 25 states have return successors, (133), 125 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 23:21:15,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 776 transitions. [2022-01-31 23:21:15,401 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 776 transitions. Word has length 196 [2022-01-31 23:21:15,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:15,401 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 776 transitions. [2022-01-31 23:21:15,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:21:15,401 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 776 transitions. [2022-01-31 23:21:15,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 23:21:15,403 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:15,403 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:15,403 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 23:21:15,403 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:15,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:15,403 INFO L85 PathProgramCache]: Analyzing trace with hash -1827290767, now seen corresponding path program 118 times [2022-01-31 23:21:15,403 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:15,403 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [802513665] [2022-01-31 23:21:15,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:15,403 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:15,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:15,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:16,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:16,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:21:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:21:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:21:16,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:21:16,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:21:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:21:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:21:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:21:16,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:21:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:21:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:21:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:21:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:21:16,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:21:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:21:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:21:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:21:16,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:21:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:16,720 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:16,720 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [802513665] [2022-01-31 23:21:16,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [802513665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:16,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:16,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:21:16,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932702983] [2022-01-31 23:21:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:16,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:21:16,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:21:16,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:21:16,721 INFO L87 Difference]: Start difference. First operand 658 states and 776 transitions. Second operand has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:21:22,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:22,973 INFO L93 Difference]: Finished difference Result 745 states and 882 transitions. [2022-01-31 23:21:22,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:21:22,973 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 198 [2022-01-31 23:21:22,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:22,975 INFO L225 Difference]: With dead ends: 745 [2022-01-31 23:21:22,975 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 23:21:22,976 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=532, Invalid=11024, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:21:22,976 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 136 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8267 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 8464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 8267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:22,976 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 258 Invalid, 8464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 8267 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 23:21:22,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 23:21:23,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 658. [2022-01-31 23:21:23,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 498 states have (on average 1.0220883534136547) internal successors, (509), 506 states have internal predecessors, (509), 134 states have call successors, (134), 26 states have call predecessors, (134), 25 states have return successors, (133), 125 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 23:21:23,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 776 transitions. [2022-01-31 23:21:23,890 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 776 transitions. Word has length 198 [2022-01-31 23:21:23,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:23,890 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 776 transitions. [2022-01-31 23:21:23,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:21:23,891 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 776 transitions. [2022-01-31 23:21:23,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 23:21:23,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:23,892 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:23,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 23:21:23,892 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:23,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:23,892 INFO L85 PathProgramCache]: Analyzing trace with hash 493419305, now seen corresponding path program 119 times [2022-01-31 23:21:23,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:23,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [922306246] [2022-01-31 23:21:23,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:23,893 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:23,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:23,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:25,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:25,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:21:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:21:25,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:21:25,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:21:25,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:21:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:21:25,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:21:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:21:25,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:21:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:21:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:21:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:21:25,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:21:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:21:25,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:21:25,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:21:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:21:25,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:21:25,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:21:25,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:25,494 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:25,494 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:25,495 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [922306246] [2022-01-31 23:21:25,495 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [922306246] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:25,495 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:25,495 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:21:25,495 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250765832] [2022-01-31 23:21:25,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:25,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:21:25,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:25,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:21:25,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:21:25,495 INFO L87 Difference]: Start difference. First operand 658 states and 776 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:31,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:31,428 INFO L93 Difference]: Finished difference Result 690 states and 813 transitions. [2022-01-31 23:21:31,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 23:21:31,428 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 200 [2022-01-31 23:21:31,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:31,429 INFO L225 Difference]: With dead ends: 690 [2022-01-31 23:21:31,429 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 23:21:31,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=432, Invalid=8880, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 23:21:31,430 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6546 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 6690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:31,430 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 233 Invalid, 6690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6546 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 23:21:31,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 23:21:32,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 599. [2022-01-31 23:21:32,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 454 states have (on average 1.024229074889868) internal successors, (465), 461 states have internal predecessors, (465), 119 states have call successors, (119), 26 states have call predecessors, (119), 25 states have return successors, (118), 111 states have call predecessors, (118), 118 states have call successors, (118) [2022-01-31 23:21:32,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 702 transitions. [2022-01-31 23:21:32,259 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 702 transitions. Word has length 200 [2022-01-31 23:21:32,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:32,260 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 702 transitions. [2022-01-31 23:21:32,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:32,260 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 702 transitions. [2022-01-31 23:21:32,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 23:21:32,261 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:32,261 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:32,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 23:21:32,261 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:32,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:32,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1860440343, now seen corresponding path program 120 times [2022-01-31 23:21:32,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:32,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821579002] [2022-01-31 23:21:32,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:32,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:32,265 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:33,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:33,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:21:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:21:33,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:21:33,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:21:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:21:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:21:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:21:33,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:21:33,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:21:33,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:21:33,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:21:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:21:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:21:33,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:21:33,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:21:33,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:21:33,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:21:33,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:33,654 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:33,654 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:33,654 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821579002] [2022-01-31 23:21:33,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [821579002] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:33,654 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:33,654 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:21:33,654 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495284035] [2022-01-31 23:21:33,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:33,654 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:21:33,654 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:33,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:21:33,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:21:33,655 INFO L87 Difference]: Start difference. First operand 599 states and 702 transitions. Second operand has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:21:40,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:40,368 INFO L93 Difference]: Finished difference Result 689 states and 807 transitions. [2022-01-31 23:21:40,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 23:21:40,368 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 198 [2022-01-31 23:21:40,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:40,370 INFO L225 Difference]: With dead ends: 689 [2022-01-31 23:21:40,370 INFO L226 Difference]: Without dead ends: 687 [2022-01-31 23:21:40,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=473, Invalid=12409, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 23:21:40,371 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 179 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 10146 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 10361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:40,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 282 Invalid, 10361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10146 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 23:21:40,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-31 23:21:41,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 530. [2022-01-31 23:21:41,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 23:21:41,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 23:21:41,122 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 198 [2022-01-31 23:21:41,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:41,123 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 23:21:41,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 23:21:41,123 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 23:21:41,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 23:21:41,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:41,124 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:41,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 23:21:41,124 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:41,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:41,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1915206449, now seen corresponding path program 121 times [2022-01-31 23:21:41,124 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:41,124 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [186169767] [2022-01-31 23:21:41,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:41,125 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:41,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:41,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:42,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:21:42,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:21:42,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:21:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:21:42,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:21:42,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:21:42,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:21:42,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:21:42,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:21:42,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:21:42,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:21:42,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:21:42,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:21:42,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:21:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:21:42,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:21:42,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:21:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:21:42,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:42,408 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:42,408 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:42,408 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [186169767] [2022-01-31 23:21:42,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [186169767] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:42,408 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:42,408 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:21:42,408 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038907465] [2022-01-31 23:21:42,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:42,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:21:42,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:42,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:21:42,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:21:42,409 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:21:48,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:48,887 INFO L93 Difference]: Finished difference Result 627 states and 732 transitions. [2022-01-31 23:21:48,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 23:21:48,887 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 200 [2022-01-31 23:21:48,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:48,889 INFO L225 Difference]: With dead ends: 627 [2022-01-31 23:21:48,889 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 23:21:48,889 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=558, Invalid=11874, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 23:21:48,890 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 148 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9228 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 9439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 9228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:48,890 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 273 Invalid, 9439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 9228 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 23:21:48,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 23:21:49,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 530. [2022-01-31 23:21:49,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 23:21:49,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 23:21:49,612 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 200 [2022-01-31 23:21:49,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:49,612 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 23:21:49,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:21:49,612 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 23:21:49,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 23:21:49,613 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:49,613 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:49,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 23:21:49,614 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:49,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:49,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1905794823, now seen corresponding path program 122 times [2022-01-31 23:21:49,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:49,614 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146019452] [2022-01-31 23:21:49,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:49,614 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:49,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:21:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:21:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:21:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:21:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:21:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:21:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:21:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:21:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:21:51,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:21:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:21:51,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:21:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:21:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:21:51,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:21:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:21:51,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:21:51,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:21:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:21:51,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:51,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:51,396 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:51,396 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146019452] [2022-01-31 23:21:51,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146019452] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:51,396 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:51,396 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:21:51,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585436302] [2022-01-31 23:21:51,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:51,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:21:51,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:51,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:21:51,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1717, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:21:51,397 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:57,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:21:57,856 INFO L93 Difference]: Finished difference Result 571 states and 663 transitions. [2022-01-31 23:21:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:21:57,857 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 202 [2022-01-31 23:21:57,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:21:57,858 INFO L225 Difference]: With dead ends: 571 [2022-01-31 23:21:57,858 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 23:21:57,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=460, Invalid=9242, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 23:21:57,859 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 7396 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 7563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:21:57,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 248 Invalid, 7563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7396 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 23:21:57,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 23:21:58,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 534. [2022-01-31 23:21:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 411 states have internal predecessors, (415), 103 states have call successors, (103), 26 states have call predecessors, (103), 25 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 23:21:58,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 620 transitions. [2022-01-31 23:21:58,611 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 620 transitions. Word has length 202 [2022-01-31 23:21:58,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:21:58,611 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 620 transitions. [2022-01-31 23:21:58,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:21:58,611 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 620 transitions. [2022-01-31 23:21:58,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 23:21:58,612 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:21:58,612 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:21:58,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 23:21:58,613 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:21:58,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:21:58,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1024950207, now seen corresponding path program 123 times [2022-01-31 23:21:58,613 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:21:58,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1078568649] [2022-01-31 23:21:58,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:21:58,613 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:21:58,618 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:21:58,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:21:58,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:21:58,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:21:58,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 23:21:58,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:21:58,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:21:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:21:58,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:21:58,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:21:58,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:21:58,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:21:58,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:21:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:21:58,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:21:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:21:58,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:21:58,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:21:58,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:21:58,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:21:58,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:21:58,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:21:58,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:21:58,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:21:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:21:58,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:21:58,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:21:58,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1078568649] [2022-01-31 23:21:58,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1078568649] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:21:58,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:21:58,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 23:21:58,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249530953] [2022-01-31 23:21:58,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:21:58,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 23:21:58,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:21:58,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 23:21:58,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 23:21:58,996 INFO L87 Difference]: Start difference. First operand 534 states and 620 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:00,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:00,504 INFO L93 Difference]: Finished difference Result 567 states and 658 transitions. [2022-01-31 23:22:00,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 23:22:00,504 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 204 [2022-01-31 23:22:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:00,505 INFO L225 Difference]: With dead ends: 567 [2022-01-31 23:22:00,505 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 23:22:00,506 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=952, Invalid=3604, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 23:22:00,506 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 209 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:00,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 100 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:22:00,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 23:22:01,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-01-31 23:22:01,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 361 states have (on average 1.0249307479224377) internal successors, (370), 366 states have internal predecessors, (370), 88 states have call successors, (88), 26 states have call predecessors, (88), 25 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-01-31 23:22:01,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 545 transitions. [2022-01-31 23:22:01,153 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 545 transitions. Word has length 204 [2022-01-31 23:22:01,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:01,153 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 545 transitions. [2022-01-31 23:22:01,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:01,153 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 545 transitions. [2022-01-31 23:22:01,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 23:22:01,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:01,154 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:01,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 23:22:01,154 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:01,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:01,155 INFO L85 PathProgramCache]: Analyzing trace with hash -502830931, now seen corresponding path program 124 times [2022-01-31 23:22:01,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:01,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307403756] [2022-01-31 23:22:01,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:01,155 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:01,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:01,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:02,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,734 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:22:02,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:22:02,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:22:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:22:02,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:22:02,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:22:02,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:22:02,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:22:02,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:22:02,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:22:02,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:22:02,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:22:02,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:22:02,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:22:02,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:22:02,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:22:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:22:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:22:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:02,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:02,759 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:02,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307403756] [2022-01-31 23:22:02,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307403756] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:02,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:02,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:22:02,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552053418] [2022-01-31 23:22:02,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:02,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:22:02,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:02,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:22:02,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:22:02,761 INFO L87 Difference]: Start difference. First operand 475 states and 545 transitions. Second operand has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:22:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:10,198 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2022-01-31 23:22:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 23:22:10,199 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 202 [2022-01-31 23:22:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:10,200 INFO L225 Difference]: With dead ends: 509 [2022-01-31 23:22:10,200 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 23:22:10,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=524, Invalid=11032, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:22:10,201 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 10072 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 10287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:10,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 284 Invalid, 10287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10072 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 23:22:10,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 23:22:10,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 404. [2022-01-31 23:22:10,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 308 states have (on average 1.0292207792207793) internal successors, (317), 312 states have internal predecessors, (317), 70 states have call successors, (70), 26 states have call predecessors, (70), 25 states have return successors, (69), 65 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 23:22:10,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 456 transitions. [2022-01-31 23:22:10,735 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 456 transitions. Word has length 202 [2022-01-31 23:22:10,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:10,735 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 456 transitions. [2022-01-31 23:22:10,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:22:10,735 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 456 transitions. [2022-01-31 23:22:10,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 23:22:10,736 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:10,736 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:10,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 23:22:10,737 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:10,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:10,737 INFO L85 PathProgramCache]: Analyzing trace with hash 1989002085, now seen corresponding path program 125 times [2022-01-31 23:22:10,737 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:10,737 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1247302723] [2022-01-31 23:22:10,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:10,737 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:10,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:12,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:12,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:22:12,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:22:12,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:22:12,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:22:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:22:12,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:22:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:22:12,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:22:12,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:22:12,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:22:12,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:22:12,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:22:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:22:12,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:22:12,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:22:12,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:22:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:22:12,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:22:12,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:22:12,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:12,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:12,501 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:12,501 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1247302723] [2022-01-31 23:22:12,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1247302723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:12,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:12,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:22:12,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556432352] [2022-01-31 23:22:12,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:12,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:22:12,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:12,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:22:12,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1801, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:22:12,502 INFO L87 Difference]: Start difference. First operand 404 states and 456 transitions. Second operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:22:18,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:18,741 INFO L93 Difference]: Finished difference Result 496 states and 568 transitions. [2022-01-31 23:22:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 23:22:18,741 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 204 [2022-01-31 23:22:18,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:18,742 INFO L225 Difference]: With dead ends: 496 [2022-01-31 23:22:18,742 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 23:22:18,743 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=479, Invalid=9823, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 23:22:18,744 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 124 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7679 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 7858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 7679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:18,744 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 250 Invalid, 7858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 7679 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 23:22:18,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 23:22:19,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 487. [2022-01-31 23:22:19,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 23:22:19,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 23:22:19,416 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 204 [2022-01-31 23:22:19,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:19,416 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 23:22:19,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:22:19,416 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 23:22:19,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 23:22:19,417 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:19,417 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:19,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 23:22:19,418 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:19,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:19,418 INFO L85 PathProgramCache]: Analyzing trace with hash -617249635, now seen corresponding path program 126 times [2022-01-31 23:22:19,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:19,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778500074] [2022-01-31 23:22:19,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:19,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:19,422 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:19,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:21,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:21,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:22:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:22:21,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:22:21,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:22:21,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:22:21,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:22:21,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:22:21,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:22:21,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:22:21,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:22:21,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:22:21,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:22:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:22:21,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:22:21,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:22:21,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:22:21,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:22:21,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:22:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:22:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:22:21,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:21,454 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:21,454 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778500074] [2022-01-31 23:22:21,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1778500074] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:21,454 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:21,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 23:22:21,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11795993] [2022-01-31 23:22:21,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:21,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 23:22:21,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:21,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 23:22:21,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 23:22:21,455 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:26,910 INFO L93 Difference]: Finished difference Result 582 states and 674 transitions. [2022-01-31 23:22:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 23:22:26,911 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 206 [2022-01-31 23:22:26,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:26,912 INFO L225 Difference]: With dead ends: 582 [2022-01-31 23:22:26,912 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 23:22:26,912 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=406, Invalid=8150, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 23:22:26,913 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 112 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 5704 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:26,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 224 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5704 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 23:22:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 23:22:27,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 546. [2022-01-31 23:22:27,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 414 states have (on average 1.0217391304347827) internal successors, (423), 420 states have internal predecessors, (423), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (104), 98 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 23:22:27,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 632 transitions. [2022-01-31 23:22:27,683 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 632 transitions. Word has length 206 [2022-01-31 23:22:27,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:27,683 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 632 transitions. [2022-01-31 23:22:27,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:27,684 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 632 transitions. [2022-01-31 23:22:27,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 23:22:27,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:27,685 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:27,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 23:22:27,685 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:27,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:27,685 INFO L85 PathProgramCache]: Analyzing trace with hash -419623669, now seen corresponding path program 127 times [2022-01-31 23:22:27,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:27,685 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680569894] [2022-01-31 23:22:27,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:27,685 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:27,689 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:28,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:28,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:28,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:22:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:22:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:22:28,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:22:28,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:22:28,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:22:28,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:22:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:22:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:22:28,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:22:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:22:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:22:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:22:28,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:22:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:22:28,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:22:28,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:22:28,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:22:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:28,978 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:28,978 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:28,978 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680569894] [2022-01-31 23:22:28,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680569894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:28,978 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:28,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:22:28,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600598824] [2022-01-31 23:22:28,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:28,979 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:22:28,979 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:28,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:22:28,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:22:28,979 INFO L87 Difference]: Start difference. First operand 546 states and 632 transitions. Second operand has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:22:35,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:35,842 INFO L93 Difference]: Finished difference Result 678 states and 793 transitions. [2022-01-31 23:22:35,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 23:22:35,843 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 204 [2022-01-31 23:22:35,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:35,844 INFO L225 Difference]: With dead ends: 678 [2022-01-31 23:22:35,844 INFO L226 Difference]: Without dead ends: 676 [2022-01-31 23:22:35,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=566, Invalid=12090, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 23:22:35,845 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 168 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10348 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 10579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 10348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:35,845 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 287 Invalid, 10579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 10348 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 23:22:35,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-31 23:22:36,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 615. [2022-01-31 23:22:36,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 466 states have (on average 1.0214592274678111) internal successors, (476), 473 states have internal predecessors, (476), 122 states have call successors, (122), 27 states have call predecessors, (122), 26 states have return successors, (121), 114 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 23:22:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 719 transitions. [2022-01-31 23:22:36,739 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 719 transitions. Word has length 204 [2022-01-31 23:22:36,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:36,739 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 719 transitions. [2022-01-31 23:22:36,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:22:36,740 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 719 transitions. [2022-01-31 23:22:36,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 23:22:36,741 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:36,741 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:36,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 23:22:36,741 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:36,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:36,741 INFO L85 PathProgramCache]: Analyzing trace with hash 346802243, now seen corresponding path program 128 times [2022-01-31 23:22:36,741 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:36,741 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404020628] [2022-01-31 23:22:36,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:36,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:36,745 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:36,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:38,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:38,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:22:38,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:22:38,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:22:38,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:22:38,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:22:38,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:22:38,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:22:38,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:22:38,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:22:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:22:38,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:22:38,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:22:38,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:22:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:22:38,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:22:38,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:22:38,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:22:38,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:22:38,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:22:38,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:38,110 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:38,110 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404020628] [2022-01-31 23:22:38,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [404020628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:38,110 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:38,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:22:38,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297772694] [2022-01-31 23:22:38,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:38,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:22:38,111 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:38,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:22:38,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:22:38,111 INFO L87 Difference]: Start difference. First operand 615 states and 719 transitions. Second operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:22:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:44,841 INFO L93 Difference]: Finished difference Result 706 states and 830 transitions. [2022-01-31 23:22:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:22:44,842 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 206 [2022-01-31 23:22:44,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:44,843 INFO L225 Difference]: With dead ends: 706 [2022-01-31 23:22:44,843 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 23:22:44,844 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=531, Invalid=11241, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 23:22:44,844 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 130 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8843 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 9035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 8843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:44,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 269 Invalid, 9035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 8843 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 23:22:44,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 23:22:45,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 615. [2022-01-31 23:22:45,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 466 states have (on average 1.0214592274678111) internal successors, (476), 473 states have internal predecessors, (476), 122 states have call successors, (122), 27 states have call predecessors, (122), 26 states have return successors, (121), 114 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 23:22:45,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 719 transitions. [2022-01-31 23:22:45,740 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 719 transitions. Word has length 206 [2022-01-31 23:22:45,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:45,740 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 719 transitions. [2022-01-31 23:22:45,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:22:45,740 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 719 transitions. [2022-01-31 23:22:45,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 23:22:45,742 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:45,742 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:45,742 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 23:22:45,742 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:45,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1776667131, now seen corresponding path program 129 times [2022-01-31 23:22:45,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:45,742 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669561944] [2022-01-31 23:22:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:45,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:45,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:45,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:47,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:22:47,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:22:47,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:22:47,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:22:47,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:22:47,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:22:47,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:22:47,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:22:47,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:22:47,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:22:47,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:22:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:22:47,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:22:47,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:22:47,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:22:47,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:22:47,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:22:47,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:22:47,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:22:47,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 23:22:47,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:47,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:47,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:47,189 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669561944] [2022-01-31 23:22:47,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669561944] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:47,189 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:47,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:22:47,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53642811] [2022-01-31 23:22:47,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:47,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:22:47,189 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:47,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:22:47,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:22:47,190 INFO L87 Difference]: Start difference. First operand 615 states and 719 transitions. Second operand has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:22:52,601 INFO L93 Difference]: Finished difference Result 651 states and 761 transitions. [2022-01-31 23:22:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 23:22:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 208 [2022-01-31 23:22:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:22:52,602 INFO L225 Difference]: With dead ends: 651 [2022-01-31 23:22:52,602 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 23:22:52,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=466, Invalid=9434, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 23:22:52,603 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 98 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 6611 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 6764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 6611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:22:52,603 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 235 Invalid, 6764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 6611 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 23:22:52,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 23:22:53,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 556. [2022-01-31 23:22:53,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 422 states have (on average 1.0236966824644549) internal successors, (432), 428 states have internal predecessors, (432), 107 states have call successors, (107), 27 states have call predecessors, (107), 26 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 23:22:53,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 645 transitions. [2022-01-31 23:22:53,394 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 645 transitions. Word has length 208 [2022-01-31 23:22:53,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:22:53,394 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 645 transitions. [2022-01-31 23:22:53,394 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:22:53,395 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 645 transitions. [2022-01-31 23:22:53,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 23:22:53,396 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:22:53,396 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:22:53,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 23:22:53,396 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:22:53,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:22:53,396 INFO L85 PathProgramCache]: Analyzing trace with hash -2061823511, now seen corresponding path program 130 times [2022-01-31 23:22:53,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:22:53,396 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1670983382] [2022-01-31 23:22:53,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:22:53,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:22:53,400 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:22:53,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:22:54,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:22:54,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:22:54,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:22:54,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:22:54,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:22:54,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:22:54,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:22:54,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:22:54,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:22:54,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:22:54,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:22:54,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:22:54,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:22:54,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:22:54,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:22:54,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:22:54,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:22:54,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:22:54,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:22:54,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:22:54,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:22:54,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:22:54,776 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:22:54,776 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1670983382] [2022-01-31 23:22:54,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1670983382] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:22:54,777 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:22:54,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:22:54,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073266330] [2022-01-31 23:22:54,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:22:54,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:22:54,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:22:54,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:22:54,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:22:54,778 INFO L87 Difference]: Start difference. First operand 556 states and 645 transitions. Second operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:23:01,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:01,321 INFO L93 Difference]: Finished difference Result 636 states and 740 transitions. [2022-01-31 23:23:01,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 23:23:01,322 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 206 [2022-01-31 23:23:01,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:01,323 INFO L225 Difference]: With dead ends: 636 [2022-01-31 23:23:01,323 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 23:23:01,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=427, Invalid=11129, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 23:23:01,324 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 184 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 10862 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 11075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 10862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:01,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 292 Invalid, 11075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 10862 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-01-31 23:23:01,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 23:23:02,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 487. [2022-01-31 23:23:02,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 23:23:02,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 23:23:02,002 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 206 [2022-01-31 23:23:02,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:02,002 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 23:23:02,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 23:23:02,003 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 23:23:02,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 23:23:02,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:02,004 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:02,004 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 23:23:02,004 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:02,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:02,004 INFO L85 PathProgramCache]: Analyzing trace with hash -1554248287, now seen corresponding path program 131 times [2022-01-31 23:23:02,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:02,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440554886] [2022-01-31 23:23:02,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:02,004 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:02,008 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:03,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:23:03,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:23:03,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:23:03,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:23:03,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:23:03,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:23:03,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:23:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:23:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:23:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:23:03,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:23:03,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:23:03,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:23:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:23:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:23:03,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:23:03,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:23:03,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:23:03,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 23:23:03,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:03,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:03,765 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:03,765 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440554886] [2022-01-31 23:23:03,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [440554886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:03,765 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:03,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:23:03,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569365569] [2022-01-31 23:23:03,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:03,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:23:03,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:03,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:23:03,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:23:03,766 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:10,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:10,999 INFO L93 Difference]: Finished difference Result 580 states and 671 transitions. [2022-01-31 23:23:10,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 23:23:10,999 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 208 [2022-01-31 23:23:10,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:11,000 INFO L225 Difference]: With dead ends: 580 [2022-01-31 23:23:11,001 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 23:23:11,001 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=525, Invalid=11247, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 23:23:11,001 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 141 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 9204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:11,001 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 272 Invalid, 9405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9204 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 23:23:11,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 23:23:11,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 487. [2022-01-31 23:23:11,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 23:23:11,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 23:23:11,697 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 208 [2022-01-31 23:23:11,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:11,697 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 23:23:11,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:11,697 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 23:23:11,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 23:23:11,698 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:11,698 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:11,698 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 23:23:11,698 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:11,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:11,698 INFO L85 PathProgramCache]: Analyzing trace with hash 228208601, now seen corresponding path program 132 times [2022-01-31 23:23:11,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:11,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1058206716] [2022-01-31 23:23:11,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:11,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:11,702 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:11,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:13,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:13,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:23:13,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:23:13,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:23:13,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:23:13,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:23:13,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:23:13,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:23:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:23:13,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:23:13,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:23:13,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:23:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:23:13,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:23:13,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:23:13,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:23:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:23:13,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:23:13,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:23:13,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:23:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 23:23:13,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:13,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:13,249 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:13,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1058206716] [2022-01-31 23:23:13,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1058206716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:13,249 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:13,249 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:23:13,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788177498] [2022-01-31 23:23:13,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:13,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:23:13,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:13,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:23:13,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:23:13,250 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:23:18,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:18,939 INFO L93 Difference]: Finished difference Result 528 states and 606 transitions. [2022-01-31 23:23:18,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 23:23:18,939 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 210 [2022-01-31 23:23:18,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:18,940 INFO L225 Difference]: With dead ends: 528 [2022-01-31 23:23:18,940 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 23:23:18,941 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=492, Invalid=10220, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 23:23:18,941 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 109 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7176 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:18,941 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 242 Invalid, 7344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7176 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:23:18,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 23:23:19,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 487. [2022-01-31 23:23:19,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 23:23:19,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 23:23:19,627 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 210 [2022-01-31 23:23:19,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:19,627 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 23:23:19,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:23:19,628 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 23:23:19,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 23:23:19,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:19,629 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:19,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 23:23:19,629 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:19,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:19,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1192260479, now seen corresponding path program 133 times [2022-01-31 23:23:19,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:19,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452042335] [2022-01-31 23:23:19,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:19,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:19,633 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:19,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:21,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:21,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:23:21,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:23:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,283 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:23:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:23:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:23:21,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:23:21,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:23:21,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:23:21,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:23:21,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:23:21,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:23:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:23:21,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:23:21,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:23:21,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:23:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:23:21,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:23:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:23:21,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 23:23:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:21,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:21,306 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:21,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452042335] [2022-01-31 23:23:21,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452042335] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:21,306 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:21,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 23:23:21,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118949996] [2022-01-31 23:23:21,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:21,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 23:23:21,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 23:23:21,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:23:21,307 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:29,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:29,022 INFO L93 Difference]: Finished difference Result 517 states and 591 transitions. [2022-01-31 23:23:29,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:23:29,022 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 210 [2022-01-31 23:23:29,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:29,023 INFO L225 Difference]: With dead ends: 517 [2022-01-31 23:23:29,023 INFO L226 Difference]: Without dead ends: 515 [2022-01-31 23:23:29,024 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=537, Invalid=11673, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 23:23:29,024 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 153 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 10481 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 10695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 10481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:29,024 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 291 Invalid, 10695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 10481 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-01-31 23:23:29,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-31 23:23:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 412. [2022-01-31 23:23:29,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 314 states have (on average 1.0286624203821657) internal successors, (323), 318 states have internal predecessors, (323), 71 states have call successors, (71), 27 states have call predecessors, (71), 26 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-31 23:23:29,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 464 transitions. [2022-01-31 23:23:29,591 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 464 transitions. Word has length 210 [2022-01-31 23:23:29,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:29,591 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 464 transitions. [2022-01-31 23:23:29,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:29,591 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 464 transitions. [2022-01-31 23:23:29,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 23:23:29,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:29,592 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:29,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 23:23:29,592 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:29,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:29,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1781754313, now seen corresponding path program 134 times [2022-01-31 23:23:29,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:29,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1819156628] [2022-01-31 23:23:29,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:29,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:29,597 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:29,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:31,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:31,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:31,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:23:31,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:23:31,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:23:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:23:31,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:23:31,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:23:31,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:23:31,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:23:31,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:23:31,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:23:31,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:23:31,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:23:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:23:31,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:23:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:23:31,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:23:31,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:23:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:23:31,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:23:31,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 23:23:31,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:31,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:31,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:31,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1819156628] [2022-01-31 23:23:31,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1819156628] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:31,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:31,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:23:31,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645533053] [2022-01-31 23:23:31,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:31,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:23:31,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:31,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:23:31,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:23:31,310 INFO L87 Difference]: Start difference. First operand 412 states and 464 transitions. Second operand has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:23:37,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:37,993 INFO L93 Difference]: Finished difference Result 508 states and 581 transitions. [2022-01-31 23:23:37,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:23:37,994 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 212 [2022-01-31 23:23:37,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:37,995 INFO L225 Difference]: With dead ends: 508 [2022-01-31 23:23:37,995 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 23:23:37,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=479, Invalid=10651, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 23:23:37,996 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 121 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 7723 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 7891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:37,996 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 249 Invalid, 7891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7723 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 23:23:37,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 23:23:38,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-01-31 23:23:38,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 379 states have (on average 1.0237467018469657) internal successors, (388), 384 states have internal predecessors, (388), 92 states have call successors, (92), 28 states have call predecessors, (92), 27 states have return successors, (91), 86 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 23:23:38,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 571 transitions. [2022-01-31 23:23:38,710 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 571 transitions. Word has length 212 [2022-01-31 23:23:38,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:38,710 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 571 transitions. [2022-01-31 23:23:38,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:23:38,710 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 571 transitions. [2022-01-31 23:23:38,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 23:23:38,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:38,711 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:38,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 23:23:38,711 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:38,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:38,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1780195183, now seen corresponding path program 135 times [2022-01-31 23:23:38,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:38,712 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094672890] [2022-01-31 23:23:38,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:38,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:38,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:38,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:40,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:23:40,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:23:40,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:23:40,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:23:40,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:23:40,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:23:40,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,795 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:23:40,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:23:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:23:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:23:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:23:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:23:40,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:23:40,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:23:40,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:23:40,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:23:40,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:23:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:23:40,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:23:40,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:23:40,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 23:23:40,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:40,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:40,814 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:40,814 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094672890] [2022-01-31 23:23:40,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094672890] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:40,814 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:40,815 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 23:23:40,815 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524409509] [2022-01-31 23:23:40,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:40,815 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 23:23:40,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:40,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 23:23:40,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 23:23:40,815 INFO L87 Difference]: Start difference. First operand 499 states and 571 transitions. Second operand has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:23:46,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:46,144 INFO L93 Difference]: Finished difference Result 598 states and 692 transitions. [2022-01-31 23:23:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 23:23:46,144 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 214 [2022-01-31 23:23:46,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:46,145 INFO L225 Difference]: With dead ends: 598 [2022-01-31 23:23:46,145 INFO L226 Difference]: Without dead ends: 596 [2022-01-31 23:23:46,146 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=431, Invalid=8689, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 23:23:46,146 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 110 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 5745 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:46,146 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 221 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5745 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 23:23:46,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-31 23:23:46,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 558. [2022-01-31 23:23:46,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 423 states have (on average 1.0212765957446808) internal successors, (432), 429 states have internal predecessors, (432), 107 states have call successors, (107), 28 states have call predecessors, (107), 27 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 23:23:46,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 645 transitions. [2022-01-31 23:23:46,973 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 645 transitions. Word has length 214 [2022-01-31 23:23:46,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:46,973 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 645 transitions. [2022-01-31 23:23:46,973 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:23:46,973 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 645 transitions. [2022-01-31 23:23:46,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 23:23:46,974 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:46,974 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:46,975 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 23:23:46,975 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:46,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:46,975 INFO L85 PathProgramCache]: Analyzing trace with hash -817702435, now seen corresponding path program 136 times [2022-01-31 23:23:46,975 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:46,975 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852600568] [2022-01-31 23:23:46,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:46,975 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:46,979 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,324 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:48,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:23:48,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:23:48,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:23:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:23:48,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,330 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:23:48,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,331 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:23:48,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:23:48,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,334 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:23:48,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,335 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:23:48,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:23:48,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:23:48,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:23:48,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:23:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:23:48,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:23:48,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:23:48,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:23:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:23:48,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 23:23:48,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:48,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:48,350 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:48,350 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852600568] [2022-01-31 23:23:48,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [852600568] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:48,350 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:48,350 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:23:48,350 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325015299] [2022-01-31 23:23:48,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:48,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:23:48,350 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:48,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:23:48,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:23:48,351 INFO L87 Difference]: Start difference. First operand 558 states and 645 transitions. Second operand has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:55,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:23:55,615 INFO L93 Difference]: Finished difference Result 686 states and 801 transitions. [2022-01-31 23:23:55,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 23:23:55,615 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 212 [2022-01-31 23:23:55,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:23:55,616 INFO L225 Difference]: With dead ends: 686 [2022-01-31 23:23:55,617 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 23:23:55,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=609, Invalid=13911, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 23:23:55,617 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 167 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 10646 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 10885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 10646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 23:23:55,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 289 Invalid, 10885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 10646 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 23:23:55,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 23:23:56,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 627. [2022-01-31 23:23:56,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 475 states have (on average 1.0210526315789474) internal successors, (485), 482 states have internal predecessors, (485), 124 states have call successors, (124), 28 states have call predecessors, (124), 27 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 23:23:56,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 732 transitions. [2022-01-31 23:23:56,557 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 732 transitions. Word has length 212 [2022-01-31 23:23:56,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:23:56,557 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 732 transitions. [2022-01-31 23:23:56,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:23:56,558 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 732 transitions. [2022-01-31 23:23:56,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 23:23:56,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:23:56,559 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:23:56,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 23:23:56,559 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:23:56,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:23:56,559 INFO L85 PathProgramCache]: Analyzing trace with hash -620831467, now seen corresponding path program 137 times [2022-01-31 23:23:56,559 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:23:56,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592345974] [2022-01-31 23:23:56,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:23:56,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:23:56,563 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:23:56,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:23:58,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:23:58,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:23:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:23:58,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:23:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:23:58,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:23:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:23:58,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:23:58,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:23:58,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:23:58,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:23:58,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:23:58,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:23:58,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:23:58,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:23:58,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:23:58,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:23:58,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:23:58,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:23:58,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:23:58,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:23:58,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,328 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 23:23:58,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:23:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:23:58,330 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:23:58,330 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592345974] [2022-01-31 23:23:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592345974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:23:58,331 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:23:58,331 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:23:58,331 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410305951] [2022-01-31 23:23:58,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:23:58,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:23:58,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:23:58,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:23:58,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:23:58,331 INFO L87 Difference]: Start difference. First operand 627 states and 732 transitions. Second operand has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:24:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:05,779 INFO L93 Difference]: Finished difference Result 722 states and 848 transitions. [2022-01-31 23:24:05,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:24:05,779 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 214 [2022-01-31 23:24:05,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:05,781 INFO L225 Difference]: With dead ends: 722 [2022-01-31 23:24:05,781 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 23:24:05,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=503, Invalid=11487, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:24:05,782 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 132 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 8665 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 8845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 8665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:05,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 264 Invalid, 8845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 8665 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 23:24:05,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 23:24:06,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 627. [2022-01-31 23:24:06,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 475 states have (on average 1.0210526315789474) internal successors, (485), 482 states have internal predecessors, (485), 124 states have call successors, (124), 28 states have call predecessors, (124), 27 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 23:24:06,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 732 transitions. [2022-01-31 23:24:06,723 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 732 transitions. Word has length 214 [2022-01-31 23:24:06,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:06,724 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 732 transitions. [2022-01-31 23:24:06,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:24:06,724 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 732 transitions. [2022-01-31 23:24:06,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 23:24:06,725 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:06,725 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:06,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 23:24:06,725 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:06,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:06,725 INFO L85 PathProgramCache]: Analyzing trace with hash 735553229, now seen corresponding path program 138 times [2022-01-31 23:24:06,725 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:06,725 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1004853169] [2022-01-31 23:24:06,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:06,726 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:06,730 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:08,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:08,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 23:24:08,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:24:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:24:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:24:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:24:08,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:24:08,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:24:08,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:24:08,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:24:08,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:24:08,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:24:08,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:24:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:24:08,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:24:08,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:24:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:24:08,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:24:08,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:24:08,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:24:08,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 23:24:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 23:24:08,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:08,546 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:08,546 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1004853169] [2022-01-31 23:24:08,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1004853169] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:08,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:08,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 23:24:08,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407020963] [2022-01-31 23:24:08,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:08,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 23:24:08,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 23:24:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 23:24:08,547 INFO L87 Difference]: Start difference. First operand 627 states and 732 transitions. Second operand has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:24:14,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:14,527 INFO L93 Difference]: Finished difference Result 667 states and 779 transitions. [2022-01-31 23:24:14,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 23:24:14,527 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 216 [2022-01-31 23:24:14,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:14,529 INFO L225 Difference]: With dead ends: 667 [2022-01-31 23:24:14,529 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 23:24:14,529 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=454, Invalid=9446, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 23:24:14,530 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 95 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 6711 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 6859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 6711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:14,530 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 6859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 6711 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 23:24:14,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 23:24:15,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 568. [2022-01-31 23:24:15,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 431 states have (on average 1.023201856148492) internal successors, (441), 437 states have internal predecessors, (441), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:24:15,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 658 transitions. [2022-01-31 23:24:15,381 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 658 transitions. Word has length 216 [2022-01-31 23:24:15,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:15,381 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 658 transitions. [2022-01-31 23:24:15,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:24:15,382 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 658 transitions. [2022-01-31 23:24:15,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 23:24:15,383 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:15,383 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:15,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 23:24:15,383 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:15,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:15,383 INFO L85 PathProgramCache]: Analyzing trace with hash 343220411, now seen corresponding path program 139 times [2022-01-31 23:24:15,383 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:15,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [349589221] [2022-01-31 23:24:15,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:15,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:15,387 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:15,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:16,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:16,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:16,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:24:16,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:24:16,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:24:16,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:24:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:24:16,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:24:16,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:24:16,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:24:16,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:24:16,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:24:16,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:24:16,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:24:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:24:16,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:24:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:24:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:24:16,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:24:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:24:16,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 23:24:16,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:16,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:16,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:16,730 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [349589221] [2022-01-31 23:24:16,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [349589221] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:16,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:16,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:24:16,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482019015] [2022-01-31 23:24:16,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:16,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:24:16,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:16,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:24:16,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:24:16,730 INFO L87 Difference]: Start difference. First operand 568 states and 658 transitions. Second operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:24:24,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:24,206 INFO L93 Difference]: Finished difference Result 725 states and 849 transitions. [2022-01-31 23:24:24,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 23:24:24,207 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 214 [2022-01-31 23:24:24,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:24,208 INFO L225 Difference]: With dead ends: 725 [2022-01-31 23:24:24,208 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 23:24:24,209 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=591, Invalid=13215, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 23:24:24,209 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 177 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 11532 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 11775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 11532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:24,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 301 Invalid, 11775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 11532 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 23:24:24,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 23:24:25,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 570. [2022-01-31 23:24:25,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:24:25,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 23:24:25,065 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 214 [2022-01-31 23:24:25,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:25,065 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 23:24:25,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:24:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 23:24:25,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 23:24:25,066 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:25,066 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:25,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 23:24:25,066 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:25,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:25,067 INFO L85 PathProgramCache]: Analyzing trace with hash -1665473421, now seen corresponding path program 140 times [2022-01-31 23:24:25,067 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:25,067 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1368945011] [2022-01-31 23:24:25,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:25,067 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:25,071 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:26,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:26,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,529 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 23:24:26,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,531 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:24:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,532 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:24:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:24:26,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,534 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:24:26,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:24:26,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:24:26,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:24:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:24:26,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:24:26,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:24:26,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:24:26,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:24:26,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:24:26,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:24:26,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:24:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:24:26,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:24:26,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 23:24:26,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 23:24:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:26,555 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:26,555 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:26,555 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1368945011] [2022-01-31 23:24:26,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1368945011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:26,555 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:26,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 23:24:26,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709090353] [2022-01-31 23:24:26,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:26,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 23:24:26,556 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:26,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 23:24:26,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 23:24:26,556 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:24:33,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:33,328 INFO L93 Difference]: Finished difference Result 667 states and 779 transitions. [2022-01-31 23:24:33,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 23:24:33,329 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 216 [2022-01-31 23:24:33,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:33,330 INFO L225 Difference]: With dead ends: 667 [2022-01-31 23:24:33,330 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 23:24:33,331 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=563, Invalid=12547, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 23:24:33,331 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 139 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 9193 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 9399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 9193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:33,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 270 Invalid, 9399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 9193 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 23:24:33,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 23:24:34,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 570. [2022-01-31 23:24:34,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:24:34,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 23:24:34,187 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 216 [2022-01-31 23:24:34,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:34,187 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 23:24:34,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:24:34,187 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 23:24:34,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 23:24:34,188 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:34,188 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:34,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 23:24:34,189 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:34,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:34,189 INFO L85 PathProgramCache]: Analyzing trace with hash 1856982699, now seen corresponding path program 141 times [2022-01-31 23:24:34,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:34,189 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374667237] [2022-01-31 23:24:34,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:34,189 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:34,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:35,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:35,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 23:24:35,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:24:35,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:24:35,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:24:35,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:24:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,662 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:24:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:24:35,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:24:35,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:24:35,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:24:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:24:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:24:35,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:24:35,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:24:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:24:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:24:35,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:24:35,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:24:35,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:24:35,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 23:24:35,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 23:24:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:35,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:35,683 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:35,683 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374667237] [2022-01-31 23:24:35,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [374667237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:35,683 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:35,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 23:24:35,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480856403] [2022-01-31 23:24:35,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:35,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 23:24:35,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:35,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 23:24:35,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 23:24:35,684 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:24:41,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:41,585 INFO L93 Difference]: Finished difference Result 615 states and 714 transitions. [2022-01-31 23:24:41,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 23:24:41,585 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 218 [2022-01-31 23:24:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:41,586 INFO L225 Difference]: With dead ends: 615 [2022-01-31 23:24:41,586 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 23:24:41,587 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=498, Invalid=10632, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 23:24:41,587 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:41,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 245 Invalid, 7593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 23:24:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 23:24:42,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 570. [2022-01-31 23:24:42,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 23:24:42,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 23:24:42,447 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 218 [2022-01-31 23:24:42,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:42,447 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 23:24:42,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:24:42,447 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 23:24:42,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 23:24:42,448 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:42,448 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:42,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 23:24:42,448 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:42,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:42,449 INFO L85 PathProgramCache]: Analyzing trace with hash -701421543, now seen corresponding path program 142 times [2022-01-31 23:24:42,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:42,449 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517030111] [2022-01-31 23:24:42,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:42,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:42,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:42,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:43,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,706 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:43,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 23:24:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 23:24:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 23:24:43,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,712 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 23:24:43,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 23:24:43,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 23:24:43,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 23:24:43,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 23:24:43,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 23:24:43,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 23:24:43,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 23:24:43,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 23:24:43,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 23:24:43,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 23:24:43,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 23:24:43,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 23:24:43,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 23:24:43,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 23:24:43,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 23:24:43,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:43,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:43,732 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:43,732 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517030111] [2022-01-31 23:24:43,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517030111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:43,732 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:43,732 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:24:43,732 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475404610] [2022-01-31 23:24:43,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:43,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:24:43,733 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:43,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:24:43,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:24:43,733 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:24:50,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:24:50,712 INFO L93 Difference]: Finished difference Result 643 states and 747 transitions. [2022-01-31 23:24:50,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 23:24:50,712 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 216 [2022-01-31 23:24:50,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:24:50,714 INFO L225 Difference]: With dead ends: 643 [2022-01-31 23:24:50,714 INFO L226 Difference]: Without dead ends: 641 [2022-01-31 23:24:50,714 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=447, Invalid=12209, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 23:24:50,714 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 194 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12268 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 12492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 12268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-01-31 23:24:50,714 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 310 Invalid, 12492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 12268 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-01-31 23:24:50,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-31 23:24:51,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 499. [2022-01-31 23:24:51,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 379 states have (on average 1.0237467018469657) internal successors, (388), 384 states have internal predecessors, (388), 92 states have call successors, (92), 28 states have call predecessors, (92), 27 states have return successors, (91), 86 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 23:24:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 571 transitions. [2022-01-31 23:24:51,459 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 571 transitions. Word has length 216 [2022-01-31 23:24:51,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:24:51,459 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 571 transitions. [2022-01-31 23:24:51,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 23:24:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 571 transitions. [2022-01-31 23:24:51,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 23:24:51,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:24:51,461 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:24:51,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 23:24:51,461 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:24:51,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:24:51,461 INFO L85 PathProgramCache]: Analyzing trace with hash -544043951, now seen corresponding path program 143 times [2022-01-31 23:24:51,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:24:51,461 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [846553508] [2022-01-31 23:24:51,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:24:51,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:24:51,465 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:24:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:24:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:24:52,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:24:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 23:24:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 23:24:52,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 23:24:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 23:24:52,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 23:24:52,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 23:24:52,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 23:24:52,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 23:24:52,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 23:24:52,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 23:24:52,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 23:24:52,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 23:24:52,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 23:24:52,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 23:24:52,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 23:24:52,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 23:24:52,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 23:24:52,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 23:24:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 23:24:52,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 23:24:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:24:52,995 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:24:52,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:24:52,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [846553508] [2022-01-31 23:24:52,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [846553508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:24:52,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:24:52,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 23:24:52,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360588125] [2022-01-31 23:24:52,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:24:52,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 23:24:52,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:24:52,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 23:24:52,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 23:24:52,997 INFO L87 Difference]: Start difference. First operand 499 states and 571 transitions. Second operand has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:25:00,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:00,099 INFO L93 Difference]: Finished difference Result 525 states and 599 transitions. [2022-01-31 23:25:00,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 23:25:00,099 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 218 [2022-01-31 23:25:00,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:00,100 INFO L225 Difference]: With dead ends: 525 [2022-01-31 23:25:00,100 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 23:25:00,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=589, Invalid=13453, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 23:25:00,101 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 151 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10466 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 10687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 10466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:00,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 289 Invalid, 10687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 10466 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 23:25:00,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 23:25:00,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 420. [2022-01-31 23:25:00,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 320 states have (on average 1.028125) internal successors, (329), 324 states have internal predecessors, (329), 72 states have call successors, (72), 28 states have call predecessors, (72), 27 states have return successors, (71), 67 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 23:25:00,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 472 transitions. [2022-01-31 23:25:00,688 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 472 transitions. Word has length 218 [2022-01-31 23:25:00,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:00,689 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 472 transitions. [2022-01-31 23:25:00,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:25:00,689 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 472 transitions. [2022-01-31 23:25:00,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 23:25:00,690 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:00,690 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:00,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 23:25:00,690 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:00,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:00,690 INFO L85 PathProgramCache]: Analyzing trace with hash 1513912073, now seen corresponding path program 144 times [2022-01-31 23:25:00,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:00,690 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816680338] [2022-01-31 23:25:00,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:00,690 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:00,695 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:00,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:25:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:25:02,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 23:25:02,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:25:02,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:25:02,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:25:02,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:25:02,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:25:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:25:02,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:25:02,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:25:02,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:25:02,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:25:02,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:25:02,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:25:02,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:25:02,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:25:02,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:25:02,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:25:02,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:25:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:25:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 23:25:02,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 23:25:02,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:02,304 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:25:02,304 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:02,304 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816680338] [2022-01-31 23:25:02,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816680338] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:02,304 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:02,304 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 23:25:02,304 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262683347] [2022-01-31 23:25:02,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:02,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 23:25:02,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:02,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 23:25:02,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 23:25:02,305 INFO L87 Difference]: Start difference. First operand 420 states and 472 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:25:08,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:08,576 INFO L93 Difference]: Finished difference Result 520 states and 594 transitions. [2022-01-31 23:25:08,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 23:25:08,576 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 220 [2022-01-31 23:25:08,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:08,577 INFO L225 Difference]: With dead ends: 520 [2022-01-31 23:25:08,577 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 23:25:08,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=524, Invalid=11466, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 23:25:08,578 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 119 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 8282 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 8463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 8282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:08,578 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 260 Invalid, 8463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 8282 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 23:25:08,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 23:25:09,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 511. [2022-01-31 23:25:09,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 388 states have (on average 1.0231958762886597) internal successors, (397), 393 states have internal predecessors, (397), 94 states have call successors, (94), 29 states have call predecessors, (94), 28 states have return successors, (93), 88 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 23:25:09,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 584 transitions. [2022-01-31 23:25:09,364 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 584 transitions. Word has length 220 [2022-01-31 23:25:09,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:09,364 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 584 transitions. [2022-01-31 23:25:09,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 23:25:09,364 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 584 transitions. [2022-01-31 23:25:09,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 23:25:09,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:09,365 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 23:25:09,365 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1181403201, now seen corresponding path program 145 times [2022-01-31 23:25:09,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:09,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344804491] [2022-01-31 23:25:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:09,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:09,370 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:09,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:25:09,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:25:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 23:25:09,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 23:25:09,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 23:25:09,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 23:25:09,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 23:25:09,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 23:25:09,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 23:25:09,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 23:25:09,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 23:25:09,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 23:25:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 23:25:09,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 23:25:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 23:25:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 23:25:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 23:25:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 23:25:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 23:25:09,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 23:25:09,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 23:25:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 23:25:09,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 23:25:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 23:25:09,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:09,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:25:09,807 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:09,807 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344804491] [2022-01-31 23:25:09,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [344804491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:09,808 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:09,808 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 23:25:09,808 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928309771] [2022-01-31 23:25:09,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:09,808 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 23:25:09,808 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:09,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 23:25:09,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 23:25:09,808 INFO L87 Difference]: Start difference. First operand 511 states and 584 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 23:25:11,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:11,577 INFO L93 Difference]: Finished difference Result 611 states and 706 transitions. [2022-01-31 23:25:11,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 23:25:11,577 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 222 [2022-01-31 23:25:11,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:11,578 INFO L225 Difference]: With dead ends: 611 [2022-01-31 23:25:11,578 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 23:25:11,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1122, Invalid=4280, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 23:25:11,579 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 261 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:11,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 23:25:11,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 23:25:12,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-31 23:25:12,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 388 states have (on average 1.0206185567010309) internal successors, (396), 393 states have internal predecessors, (396), 94 states have call successors, (94), 29 states have call predecessors, (94), 28 states have return successors, (93), 88 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 23:25:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 583 transitions. [2022-01-31 23:25:12,332 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 583 transitions. Word has length 222 [2022-01-31 23:25:12,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:12,332 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 583 transitions. [2022-01-31 23:25:12,332 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 23:25:12,332 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 583 transitions. [2022-01-31 23:25:12,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 23:25:12,333 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:12,333 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:12,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 23:25:12,333 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:12,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:12,333 INFO L85 PathProgramCache]: Analyzing trace with hash -887114577, now seen corresponding path program 146 times [2022-01-31 23:25:12,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:12,333 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472966751] [2022-01-31 23:25:12,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:12,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:12,338 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:12,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 23:25:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 23:25:13,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 23:25:13,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 23:25:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 23:25:13,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,785 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 23:25:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 23:25:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 23:25:13,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 23:25:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 23:25:13,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 23:25:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 23:25:13,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 23:25:13,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 23:25:13,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 23:25:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 23:25:13,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 23:25:13,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 23:25:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 23:25:13,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 23:25:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 23:25:13,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,806 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 23:25:13,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 23:25:13,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 23:25:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 23:25:13,809 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 23:25:13,809 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472966751] [2022-01-31 23:25:13,810 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [472966751] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 23:25:13,810 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 23:25:13,810 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 23:25:13,810 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670105898] [2022-01-31 23:25:13,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 23:25:13,810 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 23:25:13,810 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 23:25:13,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 23:25:13,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 23:25:13,810 INFO L87 Difference]: Start difference. First operand 511 states and 583 transitions. Second operand has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:25:21,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 23:25:21,311 INFO L93 Difference]: Finished difference Result 625 states and 722 transitions. [2022-01-31 23:25:21,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 23:25:21,311 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 220 [2022-01-31 23:25:21,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 23:25:21,312 INFO L225 Difference]: With dead ends: 625 [2022-01-31 23:25:21,312 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 23:25:21,313 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=608, Invalid=14154, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 23:25:21,313 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 160 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10985 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 11219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 10985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 23:25:21,313 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 295 Invalid, 11219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 10985 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 23:25:21,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 23:25:22,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 580. [2022-01-31 23:25:22,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 440 states have (on average 1.0204545454545455) internal successors, (449), 446 states have internal predecessors, (449), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 23:25:22,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 670 transitions. [2022-01-31 23:25:22,236 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 670 transitions. Word has length 220 [2022-01-31 23:25:22,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 23:25:22,236 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 670 transitions. [2022-01-31 23:25:22,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 23:25:22,236 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 670 transitions. [2022-01-31 23:25:22,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 23:25:22,237 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 23:25:22,237 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 23:25:22,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 23:25:22,237 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 23:25:22,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 23:25:22,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1759445017, now seen corresponding path program 147 times [2022-01-31 23:25:22,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 23:25:22,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [931050151] [2022-01-31 23:25:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 23:25:22,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 23:25:22,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 23:25:22,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat